Download Heating Controller SDC District Heating Controller DHC 43

Heating Controller SDC
District Heating Controller DHC 43
SERVICE MANUAL
EN2H-0221GE51 R1105
SDC / DHC 43
EN2H-0221GE51 R1105
Service Manual
SDC / DHC 43
EN2H-0221GE51 R1105
Service Manual
Contents
SDC / DHC 43
Contents
1
SOFTWAREVERSION..........................................................................................................................................5
2
SAFETY INSTRUCTIONS ....................................................................................................................................6
2.1 Application .......................................................................................................................................................6
2.2 Conditions for start-up .....................................................................................................................................6
2.2.1 Do not separate the controller from the mains..........................................................................................6
2.2.2 Electric installation ....................................................................................................................................6
2.2.3 Safety measures for EMC-compatible installation ....................................................................................7
2.2.4 Cable dimensions......................................................................................................................................9
2.2.5 Maximum cable length ..............................................................................................................................9
2.2.6 Cable installation .......................................................................................................................................9
2.2.7 Cabinet earth and ground .........................................................................................................................9
2.3 Domestic hot water higher than 60 °C ..........................................................................................................10
2.4 Connecting accessories ................................................................................................................................10
2.5 Service and cleaning .....................................................................................................................................10
3
DHC 43 / SDC – OVERVIEW..............................................................................................................................11
4
ABBREVIATIONS...............................................................................................................................................12
5
OPERATION .......................................................................................................................................................13
5.1 User Interface ................................................................................................................................................13
5.1.1 Basic display ...........................................................................................................................................13
5.1.2 Operating elements.................................................................................................................................14
5.1.2.1 Rotary Pushbutton (Press/Turn) ......................................................................................................14
5.1.2.2 "Daytime Room Temperature" Key..................................................................................................14
5.1.2.3 "Night-time Room Temperature" Key...............................................................................................15
5.1.2.4 "Daytime DHW Temperature" Key...................................................................................................15
5.1.2.5 "Operating Mode" Key (Basic display) .............................................................................................16
5.1.2.6 "Heating Characteristic" Key............................................................................................................22
5.1.2.7 "System Information" Key ................................................................................................................23
5.1.2.8 "Manual Mode" / "Emission Measurement" Key ..............................................................................28
5.2 Parameter Input.............................................................................................................................................29
5.3 Automatic exit time ........................................................................................................................................29
5.4 Menu Selection..............................................................................................................................................30
5.4.1 Time-Date Menu......................................................................................................................................32
5.4.2 Time programs Menu ..............................................................................................................................32
5.4.2.1 Control Circuit Selection ..................................................................................................................33
5.4.2.2 Program Selection............................................................................................................................33
5.4.2.3 Weekday and Cycle Selection .........................................................................................................33
5.4.2.4 Programming Switching Times and Cycle Temperatures................................................................33
5.4.3 System Parameter Menu ........................................................................................................................43
5.4.3.1 Language Selection .........................................................................................................................43
5.4.3.2 Time Programs.................................................................................................................................43
5.4.3.3 Control Mode....................................................................................................................................45
5.4.3.4 Summer Switch-off (heating limit)/ Heating Limit.............................................................................46
5.4.3.5 Parameter Reset ..............................................................................................................................47
5.4.3.6 Full Reset .........................................................................................................................................47
5.4.4 Domestic Hot Water Menu ......................................................................................................................48
5.4.4.1 DHW Economy Temperature...........................................................................................................48
5.4.4.2 Legionella Protection-Day................................................................................................................48
5.4.5 Unmixed Circuit / Mixing Circuit 1 / Mixing Circuit 2 Menu .....................................................................48
5.4.5.1 Reduced Mode.................................................................................................................................48
5.4.5.2 Heating System................................................................................................................................49
5.5 Malfunction Messages...................................................................................................................................50
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EN2H-0221GE51 R1105
SDC / DHC 43
Contents
5.6 Parameter Settings........................................................................................................................................51
5.6.1 Hydraulic Menu........................................................................................................................................51
5.6.2 System Parameter Menu.........................................................................................................................53
5.6.3 Domestic Hot Water Parameter Menu (DHW) ........................................................................................54
5.6.4 Direct Heating Circuit Menu ....................................................................................................................55
5.6.5 Mixing circuit 1 / Mixing circuit 2 Menus..................................................................................................56
5.6.6 Heat Generator Menu..............................................................................................................................57
5.6.7 District Heating Menu ..............................................................................................................................59
5.6.8 Return control Menu................................................................................................................................59
5.6.9 Solar Menu ..............................................................................................................................................59
5.6.10 Solid Fuel Menu ......................................................................................................................................60
5.6.11 Buffer Menu .............................................................................................................................................60
5.6.12 Menu "Cascade"......................................................................................................................................60
5.6.13 Data Bus Menu........................................................................................................................................61
5.6.14 Relay Test Menu .....................................................................................................................................61
5.6.15 Malfunction Messages Menu...................................................................................................................62
5.6.16 Sensor Calibration Menu.........................................................................................................................62
6
CONTROL FUNCTIONS .....................................................................................................................................63
6.1 Adjusting the hydraulic parameters ...............................................................................................................63
6.1.1 Connection and settings table .................................................................................................................64
6.2 Switching Time Program Enabling ................................................................................................................64
6.3 Suppressing the cycle temperature on Time program level..........................................................................64
6.4 Enabling of Separate Control Mode ..............................................................................................................65
6.5 Temperature display in Fahrenheit................................................................................................................65
6.6 Selection of Hydraulic Parameter Presettings...............................................................................................65
6.7 The Variable Inputs and Outputs of the Smile controllers.............................................................................66
6.8 General Functions and their Operation .........................................................................................................66
6.8.1 Outside Temperature Measurement .......................................................................................................66
6.8.1.1 Building Type....................................................................................................................................66
6.8.2 Heating Circuit Outside Temperature Assignment..................................................................................66
6.8.3 Climate Zone ...........................................................................................................................................67
6.8.4 Summer Switch-off ..................................................................................................................................67
6.8.5 System Frost Protection ..........................................................................................................................68
6.8.6 Anti-blocking Protection...........................................................................................................................69
7
HYDRAULIC COMPONENTS AND THEIR FUNCTIONS..................................................................................70
7.1 Heat Generatior: Boiler..................................................................................................................................70
7.1.1 Heat Generator Start-up Protection ........................................................................................................70
7.1.2 Heat Generator Minimum Temperature Limit..........................................................................................70
7.1.3 Heat Generator Maximum Temperature Limit.........................................................................................71
7.1.4 Heating circuits minimum temperature limit ............................................................................................71
7.1.5 Heat Generator Sensor Operating Modes ..............................................................................................71
7.1.6 Minimum Burner Run time.......................................................................................................................72
7.1.7 Multi-stage Heat Generator/ Switching Differential .................................................................................72
7.1.8 Switching for modulating burners ............................................................................................................75
7.1.9 Modulation P-band (Xp) ..........................................................................................................................76
7.1.10 Modulation sample time Ta .....................................................................................................................76
7.1.11 Modulation integral action time Tn ..........................................................................................................76
7.1.12 Modulation running time ..........................................................................................................................76
7.1.13 Modulation starting time ..........................................................................................................................76
7.1.14 Modulation starting load ..........................................................................................................................77
7.1.15 When to apply boiler sensor 2.................................................................................................................77
7.1.16 External heat generator disable ..............................................................................................................77
7.1.17 Heat generator forced dissipation ...........................................................................................................78
7.1.18 Flue gas temperature monitoring ............................................................................................................78
7.2 Heat Exchanger Heat Generator, district heating..........................................................................................79
7.2.1 District Heating Valve On / Off Mode (district heating) ...........................................................................79
7.2.2 Continuous Heat Exchanger Valve Control (district heating)..................................................................80
EN2H-0221GE51 R1105
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Contents
SDC / DHC 43
7.2.3 District Heating Return Temperature Limit (district heating)...................................................................81
7.2.4 Return Temperature Limitation for DHW Loading (district heating)........................................................82
7.2.5 Hot-water pre-control for District heating systems ..................................................................................82
7.2.6 Mode of operation – hot-water pre-control..............................................................................................84
7.2.7 Operating principle – HW operating mode “External operation” .............................................................84
7.2.8 Conditional parallel operation for mixing circuits.....................................................................................84
7.2.9 Operating mode circulation pump ...........................................................................................................85
7.2.10 Deactivation district heating control ........................................................................................................85
7.2.11 Return Interval flushing (district heating) ................................................................................................85
7.2.12 Heat meter for additional limitation according to the volume flow or thermal output (district heating) ...86
7.2.13 Charging pump (CHP).............................................................................................................................86
7.2.14 Primary pump ..........................................................................................................................................87
7.2.15 Boiler circuit pump...................................................................................................................................87
7.2.16 Parallel heat generator enabling (PWF)..................................................................................................88
7.2.17 Return control..........................................................................................................................................88
7.2.17.1 Bypass pump (RBP) ........................................................................................................................89
7.2.17.2 Return control through controlled flow mixing..................................................................................89
7.2.17.3 Indirect return control .......................................................................................................................89
7.3 Heating Circuit ...............................................................................................................................................90
7.3.1 General Heating Circuit Functions ..........................................................................................................90
7.3.1.1 Heating Characteristic Curve ...........................................................................................................90
7.3.1.2 Setting of the Heating Characteristic Curve.....................................................................................91
7.3.1.3 Heating Circuit Reduced Mode ........................................................................................................92
7.3.1.4 Heating system (exponent) ..............................................................................................................93
7.3.1.5 Heating Circuit Temperature Limitation ...........................................................................................93
7.3.1.6 Heating Circuit Parallel Shift ............................................................................................................94
7.3.1.7 Heating Circuit Pump extended running time ..................................................................................94
7.3.1.8 Screed function ................................................................................................................................94
7.3.2 Heating Circuit Constant Temperature Control.......................................................................................96
7.3.3 Fixed Value Control.................................................................................................................................96
7.3.4 Assessment of the Room Temperature / Room Influence......................................................................97
7.3.4.1 Heating Circuit with Room influence ...............................................................................................97
7.3.4.2 Heating Circuit Room Factor............................................................................................................98
7.3.4.3 Room Controller Heating Circuit ......................................................................................................98
7.3.4.4 Heating curve adaptation heating circuit..........................................................................................98
7.3.4.5 Heating Circuit Switch-on Optimisation ...........................................................................................99
7.3.4.6 Function Heating Limit ...................................................................................................................100
7.3.4.7 Heating Circuit Room frost protection Limit ...................................................................................101
7.3.4.8 Room Thermostat Function (Room Temperature Maximum Limit) ...............................................101
7.3.5 Domestic Hot Water Heating.................................................................................................................105
7.3.5.1 DHW Tank Loading (DHWP) .........................................................................................................105
7.3.5.2 Circulation pump (CIR.) .................................................................................................................108
7.3.6 Solar / Solid Fuel / Buffer ......................................................................................................................109
7.3.6.1 Solar Loading Pump (SOP) ...........................................................................................................109
7.3.6.2 Buffer Loading Pump (BULP) ........................................................................................................112
7.3.6.3 Solid Fuel Loading Pump (SFP) ....................................................................................................119
7.3.7 Solar loading switchover .......................................................................................................................120
7.3.8 Solar forced dissipation.........................................................................................................................121
7.3.9 Hydraulic buffer relief (HBR) .................................................................................................................122
7.3.10 Other System Components...................................................................................................................122
7.3.10.1 Global Malfunction Message input.................................................................................................122
7.3.10.2 Global Malfunction Message output...............................................................................................123
7.3.10.3 Timer ..............................................................................................................................................123
7.3.10.4 External switching modem .............................................................................................................123
7.3.10.5 External information .......................................................................................................................124
7.3.10.6 Demand Contact ............................................................................................................................124
7.3.11 Bus Communication ..............................................................................................................................125
7.3.11.1 Controller Bus Address ..................................................................................................................125
7.3.11.2 Control functions via the bus..........................................................................................................126
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EN2H-0221GE51 R1105
SDC / DHC 43
Contents
7.3.11.3 Operation of wall devices ...............................................................................................................129
7.3.12 Cascading of heat generators in the bus system ..................................................................................132
7.3.12.1 General description of cascading of control devices......................................................................132
7.3.12.2 Functions of the cascade parameter..............................................................................................133
7.3.12.3 Mode of operation of cascade control............................................................................................133
7.3.13 Start-up, Maintenance and Troubleshooting Help.................................................................................135
7.3.13.1 Automatic set functions ..................................................................................................................135
7.3.13.2 Emission Measurement (not for DHC43) .......................................................................................135
7.3.13.3 Relay / Function Test .....................................................................................................................136
7.3.13.4 Malfunction Messages ...................................................................................................................137
7.3.13.5 Sensor Calibration..........................................................................................................................139
7.3.13.6 Controller global reset ....................................................................................................................139
7.3.13.7 Controller time correction ...............................................................................................................139
8
TECHNICAL DATA ...........................................................................................................................................140
8.1 General ........................................................................................................................................................140
8.1.1 Installation recommendations................................................................................................................140
8.2 Sensor Resistance Values ..........................................................................................................................141
8.3 Sensor measuring ranges ...........................................................................................................................141
8.4 Digital inputs ................................................................................................................................................142
EN2H-0221GE51 R1105
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Safety Instructions
SDC / DHC 43
1 Softwareversion
Please use this documentation in conjunction with softwareversion V2.1 of your
controller. The version will be displayed for about 8 s when the controller is
connected to the mains. If you may be using an older version, please contact your
heating specialist.
5
EN2H-0221GE51 R1105
SDC / DHC 43
Safety Instructions
2 Safety Instructions
2.1
Application
The Smile controller family DHC/SDC is designed exclusively for the control of warm
water heating and district heating systems including domestic hot water control.
These systems should not exceed a flow temperature of 120 °C.
2.2
Conditions for start-up
2.2.1 Do not separate the controller from the mains
CAUTION
The heating installation must be completed and filled with water in order to
prevent the pumps from running dry and to avoid damage for the boiler.
The controll system must be installed according to the mounting instructions.
All electrical connections (power supply, burner, valve actuator, pumps and
sensors) must be carried out according to the local rules and standards and
must comply with the attached wiring diagrams.
If a floor heating system is connected, a limiting thermostat must switch off
the pump if the flow temperatures are too high.
The heating specialist must check the complete installation before switching
on the controller.
IMPORTANT NOTE!
The actual time and date are already adjusted from the factory and backed up by a
battery.
There is a basic time program already activated and the control functions for
standard heating systems with low temperature boilers are pre-adjusted.
If this happens the back-up battery will be unnecessarily stressed. Also the frost
protection functions of the controller will be out of order.
2.2.2 Electric installation
All electrical connections must be carried out by qualified personnel.
EN2H-0221GE51 R1105
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Safety Instructions
SDC / DHC 43
2.2.3 Safety measures for EMC-compatible installation
Cables under mains power must always be laid separately from sensor and data bus
cables, with a minimum distance of 2 cm between the cables. Cable crossings are
allowed.
15 cm
Mains 230 V~
Data bus cable 12 V~
2cm
For control devices powered through a separate mains connection, separation
between power cables and sensor or bus cables must be maintained under all
circumstances. If cable ducts are used, these ducts must be fitted with separating
webs.
When installing control or room devices, a minimum distance of 40 cm must be
maintained between the devices and other electrical systems emitting
electromagnetic radiation, e.g. contactor switches, motors, transformers, dimmers,
microwave and TV products, loudspeakers, computers, mobile phones, etc..
40 cm
Room devices and central devices must be separated by a distance of at least 40
cm. Several central devices connected to the data bus can be installed immediately
next to each other.
The mains power connection of the heating system (boiler – control panel – control
device) must be laid out as an independent circuit, to which neither fluorescent
lamps nor other possible sources of interference may be connected or connectable.
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EN2H-0221GE51 R1105
SDC / DHC 43
Safety Instructions
Circuit breaker 16 A
Heating room emergency switch
Heating room and power
sockets must be connected to
separate circuit!
Room device(s)
Heat generator
Shielded cables must be used for the data bus lines.
Recommended construction: see Technical Data, page 139.
The cable shield must be grounded on only one side at the ground connector, e.g. at
the metal enclosure of the heat generator, ground clamp, etc. Multiple grounding of
any one cable is not allowed (ground loop noise).
Do not ground here!
Central device
Ground
EN2H-0221GE51 R1105
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Safety Instructions
SDC / DHC 43
Double grounding is not allowed in star-shaped data bus systems. The ground
connection must be installed on side only, at the neutral point!
Shielding
2-core
data bus cable
Terminal block
Junction box
The external sensor must not be installed in the vicinity of transmitter or receiver
units (e.g. on garage walls close to a receiver of a remote-control garage door
opener, ham radio antennas or in direct proximity to major transmission stations,
etc.).
2.2.4 Cable dimensions
1.5 mm² for all 230 V cable (power supply, burner, pumps, actuators).
0.5 mm² for sensors, selectors , bus and analogue in- and outputs.
2.2.5 Maximum cable length
Sensors selectors and analogue inputs
A maximum cable length of 200 meters is recommended. Longer distances are
possible but increase the risk of interferences.
Relay outputs
Unlimited cable length.
Bus connections
A maximum cable length of 100 meters is strongly recommended.
2.2.6 Cable installation
Cables for 230 V must be installed separate from low voltage (sensor selector bus)
cables.
2.2.7 Cabinet earth and ground
Please install and connect the controllers according to local rules and standards!
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EN2H-0221GE51 R1105
SDC / DHC 43
2.3
Safety Instructions
Domestic hot water higher than 60 °C
Please note that in the following cases there is a danger at hot water tabs (kitchen,
bath). In order to avoid scalding please mix enough cold water.
Anti legionella automatic
If the anti legionella automatic is activated, the domestic hot water will automatically
be heated up to temperatures around 65 °C order to kill legionella bacteria in the hot
water system.
Manual operation / Emission measurement
In the manual mode / emission measurement mode the domestic hot water can be
heated up to the maximum possible boiler temperature because the burner and all
pumps are switched on and the valves will be completely opened. Also here there is
the danger of scalding at all warm water tabs in the building. Please mix enough cold
water or switch the domestic hot water loading pump manually off (if there is a switch
at the pump).
Heating and domestic hot water are not temperature controlled in these modes.
These modes are especially used by the emission measurement specialist or by the
installer in case the controller is defect. The high water temperatures can however
be avoided if the boiler thermostat is adjusted to a max. of 60 °C.
2.4
Connecting accessories
CAUTION
According to VDE 0730 the power supply for the controller must have a
separate main switch for life and neutral. Please follow local rules and
standards for cabinet earth and ground!
As soon as there is power supply at the terminals 21, 22, 2, 6, 12 and 18 also
the terminal rows X3 and X4 will carry 230 V connections!
External switches must be installed if a manual switch function is desired for
pumps. All accessories (sensors, selectors, etc.) must be connected
according to the attached wiring.
2.5
Service and cleaning
The controller is service free. The unit can be cleaned with a moist cloth from the
outside.
EN2H-0221GE51 R1105
10
Overview
SDC / DHC 43
3 DHC 43 / SDC – Overview
Variable output 2
x
x
x
x
x
x
x
DHW loading pump
x
x
x
x
x
x
x
Mixing circuit 2
x
Mixing circuit 1
x
Variable output 2
x
x
x
x
x
Direct circuit
variable output 3
3-Rel.
3-Rel
6-Rel.
6-Rel.+ 2 Variable
7-Rel.+ 2 Variable
10-Rel.+ 2 Variable
7-Rel
7-Rel.+ 2 Variable
10-Rel.
+ 2 Variable
1st burner stage
SDC 3-10
DHC 3-40*
SDC 6-20
SDC 8-21
SDC 9-21
SDC 12-31
DHC 43-1*
DHC 43-2*
DHC43-3*
2nd burner stage or
district heating valve
closed
Type
Number of output
relays
This document describes the Smile controller family DHC/SDC for panel installation
and wall mounting. The product is available in the following variations for use as a
built-in controller and as a wall-mounted controller:
x
x
x
x
x
x
x
x
X
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
* District heating versions.
11
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
4 Abbreviations
The following abbreviations are used in this document and in the control unit display:
ABS
Reduced mode
PF
Buffer tank sensor (upper)
AF
Outdoor sensor
PF 2
Buffer tank sensor 2 (lower)
AF 2
Outdoor sensor 2
RG
Room device for room temp. measurem.
AGF
Flue gas temperature sensor
RBP
Return bypass pump
AT
Outside temperature
PLP
Buffer loading pump
BCP
Boiler circuit pump
RBP
Return bypass pump
BS
Buffer sensor (upper)
RED
Reduced mode
BS2
Buffer sensor (lower)
RLP
Return flow pump
BULP
Buffer loading pump
SBUS
Solar buffer sensor
BUS
System data bus
SD I
Switching differential I
BZ1
Op. hours counter burner stage 1
SD II
Switching differential II
BZ2
Op. hours counter burner stage 2
SF
Storage tank sensor
CHP
Charging pump
SFD
Solar forced dissipation
CIR
Circulation pump
SFB
Solid-fuel buffer sensor
DHC
Direct heating circuit
SFP
Solid-fuel loading pump
(D)HW
(Domestic) hot water
SFS
Solid-fuel boiler sensor
DHWP
Hot water loading pump
SLP
Storage tank loading pump
DK
Direct heating circuit
SLV
Solar loading switch-over
DKP
Direct heating circuit pump
SLVS
Sensor solar loading switch-over
ECO
Switch-off mode
SOP
Solar loading pump
ELH
Electric heating element
SPFS
Solar panel flow sensor
FKF
Solid-fuel boiler sensor
SPRS
Solar panel return sensor
FPF
Solid-fuel buffer sensor
SSP
Stratified storage pump
FR
Fixed-value regulation
VA
Variable output (general)
FSP
Solid-fuel loading pump
VA/VO1
Variable output 1
HBR
Hydraulic buffer relief
VA/VO2
Variable output 2
IMP
Pulse input
VE/VI
Variable input (general)
KP
Boiler circuit pump
VE/VI1
Variable input 1
CC
Constant control
VE/VI2
Variable input 2
KRLF
Solar panel return flow sensor
VE/VI3
Variable input 3
KSPF
Solar tank / buffer sensor
VF1
Flow sensor mixer circuit 1
KVLF
Solar flow sensor
VF2
Flow sensor mixer circuit 2
MIMO
Mixer motor
PWF
Parallel heat generator enabling
WEZ
Heat generator
MK/MC Mixer heating circuit
MKP
Mixer circuit pump
WF/KF
Heat generator sensor
P1
Switching time program
ZKP
Circulation pump
P2
Switching time program
ZUP
Charging pump
P3
Switching time program
EN2H-0221GE51 R1105
12
Operation
SDC / DHC 43
5 Operation
5.1
User Interface
5
1
6
2
7
3
8
4
9
10
11
1
"Manual mode" key / "Emission Measurement" key (not applicable for district heating controllers)
2
"Operating mode" key for permanent and temporary operating modes (Basic display)
3
"Heating characteristics" key
4
"Information" key for the display of temperatures and operating statuses
5
Multi-functional Display
6
Cover clip for the service jack
7
"Daytime room temperature setpoint" key
8
"Night-time room temperature setpoint" key
9
"DHW daytime temperature setpoint" key
10
Rotary pushbutton (push and turn)
11
Operating modes symbols
5.1.1 Basic display
Date
Time
Active operating mode
Operating modes symbols
MO. 18.MAR. 01
11.47
40.0
▼
oc
Heat generator temperature
æ ç è é ê ë ì í
The display illumination is activated with every push of a key, respectively the rotary
pushbutton and switches off after a longer periode of inactivity.
13
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
When the controller is first started or after a power cut a segment test + fault
diagnosis is carried out. After this test the software version and the controller type is
displayed.
In the automatic mode the basic display shows the weekday, the date, the time and
the heat generator temperature. Depending on the adjusted operating mode other
information will be displayed.
Active heating limits will be shown with the "umbrella"icon, frost protection with the
"crystal" icon.
5.1.2 Operating elements
5.1.2.1 Rotary Pushbutton (Press/Turn)
ð
By pressing the rotary pushbutton once, you can:
• Confirm inputs/values
By prolonged pressing (ca. 3 s) the rotary pushbutton, you can:
• Shift to the menu selection level
• Get one menu level higher
By turning the rotary pushbutton, you can:
• Change values (clockwise increases values, counter-clockwise decreases
values)
• Browse through menus
5.1.2.2 "Daytime Room Temperature" Key
¥
This key sets the room temperature setpoint in the automatic program during the
heating cycles as well as during the PARTY and HEATING operating modes. In
control mode 1 the set point is identical for all the heating circuits. In control mode 2
the setpoint can be individual for all circuits. To change the control mode, see 5.4.3.3
Control Mode section.
NOTE!
These setpoints are the starting values for the individual temperature settings during
the heating cycles (= cycle temperatures) in the switching time menu. If these values
differ from the starting value, they are being corrected with the Requisite amount of
the adjustment if a subsequent adjustment of the setpoint is made.
If wall modules are connected they always show the Requisite setpoint of their
corresponding heating circuit on their display.
ROOM-DAY
20.0
oc
æ ç è é ê ë ì í
EN2H-0221GE51 R1105
Setting:
Press the "daytime room temperature" key ¥.
► Set the flashing room temperature default value by turning the rotary pushbutton
î to the desired value.
► Confirm the set value by pressing either the "daytime room temperature" key ¥
key or the rotary pushbutton î.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
►
14
Operation
SDC / DHC 43
Factory setting
Setting range
20 °C
5 ... 30 °C
5.1.2.3 "Night-time Room Temperature" Key
¦
This key sets the reduced room temperature setpoint in the automatic program
between the heating cycles as well as during the ABSENT and REDUCED operating
modes.
In control mode 1 the set point is identical for all the heating circuits. In control mode
2 the setpoint can be individual for all circuits. To change the control mode, see
"Control Mode"section.
NOTE!
ROOM-NIGHT
16.0
oc
æ ç è é ê ë ì í
Factory setting
Setting range
If wall modules are connected they always show the Requisite setpoint of their
corresponding heating circuit on their display
Setting:
► Press the "night-time room temperature" key ¦.
► Set the flashing room temperature default value by turning the rotary pushbutton
î to the desired value.
► Confirm the set value by pressing either the "night-time room temperature" key
¦ or the rotary pushbutton î.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
16 °C
5 ... 30 °C
5.1.2.4 "Daytime DHW Temperature" Key
§
NOTE!
DHW
DAY
This key sets the DHW temperature setpoint during the DHW operating times in the
automatic program as well during the PARTY and HEATING operating modes.
This setting value applies also for domestic hot water only mode (manual summer
mode).
This setpoint is the starting value for the individual temperature setting during the
DHW cycles (= cycle temperatures) in the switching time menu. If this value differs
from the starting value, they are being corrected with the Requisite amount of the
adjustment if a subsequent adjustment of the setpoint is made.
Setting:
Press the "daytime DHW temperature" key §.
► Set the flashing room temperature default value by turning the rotary pushbutton
î to the desired value.
► Confirm the set value by pressing either the"daytime DHW temperature" key §
or the rotary pushbutton î.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
►
50.0
oc
æ ç è é ê ë ì í
Factory setting
50 °C
15
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Setting range
Hot water economy temperature ... water heater maximum temperature limit (service
setting)
Single DHW loading
Function
Pushing the"daytime DHW temperature" key § longer than 3 s will lead to the
single DHW loading function. This function will override the actual time program.
I TIME DHW
0.0
▼
min
The operator will see an adjustable time with the following meaning:
0 s:
the single loading function will be carried out only once. The setpoint is
the DHW day setpoint. As soon as the setpoint is reached this function
is disabled again.
>0 s:
The DHW day setpoint is maintained for the adjusted time interval. The
time interval can be adjusted between 0 and 240 min with the rotary
pushbutton.
æ ç è é ê ë ì í
5.1.2.5 "Operating Mode" Key (Basic display)
¢
The desired operating mode can be selected with this key. The operating mode
appears in plain text, while at the same time a cursor at the bottom of the display
indicates the relevant operating mode symbol. The selected operating mode applies
for all heating circuits in control mode 1. In control mode 2, every heating circuit can
be assigned with its own operating mode. To change the control mode see 5.4.3
System Parameter Menu.
Overview of the Operating Modes
Arrow
on
Symbol
Program
Display in basic mode
Setting
æ
Holiday
Return Date
ç
Absence
P1 (2, 3), Return
time
è
é
EN2H-0221GE51 R1105
the
P1(2,3),
Party
Party End Time
Automatic
P1 (2, 3)
16
Operation
SDC / DHC 43
ê
Summer
ë
Constant
Mode
Heating
ì
Constant
Mode
Reduced
í
P1 (2, 3)
Constant
Standby Mode
Setting:
► Press the "operating mode" key ¢.
► Set the flashing operating mode by turning to the desired operating mode.
► Confirm the value by pressing the "operating mode" key ¢ or the rotary
pushbutton î.
► In case of short-term operating modes (Holiday, Absence, Party) set the desired
target value by turning the rotary pushbutton î and confirm the set value as
described above.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see(see 5.1.2.7 "System Information).
► Return to the basic display by keeping the "operating mode" key ¢ pressed for
about 3 s.
Return to the
basic display
5.1.2.5.1
Holiday Mode (Short-term Program)
HOLIDAY
18.20
By keeping the ¢ key pressed for about 3 seconds.
TIL
By means of this program the heating and domestic hot water (DHW) can be
switched off with frost protection for the whole duration of the holiday.
24.09
▼
æ ç è é ê ë ì í
Application
Long absence during the heating season
17
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Control during the
holiday mode
If outdoor temperatures are below the frost limit, the heating circuits
without wall modules are controlled at a roomsetpoint of 3°C
with wall modules are controlled to their individual frost protection limit
(see mixing circuit parameter 8: room frost protection limit)
Setting
Terminate holiday mode
Factory setting
Setting range
Display
5.1.2.5.2
An active holiday mode can be terminated for an early return. Simply press the
"operating mode" key ¢ and adjust to automatic.
Current date
Current date ... Current date + 250 days
An active holiday program appears on the basic display with the indication of the
return date.
Absence Mode (Short-term Program)
ABSENT TIL
20.10
See 5.1.2.5 "Operating Mode" Key (Basic display)
01.10
▼
æ ç è é ê ë ì í
Application
Setting
Terminate absence mode
Factory setting
Setting range
By means of this program the heating can be temporarily switched off in case of a
brief period of absence. During the period of absence all the heating circuits are
controlled according to the specified reduced room temperature. At the expiry of the
set time the heating circuits return automatically to the operating mode that was
active before the absence program. Short-term programs like Party or Holiday will be
skipped during this mode.
Short-term absence within the heating season
See 5.1.2.5 "Operating Mode" Key (Basic display)
An active absence mode can be terminated for an early return. Simply press the
"operating mode" key ¢ and adjust to automatic.
P1 from the time of activation (the next switch on time leads back to automatic
mode)
P1 (absent up to the next switch-on time)
0.5 hours from the activation ... 24 hours from the activation
P1 (P2, P3):
Program-controlled restart of the automatic mode. After activating the REDence
program the heating is stopped until the next switch-on time of the current automatic
program P1 (as well as P2 or P3 if enabled).
0,5 ... 24h:
The set time periode is added on the basis of the current time and represents the
return time. When calling the REDence program again, the last set value is saved
and used as the new default value.
Display
EN2H-0221GE51 R1105
An active absence program appears on the basic display with the indication of the
return time.
18
Operation
5.1.2.5.3
SDC / DHC 43
Party Mode (Short-term program)
PARTY TIL
02.30
20.10
This program provides for a one-time intermediate heating of all the heating circuits
up to a specified time and skips completely or in part a forthcoming or an already
active reduced cycle. At the expiry of the set time the heating circuits return
automatically to the operating mode that was active before the party program.
Short-term programs like ABSENCE or HOLIDAY will be skipped during this mode.
▼
æ ç è é ê ë ì í
Application
Setting
Terminate party mode
Factory setting
Setting range
One-time unscheduled extension of the heating or intermediate heating during
reduced mode
See 5.1.2.5 "Operating Mode" Key (Basic display)
An active party mode can be terminated for an early return. Simply press the
"operating mode" key ¢ and adjust to automatic.
P1 after activation (the next switch on time leads back to automatic mode)
P1 (Party mode up to the next switch-on time), or
0.5 hours from the activation ... 24 hours from the activation
P1 (P2, P3):
Program-controlled restart of the automatic operation. After activating the party
program the heating mode is continued until the next switch-off time of the current
automatic program P1 (as well as P2 or P3 if enabled).
0,5 ... 24h:
The set time periode is added on the basis of the current time and represents the
return time. When calling the party program again, the last set value is saved and
used as the new default value.
Display
5.1.2.5.4
Automatic Mode
In automatic mode automatic time programs with various heating times are available.
The standard time programs set at the factory can be overwritten if necessary with
one’s own switching times (see 5.4.2 Time programs Menu).
FR. 21.SEP.01
13.15
An active party program appears on the basic display with the indication of the
duration of the party.
58.0
▼
oc
æ ç è é ê ë ì í
If necessary, up to three different switching programs can be utilized (see 5.4.3.2
Time Programs)
All three automatic programs have for each weekday up to three heating cycles per
circuit with its own switch-on time, switch-off time and cycle temperature.
In case of heating circuits the last one refers to the room temperature, while in case
of domestic hot water circuits it refers to the water heater temperature.
If standard programs are used, these are preset at the factory with one or two
heating cycles. (An overview of the standard programs is provided in the description
of the switching time programming.)
NOTE!
The automatic programs P2 or P3 can be selected only if they were enabled in the
System Paramete Menu (Parameter 2 – Time Program = P1-P3). If they are not
enabled, only Program P1 is active.
19
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Application
Setting
Terminate automatic
mode
Disable/Enable P2-P3
FR. 21.SEP.01
Â
13.15
58.0
▼
Municipial buildings (schools, administration etc.), heating and domestic hot water on
weekends frostprotected switched off, program changes in case of shift operation.
See 5.1.2.5 "Operating Mode" Key (Basic display)"
An active automatic mode can be terminated for an early return. Simply press the
"operating mode" key ¢ and adjust to automatic.
Disable Programs P2 - P3
System Parameter - Menu Time Program = P1
The selected automatic program is activated by pressing the rotary pushbutton. All
the heating circuits as well as the hot water circuit work exclusively according to the
standard or personalized programmed switching times in automatic program P1.
The P1 programs does not appear on the display.
oc
æ ç è é ê ë ì í
Enable Programs P2 - P3
System Parameter Menu - Time Program = P1-P3
If the automatic program was confirmed by pressing the rotary pushbutton, program
P1 starts to flash. By means of the rotary pushbutton programs P2 … P3 can be
selected.
FR. 21.SEP.01
oc
13.15
Display
58.
0
▼
æ ç è é ê ë ì í
5.1.2.5.5
An active automatic program appears on the basic display with the current time and
date. If automatic programs P2 and P3 are enabled, the relevant symbol é1, é2, or
é3 is inserted depending on the selected program.
Manual Summer Mode (Only DHW)
In this program only the domestic hot water circuit remains active and the
temperature is controlled according to the DHW setpoint and the DHW time
program. The heating system is frost protected.
SUMMER
oc
58.NOTE!
0
▼
æ ç è é ê ë ì í
Setting
The manual summer mode can only be selcted in control mode 1 because it
influences the complete controller function (heating + DHW)
See 5.1.2.5 "Operating Mode" Key (Basic display)
Terminate manual
summer mode
An active manual summer mode can be terminated for an early return. Simply press
the "operating mode" key ¢ and adjust to automatic.
Disable/Enable P2-P3
Disable Programs P2 - P3
System Parameter - Menu Time Program = P1
The selected automatic program is activated by pressing the rotary pushbutton. All
the heating circuits as well as the hot water circuit work exclusively according to the
standard or personalized programmed switching times in automatic program P1.
The P1 programs does not appear on the display.
SUMMER
58.0
▼
oc
æ ç è é ê ë ì í
EN2H-0221GE51 R1105
20
Operation
SDC / DHC 43
SUMMER
Â
13.15
58.
0
▼
oc
Enable Programs P2 - P3
System Parameter Menu - Time Program = P1-P3
If the automatic program was confirmed by pressing the rotary pushbutton, program
P1 starts to flash. By means of the rotary pushbutton programs P2 … P3 can be
selected.
æ ç è é ê ë ì í
Display
5.1.2.5.6
Constant Heating Mode
This program provides for uninterrupted heating according to the specified daytime
room temperature. The DHW heating works continuously according to the specified
DHW setpoint.
HEATING
12.00
A manual summer mode appears on the basic display with the indication SUMMER.
If automatic programs P2 and P3 were enabled, the relevant symbol é1, é 2, or
é 3 is inserted depending on the selected program. This is then the valid DHW time
program.
22.▼0
oc
æ ç è é ê ë ì í
Setting
Terminate constant
heating mode
5.1.2.5.7
An active constant heating mode can be terminated for an early return. Simply press
the "operating mode" key ¢ and adjust to automatic.
NOTE!
The operating mode HEATING remains active until a different operating mode is
selected
Display
An active constant heating mode appears on the basic display with the indication
HEATING.
Constant Reduced Mode
RED. HEATING
oc
19.40
See 5.1.2.5 "Operating Mode" Key (Basic display)
40.0▼
æ ç è é ê ë ì í
NOTE!
Setting
Terminate constant
reduced mode
This program provides for a constant reduced heating mode according to the
specified reduced room temperature corresponding to the ECO (frost protected
switch-off mode) or ABS (reduced mode) reduced operating mode set at a heating
circuit level in compliance with the low limit of the relevant heating circuit.
See the parameter menu Unmixed Circuit, Mixing circuit 1 or Mixing circuit
2/Parameter 1 = Reduced Mode. The DHW heating works constantly according to
the specified DHW economy temperature (see the menu DHW /Parameter 1- DHW
Economy Temperature).
The operating mode REDUCED remains active until a different operating mode is
selected
See 5.1.2.5 "Operating Mode" Key (Basic display)
An active constant reduced mode can be terminated for an early return.
Simply press the "operating mode" key ¢ and adjust to automatic.
21
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Display
5.1.2.5.8
An active constant reduced mode appears on the basic display with the indication
REDUCED.
Standby Mode
In this mode the entire system is switched off and provided with frost protection (all
frost protection functions are active). The DHW heating is blocked and has frost
protection. At tank temperatures of below 5 °C the water is reheated to 8 °C.
STANDBY
oc
17.20
55.
0▼
Application
æ ç è é ê ë ì í
Setting
Terminate standby mode
NOTE!
Display
Complete switch-off of the heating and hot water including a complete building frost
protection
See 5.1.2.5 "Operating Mode" Key (Basic display)
An active standby mode can be terminated for an early return. Simply press the
"operating mode" key ¢ and adjust to automatic.
The heat generator and hot water heating remain active upon external request or
upon the request of other heating circuits connected via bus. The heating circuit
pumps are switched on briefly every day (pump anti-blocking protection).
An active standby mode appears on the basic display with the indication STANDBY.
5.1.2.6 "Heating Characteristic" Key
£
This key makes it possible to set the heating characteristics for the system’s heating
circuits. To view the diagram, please refer to 7.3.1.2 Setting of the Heating
Characteristic Curve.
The slope of the heating characteristic describes the relation between the change in
the flow temperature with the change in the outside temperature. In case of large
heating surfaces like floor heating systems the heating characteristic is less steep
compared to smaller heating surfaces (e.g. radiators). The set value refers to the
lowest outside temperature at the basis of the heat demand calculation.
CAUTION
HEATCURVE
MC1
1.00
æ ç è é ê ë ì í
Setting Range
Factory Setting
EN2H-0221GE51 R1105
This parameter is to be set by the heating technician and should not be altered
anymore.
Setting:
► Press "heating characteristic" key £.
► Turn the rotary pushbutton î in order to select the desired heat circuit.
► Confirm the set value by pushing the rotary pushbutton î.
► Turn the rotary pushbutton î in order to set the characteristc type.
► Confirm the set value by pushing the rotary pushbutton î.
► Adjust the flashing value and confirm.
► To return to the basic display, press the "heating characteristic" key £.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
0.20 ... 3.5
Direct heating circuit
Mixer heating circuit 1
Mixer heating circuit 2
(DK): = 1.50
(MK1): = 1.00
(MK2): = 1.00
22
Operation
SDC / DHC 43
5.1.2.7 "System Information" Key
¤
With the "information" key ¤ a query of all the system information can be made by
using the rotary pushbutton.
The first data item to appear always is the outside temperature. By turning the rotary
pushbutton î clockwise the system temperatures and the counter and consumption
statuses appear; by turning the rotary pushbutton î counter-clockwise the operating
statuses of the connected system components appear.
NOTE!
Example
The information displayed depends on the plant components installed and the
control loops.
See the operating scheme and tables below
23
EN2H-0221GE51 R1105
SDC / DHC 43
Operating modes to be
called up sequentially by
counterclockwise rotation of
rotary-push button
Operation
Touch key
¤
System temperatures; counter data to
be called up sequentially by clockwise
rotation of rotary-push button
Outside temperature
mean / actual
Program/Operating mode
Direct circuit/Pump status
Outside temperature
Min–Max (0:00–24:0 h)
Program/Operating mode
Mixer circuit 1/Pump status
Heat generator temperature
nominal / actual
Actuator
Mixer circuit 1/Status
Water heater temperature
nominal / actual
Program/Operating mode
Mixer circuit 2/Pump status
Flow temperature
nominal / actual
Actuator
Mixer circuit 2/Status
Flow temp. Mixer circuit 1
nominal / actual
Program/Operating mode
WW-circuit/Pump status
Flow temp. Mixer circuit 2
nominal / actual
Heat generator
Status
Variable input 1
nominal / actual
Pump direct circuit
Function/Status
Variable input 2
nominal / actual
Variable output 1
Function / Operating mode
Variable input 3
nominal / actual
Variable output 2
Function / Operating mode
Operating hours
Heat generator switch-ons
Manual exit:
Return to basic display at any time by touching information key ¤.
EN2H-0221GE51 R1105
24
Operation
5.1.2.7.1
SDC / DHC 43
Temperature indications
Information
Outside temp (1)
Display
Heat generator temp.
(1)
Heat generator temp.
(2)
Mean value/
Actual value
Min./max.-value
(0.00 bis 24.00
Mean value/
Actual value
Min./max.-value
(0.00 bis 24.00
setpoint/
actual value
setpoint/
actual value
Mixing circuit return
temperature
setpoint/
actual value
Outside temp (1)
Outside temp 2
Outside temp 2
Sec. flow temp. HG-FL,
distr. heating valve
setpoint/
actual value
External disable of
heatgenerator
Flue gas temperature
status
ON/OFF
Limit value/
Actual value
setpoint/
actual value
setpoint/
actual value
Loading status
ON/OFF
demand
ON/OFF
demand
ON/OFF
demand
ON/OFF
setpoint/
actual value
DHW temperature (2)
DHW temperature
controller
Heat demand via
switching contact (VI-1)
Heat demand via
switching contact (VI-2)
Heat demand via
switching contact (VI-3)
Flow temperature
Mixing circuit 1
Return temperature
Mixing circuit 1
Flow temperature
Mixing circuit 2
Return temperature
Mixing circuit 2
Room temperature
unmixed heating circuit
Room temperature
Mixing circuit 1
Room temperature
Mixing circuit 2
Thermostatic function
unmixed heating circuit
Thermostatic function
Mixing circuit 1
Thermostatic function
Mixing circuit 2
Temperature of
Solid fuel boiler
Buffer tank temperature
Solid-fuel boiler
AF conneted and
No fault indication
Variable input configured as AF2
1 appears only if BS 2 is used
Variable input configured as
BS2
BS 2 connected to variable input VI-1, VI-2 or VI-3
Return sensor connected and one of
the return control functions active
With district heating controllers
External HG-disable
(VE1-3) default
External contact connected to VI-1, VI-2 or VI-3
Variable input configured as AGF
1 appears only if DHWS-2 is used
Variable input configured as DHWS-2
Connected to variable input VI-1, VI-2 or VI-3
Thermostatic operation
Thermostat instead of sensor (only DHWS- 1)
VI configured as demand contact
External contact to variable input VI-1, VI-2 or VI-3
VI configured as outdoor sensor 2
External contact to variable input VI-1, VI-2 or VI-3
VI configured as outdoor sensor 2
External contact to variable input VI-1, VI-2 or VI-3
If there is a mixing circuit 1
If there is a mixing circuit 2
actual value t
Return temperature for low limit
control
THERMOSTAT MC-2
actual value
Connection only to variable input VI-1
If DHW function is enabeled
setpoint/
actual value
THERMOSTAT MC-1
RL-1/2 connected to corresponding variable input
1 or 2, used VI no longer selectable
With district heating controllers
Return temperature for high limit
control
THERMOSTAT HC
AF 2 connected to variable input VI-1, VI-2 or VI-3
If a heat generator is used
actual value
setpoint/
actual value
setpoint/
actual value
setpoint/
actual value
Remarks
AF2 conneted and
No fault indication
setpoint/
actual value
Return temp. HG-RT
distr. Heating valve
DHW temperature (1)
Display condition
If there is an unmixed heating circuit
If mixing circuit 1 is used
If mixing circuit 2 is used
Setpoint without room influence/ actual room
setpoint
Setpoint without room influence/ actual room
setpoint - Mixing circuit 1
Setpoint without room influence/ actual room
setpoint Mixing circuit 2
If there is a thermostatic function
OFF=temperature limit exceeded
If there is a thermostatic function
OFF=temperature limit exceeded
If there is a thermostatic function
OFF=temperature limit exceeded
VO1/2 configured as solid fiel pump
actual value
25
Connection to the corresponding variable input
1 or 2, used VI no longer selectable
Solid-fuel loading pump at variable output,
equivalent to KSPF or SFB depending on config.
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Information
Buffer tank temp. top
Buffer tank
temp.bottom
Solar panel-flow
temperature
Solar buffer tanktemperature
Solar panel-return
temperature
Solar storage
switchover temperature
5.1.2.7.2
Display
setpoint/
actual value
setpoint/
actual value
Display condition
VO1/2 configured as buffer loading
pump
VO1/2 configured as buffer loading
pump
VO1/2 configured as solar buffer
loading pump
VO1/2 configured as solar buffer
loading pump
VO1/2 configured as solar buffer
loading pump
actual value
actual value
actual value
actual value
Remarks
Connection to the corresponding variable input
1 or 2, used VI no longer selectable
Connection to the variable input VI-1, VI-2 or VI-3
Special sensor
Connection to the variable input VI-1, VI-2 or VI-3
Solar loading valve activated
Operating statuses
The request for operating statuses appears in the info menu after the sensor and setpoint information. The
following informations will be shown in the display depending on the controller type:
Information
Display
Display condition
Operating status
heating circuit
AUTO-P1
HC
ECO
ON
If there is an unmixed heating
circuit
Operating status
mixing circuit 1
AUTO-P1
MC-1
ECO
ON
If there is a mixed heating
circuit 1
Operating status
actuator MC-1
MIX.VALVE-1
Operating status
Mischerheizkreis 2
Operating status
actuator MC -2
Operating status
actuator district
heating
Operating status (St.
1) heat generator
P
AUTO-P1
MC-2
STO
Operating modes: holiday, absence, party, auto,
summer heating, red heating, standby
Time program: P1(P2,P3) mode: day, RED, ECO
Operating modes: holiday, absence, party, auto,
summer heating, red heating, standby
Time program: P1(P2,P3) mode: day, RED, ECO
Mixing valve 1 openes/closes or stops
ECO
ON
If there is a mixed heating
circuit 2
MIX.VALVE-2
OPEN/STOP/
CLOS
If there is a mixed heating
circuit 2
Mixing valve 2 openes/closes or stops
District heating valve openes,
closes or stops
With district heating
S
OPEN/STOP/CLO
HEAT GENER..
If there is a heat generator
ON/OFF
Operating status (St.
2) heat generator
HEAT GENER.
ST-2
ON/OFF
Operating status
modulating heat
generator.
MODULATION
57 %
60%
Operating status
DHW circuit
AUTO-P1
DHW
EN2H-0221GE51 R1105
If there is a mixed heating
circuit 1
Remarks
If there is a 2 stage heat
generator
If there is a modulating heat
generator
ECO
ON
If there is a DHW function
26
Operating modes: holiday, absence, party, auto,
summer heating, red heating, standby
Time program: P1(P2,P3) mode: day, RED, ECO
Info about the staged heat generator
Info about the switching status of ST2 of the heat
generator
Info about the modulating stage of the heat
generator actual value and setpoint in %
DHW Operating modes: holiday, absence, party,
auto, summer heating, red heating, standby
Time program: P1(P2,P3) mode: day, RED, ECO
Operation
Information
Function and status
of the
Unmixed heating
circuit pump
Function and status
of the
SDC / DHC 43
Display
Display condition
OUTPUT HC-P
EO
ON/OFF
OUTPUT VO-1
SOP
ON/OFF
Defined output
Defined output
Variable output 1
Function and status
of the
Variable output 2
OUTPUT VO-2
CIR.
ON/OFF
Volume flow district
heating valve
Heat power
District heating valve
Defined output
Remarks
Solar (SOP), Circulation (CIR.), electric heating
element (ELH), charging pump (CHP), boiler pump
(BCP-1,BCP-2), error output (EO), return bypass
pump (RBP), buffer loading pump(BULP), solid fuel
pump (SFP), heating circuit pump(HCP), constant
control (CC), timer (CLOCK)
Solar (SOP), Circulation (CIR.), electric heating
element (ELH), charging pump (CHP), boiler pump
(BCP-1,BCP-2), error output (EO), return bypass
pump (RBP), buffer loading pump(BULP), solid fuel
pump (SFP), heating circuit pump(HCP), constant
control (CC), timer (CLOCK))
Solar (SOP), Circulation (CIR.), electric heating
element (ELH), charging pump (CHP), boiler pump
(BCP-1,BCP-2), error output (EO), return bypass
pump (RBP), buffer loading pump(BULP), solid fuel
pump (SFP), heating circuit pump(HCP), constant
control (CC), timer (CLOCK)
If there is a heat meter
With district heating
If there is a heat meter
With district heating
Starts heat generator
(1)
STARTS
1275
If there is a heat generator
Info about heat generator starts (burner starts).
Operating hours heat
generator (1)
OPER. HOURS
280
If there is a heat generator
Info about heat generator operating hours
Starts heat generator
St.2
STARTS
530
ST-2
If there is a 2 stage heat
generator
Info about heat generator restarts (burner starts of
nd
2 stage).
Operating hours heat
generator St.2
OPER. HOURS
200
ST-2
If there is a 2 stage heat
generator
Info about heat generator operating hours stage 2
Test temperature for
measuring purpose
Operating status
ext. Switching
modem
INFO TEMP
50 °C
MODEM RED
KVT-sensor connected and VI
configured
VI configured as ext. Switching
modem
Independant test temperature, connected to the
variable input VI-1, VI-2 or VI-3
Operating modes depending on modem switsch:
AUTO (automatic) STBY (standby), HEAT
(heating), RED (reduced).
Switching status
display
Variable input 1
VARIABLE-1
Switching status
display
Variable input 2
VARIABLE-2
Switching status
display
Variable input 3
VARIABLE-3
Solar heat power
HEAT-POWER
…….kW
SOL
VO1/2 configured as solar
panel pump
Only with solar systems
Solar heat gain
HEAT-ENERGY …….
. kWh
SOL
VO1/2 configured as solar
panel pump
Only with solar systems
OFF
VI-1 configured as contact input
OFF
VI-2 configured as contact input
OFF
VI3 configured as contact input
27
Valid for: demand contact, ext. error input, burner
disable, flue gas thermostat, switching
modem, info input
Valid for: demand contact, ext. error input, burner
disable, flue gas thermostat, switching
modem, info input
Valid for: demand contact, ext. error input, burner
disable, flue gas thermostat, switching
modem, info input
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Information
Display
Display condition
Nr. of solar panel
pump starts
NR. OFSTARTS
…….
SOL
VO1/2 configured as solar
panel pump
Operating hours
Solar panel pump
OPER. HOURS
........
SOL
VO1/2 configured as solar
panel pump
Set Time for
Automatic Exit
Remarks
Only with solar systems
Buffer tank sensor BU 1 connected to a variable
input
1 or 2, occupied input no longer selectable
If the "information key" ¤ is pressed for approx. 3 s upon accessing the information
level, the INFO-TIME parameter appears.
This parameter determines the time for the automatic return to the basic display.
INFO-TIME
2.0
min
æ ç è é ê ë ì í
Setting range
OFF, 1 ... 60 min
OFF
No exit, the last information displayed remains constantly until the next
setting on the display.
1 ... 60 min Automatic exit from the information level after the specified time,
settable in 0.5 minute steps.
Factory setting
OFF
5.1.2.8 "Manual Mode" / "Emission Measurement" Key
5.1.2.8.1
"Manual Mode"
If the "manual mode" / "emission measurement" key is pressed for more than 5 s
while the basic display is visualized, the controller is switched to manual mode. In
this operating mode the heat generator temperature is set manually with the rotary
pushbutton î according to the desired setpoint. All the pumps are active, while the
available mixing valves are de-energized and can be actuated by hand.
MANUALMODE
38.0
oC
58.0
oc
æ ç è é ê ë ì í
NOTE!
The heat generator setpoint can be set from 38 to 80 °C and it flashes on the left
hand of the display, while the actual heat generator temperature is visualized
statically on the right hand of the display.
The switching differential corresponds to the set differential for automatic control and
is symmetrical to the setpoint.
The heat generator high limit prevails over the heat generator switching differential
and deactivates the heat generator in case it is exceeded.
Application
Controller malfunctions (emergency mode)
Breakdowns
Termination
The return to the last selected operating mode is carried out with the "manual mode"
/ "emission measurement" key or the "Operating mode" key ¢.
EN2H-0221GE51 R1105
28
Operation
5.1.2.8.2
SDC / DHC 43
Emission Measurement (Heating Controllers only)
CAUTION
Emission Measurement has to be carried out by a technician only.
By pressing "manual mode" / "emission measurement" key the heat generator runs
for 20 minutes at the set maximum temperature limit. The remaining time is
visualized as it passes.
Function
The direct heating circuit pump is activated, if the temperature in the heat generator
exceeds 65 ºC. Any existing mixing valves carry out the control upon demand.
Below 60 ºC the pump is blocked and existing mixing valves are closed.
The mixing circuit pumps remain continuously in function.
The DHW loading temperature remains continuously in function.
WARNING
5.2
Danger of scalding because the DHW temperature may exceed the defined
DHW setpoint.
Application
Emission measurement via the chimney sweep.
Termination
Emission measurement can be terminated in any moment in advance with the
"manual mode" / "emission measurement" key.
Parameter Input
By entering the technician parameter other setting options are enabled in the
parameter menus.
Parameter input:
- Parameter query by pressing simultaneously the ¥ und § keys
- Change the flashing number to the parameter.
- Confirm the right number.
- Return by pressing the information key.
- The default technician parameter is: 1234
- OEM parameter is _ _ _ _
5.3
Automatic exit time
When work with the control unit has finished, the unit automatically returns to basic
display after a factory-set time of 2 minutes. The exit time can be changed by
adjusting a system parameter (Par 11).
The exit time applies to keys ¢ £ ¥ ¦ and §, operation at selection level,
and code entering. For the exit time for key ¤ see page 21.
29
EN2H-0221GE51 R1105
SDC / DHC 43
5.4
Operation
Menu Selection
The controller has a parameter menu which varies according to the different
controller types.
Entry to the Parameter Menu Level
To enter the menu the rotary pushbutton î is to be pressed for approx. 3 s. The
parameter menu starts always with the time programs menu; all the other menus
available can be selected with the rotary pushbutton î. Press the rotary pushbutton
to enter the selected menu.
The menus and their function are described in the following:
EN2H-0221GE51 R1105
30
Operation
SDC / DHC 43
Solar
Solid
fuel
Buffer
Minimum
temperature
Minimum
temperature
Heating
system
Start up
protection
Max. limit flow
temp. set point
Switch off
differential
Switch off
differential
Maximum
temperature
Room
influence
Room
influence
Min. temperature limit
Minimum
valve travel
Pump ext.
running time
Solar panel
pump min.
running time
Room factor
Room factor
Maximum
temperature
limit
Controller gain
Solar panel
maximum limit
Temperature Integral action
limitimg mode
time
2
Year
Program
(P1/P2/P3)
DHW pump
output
Time program
Day for leg.
protection
Heating
system
Heating
system
3
DayWeekday
month (Mo ... Su)
Mixing circuit
1 (MC1)
output
Control mode
Time for leg.
protection
Room
influence
4
Chang
eover
Cycle
(1 ... 3)
Mixing circuit
2 (MC2)
output
Summer
Temperature
for legionella
protection
Room factor
5
Switch-on
Time
Heating circuit
pump (HC)
output
System frost
protection
temperature
Type of DHW
temperature
measurement
6
Switch-off
Time
Variable
output 1
Demand
DHW maxicontact modul mum temperafor VE1
ture limit
7
Temperarur
e
Variable
output 2
Demand
contact modul
for VE2
DHW
operating
mode
8
Demand
Variable input
contact modul
1
for VE3
Tank
discharge
protection
9
Variable input
2
Climate zone
Heat generator parallel
shift during
DHW loading
Room
thermostat
function
Room
thermostat
function
Room
thermostat
function
10
Variable input
3
Type of
building
DHW switching difference
Outdoor
temperature
assignment
Outside
temperature
assignment
Outside
temperature
assignment
11
Hot water
Indirect boiler
Automatic exit loading pump
return control
time
extented
via MC
running time
Constant
temperature
setpoint
Consant
temperature
setpoint
Consant
temperature
setpoint
Return limit
Enabling
district heating
mode stage II
valve
Volume flow
12
Anti-blocking
protection
Time program
circulation
pump
Minimum
temperature
limit
Minimum
temperature
limit
Minimum
temperature
limit
DHW loading
Calibration
mode stage
thermal output
1-2
Fluid density
13
Logical alarms
Economy
Max. temdisplay
interval (pulse) perature limit
Max. temperature limit
Max. temperature limit
Pre run. time
boiler pump
Calibration
volume flow
14
Economy
Automatic SetHeating circuit Heating circuit Heating circuit Ext. run. time
interval (period
function
parallel shift
parallel shift
parallel shift
boiler pump
duration)
Max. thermal
output
15
Password
16
Type code
Type of
Type of
Type of
reduced mode reduced mode reduced mode
Heat
generator
Malfunction
message 1
Outdoor
sensor
Maximum
temperature
Direct heating
circuit pump
Malfunction
message 2
Heat generator sensor
Switch on
difference
Boiler parallel
shift
Mixer circuit
pump 1
Malfunction
message 3
Domestic hot
water (DHW)
sensor
Switch off
difference
Buffer
switching
differential
Mixer actuator
1
Malfunction
message 4
Flow sensor
mixing circuit 1
(MC1)
Buffer
maximum limit
Forced
dissipation
Mixer circuit
pump 2
Malfunction
message 5
Flow sensor
mixing circuit 2
(MC2)
Solar
operating
mode
Ext. running
time switch on
differential
Mixer actuator
2
Reset the
malfunction
messages
Solar panel
sensor
District heating
valve 1
running time
Minimum
burner run
time
District heating
valve 2
running time
Ext. running
time switch off
differential
Hot water
loading pump
Buffer sensor
Max district
Room frost
Room frost
Room frost Burner switchheating return
protection limit protection limit protection limit
ing diff. I
temp. limit
Buffer start up
protection
Variable
output 1
Sensor
variable 1
(VE1)
Buffer
discharge
protection
Variable
output 2
Sensor
variable 2
(VE2)
Pump ext.
running time
Switch on
optimation
Pump ext.
running time
Switch on
optimation
Pump ext.
running time
Flexible district
Burner switch- heating return
ing diff. II
temp.
operation point
Time delay
stage II
Return temp.
limitation for
DHW loading
Heat balance
Sensor
variable 3
(VE3)
Reset heat
balance
Fluid heat
capacity
Ext. run. time Max. volume
charging pump
flow
Flue gas temp.
monitoring
Return temp. Flue gas temp.
limit
limit
...
24
Controller bus
adress
Sensor mode
Switch on
optimation
Return temp.
limit
17
Sensor
Calibration
DHW night
Malfunction
messages
Language
Relay
test
Hydraulic
diagram
Data
bus
Heating
circuit
(HC/MC/
DHW)
Mixing
circuit 2
Time
Mixing
circuit 1
1
Direct
heating
circuit
Domestic hot
water
Switch on
differential
System
parameter
Return
temperature
setpoint
Hydraulic
Parallel shift
Time
programs
Type
Date
Return
control
Service functions
District
heating
Parametrization
Heat
generator
Configuration
Parameter
Programing
End user
Heating
technician
Para Reset
OEM
31
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
5.4.1 Time-Date Menu
The following current date values can be set in this menu:
- Time
- Calendar year
- Calendar day – calendar month
- Time changeover mode (Summer - Wintertime)
All the listed values are preset at the factory and as a rule do not need to be
updated. If corrections are necessary in exceptional cases, the values can be
adjusted to the current conditions. An internal pre-programmed calendar provides for
automatic time changeover at the recurrent summer – winter changeover dates. If
necessary, the automatic time changeover can be deactivated.
The current weekday from Mon. to Sun. is determined from the calendar data and
requires no setting.
Entry
see 5.4 Menu Selection.
Modify
►
Select menu by pressing the rotary pushbutton î.
In the Date – Time menu, select desired calendar value (time, year, day-month,
change) by turning the rotary pushbutton î.
►
Press rotary pushbutton î and change value by turning the rotary pushbutton î.
►
Confirm value by pressing the rotary pushbutton î.
►
If desired, select further calendar values by turning the rotary pushbutton î and
change them.
►
Termination
In order to terminate and return to the basic display, press the "operating mode" key
¢ or wait the INFO-TIME set for automatic termination.
5.4.2 Time programs Menu
In this menu the time programs can be set individually for the heating and DHW
modes.The P1 standard program set at the factory (also P2 and P3, if enabled) for
each heating or DHW circuit can be overwritten with individual switching times and
temperature values. This is particularly useful if specific personalized heating
programs are to be created in case of periodically recurring events with varying
times (e.g. work shifts, etc.).
For the programming of the switching times a maximum of 3 heating cycles with their
own switch-on and switch-off times are available for each weekday. Each heating
cycle can be combined also with a freely selectable temperature setpoint.
IMPORTANT!
Entry
Termination
EN2H-0221GE51 R1105
The standard programs are not lost if they are overwritten with personalized
programs. Personalized programs will be deleted if the standard program is reloaded
and hence need to be created again. For this reason the personalized switch-on and
switch-off times as well as the temperature values should be entered in the tables
envisaged for this purpose.
see 5.4 Menu Selection.
In order to terminate and return to the basic display, press "operating mode" key
¢ or wait the INFO-TIME set for automatic termination.
32
Operation
SDC / DHC 43
5.4.2.1 Control Circuit Selection
After accessing the switching time menu the desired control circuits can selected
with the rotary pushbutton in the following sequence:
- Direct heating circuit
- Mixer heating circuit 1
- Mixer heating circuit 2
- Water heater circuit
(HC)
(MC-1)
(MC-2)
(DHW)
Access to the selected circuit is carried out by pressing the rotary pushbutton.
5.4.2.2 Program Selection
If switching time programs P2 and P3 were enabled (see System Parameter Menu /
Parameter 2- Time Program = P1 – P3), the program selection appears.
If switching time programs P2 and P3 are disabeled (System Parameter Menu /
Parameter 2- Time Program = P1), the program selection is skipped automatically.
5.4.2.3 Weekday and Cycle Selection
After selecting the program the first cycle of the first weekday (MON-1) appears as
well as the relevant section flashing in the upper time bar. The other cycles are set
by turning the rotary pushbutton clockwise in crescent order according to the cycles
and week day (e.g. MON-1, MON-2, MON-3, TUES-1, TUES-2, TUES-3, etc.), while
after setting these are to be selected by turning the rotary pushbutton counterclockwise and confirmed by pressing the rotary pushbutton.
5.4.2.4 Programming Switching Times and Cycle Temperatures
5.4.2.4.1
Switch-on Time
(= Start heating, or with enabled optimisation: start occupancy)
After selecting the weekday and the corresponding cycle the relevant switch-on time
starts to flash on the display and can be set with the rotary pushbutton. The time bar
in the upper part of the display provides an overview of all the programmed cycles
between 00:00 and 24:00 of the selected weekday.
IMPORTANT NOTE!
The switch-on time can not be set earlier than the switch-off timer of a previous cycle
(if available) and not earlier than 0:00 of the selected weekday.
When a setting of the switch-on time is made, the relevant time bar display on the
left is adjusted.
If the switch-on time coincides with the switch-off time, the relevant cycle is deleted.
A following cycle (if available) replaces automatically the deleted cycle when
acquired.
When adding subsequently an earlier cycle the relevant weekday needs to be
reprogrammed.
A flashing switch-on time is acquired by pressing the rotary pushbutton.
33
EN2H-0221GE51 R1105
SDC / DHC 43
5.4.2.4.2
Operation
Switch-off Time
(= End heating, or with enabled optimisation: end occupancy)
After acquiring the switch-on time the relevant switch-off time starts to flash on the
display and can be set immediately with the rotary pushbutton. The time bar in the
upper part of the display provides an overview of all the programmed cycles between
00:00 and 24:00 of the selected weekday.
IMPORTANT NOTE!
The switch-off time cannot be later than the switch-on time of a following cycle (if
available).
When a setting of the switch-off time is made, the relevant time bar display on the
right is adjusted.
If the switch-off time coincides with the switch-on time, the relevant cycle is deleted.
A following cycle (if available) replaces automatically the deleted cycle when
acquired.
When adding subsequently an earlier cycle the relevant weekday needs to be
reprogrammed.
A flashing switch-off time is acquired by pressing the rotary pushbutton.
5.4.2.4.3
Cycle Temperature
After acquiring the switch-off time the relevant cycle temperature starts to flash on
the display and can be set immediately with the rotary pushbutton. In the case of
heating circuits the displayed cycle temperature always refers to the desired room
temperature, while in the case of the DHW circuit it refers to the desired water heater
normal temperature in the selected cycle.
A flashing cycle temperature is acquired by pressing the rotary pushbutton.
At the same time the last cycle to be called starts to flash on the display so that it
can be checked. Further cycles can be selected directly subsequently and
processed in the following order: SWITCH-ON TIME – SWITCH-OFF TIME –
CYCLE TEMPERATURE.
EN2H-0221GE51 R1105
34
Operation
SDC / DHC 43
Switching time programming (Program P2 and P3 disabled)
When accessing the Parameter Menu level the time programming function appears.
BASIC DISPLAY
öî
press for approx. 3 s
TIME-CALENDAR
press
Heating circuit select
UNMIXED
CIRCUIT
MIXING CIRCUIT
1
Mixing CIRCUIT
2
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
Etc.
öî
UNMIXED
CIRCUIT
ð
SYSTEM
PARAMETER
TIME PROGRAMS
MENU – SELECTION LEVEL
DOMESTIC HOT
WATER
STANDARD
COPY HEATING
CIRCUITS
Example: direct heating circuit
press
Day & cycle
select
öî
MONDAY
heating cycle 1
ð
MONDAY
Heating cycle 2
Example: Monday cycle 1
press
Switch-on time change
change
SUNDAY
last heating cycle
COPY DAYS
öî
Controls
öî
TEMPERATURE
SETPOINT
ð
press
Day
Immediate return to the basic display with the
key
öî
Standard time Program P1
Heating circuit
Wed.– Thurs. –
Fri. – Sat.
It appears only if switching
nd
times are available in the 2
heating cycle!
öî
STOP HEATING
ð
press
Temperature
TUESDAY
Heating cycle 1
START HEATING
ð
press
Switch-off time change
MONDAY
Heating cycle 3
Heating Mode
from
to
unmixed
heating circuit
Mon.
– Sun.
6:00 – 22:00
DHW heating
circuit
Mon.
– Sun.
5:00 – 22:00
Mixing circuit
1/2
Mon.
– Sun.
6:00 – 22:00
¢ program
Standard Time Program (P1) for heating and DHW
Automatic heating and hot water operation
For each day of the week
35
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Switching time programming (Program P2 and P3 enabled)
When accessing the Parameter Menu level the time programming function appears.
Enabling of programs P2 and P3 in the SYSTEM PARAMETER menu (see Parameter Menu Level)
BASIC DISPLAY
press for approx. 3 s
TIME-CALENDAR
TIME PROGRAMS
press
Heating circuit select
MENU – SELECTION LEVEL
SYSTEM
PARAMETER
UNMIXED
CIRCUIT
Mixing CIRCUIT
1
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
öî
Return:
press for 3 sec.
Etc.
öî
UNMIXED
CIRCUIT
ð
öî
Mixing CIRCUIT
2
DOMESTIC HOT
WATER
STANDARD
COPY HEATING
CIRCUITS
Example: direct heating circuit
press
Program
select
öî
PROGRAM P1
ð
PROGRAM P2
PROGRAM P3
Example: Program 1
press
Day & cycle
select
öî
MONDAY
Heating cycle 1
ð
MONDAY
Heating cycle 2
MONDAY
Heating cycle 3
Example: Monday cycle 1
press
Switch-on time Change
Change
öî
Controls
öî
Immediate return to the basic display with the
key
öî
Standard Program P1
Heating
Mode
from
to
Standard Program P2
Heating
circuit
Heating circuit
Day
unmixed circuit
Mon. –
Sun.
6:00 – 22:00
unmixed circuit
Mon. –
Sun.
5:00 – 22:00
DHW heating
circuit
Mon. –
Sun.
6:00 – 22:00
Mixing circuit
1/2
Mixing circuit ½
COPY DAYS
TEMPERATURE
SETPOINT
ð
press
DHW heating
circuit
SUNDAY
Last heating cycle
It appears only if switching
nd
times are available in the 2
heating cycle!
öî
END HEATING
ð
press
Temperature
Wed.– Thurs.– Fri.
– Sat.
START HEATING
ð
press
Switch-off time Change
TUESDAY
Heating cycle 1
EN2H-0221GE51 R1105
Day
Mon. –
Thurs.
Fri.
Sat. – Sun.
Mon. –
Thurs.
Fri.
Sat. – Sun.
Mon. –
Thurs.
Fri.
Sat. – Sun.
36
Heating mode
from to from to
¢ program
Standard Program P3
Heating circuit
6:00-8:00 16:00-22:00
6:00-8:00 13:00-22:00
7:00-23:00
unmixed circuit
5:00-8:00 15:30-22:00
5:00-8:00 12:30-22:00
6:00-23:00
DHW heating
circuit
6:00-8:00 16:00-22:00
6:00-8:00 13:00-22:00
7:00-23:00
Mixing circuit 1/2
Day
Mon. –
Fri.
Sat. –
Sun.
Mon. –
Fri.
Sat. –
Sun.
Mon. –
Fri.
Sat. –
Sun.
Heating
Mode
from
to
7:00 – 18:00
reduced
6:00 – 18:00
reduced
7:00 – 18:00
reduced
Operation
5.4.2.4.4
SDC / DHC 43
Block Programming
5.4.2.4.4.1 Copying the Switching Time Programs (Days)
Block programming provides for the copying of switching times and cycle
temperatures of the weekday you choose:
1 – to a specific day of the week (Mon., Tues., Wed., ....Sun.)
2 – to all weekdays (Mon. through Fri.)
3 – to the weekend (Sat. – Sun.)
4 – to the whole week (Mon. – Sun.)
Calling the Copy Function (Days)
See also the ”Block programming” diagram
Source day
Target day
After the copy function is confirmed by pressing the rotary pushbutton, the flashing
source day (MON. - SUN.) to be copied is selected with the rotary pushbutton. The
relevant automatic program P1 (P2, P3) of the source day is shsown on the display
with the clock symbol and the program index.
After confirming the source day by pressing the rotary pushbutton, the target day
following the source day starts to flash on the display. By means of the rotary
pushbutton you can select
- the following single target days (MON-SUN);
- all the days of the week (1-7) as a weekly block;
- all working days (1-5) as a working day block;
- the weekend (6-7) as a weekend block;
and confirm by pressing the rotary pushbutton.
The copy function is confirmed with the confirmation message ”COPY DAY OK”.
After the confirmation the next target days appear automatically one after the other
by pressing the rotary pushbutton. These can be skipped or accepted if necessary.
The return to the basic display occurs by pressing the program selection key ¢.
NOTE!
Only complete days with all the cycles and temperature settings and the relevant
program can be copied.
5.4.2.4.4.2 Copying Switching Time Programs (heating circuits)
Block programming provides for the copying of all the switching times and the
temperature settings of one heating cycle to another.
Calling the Copy Function (Heating Circuits)
See also the ”Copying heating circuits” diagram
Source circuit
After confirming the copy function by pressing the rotary pushbutton, the flashing
source to be copied (DK, MK-1, MK2, WW) is selected with the rotary pushbutton.
If the automatic programs P1, P2 and P3 (see System Parameter Menu - Time
Program = P1-3) were enabled, the desired switching time program P1, P2 or P3 of
the source circuit can be selected. If these are not enabled, the program selection is
skipped.
37
EN2H-0221GE51 R1105
SDC / DHC 43
Target circuit
Operation
After confirming the source circuit by pressing the rotary pushbutton, the desired
target circuit can be selected according to the same procedure and, if enabled, the
desired program can be selected and confirmed.
The copy function is confirmed with the message ”COPY OK”. The copy function can
be called again to copy other circuits if necessary.
IMPORTANT NOTE!
Heating circuits cannot be copied to water heater circuits and vice versa because of
the different temperature settings. If a heating circuit (DK, MK-1, MK-2) is selected
as source circuit, the water heater circuit (WW) is excluded as target circuit.
A source water heater circuit can be a target and a source circuit at the same time.
In this case only switching time programs P1 - P3 can be copied between each
other.
The return to the basic display occurs by pressing the program selection key ¢.
EN2H-0221GE51 R1105
38
Operation
SDC / DHC 43
Block Programming
The copy function makes it possible to copy a source day to the desired target day or to all weekdays (week
programming). All the cycles of the source day are copied. Single heating cycles cannot be copied.
BASIC DISPLAY
press for approx. 3 s
TIME-CALENDAR
TIME PROGRAMS
press
Heating circuit select
ð
öî
MENU – SELECTION LEVEL
SYSTEM
PARAMETER
UNMIXED
CIRCUIT
Etc.
Mixing CIRCUIT
1
MIXNG CIRCUIT
2
DOMESTIC HOT
WATER
PROGRAM P2
PROGRAM P3
MONDAY
Heating cycle 2
MONDAY
Heating cycle 3
öî
Unmixed circuit
STANDARD
COPY HEATING
CIRCUITS
Wed.– Thurs.– Fri.
– Sat.
SUNDAY
Heating cycle 3
Example: Mixer circuit 2
press
öî
1)
Program
select
ð
PROGRAM P1
Example: Program 1
press
Copy function select
ð
öî
MONDAY
Heating cycle 1
TUESDAY
Heating cycle 1
COPY
Days/Week
Day/Week
copy functions
Example: Monday cycle 1
press
Source day
COPY
FROM
MON.
ð
select
öî
MON. – SUN.
E.g.: Monday
press
öî
Source day
1st target day
COPY MON.
TO
TUES.
ð
select
E.g.: Tuesday
Copy the source day to the 1st
target day
press
öî
COPY
Confirm
1st Target day or
1-7 (MON. – SUN.) or
1-5 (MON. – FRI.) or
6-7 (SAT. – SUN.)
Tuesday like Monday
2 sec.
Source day
2nd Target day
E.g.: Wednesday
COPY MON.
TO
WED.
ð
select
nd
2 target day
nd
Copy source day to the 2
day
target
Confirm
press
öî
COPY
Wednesday like
Monday
If necessary, select other
target days and transfer.
Quit
ö¢
Return
1)
The program selection is skipped if programs P2 and P3 are disabled in the
System parameter menu.
BASIC DISPLAY
39
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Copying Heating Circuits
NOTE!
Heating circuits cannot be copied to DHW circuits, as these have different cycle temperatures: if a heating circuit
is selected as a source circuit, the DHW circuit can no longer be used as a target circuit.
BASIC DISPLAY
press for approx. 3 s
TIME-CALENDAR
TIME PROGRAMS
Press
Copy function Select
ð
öî
MENU – SELECTION LEVEL
SYSTEM
PARAMETER
UNMIXED
CIRCUIT
Etc.
MIXING CIRCUIT
1
MIXING CIRCUIT
2
DOMESTIC HOT
WATER
öî
UNMIXED
CIRCUIT
STANDARD
COPY HEATING
CIRCUIT
Press
Source
circuit
Select
ð
SOURCE
CIRCUIT
SOURCE
CIRCUIT
SOURCE
CIRCUIT
HC
MC-1
MC-2
SOURCE
CIRCUIT
SOURCE
CIRCUIT
E.g.: direct heating circuit
Press
Program
circuit
Source
Select
ð
SOURCE
CIRCUIT
HC
P1
Press
Target
circuit
Select
ð
öî
HC
P2
HC
1)
P3
öî
TARGET
CIRCUIT
TARGET
CIRCUIT
TARGET
CIRCUIT
HC
MC-1
MC-2
TARGET
CIRCUIT
TARGET
CIRCUIT
E.g.: Mixer heating circuit 2 (MK-2)
Press
Program
circuit
Target
Select
ð
öî
TARGET
CIRCUIT
MC2
MC2
P1
P2
MC2
1)
P3
E.g.: Program P2
Copy
Confirm
Press
öî
COPY
Program P1 (direct heating circuit) =
Program P2 (mixer heating circuit 2)
-OK-
If necessary, copy other
heating circuits
Quit
ö¢ Return
BASIC DISPLAY
1)
The program selection for source and target circuits is skipped,
if programs P2 and P3 were disabled in the System Parameter
menu.
EN2H-0221GE51 R1105
40
öî
Operation
5.4.2.4.5
SDC / DHC 43
Reloading Standard Programs
See also the ”Reloading Standard Programs” diagram
Personalized switching time programs P1, P2 or P3 can be overwritten with the
standard switching time programs P1, P2 or P3 if necessary.
After accessing the Switching Time Menu ,the STANDARD TIME function within the
heating cycle selection must be chosen.
After confirming by pressing the rotary pushbutton, the circuit to be reset (HC, MC-1,
MC-2, ALL) starts to flash on the display.
If the automatic programs P1, P2 and P3 (see System Parameter Menu - Time
Program = P1-3) were enabled, the selected switching time program P1, P2 or P3 of
the circuit to be reset can be selected. If these are not enabled, the program
selection is skipped.
Resetting
The reset occurs simultaneously by keeping the rotary pushbutton pressed for
approx. 5 seconds, until the confirmation appears on the display.
The reset is confirmed by the message ”COPY OK”.
The STANDARD TIME function is called again by replacing the other circuits with
their relevant standard programs if necessary.
CAUTION
With the setting ALL, all the heating circuits and the hot water circuit regarding
the selected program will be overwritten with their standard switching times.
When overwriting, the personalized switching time programs are lost
definitively and need to be created all over again!
The return to the basic display occurs by pressing the program selection key ¢.
41
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Reloading Standard Programs
Switching time programs P2 and P3 disabled:
BASIC DISPLAY
Press for approx. 3 s
TIME-CALENDAR
TIME
PROGRAMS
Press
Standard
Select
ð
öî
MENU – SELECTION LEVEL
SYSTEM
PARAMETER
UNMIXED
CIRCUIT
Etc.
MIXING CIRCUIT
1
MIXING CIRCUIT
2
Domestic HOT
WATER
öî
unmixed CIRCUIT
Press
Heating
circuit
ð
Select
COPY
HEATING
CIRCUITS
STANDARD
öî
MIXING
CIRCUIT 1
UNMIXED
CIRCUIT
MIXING
CIRCUIT 1
PROGRAM P3
MC-1
MC-1
DOMESTIC HOT
WATER
ALL
DHW
E.g.: Mixer heating circuit 1
Press
Function
Call
ð
öî
RESET
MC-1
öî, until the confirmation -OK- appears.
press for approx. 5 s
Reset
RESET
MC-1
TIME-CALENDAR
Time programs
Press
Standard
Select
ð
!
The standard program was reloaded.
Personalized program is no longer available!
Switching time programs P2 and P3 enabled:
Basic display
Press for approx. 3 s
-OK-
öî
MENU – SELECTION LEVEL
SYSTEM
PARAMETER
unmixed CIRCUIT
Etc.
MIXing CIRCUIT
1
MIXing CIRCUIT
2
Domestic HOT
WATER
öî
Unmixed circuit
öî
Press
Heating
circuit
Select
ð
COPY HEATING
CIRCUITS
STANDARD
UNMIXED
CIRCUIT
HC
MIXING
CIRCUIT -1
P1
MC-1
P1
MIXING
CIRCUIT-1
PROGRAM P3
MC-1
P1
DOMESTIC HOT
WATER
DHW
E.g.: Mixing circuit 1
Press
Program
Call
ð
öî
RESET
RESET
MC-1
P1
MC-1
RESET
P2
MC-1
P3
E.g.: Program 3
press for approx. 5 s
Reset
RESET
MC-1
EN2H-0221GE51 R1105
42
-OK-
!
öî, until the confirmation -OK- appears.
The standard program P3 was reloaded.
Personalized program P3 is no longer available!
P1
ALL
Operation
SDC / DHC 43
5.4.3 System Parameter Menu
The parameters in this menu refer to general limit parameters and default values
within the heating system.
Entry
see 5.4 Menu Selection.
When work with the control unit has finished, the unit automatically returns to basic
display after a factory-set time of 2 minutes. The exit time can be changed by
adjusting a system parameter.
The exit time applies to keys ¢ £ ¥ ¦ and § operation at selection level,
and to code entering. For the exit time for key ¤ see page 20.
Exit
To return to the basic display directly, press the "operating mode" key ¢.
Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
5.4.3.1 Language Selection
Function
Factory setting
Several languages can be chosen for all the information appearing on the display.
GERMAN
Setting range
GERMAN, ENGLISH, FRENCH, ITALIAN (other languages are being prepared)
Setting value
1:
2:
3:
4:
GERMAN
ENGLISH
FRENCH
ITALIAN
5.4.3.2 Time Programs
Function
Factory setting
Setting range
Setting values
Effects
5.4.3.2.1
This parameter determines the enabling and disabling of the time programs for the
heating circuits. When supplied, only a single time program is enabled. The use of
only a single time program will simplify the operation.
P1
P1, P1-P3
P1:
P1-P3:
Program 1 enabled, Programs 2 and 3 = blocked
All three programs enabled
Besides the settings described above, the enabling of programs P1 to P3 provides
for the following additional setting options:
Operating Mode Setting
The time programs P1, P2 or P3 can be selected in the operating modes automatic
and summer.
43
EN2H-0221GE51 R1105
SDC / DHC 43
5.4.3.2.2
Operation
Time Programming
When programming, each heating circuit can be assigned one of the three time
programs P1-P3.
EN2H-0221GE51 R1105
44
Operation
SDC / DHC 43
5.4.3.3 Control Mode
Factory setting
Setting range
1
1, 2
This parameter determines the control mode and has effects on the:
- Operating mode selected with the "operating mode" key ¢
- Daytime temperature selected with the "daytime temperature" key ¥
- Nighttime temperature selected with the "night-time temperature" key ¦
with regard to the effect on the various heating circuits.
Setting values
1 The selected setting (operating mode, daytime temperature,
night-time temperature) applies for all the heating circuits equally.
2 Each heating circuit can be assigned its own setting (operating mode,
daytime temperature, night-time temperature).
5.4.3.3.1
Separate Daytime Temperature per heating circuit
Function
ROOM - DAY
DC
oc
æ ç è é ê ë ì í
20 °C
Setting range
5.4.3.3.2
5 ... 30 °C
Separate Night-time Room Temperature per heating circuit
Function
ROOM - NIGHT
DC
Setting:
Press the "daytime temperature" key ¥.
► Select the desired heating circuit, HC, MC-1 or MC-2, with the rotary
pushbutton î.
► Confirm the selected circuit by pressing the rotary pushbutton î.
► Set the flashing room temperature value by turning the rotary pushbutton î to the
desired value.
► Confirm the set value by pressing the "daytime temperature" key ¥ or the rotary
pushbutton î.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
►
20.0
▼
Factory setting
In control mode 2 the relevant setpoint applies only to the HC (= unmixed circuit),
MC 1 (= mixing circuit 1) or MC 2 (= mixing circuit 2)
16.0
▼
oc
æ ç è é ê ë ì í
In control mode 2 the relevant setpoint applies only to the HC (= unmixed circuit),
MC 1 (= mixing circuit 1) or MC 2 (= mixing circuit 2).
Setting:
► Press the "night-time temperature" key ¦.
► Select the desired heating circuit, HC, MC-1 or MC-2, with the rotary
pushbutton î.
► Confirm the selected circuit by pressing the rotary pushbutton î.
► Set the flashing room temperature value by turning the rotary pushbutton î to
the desired value.
► Confirm the set value by pressing the "night-time temperature" ¦ key or the
rotary pushbutton î.
► Alternatively the value can be acquired by automatic exit after approx. 60 s.
45
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Factory setting
Setting range
5.4.3.3.3
16 °C
5 ... 30 °C
Separate Operating Mode
Function
In control mode 2 the selected program applies only for the heating circuit specified
previously.
Hence each heating circuit can be assigned its own operating mode.
OP. MODE
MC 2
æ ç è é ê ë ì í
AUTOMATIC
MC 2
▼
æ ç è é ê ë ì í
Setting:
► Press the "operating mode" key ¢.
► Select the desired heating circuit, i.e. HC, MC-1 or MC-2, with the rotary
pushbutton î..
► Confirm the circuit by pressing the pushbutton î..
► Set the flashing operating mode by turning to the desired value.
► Confirm the set value by pressing the "operating mode" ¢ or the rotary
pushbutton î.
► In case of short-term operating modes (Holiday, Absence, Party) set the desired
target value by turning the rotary pushbutton î and confirm the set value as
described above.
► Alternatively the value can be acquired by automatic exit after the set INFO-TIME
(see 5.1.2.7 "System Information).
5.4.3.4 Summer Switch-off (heating limit)/ Heating Limit
Function
This parameter determines the end of the heating season on the basis of the outside
temperature according to the following criteria:
Rapid increase of the outside temperature
As long as the mean outside temperature is below the set value and the current
outside temperature is 2 K above the set value, the heating is stopped.
Slow increase of the outside temperature
The switch-off is enabled if the mean and actual outside temperature exceed the set
value.
Deactivating of the heating limit
The switch-off is disabeled if the mean and current outside temperature fall below
the set value plus 1 K.
The summer switch-off function is also deactivated:
• In case of an external sensor defect
• In case of active frost protection
NOTE!
EN2H-0221GE51 R1105
In case of switch-off phases (Standby Mode, Manual Summer Mode, Summer
Switch-off) lasting more than 24h, all the pumps are switched on to protect the
system against blocking owing to corrosion for 20 s every day and the mixing valves
are opened temporarily during this time.
46
Operation
SDC / DHC 43
In connection with a 2nd outside sensor the current mean outside temperature is
applied for the summer switch-off as long as the mean value of both sensors was
determined when assigning the external sensors. When the heating limit is active, it
is indicated on the basic display with an umbrella symbol.
Factory setting
Setting range
20 °C
OFF, 0,5 ... 40 °C
5.4.3.5 Parameter Reset
With the Parameter "RESET" you can restore the factory settings in case of settings
made by mistake in the parameter menus.
CAUTION
Reset is to be performed only if all the personalized set values are to be
replaced by the factory settings.
Settings:
With the flashing reset display PARAM.-RESET press the rotary pushbutton.
► The flashing reset ready indication (SET) appears.
► Press the rotary pushbutton for approx. 5 s.
►
In case of a reset, the confirmation RESET OK appears briefly, then -in order of
feedback- the first parameter in the relevant menu is called.
As soon as Parameter Set is finished, the unit returns to the first parameter of level
SYSTEM.
5.4.3.6 Full Reset
For a global reset of settings, a full reset can be performed at the unit.
The full reset is initiated by simultaneously pressing the keys ¢, ¥, ¦ and § until
the controller restarts.
47
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
5.4.4 Domestic Hot Water Menu
This menu comprises all the parameters necessary for the programming of the DHW
circuit with the exception of the DHW time program.
NOTE!
This menu can be called only if the heating technician has activated a DHW loading
pump or a DHW circulation pump.
5.4.4.1 DHW Economy Temperature
Function
Factory setting
Setting range
NOTE!
This parameter determines the temperature in the domestic hot water heater
between the heating cycles in automatic mode.
40 °C
10 °C ... DHW normal temperature setting
If a DHW thermostat is used to determine the water heater temperature, this
parameter is skipped.
5.4.4.2 Legionella Protection-Day
Factory setting
Setting range
Setting values
OFF
OFF, MON. to SUN., ALL
OFF:
The Legionella protection function is not active.
MON.- SUN: The Legionella protection is activated on the selected weekday at the
Legionella protection time set by the heating specialist with a different
parameter.
ALL:
NOTE!
The Legionella protection function is activated every day at the
Legionella protection time.
If a DHW thermostat is used to determine the water heater temperature, this
parameter is skipped.
5.4.5 Unmixed Circuit / Mixing Circuit 1 / Mixing Circuit 2 Menu
These menus comprise all the parameters necessary to program the heating circuits
with the exception of the time programs. A maximum of 1 unmixed circuit and 2
mixing circuits (mixing circuit 1 and mixing circuit 2) are available per controller as
heating circuits.
The heating circuit parameters described below are available for each heating circuit
and are to be set separately.
5.4.5.1 Reduced Mode
Function
Factory setting
EN2H-0221GE51 R1105
During reduced mode you can choose from two operating modes:
ECO
48
Operation
SDC / DHC 43
Setting range
Setting values
ECO, ABS
ABS (Reduced mode)
The direct heating circuit’s pump remains active during reduced mode (see Time
Program). The flow temperature is determined by the relevant reduced heating
characteristic according to the decreased room temperature. The temperature will
not fall below the set low limit.
Application:
Buildings with low insulation values and high heating losses.
ECO (Switch-off Mode)
During reduced mode the direct heating circuit is completely switched off in case of
outside temperatures exceeding the set frost protection limit. The heat generator
minimum temperature limit is deactivated. The heating circuit pump is switched off
with a short delay in order to avoid a safety switch-off owing to heat accumulation in
the heat generator (pump extended running time).
If the outside temperature falls below the specified frost protection limit, the controller
switches from switch-off mode (ECO) to reduced mode (ABS) and the heating circuit
temperature is adjusted according to the set reduced setpoint considering the low
limit of the heat generator.
Application:
IMPORTANT NOTE!
Buildings with high insulation values
The mode set here applies also for the operating modes: ABSENCE and
CONSTANT REDUCED operating modes.
5.4.5.2 Heating System
Function
This parameter refers to the type of heating system (floor-, radiator-, or convector
heating) and can be compared to the exponent of the relevant heat exchanger. The
setting determines the curvature of the heating characteristic of the unmixed circuit
and compensates the performance losses at low temperatures by means of its
progressive characteristic.
Depending on the type of heating system the following settings are recommended:
1.10
1.30
2.00
>3.00
Factory setting
Setting range
Slightly progressive heating characteristic for floor or other panel
heating systems.
Progressive standard characteristic for all radiator-heating systems with
m-values comprised between 1.25 and 1.35.
Progressive heating characteristic curves for convector and baseboard
heating systems.
Very progressive heating characteristic curves for general ventilator
application with high start temperatures.
1.30 (Radiator systems)
1.10 (Floor heating) for mixer circuits
1.00 ... 10.00
49
EN2H-0221GE51 R1105
SDC / DHC 43
5.5
Operation
Malfunction Messages
The controller has an extensive built-in malfunction reporting logic, which displays
with top priority the type of malfunction.
The malfunction messages alternate with the basic display as they appear. Several
malfunctions occurring at the same time will appear one after the other in the
temporal order in which they occur.
There are four different malfunction message categories:
Sensor malfunction messages
Sensor values beyond the measuring range are considered as interruptions or short
circuits. They appear with error codes 10 to 20 and index 0 for short circuits or 1 for
interruptions.
Heat generator malfunction messages
These malfunction messages analyse the current switching status. They appear with
error codes 30 to 40 and index 0, 1 or 2.
Logical malfunction messages
These malfunction messages refer to the expected controller function. They appear
with error codes 50 to 60 and index 0, 1 or 2.
Bus malfunction messages
These malfunction messages refer to the address errors such as double
assignments or the failure to recognize address settings within the data bus. They
appear with error code 70 and index 0 or 1.
IMPORTANT NOTE!
EN2H-0221GE51 R1105
The heating technician is to be informed of any error message.
50
Operation
5.6
SDC / DHC 43
Parameter Settings
5.6.1 Hydraulic Menu
The parameters in this menu refer to the general hydraulic system as well as to the functions and configuration of
the programmable inputs and outputs for the relevant system components. Instead of many single settings all
applications can only be defined with the 1st parameter of the setting table. Many applications are published with
this parameter. Applications not yet published are to be defined individually in the hydraulic menu.
Example: The controller must cover system no. 0202. Provided that the controller has enough relays, parameter 1
must be set to the value 0202.
Parameter
Description
Setting range / Setting value
Factory setting
01
02
Hydraulic diagram
DHW pump output
0
1
03
Mixing circuit 1 (MC1) output
04
05
Mixing circuit 2 (MC2) output
Heating circuit pump (HC) output
06
Variable output 1
07
Variable output 2
0, 0101, 0102, ... n
OFF
No function
1
DHW loading pump
4
DHW circulation pump
5
DHW electrical heating element
OFF
No function
2
Direct circuit (only pump output)
3
Mixing circuit 1 (OTC)
6
Mixing circuit 1 (as constant controller)
7
Mixing circuit 1 (as fixed value controller)
8
Mixing circuit 1 (as boiler return controller)
30
Continuous DHW control (district heating)
Setting range and assignment as parameter 03
OFF
No function
2
Direct circuit pump OTC
4
DHW circulation pump
5
DHW electrical heating element
6
Constant control
10
Charging pump
11
Boiler circuit pump 1
12
Boiler circuit pump 2
13
General malfunction
14
Timer
15
Solar loading pump (controller with variable
outputs only)
21
Parall. heat generator enable
27
Hydr. Buffer relief
OFF
No function
4
DHW circulation pump
5
DHW electrical heating element
9
Boiler bypass pump
10
Charging pump
11
Boiler circuit pump 1
12
Boiler circuit pump 2
13
General alarm output
15
Solar loading pump
16
Buffer loading or unloading pump
17
Solid fuel boiler pump
18
Unmixed storage tank loading pump
(DHC43-2/ DHC43-3)
19
Solar loading switch-over
20
Solar forced dissipation
21
Parall. heat generator enable
26
Primary pump
27
Hydr. Buffer relief
Setting range and assignment as parameter 06
51
Setting
3
3
2
OFF
OFF
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
Parameter
Description
Setting range / Setting value
Factory setting
08
Variable input 1
OFF
09
Variable input 2
10
Variable input 3
11
Indirect boiler return control via MC
OFF
No function
1
Outdoor sensor 2
2
Boiler sensor 2
3
DHW tank sensor 2
4
Buffer tank sensor 2
5
Demand contact
6
External alarm input
7
Return sensor for MC 1
8
Return sensor for MC 2
9
Retrurn sensor for bypass pump
10
External heat generator disable
11
External switching modem
12
External information
13
Common flow sensor
14
Solar panel return sensor
15
District heating sensor for unmixed DHW tank
16
Flue gas sensor
18
Solid-fuel buffer tank sensor
19
Buffer tank sensor 1
Setting range and assignment like parameter 08, but
without setting 16 (Flue gas sensor)
Setting range and assignment like paremeter 08, but
without setting16 (Flue gas sensor), 2 nd District
heating return sensor.
OFF, ON
EN2H-0221GE51 R1105
52
OFF
OFF
OFF
Setting
Operation
SDC / DHC 43
5.6.2 System Parameter Menu
The parameters in this menu refer to the general limit parameters and default values in the heating system to be
used.
Parameter
Description
LANGUAGE** Selection of the language
TIME
PROGRAM
CONTROL
MODE
Number of the enabled time
programs
Enabling of separate control
mode setting
SUMMER
06
Limit temperature for summer
switch off
System frost protection
temperature
Demand contact modul for VE1
07
08
09
10
Demand contact modul for VE2
Demand contact modul for VE3
Climate zone
Type of building
11
Automatic exit time
(Return time to basic display)
12
Anti-blocking protection
13
14
15*
Logical alarms display
Automatic Set-funktion
Password for heating specialist
16*
18
Typecode
Enabling cycle temperature
19
Frost protection mode
21*
23
24
RTC-Adjustment
Password for end user
Temperature display in
Fahrenheit
Parameter reset
05
PARA
RESET
Setting range / Setting values
Factory setting
1
2
3
4
P1
P1-P3
1
2
1
German
English
French
Italian
Only one time program enabled
Three switching time programs enabled
Common setting for all heating circuits
Individual setting for single heating
circuits
OFF
No function
10 ... 30 °C
OFF
No function
-20 ... +10 °C
1
Direct heating circuit (HC)
2
Mixing circuit 1 (MC1)
3
Mixing circuit 2 (MC2)
4
Domestic Hot Water
ALL
Complete controller
Settings see parameter 06
Settings see parameter 06
-20 ... 0 °C
1
Light construction
2
Medium construction
3
Heavy construction
OFF
No automatic return
0.5 ... 5 min Automatic return to the basic display
according to the set time
ON
Active
OFF
Not active
OFF, ON
OFF, ON
OFF Password disabled
0001 … 9999
Controller type as per typecode table
OFF
Cycle temperature disabled
ON
Cycle temperature enabled
OFF
Permanent frost protection as per
param. 5
0.5…60 min. cycle operation
-10 … 10 sec.
0000, …., 9999
OFF, ON
Setting
P1
1
20 °C
3 °C
1
1
1
-12 °C
2
OFF
ON
ON
OFF
1234
Type
ON
OF
0 sec.
OFF
OFF
*OEM
**Other controls offer additional language options.
53
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
5.6.3 Domestic Hot Water Parameter Menu (DHW)
This menu comprises all the parameters necessary for the programming of the DHW circuit with the exception of
the DHW switching time programs.
Parameter
Description
Setting range / Setting values
Factory setting
DHWNIGHT
LEGION.
PROT.
Hot water economy temperature
10 °C ... Hot water normal temperature
40 °C
Day for legionella protection
OFF
03
04
Time for legionella protection
Temperature for legionella
protection
Type of DHW temperature
measurement
OFF
No legionella protection
Mon ... Sun Legionelle protection on the
specified day
ALL
Legionella protection every weekday
0 ... 23 h
10 °C ... DHW max.
05
06
07
DHW maximum temperature limit
DHW operating mode
08
Tank discharge protection
09
Heat generator parallel shift during
DHW loading
10
DHW switching difference
11
12
Hot water loading pump extented
running time
Time program circulation pump
13
Economy interval ZKP
14
16
Economy interval (period duration)
Circulation pump
EN2H-0221GE51 R1105
1
2
DHW temperature sensor
DHW temperature controller (Thermostat)
02:00
65 °C
1
20 °C ... Hot water maximum temperature
1
Parallel mode
2
Priority mode
3
Conditional priority
4
Weather-responsive parallel mode
5
Priority mode with intermediate heating
6
Priority disable
7
External operation
8
Conditional parallel operation for MC
(DHC only)
OFF
No discharge protection
ON
Discharge protection activated
0 ... 50 K;
Difference between the DHW loading temperature
and the DHW setpoint
0 ... 20 K;
Amount of the DHW switching differential,
symmetric to the DHW setpoint
0 ... 60 min
65 °C
2
AUTO Active DHW time program
1
P1, direct heatimg circuit
2
P2, direct heatimg circuit
3
P3, direct heatimg circuit
4
P1, Mixing circuit 1
5
P2, Mixing circuit 1
6
P3, Mixing circuit 1
7
P1, Mixing circuit 2
8
P2, Mixing circuit 2
9
P3, Mixing circuit 2
10
P1, DHW circuit
11
P2, DHW circuit
12
P3, DHW circuit
0 min ... Setting parameter 14; ZKP running time
within Economy interval
10 ... 60 min
1 normal operation
2 switched off during HW- filling
AUTO
54
ON
15 K
5K
5 min
5 min
20 min
1
Setting
Operation
SDC / DHC 43
5.6.4 Direct Heating Circuit Menu
All the necessary parameters for the programming of the heating circuit are provided in this menu with the
exception of the switching time programs.
Parameter
Description
Setting range / Setting values
Factory setting
RED.
HEATING
HEAT
SYSTEM
03
Type of reduced mode
ECO
Heating system (exponent)
ECO Switch off mode
ABS
Reduced mode
1.00 ... 10.00
1,30
Room influence (with room unit)
OFF
OFF
1
2
3
04
Room factor
05
Adaptation heating curve
06
07
08
09
10
Switch on optimization
Heating limit
Room frost protection limit
Room thermostat function
Outdoor temperature assignment
11
Constant temperature setpoint
12
Minimum temperature limit
13
14
15
16
Maximum temperature limit
Heating circuit parallel shift
Pump extented running time
Screed function
23
24
only SDW20 Proportional band
only SDW20 Integral action time
Display heat generator temperature,
room sensor OFF, control operation
active
Display room temp., room sensor active,
operation active
Display room temp., room sensor active,
operation disabled
Display room temp., room sensor OFF,
control operation active
AUS,
10 ... 500 % influence active
RC
Room controller active
OFF, ON
OFF, 1 ... 8 h
OFF, 0,5 … 40 K
5 ... 30 °C
OFF, 1 ... 5 K
0
Control to mean value of AF 1 + AF 2
1
Control to AF 1
2
Control to AF 2
10 ... 95 °C only if output set at constant control
(CC)
10 °C ...
Maximum temperature limit (Parameter 13)
Minimum temperature limit (parameter 12) ... 95
0 ... 20 K
0 ... 60 min
OFF
1
Function heating
2
Heating function for floor covering
3
Heating function + heating function for
floor covering
1 … 50%/K
55
Setting
OFF
OFF
OFF
OFF
10
OFF
0
20 °C
20 °C
75 °C
0K
5 min
OFF
8 %/K
35 min
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
5.6.5 Mixing circuit 1 / Mixing circuit 2 Menus
All the necessary parameters for the programming of the mixing circuits are provided in these menus with the
exception of the switching time programs.
Parameter
Description
Setting range / Setting values
Factory setting
RED.
HEATING
HEAT
SYSTEM
03
Type of reduced mode
ECO
Heating system (exponent)
ECO Switch off mode
ABS
Reduced mode
1.00 ... 10.00
1,10
Room influence (with room unit)
OFF
OFF
1
2
3
04
Room factor
05
06
07
08
09
10
Adaptation heating curve
Switch on optimization
Heating limit
Room frost protection limit
Room thermostat function
Outside temperature assignment
11
Constant temperature setpoint
12
Minimum temperature limit
13
Maximum temperature limit
14
15
16
Heating circuit parallel shift
Pump extented running time
Screed function
17
18*
19*
20*
21*
22*
Return temperature limit
Proportional band XP
Mixing valve control sample rate Ta
Integral action time Tn
Actuator running time
End position function actuator
23
24
only SDW20
only SDW20
Display heat generator temperature,
room sensor OFF, operation active
Display room temperature, room sensor
active, operation active
Display room temperature, room sensor
active, operation disabled
Display room temperature, room sensor
OFF, operation active
0,
10 ... 500 % influence active
RC
Room controller active
OFF, ON
OFF, 1 ... 8 h
OFF, 0,5 … 40 K
5 ... 30 °C
OFF, 1 ... 5 K
0
Control to mean value AF 1 + AF 2
1
Control to AF 1
2
Control to AF 2
10 ... 95 °C;
Only if output set at constant control (CC)
10 °C ...
Maximum temperature limit (Parameter 13)
Setting Minimum temperature limit (parameter 12)
... WEZ parameter 30
0 ... 20 °C
0 ... 60 min.
OFF
1
Function heating
2
Heating function for floor covering
3
Function heating with + heating for floor
covering
10 ... 90 °C
1 ... 50 %/K
1 ... 600 sec.
1 ... 600 sec.
10 ... 600 sec.
1 Constant control signal in end position
2 Control signal suppressed in end position
(actuator without current)
1 … 50%/K
*OEM
EN2H-0221GE51 R1105
56
OFF
OFF
OFF
OFF
10 °C
OFF
0
20 °C
20 °C
75 °C
8 °C
5 min
OFF
90 °C
5.0 %/K
20 sec.
180 sec.
120 sec.
2
8 %/K
35 min
Setting
Operation
SDC / DHC 43
5.6.6 Heat Generator Menu
The parameters in this menu refer to the type of the relevant heat generator and to the corresponding specific
control functions.
Parameter
Description
Setting range / Setting values
Factory setting
01
Heat generator type
1
02
Heat generator start up protection
03
06
Heat Generator minimum
temperature limit
(not if parameter 01 = OFF)
Heat Generator maximum
temperature limit
(not if parameter 01 = OFF)
Heat generator temperature limiting
mode
(not if parameter 01 = OFF)
Heat generator sensor mode
OFF
1
2
3
4
OFF
1
2
3
5 °C ...
07
08
Minimum burner run time
Burner switching differential I
09
10
11
Burner switching differential II
(not if parameter 01 = 2)
Time delay stage II
Enabling mode stage II
12
DHW loading mode stage 1-2
13
Pre-running time boiler circuit pump
or parallel heat generator enabled
(only if set accordingly in the
Hydraulic menu)
Extended running time boiler pump
(only if set accordingly in the
Hydraulic menu)
Extended running time charging
pump (only if set accordingly in the
Hydraulic menu)
Flue gas temperature monitoring
(only if set accordingly in the
Hydraulic menu)
04
05
14
15
16
Without heat generator
Oil/Gas 1 stage
Oil/Gas 2 stage
Oil/Gas 2 x 1 stage
Modulating burner
No start-up protection
Unlimited start-up protection
weather-dependent start-up protection
Start-up protection separated
Maximum temperature limit
19*
20*
21*
22*
23*
24*
25
26
27
28
Flue gas temperature limit (only if
set accordingly in the Hydraulic
menu)
Modulation proportional band XP
Modulation sample rate Ta
Modulation integral action time Tn
Modulation running time
Modulation starting time
Modulation starting load
Outside temperature lock
(not if parameter 01 = OFF)
Base load offset
Min. temperature limit heating
circuits
Switching differential Minimum
temp limit heating circuits
38 °C
80 °C
1
Demand-responsive minimum limit
2
Conditional minimum limit
3
Permanent minimum limit
1
Burner switch off in case of defect
2
External burner switch off
3
Burner enabling in case of defect
0 ... 20 min
1 stage: 2 ... 30 K
2 stage: 2 ... (Burner switching differential II
–0.5 K)
(Burner switching differential I + 0,5) ... 30 K
1
0 ... 60 min (0 = 10 s)
1
Unlimited enabling during start up phase
2
Stage II is switched on according to the
set time delay (para. 10)
1
2-stage DHW loading with delayed
enabling of stage II
2
Unlimited 2-stage DHW loading
3
DHW loading only with stage I
0 ... 10 min
0 min
2
0 ... 60 min
2 min
0 ... 60 min
2 min
STB
17
ON
Minimum temperature limit ... Setting limitation
max. temperature heat generator (Par 30)
OFF
0 ... 60 min
Only display of flue gas temp.
Heat generator inhibited if limit is
exceeded for the set time
Heat generator inhibited if limit is
exceeded
1
2 min
6K
8K
1
0 min
OFF
50 ... 500 °C
200 °C
0.1 ... 50 %/K
1 ... 600 sec.
1 ... 600 sec./°C
5 ... 600 sec.
0 ... 240 sec.
0 ... 100 %
OFF, -20 ... 30 °C
5 %/K
20 sec.
180 sec./°C
12 sec.
60 sec.
70 %
OFF
0 ... 60 K
5°C ...KT-Min (only if Para02 = 3)
10 K
36 °C
2 K ... 20 K (only if Para02 = 3)
4K
57
Setting
EN2H-0221GE51 R1105
SDC / DHC 43
29
Heat generator forced dissipation
30*
OEM-max. temp. limitation
H-GEN.
RESET ST1
H-GEN
RESET ST2
Reset of burner starts and
operating hours stage 1
(not for parameter 01 = OFF)
Reset of burner starts and
operating hours stage 2
(not for parameter 01 = 2 or
01 = OFF)
EN2H-0221GE51 R1105
Operation
OFF
1
Dissipation into DHW tank
2
Dissipation into heating circuits
3
Dissipation into buffer tank
Minimum temperature limit … 110 °C
SET
SET
58
OFF
110 °C
Operation
SDC / DHC 43
5.6.7 District Heating Menu
The parameters in this menu refer to the type of the relevant district heating station and its corresponding control
functions.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03*
04
05
06
07*
08*
-10 ... 50 K
10 ... 130 °C
0 ... 50 %
0.1 ... 30 % / K
0 ... 60 min.
10 ... 1800 s
10 ... 1800 s
0 ... 100 °C
0,0 K
90.0 °C
10 %
5,0 %/K
3 min
120 sec.
30 sec.
90 °C
OFF, -20 ... 10 °C
OFF
0 ... 100 °C
90 °C
11*
Parallel shift
Max. limit flow temp. set point
Minimum valve travel
Controller gain
Integral action time
District heating valve 1 running time
District heating valve 2 running time
Max district heating return temp.
limit
(heating)
Flexible district heating return temp.
operation point
Return temp. limitation for DHW
loading
Return limit district heating valve
0
0
12*
13*
14*
15*
Calibration thermal output
Calibration volume flow
Max. thermal output
Max. volume flow
09*
10*
Temperature (codes 12 til 15 will not be
displayed)
1
Volume flow and temperature (codes 12
til 14 will not be displayed)
2
Thermal output and temperature (codes
13 til 15 will not be displaed)
1 ... 9999
1 ... 9999
1 ... 9999 kW
3
0.01 ... 99.99 m /h
Setting
1
1
9999 kW
3
99.99 m /h
*OEM
5.6.8 Return control Menu
The parameters in this menu refer to the special settings for the increase of the return temperature of heat
generators. Enabling occurs only following activation in the hydraulic menu tree.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
Return temperature setpoint
Switch off differential
Pump extented running time
10 ... 95 °C
2 ... 20 K
0 ... 60 min
20 °C
2K
1 min
Setting
5.6.9 Solar Menu
The parameters in this menu refer to the special settings for solar energy applications. Enabling occurs only
following activation in the hydraulic menu tree.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
04
05
06
Switch on differential
Switch off differential
Solar panel pump min. running time
Solar panel maximum limit
Buffer maximuml limit
Solar operating mode
10 K
5K
3 min
210 °C
75 °C
2
07
08
Heat generator temporary
interruption
(only if PARA 06=1)
Solar-priority/ parallel switchover
(Switch off differential + 3 K) ... 30 K
2 K ... (Switch on differential - 3 K)
0 ... 60 min
100 ... 210 °C
50 ... 110 °C
1
Priority mode
2
Parallel mode
OFF, 0.5 … 24 h
OFF, 1 … 30 K
OFF
09
Heat balance
OFF
10
Reset heat balance
OFF
No heat balance
1
Heat balancing with fixed volume flow
2
Heat balancing with pulse input
SET by pushing the rotary-push button
59
Setting
OFF
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
11
12
13
14
Volume flow
Fluid density
Fluid heat capacity
Switch-off temperature
0.0 ... 30 l/min. or l/ pulse
0.8 ... 1.2 kg/l
3.0 ... 5.0 KJ/kgK
OFF, 90 ... 210 °C
0,0
1.05 kg/l
3.6 KJ/kgK
210 °C
15
Checking cycle solar switchover
1 ... 60 min
10 min
16
Switch-over temperature
50 ... 110 °C
75 °C
5.6.10 Solid Fuel Menu
The parameters in this menu refer to the special settings regarding solid fuel control. Enabling occurs only following
activation in the hydraulic menu tree.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
04
05
Minimum temperature
Maximum temperature
Switch on difference
Switch off difference
Heat generator temporary
interruption
20 ... 80 °C
30 ... 100 °C
(Switch off difference +3 K) ... 20 K
2 K ... (Switch on difference -3 K)
OFF, 2 … 180 min
60 °C
90 °C
10 K
5K
OFF
Setting
5.6.11 Buffer Menu
The parameters in this menu refer to special settings regarding buffer loading. Enabling occurs only if duly
activated in the hydraulic menu tree.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
04
05
Minimum temperature
Maximum temperature
Boiler parallel shift
Buffer switching differential
Forced dissipation
20 °C
80 °C
8K
2K
OFF
06
1 K ... (Switch on differential – 2 K)
5K
08
Extended running time switch on
differential
Extended running time switch off
differential
Buffer start up protection
5 °C ... Maximum temperature
Minimum temperature ... 95 °C
-10 ... 50 K
1 ... 20 K
OFF
1
Into DHW tank
2
Into heating circuits
(Switch off differential + 2 K) ... 30 K
ON
09
Buffer discharge protection
10
Buffer tank operating mode
OFF
ON
OFF
ON
1
2
3
4
5
6
07
No start up protection
Start up protection active
No discharge protection
Discharge protection active
Charging control HC and DHW
Charging control HC without DHW
Discharge control HC and DHW
Discharge control HC without DHW
Charging control w. switchover DHW
Discharge control to heat generator
Setting
10 K
ON
1
5.6.12 Menu "Cascade"
The parameters in this menu refer exclusively to parameters associated with the cascading of several heat
generators. This selection can only be called up if several heat generators are available.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
05
06
Switching differential
Switch-on time delay
Switch-off time delay
Switchover load stages
Master stage
6.0 ... 30 K
0 ... 60 min
0 ... 60 min
OFF, 1... 240 h
1 ... [max. stages]
8K
2 min
2 min
OFF
1
EN2H-0221GE51 R1105
60
Setting
Operation
SDC / DHC 43
5.6.13 Data Bus Menu
The parameters in this menu refer exclusively to the parameters related to the data bus.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
Controller bus adress
Bus access level SDW 20 Direct
heating circuit
Bus access level SDW 20 Mixing
circuit 1
Bus access level SDW 20 Mixing
circuit 2
10, 20, 30, 40, 50
1
enhanced access level
2
basic access level
1
enhanced access level
2
basic access level
1
enhanced access level
2
basic access level
10
1
03
04
Setting
1
1
5.6.14 Relay Test Menu
In this menu the relays mounted in the central unit can be selected with the rotary pushbutton and their function
can be checked.
Parameter
Description
Setting range / Setting values
Factory setting
01
Heat generator test
02
03
04
05
06
07
08
09
Direct heating circuit pump test
Mixer circuit pump 1 test
Mixer actuator 1 test
Mixer circuit pump 2 test
Mixer actuator 2 test
Hot water loading pump test
Variable output 1 test
Variable output 2 test
Varying relay switching sequence according to
the set Heat generator
OFF-ON-OFFOFF-ON-OFFSTOP-OPEN-CLOSEOFF-ON-OFF
STOP-OPEN-CLOSEOFF-ON-OFFOFF-ON-OFFOFF-ON-OFF-
OFF
OFF
STOP
OFF
STOP
OFF
OFF
OFF
61
Setting
EN2H-0221GE51 R1105
SDC / DHC 43
Operation
5.6.15 Malfunction Messages Menu
In this menu any malfunction message that may appear on the controller is saved in 5-slot message memory.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
04
05
06*
Malfunction message 1
Malfunction message 2
Malfunction message 3
Malfunction message 4
Malfunction message 5
Reset the malfunction messages
Last malfunction message
Next to last malfunction message
Third to last malfunction message
Fourth to last malfunction message
Fifth to last malfunction message
SET
"Display"
"Display"
"Display"
"Display"
"Display"
-
Setting
*OEM
5.6.16 Sensor Calibration Menu
In this menu all the sensors connected to the central unit can be adjusted by ± 5 K compared to the factory
calibration value.
Parameter
Description
Setting range / Setting values
Factory setting
01
02
03
04
05
06
07
08
09
10
Outdoor sensor
Heat generator sensor
Domestic hot water (DHW) sensor
Flow sensor mixing circuit 1 (MC1)
Flow sensor mixing circuit 2 (MC2)
Solar panel sensor
Buffer sensor
Sensor variable 1 (VE1)
Sensor variable 2 (VE2)
Sensor variable 3 (VE3)
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
-5 ... +5 K
0K
0K
0K
0K
0K
0K
0K
0K
0K
0K
EN2H-0221GE51 R1105
62
Setting
Control Functions
SDC / DHC 43
6 Control Functions
6.1
Adjusting the hydraulic parameters
The parameter 1 of the Hydraulic menue defines an existing application. All
applications are so far listed in the design brochure for the smile controllers.
Individual adjustments can still be made with every single parameter.
Thus there is a flexible way either to use the preconfigured applications (very low
start up effort) or the much more flexible, individual adjustment in the parameter
menues.
CAUTION
Explanation
The hydraulic parameters define the system. Any change can have extensive
effectes on the function and efficiency. Please take care when you adjust
parameters manually for special applications.
Only the existing in- and outputs of the hardware will appear in the hydraulic menue.
The setting of the hydraulic parameters define the application.
Example:
PARAMETER 05 defines the output of the heating circuit pump. The default setting
is: heating circuit pump.
However this output can also be configured for e.g. the DHW circulation pump.
Of course the hydraulic setup must be corresponding.
Example:
The parameters for the circulation pump are only accessable if the HC pump output
has ben assigned for the circulation pump.
If a variable function requires an input value (sensor), then by force this will be
assigned at the matching variable input. This input can no longer be manually
changed.
If the user has defined a different input variable before, then this will be reset and
replaced.
Example:
The variable input has been assigned the 2nd outdoor sensor. The variable output 1
will now be a adjusted to the function of a buffer loading pump. The variable input 1
will then be automatically reset and then assigned to the buffer sensor, because this
information is vital for the control function.
63
EN2H-0221GE51 R1105
SDC / DHC 43
Control Functions
6.1.1 Connection and settings table
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
6.2
Function
Adjustable at
output
DHW loading
Direct heating circuit weatherdependent
Mixer heating circuit weatherdependent
Circulation pump
SLP
DKP, MK1,
MK2
MK1, MK2
Inputs
Optional
(VE1/2)
Comment
-----
Fixed sensor input
VF1, VF2
---
Fixed sensor input for respective mixer
heating circuit
---
---
---
---
VF1, VF2
---
Sensor for connection to MK
VF1, VF2
VF1, VF2
-----
---------
Sensor for connection to MK
---
---
---
---
---
---
--KVLF,
KSPF
PF
--KRLF (14)
SFS
SFB (18)
VO1, VO2
SSLP
---
VO1, VO2
VO1, VO2
SLVS
----
SLP, DKP,
VO1, VO2
Electrical heating element
SLP, DKP,
VO1, VO2
Constant control
DKP, MK1,
MK2
Fixed-value control
MK1, MK2
Boiler return control
MK1, MK2
Bypass pump (..VV..)
VO1, VO2
Charging pump
DKP, VO1,
VO2
Boiler circuit pump 1
DKP, VO1,
VO2
Boiler circuit pump 2
DKP, VO1,
VO2
Global malfunction message
DKP, VO1,
VO2
Timer
DKP
Solar pump (SDC 8-21,
DKP, VO1,
SDC 9-21, SDC 12-31, DHC 43-2) VO2
Buffer tank loading pump (SDC 8- VO1, VO2
21,
SDC 9-21, SDC 12-31, DHC 43-2)
Solid-fuel loading pump
VO1, VO2
Stratified storage loading pump
(DHC 43-2)
Solar loading valve
Solar forced dissipation valve
fixed
assignm
ent
SF
---
PF1 (19)
Return flow sensor option
Fixed assignment to VE if PLP is set to PF.
Otherwise, PF1 can be adjusted at free VE
(activation buffer management)
SFS in fix assignment to corresponding VE;
standard buffer tank sensor is KSPF;
separate solid-fuel buffer tank sensor SFB
can be configured (optional)
SLVS in DHW storage; KSPF in buffer
Switching Time Program Enabling
The Smile controllers have three separate switching time programs for each heating
circuit.
When supplied, only one switching time program is enabled. The use of only a single
switching time program for a wide range of applications makes it possible to simplify
operating.
See also
6.3
5.4.3.2 Time Programs
Suppressing the cycle temperature on Time program level
When programming switching times, the specialist can set a system parameter to
suppress the respective room or hot-water temperature for the cycle.
Function
Setting “ON“ causes the control of the respective circuit to be based on the cycle
temperatures stored in the switching cycles.
Setting “OFF”:
• All cycle temperatures are suppressed during switching time programming
EN2H-0221GE51 R1105
64
Control Functions
SDC / DHC 43
• Nominal room and DHW temperatures exclusively depending on daytime room
temperature or daytime water heater temperature
• All connected room devices react identically to parameter changes in the central
device
6.4
Enabling of Separate Control Mode
In order to make the operation as easy as possible for most of the applications, a
global control mode is set for all heating circuits when supplied. For those rare cases
in which a separate control modes are necessary (e. g. in case of separate control
mode selection for tenants and landlords) it must be enabled by means of the
”Control Mode” parameter in the ”System” menu.
Effect
Enabling
6.5
This parameter determines the control mode and has effects on the
• Operating mode selected with the program selection key ¢;
• Daytime temperature selected with the temperature selection key ¥;
• Night-time temperature selected with the temperature selection key ¦;
5.4.3.3 Control Mode
Temperature display in Fahrenheit
Apart from the °C (Celsius) temperature scale, the °F (Fahrenheit) scale is common
in the US and the UK. The conversion formula is:
T [° F ] =
T [°C ] * 9
+ 32
5
Every device in the control system can be switched separately to temperature
display in °F. The control system as such continues to operate in °C. The conversion
to °F only acts on the displayed temperatures.
The temperature display is in full degrees only (no decimals).
6.6
Selection of Hydraulic Parameter Presettings
Each controller type covers a specific hydraulic diagram in its ”as supplied”
condition. Depending on the configuration variants there is also the possibility of
adapting the system by means of further parameter settings to hydraulic diagrams
differing from the standard hydraulic system.
With parameter 01 in the ”Hydraulic” menu a preselection can be made from the
hydraulic schemes collection . The corresponding inputs and outputs are assigned
automatically according to the hydraulic diagram and can be altered if necessary.
The relevant system diagrams are available in a separate document.
See also
5.6 Parameter Settings
65
EN2H-0221GE51 R1105
SDC / DHC 43
6.7
Control Functions
The Variable Inputs and Outputs of the Smile controllers
FM – Description, VO setting options, VI setting options, VO-VI setting dependencies
Variable inputs
6.8
The selected functions can be assigned only once and are then no longer callable in
other variable inputs. If an input function is absolutely necessary for a corresponding
output function with regard to the variable outputs, no selection is possible.
General Functions and their Operation
6.8.1 Outside Temperature Measurement
6.8.1.1 Building Type
Function
Light Construction
This parameter takes into account the relevant building type by means of various
calculation methods for the determination of the outside temperature mean value
according to the setting.
The mean value is obtained over a period of 2 hours.
Application: wooden houses, lightweight brick buildings
Medium Construction
The mean value is obtained over a period of 8 hours.
Application: medium-weight masonry in hollow blocks or bricks
Heavy Construction
The mean value is obtained over a period of 24 hours.
Application: heavy masonry in tuff or natural stone
See also
Parameter settings 5.6.4 Direct Heating Circuit Menu and 5.6.5 Mixing circuit 1 /
Mixing circuit 2 Menus
6.8.2 Heating Circuit Outside Temperature Assignment
NOTE!
Function
Function active only when using a second outdoor sensor!
If in the central unit a second outdoor sensor (AF2) was connected to a variable
input, the heating circuit can be assigned at choice either to the external sensor 1, 2
or to the mean value of both sensors.
For each external sensor the following applies:
In case of a defect of one of the sensors, there is an automatic switchover to the
remaining outdoor sensor and a simultaneous malfunction message. In case of a
defect affecting both sensors the heating circuit is regulated on the basis of a set
heating characteristic curve and heating program corresponding to a fictitious
external temperature of 0 °C with regard to the set minimum temperature.
See also
EN2H-0221GE51 R1105
Parameter settings 5.6.4 Direct Heating Circuit Menu and 5.6.5 Mixing circuit 1 /
Mixing circuit 2 Menus
66
Control Functions
SDC / DHC 43
6.8.3 Climate Zone
Function
The climate zone is the coldest outside temperature value to be expected.
For the heat demand coverage this value is taken as the basis for the design of the
heating system.
This parameter defines the corresponding steepness value of the heating
characteristic of the heating circuit with regard to the climate zone.
See also
5.6.2 System Parameter Menu
6.8.4 Summer Switch-off
NOTE
This function is only effective in operating mode “Automatic”.
Function
For higher outside temperatures (normally above 20 °C) it makes no sense to keep
the heating on in the building. You can hence choose to switch-off the heating
depending on the outside temperature according to the following criteria:
Outside temperature rise
A switch-off is initiated when the mean outside temperature exceeds the set value.
T /°C
23,0
22,0
21,0
Set value
Einstellwert
20,0
-1 K
19,0
Aktuelle
Current
outside
temperature
Außentemperatur
18,0
17,0
16,0
Summer Switch-Off
Sommerabschaltung
ON
Ein
15,0
14,0
Mean-averaged
Gemittelteoutside
temperature
Außentemperatur
13,0
12,0
00:00
23:00
22:00
21:00
20:00
19:00
18:00
17:00
16:00
15:00
14:00
13:00
12:00
11:00
10:00
09:00
08:00
07:00
06:00
05:00
04:00
03:00
02:00
01:00
00:00
11,0
Switch-off reversal
The switch-off is reversed when the average outside temperature drops below the
set value by more than 1 K.
The summer switch-off function is disabled:
• when an outdoor sensor defect is detected
• when frost protection is active
67
EN2H-0221GE51 R1105
SDC / DHC 43
Control Functions
NOTE
The HEATING LIMIT parameter can be used to assist the summer switch-off
function during the transitional seasons. This function allows setting non-heating
periods on warm days for each individual heating circuit.
When a second outdoor sensor is used, summer switch-off is based on the actual
mean value of the two sensor readings, provided the mean value for the two sensors
was defined as the relevant figure in outdoor sensor allocation.
A parasol symbol in the basis display indicated that summer switch-off is active. If
the heating circuits are operated separately (system parameter “Operating mode”)
this symbol will be missing. If two outdoor sensors are connected to the system and
these two sensors were assigned to different heating circuits, the symbol will only be
displayed if both sensors fulfill the condition for summer switch-off.
See also
5.6.2 System Parameter Menu
6.8.5 System Frost Protection
Function
To avoid the freezing of the heating system in switch-off mode, the controler is
equipped with an electronic frost protection.
Operation without Room Temperature sensing
If the external temperature (current value) drops below the set limit, the heating is
turned on again. The heating is interrupted if the outside temperature exceeds the
set limit by 1 K.
Operating with Room Temperature sensing
As long as the room temperature is above the room setpoint, the heating circuit
pumps are running in case of outside temperatures below the set freezing limit.
If the room temperature drops below the set room setpoint, the heating is resumed.
The heating is switched off if the room temperature exceeds the set room target
value by 1 K. If at this moment the outside temperature is still below the freezing
limit, the heating circuit pumps remain active.
NOTE!
If not each heating circuit is operated with room temperature sensing, different frost
protection functions can be assigned to the single heating circuit. If, for example, a
mixing circuit is operated with room temperature sensing and the direct heating
circuit is not, the latter’s heating characteristic and room temperature setpoint are to
be set as low as possible.
In connection with a 2nd external sensor the frost protection function is activated, as
soon as one of the two outside temperatures drops below the frost protection limit.
In case of a faulty outdoor sensor the frost protection is constantly activated.
CAUTION
See also
EN2H-0221GE51 R1105
In connection with a room sensor the thermostat function is not active with
active frost protection.
5.6.2 System Parameter Menu
68
Control Functions
SDC / DHC 43
Cycle Operation
The frost protection function is activated as soon as the temperature drops below the
set frost protection limit (SYSTEM-PARAMETER 05). The frost protection function
becomes effective when frost protection is active and there is no request for the
heating circuit.
• With the frost protection setting “Cycle operation”, there is no continuous request
for the heat generator, in contrast to continuous operation.
• With the system frost protection active, the heating circuit pumps are switched on
and the mixer valves closed.
• As long as the measured flow temperature of the mixer circuits or the heat
generator temperature in the direct heating circuit, respectively, does not drop
below the set nominal room temperature (RTFrost or RTNight), no demand value is
posted to the heat generator.
• When the flow temperature drops below the set nominal room temperature,
heating is activated.
• Once the nominal flow temperature has reached the nominal room temperature
and the set time (SYSTEM-PARAMETER 19) has passed, the demand value
to the heat generator is retracted and the mixer valve closes while the pumps
continue running.
• If no data are detected from the outdoor sensor (e.g. because the sensor is
defective), only the pumps are switched on while heating is disabled.
• The set minimum and maximum limits are taken into account in heating
operation.
• When the heat generator is activated, the set start-up protection conditions of the
heat generator are applied. This can mean that the heating circuit pumps are
switched off temporarily.
Frost protection function in case of heat generator fault
If system malfunction message 30-3 or 31-3 occur (e.g. switch-on failure of the
burner(s) due to fuel shortage burner malfunction), priority pump switch-off functions
such as boiler start-up protection, hot-water priority etc. are disabled if frost
protection is active.
The heating water circulated in the heating circuits adopts the overall mean room
temperature and reduces or delays any freezing.
6.8.6 Anti-blocking Protection
Function
See also
With this function activated all the pumps are switched on every day for approx.
20 seconds to protect against blocking owing to corrosion in case of long switch-off
periods (> 24h) and the mixers are opened temporarily during this period.
5.6.2 System Parameter Menu
69
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
SDC / DHC 43
7 Hydraulic Components and their Functions
7.1
Heat Generatior: Boiler
7.1.1 Heat Generator Start-up Protection
The start-up protection function prevents condensate precipitation when heating up
from cold.
Function
There are three different modes of start-up protection that can be set:
Unlimited start-up protection
When the temperature in the heat generator drops to 2 K below the set minimal limit,
all heating circuits are separated, at the water side, from the heat generator (pumps
off , mixers closed) to pass through the dew point as quickly as possible. The
heating circuits are enabled as soon as the temperature in the heat generator has
reached the minimum limit plus half of the burner switching differential 1.
Weather-dependent start-up protection
The heating-up characteristic is the same as for unlimited start-up protection,
meaning the heat generator remains in operation until the set minimum temperature
plus half of burner switching differential 1 is crossed. Below the minimum
temperature the pumps remain switched off and the mixers closed.
Once the heat generator has been switched off, the start-up protection becomes
active again only when the heat generator temperature drops below the weatherresponsive demand value (acc. to heating curve setting and nominal room setting).
The subsequent heating-up follows the same scheme as for unlimited start-up
protection. The result is a mean value depending on the difference between the
weather-responsive demand value and the minimum limit setting. This mean value
will be significantly lower than the value set for a heat generator operated with a
permanent minimum temperature limit.
Separate start-up protection for heat generator and heating circuits
This function allows separating the temperatures for switching on the burner and
switching off the heating circuit when the boiler temperature falls below the boiler
minimum temperature limit.
See also
5.6.6 Heat Generator Menu
7.1.2 Heat Generator Minimum Temperature Limit
Function
In order to protect the heat generator against agressive condensate the minimum
temperature limit documented by the manufacturer of the heat generator is to be set.
The heat generator switches on when the temperature falls below the set value,
while it switches off when the set value plus the burner switching differential is
exceeded. During heating the limit temperature will be maintained.
This setting is used only for the reaction of the heat generator (burner) to reaching
the set minimum temperature ( KTmin −WEZ ). The function for the heat generator
remains unchanged.
The mode of operation of the set limit is defined via the heat generator parameter
“Heat generator start-up protection”.
EN2H-0221GE51 R1105
70
SDC / DHC 43
Hydraulic Components and their Functions
There are three different modes of operation for the minimum temperature limit:
Demand-responsive minimum limit
As long as there is no demand from heating or hot water, the boiler remains
switched off. The minimum limit is disabled. The burner is switched on and the heat
generator is heated up to the set minimum temperature limit as soon as the
temperature in the heat generator drops below the fixed heat generator frost
protection temperature of +5°C.
Conditional minimum limit
The boiler minimum temperature acts as the lower limit, which will be maintained
even if there is no demand. The boiler is switched off only if Summer switch-off is
active.
Permanent minimum limit
The boiler temperature is maintained according to the set minimum temperature,
independent of demands or deactivating operating modes.
See also
5.6.6 Heat Generator Menu
7.1.3 Heat Generator Maximum Temperature Limit
Function
In order to protect the heat generator against overheating, the controller is equipped
with an electronic maximum temperature limit. It shuts off the burner if the
temperature in the heat generator exceeds the limit value.
The burner is switched on again if the temperature in the heat generator falls below
the limit value by half of the burner switching differential plus 2 K.
See also
5.6.6 Heat Generator Menu
7.1.4 Heating circuits minimum temperature limit
• If the boiler temperature KTact <= parameter 27 (KTmin-HK), the heating circuit
pumps (DKP, SLP, MKP) are switched off and the mixer valves are closed.
• The heating circuit pumps and mixer valves are enabled again as soon as KTact>
KTmin-HK + SKmin-HK is fulfilled.
7.1.5 Heat Generator Sensor Operating Modes
Function
There are various ways in which the heat generator can react to a malfunction of the
heat generator sensor:
Burner switch-off in case of a faulty heat generator sensor
A message appears in case of a short circuit or the break of the sensor; the burner
will be switched off.
External burner switch-off
In case of the interruption of the sensor the burner is switched off without a
malfunction message. Application for example as external burner switch-off or
enabling in case of the interruption of the heat generator sensor.
71
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
CAUTION
SDC / DHC 43
Only Ag (hard silver), Au (gold) or Ni (nickel) are to be used for the contacts.
In case of a sensor short circuit a relevant malfunction message appears and the
burner is blocked.
Burner enabling in case of a faulty heat generator sensor
A message appears in case of a short circuit or the break of the sensor and the
burner is enabled without limitations.
The control of the heat generator is carried out only manually by means of the
mechanical boiler temperature controller (boiler thermostat) on the boiler panel
according to the set value.
CAUTION
See also
This activation is only permitted if there is a boiler thermostat in the burner
circuit. In the other case there is the danger of boiler overheating!
5.6.6 Heat Generator Menu
7.1.6 Minimum Burner Run time
Function
NOTE!
See also
This function extends the burner run times and reduces the standby losses. After
starting the burner at least this time is to elapse before the burner is deactivated
again (regardless of the temperature increase).
If the temperature in the heat generator exceeds the set heat generator maximum
temperature limit, the minimum burner run time is stopped and the burner is
switched off in advance.
5.6.6 Heat Generator Menu
7.1.7 Multi-stage Heat Generator/ Switching Differential
Function
The control unit offers independently adjustable switching differentials with reference
to the same nominal value.
Switching differential I
Switching differential I controls the heat generator capacity required according to
load and demand by switching on and off the stage required for the actual heat
demand within the set range. The switching is initiated symmetrically to the nominal
value within half of the absolute value of the switching differential.
Switching differential II
Switching differential II (only two-stage heat generator and heat generator 2 x singlestage) determines how many stages are required to meet the actual heat demand
(partial load - stage I, full load - stage II). This switching differential is overlaid
symmetrically on switching differential I and must always be set to higher values.
NOTE
EN2H-0221GE51 R1105
In Cascade mode this setting would be superseded by the cascade setting and is
therefore not available.
72
SDC / DHC 43
Hydraulic Components and their Functions
Mode of operation with switching differential II
• When the heat generator temperature is below switching differential II, stage I is
switched on without delay. Stage II is enabled after stage II delay has passed
(see heat generator parameters, page 61).
• Stage II is switched off as soon as the heat generator reaches the set nominal
temperature plus half of switching differential I.
• Stage II is switched on again when the heat generator temperature drops below
the set nominal temperature minus half of switching differential I.
• Stage I is switched off when the heat generator temperature exceeds the set
nominal value plus half of switching differential II.
Boiler temperature
Kesseltemperatur
Combined operation for 2-stage heat generators
• As long as just one stage can meet the heat demand (stage II inactive), stage I is
switched according to switching differential I.
• As soon as stage 2 is needed to meet the heat demand, switching differential I
takes over the switching on and off of stage II and switching differential II takes
over the switching of stage I.
1)1)
Temperaturabfall
wird nach
Abschalten
Stufe II langsamer,
daI Ssupport
tufe I stützt
Slower temperature
drop jedem
after each
stage IIder
switch-off,
due to stage
2)2)
Einsch
altlinie Studrop
fe IIbelow
wird nicht
mehr erre
ichstage
t, Temperatur
wird vonmaintained
Stufe I erbrach
t.
Temperature
switch-on
level
II; temperature
by stage
I
3)3)
Temperatur
fällt drop
durchbelow
erhöhte
Wärmeanforderung
altlinie Sheat
tufe II.
Temperature
switch-on
level stage unter
II, dueEinsch
to increased
demand
Swap
of SD
Vertauschen
Switch-off level stage I
Swap
of SD
Ve
rtauschen
der SD
der SD
Ausschaltlinie Stufe I
Switch-off
Ausschallevel
tlinistage
e StufIIe
II
Switch-off
Ausschallevel
tlinistage
e StufIe
Switch-off level stage II
Aussch
altlinie Stufe II
Ausschalevel
ltlini
e StuIfe I
Switch-off
stage
Switch-off
stage
Ausschallevel
tlinie
StufIIe
I
II
Nominal temp.
Sollwert
1)
Switch-on
Einschallevel
tlinistage
e StufIIe
II
Switch-off
level
Ie
Einschal
tlinistage
e Stuf
Ii
3)
2)
Switch-on level stage I
Einschaltlinie Stufe Ii
Switch-on level stage II
Einschaltlinie Stufe II
II
Einschaltlinie Stufe Ii
Domain
1
Bereich 1
Domain
Bere
ich 22
Domain
Bere
ich 33
Hohe
HighAbnahme
demand (Anfahren)
(start-up)
Heat supply full
W ärmedeckung
mitload
Volllast
(burner stages I and II)
(Brennerstufe I und II)
geringe
Abnahme
low demand
Heat supply partial
load
W ärmedeckung
mit Te
illast
(burner stage I only)
(nur Brennerstufe I)
IncreasedAbnahme
demand
erhöhte
Heat supplymit
full load
W ärmedeckung
Volllast
(both burner stages)
(beide Brennerstufen)
altliIInie Stufe
Switch-onEinsch
level stage
Theoretical
curve
for stage
only allein
Theoretischer
Verlauf
mit IStufeI
Time
Zeit
73
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
Time delay stage II
NOTE
Enabling mode stage II
SDC / DHC 43
Enabling of stage II (full load) is controlled not only by the switching differentials but
also by a time delay. In this way stage II remains disabled for the set delay so that
stage I will be active for longer. This function is only effective during the start-up
phase (when there is demand for both stages). When stage I is in base-load
operation and stage II in adjustment operation (covering excess heat demand), the
latter is switched on immediately when the demand arises.
In Cascade mode, this setting would be superseded by the cascade setting and is
therefore not available.
The parameter “Enabling mode stage II” allows changing the effect of a Time delay
stage II setting during the start-up phase below the heat generator minimum
temperature limit.
Unlimited enabling during start-up phase
Both stages are in unlimited operating during start-up.
Time delay during start-up phase
Stage II is switched on after the set time delay acc. to Time delay stage II:
NOTE
DHW loading mode stage II
In Cascade mode, this setting would be superseded by the cascade setting and is
therefore not available.
The function DHW LOADING MODE STAGE 1-2 allows defining the loading mode
for the hot-water heater with 2-stage or 2 x single-stage heat generators. The
following options are available:
• 2-stage loading with delayed enabling of stage II acc. to Time delay stage II
• Unlimited 2-stage DHW loading
• DHW loading with stage I only; stage II disabled
NOTE
See also
In Cascade mode, this setting would be superseded by the cascade setting and is
therefore not available.
5.6.6 Heat Generator
Outside temperature disable When the actual outdoors temperature exceeds the set limit, all request to the heat
generator are disabled within a device. The heating circuits continue operating, but
the heat generator will not be switched on. Preset minimum burner running times are
fulfilled. Only when the outside temperature drops to the AT-disable level minus 2K,
the heat generator is enabled again. If several heat generators are controlled though
one device (condensing burners, 2-stage burners), all stages of the device will be
disabled.
Base load offset
This setting becomes effective only if several heat generators are operated in
cascade mode.
Burner stages operating as base load are given a higher nominal temperature than
the modulating stage, which is switched on last. This higher value is composed of
the set nominal temperature plus the set base load offset. If several heat generators
are switched though one control, the setting applies to every heat generator.
Heat generator reset
EN2H-0221GE51 R1105
With 2-stage heat generators, the counters for operating hours and burner starts
(see Info menu, page 49) Can be reset separately for stage 1 (ST-1) and stage 2
(ST-2).
74
SDC / DHC 43
Hydraulic Components and their Functions
Reset
With the reset indicator flashing (RUECKSETZEN), the reset-ready indicator (
)
will flash when the rotary-push button is pressed briefly. A reset will be performed
when the rotary-push button is pressed for approx. 5 seconds.
Once the parameter settings have been reset, the device will jump back to the first
parameter on menu level WAERMEERZ.
7.1.8 Switching for modulating burners
Modulating burners are controlled in a way similar to mixer control, through a PI
control algorithm, since in this case an actuator integrated in the burner regulates the
air/fuel ration according to the heating power. However, in contrast to the control of
conventional burners, control of modulating burners is subject to the following
criteria:
Switching differential
In contrast to conventional ON/OFF burner control systems with their switching
differentials symmetrical around the respective nominal temperature, the switching
differential for modulating burners is an asymmetric interval with the switch-on level
always 1K below the nominal temperature. This offers the advantage that, in case of a
possible overshoot through the P-band, the burner is not switched off, because the
switch-off point lies above the nominal value by a wider margin than the switch-on
point is below the nominal value (overshoot reserve). Also, when the heat demand is
low (especially in the low-load regime) the temperature will drop only slightly since the
burner is switched on again as soon as there is a deviation of more than 1 K.
Example:
Set nominal temperature = 50 K
Switching differential = 6 K
Switch-on at (50°C - 1K) = 49 °C
Switch-off at (49°C + 6K) = 55°C
Deviation (K)
Switch-off level
Nominal level
Switch-on level
Activation of modulation
Adjustment
Minimum burner run time
The modulating burner stage is activated when the heat generator temperature has
dropped below the set nominal temperature by more than 1K. The burner is enabled
through the burner relay. As soon as the heat generator temperature crosses the
switch-off level the burner is deactivated. In contrast to the mixer parameters.
Adjustment to the nominal temperature is realized through the conventional 2-point
output (activating the burner) and an additional 3-point output for modulating the
actuator in the burner. The temperature is registered by the heat generator sensor.
In contrast to mixer control, no end position function is assigned to this actuator. The
control mechanism is running continuously.
Independent of temperature-related switch-off conditions, the burner is kept running
for the duration of the set minimum burner run time.
75
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
Minimum and maximum
temperature limitation
SDC / DHC 43
The same functions as for conventional heat generators apply when the heat
generator maximum temperature is exceeded or the heat generator minimum
temperature is undershot.
7.1.9 Modulation P-band (Xp)
Function
When the nominal temperature changes abruptly, the proportional band Xp
determines the appropriate readjustment of the respective actuator in the burner
according to the new setpoint.
Example
At a maximum heat generator temperature of 70°C, the actuator in the modulating
must cover a temperature difference of 50K (based on a room temperature of 20°C).
This corresponds to a temperature deviation of 100 %, meaning that the setting is
calculated as follows:
Xp (%)/K x 50K = 100 % or Xp = 2 %/K
7.1.10 Modulation sample time Ta
The sample time is a controller setting that defines the time interval between two
subsequent actuator pulses when a deviation is detected. Shorter sample times
result in finer adjustment.
7.1.11 Modulation integral action time Tn
The integral action time (= reset time) determines the dynamic behavior of the
controller and thus the time needed by the controller to adjust for a detected
deviation from the nominal setting. The reset time is constant, independent of the
size of the deviation.
7.1.12 Modulation running time
This function allows adjusting the actuator, with regard to its finite running time, to
the control characteristics, meaning that actuators with different running times react
to the same deviation by readjusting by the same amount through adapting the
action times. The integral action time Tn remains unchanged in this. However, care
must be taken that the latter must always exceed the running time of the respective
actuator.
7.1.13 Modulation starting time
The starting time parameter determines the length of the start-up phase in
modulation mode so that a stable start-up is ensured. As soon as the set starting
time has expired, the modulation switches to its normal control characteristics
defined by the modulation parameters.
EN2H-0221GE51 R1105
76
SDC / DHC 43
Hydraulic Components and their Functions
7.1.14 Modulation starting load
The starting load parameter determines a percentage setting for a fraction of the
modulation running time during the start-up phase. With a setting of 0% the actuator
valve remains always closed. After the set starting time the modulation switches to
its normal control characteristics defined by the modulation parameters.
Starting
(%)
Staload
rtleist
ung (%)
Modulation
Modulation
100%
Auf-/ Abwärtsmodulation
70%
je nach Regelabweichung
Start
Start-up
phase
Startphase
42 sec 60 sec
Adjustment phase
Regelphase
90 sec
t (sec)
Ein
Grundlast
Base
load (%)
t (sec)
7.1.15 When to apply boiler sensor 2
Function
Two single stage heat generators
In order to measure the temperature in the second heat generator. See also 4.4.6
parameter 01
Two measuring points in the combustion chamber
In order to reduce standby losses by increasing the burner running times. With
automatic sensor switching between boiler sensor 1 and 2 after the burner switching
cycle the On- signal for the burner will be determined by the upper sensor (BS1) and
the Off- signal by the lower sensor (BS2)
7.1.16 External heat generator disable
Function
CAUTION
If the assigned variable input is short circuited, there will be a permanent disable of
the heat generator. If the contact is open again, normal operation will be continued.
This function is meant exclusively for external override signals and not for
safety switch off.
77
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
SDC / DHC 43
7.1.17 Heat generator forced dissipation
Function
Possible settings
When the temperature in the heat generator exceeds the set maximum temperature
limit, any excess energy is dissipated into circuits downstream. This function applies
to all controllers on the bus system.
OFF
No heat dissipation
Dissipation into DHW tank
Only for independent DHW tanks
CAUTION
Thermal mixer valve at water heater outlet obligatory because of scalding hazard.
Dissipation into heating circuits
Any excess heat is dissipated into existing heating circuits, without exceeding the set
maximum temperature. The intended room temperature may be exceeded for short
periods. If the respective circuits are equipped with room stations, the thermostat
function should be activated.
CAUTION
For floor heating a contact thermostat must be installed to control forced switch-off of
the pumps.
Dissipation into buffer tank
7.1.18 Flue gas temperature monitoring
NOTE
Only if Parameter 8 VI-1 = 13 – Flue gas sensor set in the “Hydraulics” menu.
NOTE
A flue gas sensor can only be connected to the variable sensor input VI 1. Due to the
high temperatures a PT 1000 sensor is used for this purpose. The control device
automatically evaluates the sensor data, which are different from the data supplied
by the standard sensors.
NOTE
When a sensor fault is detected with the fuel gas sensor active, and if flue gas
monitoring was set for temporary disable or permanent inhibit (safety functions),
there will be a heat generator switch-off in addition to the malfunction message.
Function
This function controls the necessary measures in case the fuel gas temperature
exceeds the allowable limit.
Only display of fuel gas temperature
No follow-up function; the actual fuel gas temperature is displayed in the Information
display.
Heat generator disable for set time when limit is exceeded
When the temperature limit is exceeded the heat generator is disabled for the set
time and a malfunction message is triggered.
Heat generator disable when limit is exceeded
When the temperature limit is exceeded the heat generator is disabled and inhibited
permanently. It can only be unlocked by a reset in the “Malfunction messages”
menu.
EN2H-0221GE51 R1105
78
SDC / DHC 43
Hydraulic Components and their Functions
Flue gas temperature limit
With the parameter set accordingly, the allowable temperature limit for the flue gas,
according to instructions of the heart generator manufacturer, has to be entered as
the reference value for the follow-up functions described above.
Recommended setting:
Nominal fuel gas temp. acc. to manufacturers’ data, plus 10 - 20 K
See also
7.2
5.6.6 Heat Generator Menu
Heat Exchanger Heat Generator, district heating
Function
The heat exchanger control assures that the right flow temperature is provided for all
heating demands. The set popint for the heat exchanger’s secondary flow
temperature is the maximum selection of all the required flow setpoints . A parallel
shift is to be entered under parameter no. 01.
Parameter no.
Name
Range
Presetting
Step
Unit
01
Parallel shift
–10 ... 50.0
0
0.5
K
The target value for the secondary flow temperature is limited by the parameter 02:
maximum limit. There is also a fixed minimum limit of 10°C.
The parallel shift is valid only if there is a demand higher than 15°C.
Parameter no.
02
Name
Max flow temp
target value
Range
10.0 ...
130.0
Presetting Step
90.0
0.5
Unit
°C
7.2.1 District Heating Valve On / Off Mode (district heating)
To assure always a minimum flow so that the heat meter can work precisely, pure
on/off switching is envisaged in low load mode. Parameter 03 is suitable for the
adjustment. The following diagram provides a clearer picture of the function.
100%
Valve
travel
Code742
0%
100%
Controller output
Parameter no.
Name
Range
Presetting
Step
Unit
03
Minimum travel
0 ... 50
10
1
%
79
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
SDC / DHC 43
Should the secondary flow temperature controller output fall below the settable
minimum travel in % (parameter 03), two-step operating begins and the valve is
closed. The valve remains closed until the internal controller output reaches 10%
again. If a 10% controller output is reached, the valve opens again to the minimum
travel. If the controller output drops below 10% again, the valve closes again and the
cycle starts from the beginning.
This means that whenever there are demands of 10% on the heat generator the
valve is operated in On / Off mode and the secondary flow temperature is controlled
this way.
7.2.2 Continuous Heat Exchanger Valve Control (district heating)
If the output of the secondary flow temperature controller rises above 10%, the PI
controller controls the secondary flow temperature according to the required set
point within its min. and max. limits. The control parameters, controller gain, integral
action time, and District heating valve1 run time are settable with parameters 04 to
06.
EN2H-0221GE51 R1105
Parameter no.
Name
Range
Presetting
Step
Unit
04
Controller gain
0 ... 50
0.1 ... 30.0
5.0
%/K
05
Integral action
time
(0 = pure P
controller)
0 ... 60
3
1
min.
06
District heating
valve1 run time
10 ... 1800 120
1
s
80
SDC / DHC 43
Hydraulic Components and their Functions
7.2.3 District Heating Return Temperature Limit (district heating)
Many district heating companies require minimal volume flows in their networks. It
can be obtained by reaching a high temperature difference between the flow and
return temperature.
Max. return
target value
Ex. 1 (Factory setting)
Return temperature
limitation
Ex. 2
Outside temperature
Max. return
target value
Ex. 3
Ex. 4
Outside temperature
Operating points for flexible
return temperature
limitation in Ex. 3 and 4
By means of district heating return temperature limitation the required temperature
difference is assured. The maximum limit can either be a fixed value limitation or a
flexible limitation according to the outside temperature. A fixed value limitation to
e.g. 50 °C means that this value is independent of the outside temperature.
In case of higher outside temperatures it is desirable that the maximum limit can be
reduced, i.e. flexible district heating return temperature limitation is to be adopted. By
doing so, the relevant outside temperature is assigned to the lowest possible district
heating return temperature and hence a good heat exploitation is obtained.
The values for the maximum limitation of the district heating return temperature
(Parameter 08) and the starting point of the flexible district heating return
temperature limitation (Parameter 09) can be set for the operation with heating
circuits. The flexible return temperature limitation can be switched off by selecting
10°C as the starting point (Parameter 09).
The lowest return target value for flexible return temperature limitation is fixed at
+ 40 °C.
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If the maximum limit is exceeded, a second Pl controller intervenes with the same
parameters as in the secondary control (heat exchanger control).
Return temperature limitation
(parameter 8)
Example 1: 90 °C
Starting point of the flexible return
temperature limitation (parameter 9)
10 °C
factory setting
Example 2: 50 °C
10 °C
Example 3: 80 °C
5 °C
Example 4: 50 °C
-10 °C
fixed value limit
Besides return temperature limitation either volume flow limitation or thermal output
limitation can also be set for this controller. The selection of these functions is
described below in parameter 11.
Parameter no.
Name
Range
Presetting Step
Unit
08
max. return
target value
0.0 ...
100.0
90.0
0.5
°C
09
Flexible district
Off,
heating ret. temp. -20.0 ...
operating point
10.0
Off
0.5
°C
11
Return limit:
0=Temperature
1=Volume flow
and temperature
0
-
-
0/1/2
2=Thermal
output and
temperature
7.2.4 Return Temperature Limitation for DHW Loading (district heating)
In the case of DHW loading a special constant return setpoint applies. It is valid only
if the DHW loading pump is operating. The return setpoint is to be set with parameter
no. 10.
Parameter no.
Name
Range
Presetting
Step
Unit
10
DHW loading:
40.0 ...
90.0
90.0
0,5
°C
return setpoint
7.2.5 Hot-water pre-control for District heating systems
The hot-water pre-control function is necessary for the controlled filling of hot water
storage tanks with layered filling from the district heating network. Generally, such
filling is carried out through a separate heat exchanger.
Operation
The function is operated via a new variable in the hydraulic parameter for mixing
circuit 1 and 2 (PARAMETER 03 and 04 / HYDRAULICS).
Function number: 30
In the parameter tree for the heating circuits, parameters 14, 15, 18, 19, 20, 21 and
22 are available. With the return flow limiter activated, parameter 17 is displayed,
too.
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Info messages
Hydraulic Components and their Functions
With the message “VORLAUF“, the symbol “WW“ for hot-water pre-mixing is
displayed to the lower left.
When the pump status is displayed, the string “ANFORDERUNG“ is displayed
instead of the operating mode.
Explanation
When the hot-water pre-control is active, the respective mixing circuit cannot be
used as a heating circuit anymore.
When the hot-water pre-control is active, the request for hot-water filling is not sent
directly to the energy management unit (and from there to the district heating valve),
but instead to the hot-water pre-control.
The hot-water pre-control forwards the nominal value, taking into account the
parameter-defined offset (PARAMETER 14 / mixing tree), to energy management
and adjusts to the nominal value, which was received from hot-water filling, at the
mixer actuator.
Any parameter-defined return flow limiter sensor (setting 7/8 at the variable input)
acts according to its defined function on the actuator of the hot-water pre-control.
The switching behavior of the SFP is described under a separate request.
The hot-water pre-control must be activated in the same control device as the
associated hot-water filling unit.
The MC minimum and maximum limits are not adjustable and not effective.
The run-down time of the MCP runs parallel with the SFP run-down time
The boiler parallel shift of the SFP (parameter) acts on the MC request.
The boiler parallel shift of MC acts on the heat generator, provided the SFP
operating mode has not been set to “external storage tank”.
The optional return flow limitation acts on the flow mixture according to the setting.
The hot-water pre-control acts on only a hot-water filling configured in the same
device.
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7.2.6 Mode of operation – hot-water pre-control
Operation
When operating in combination with hot-water pre-control, PARAMETER 08 (tank
drainage protection) does not act directly on the heat generator, but on the hot-water
pre-control.
For function with pre-mixer, parameter 08 is always adjustable. In this, the “OFF”
and “ON” settings have a different effect, which is described in the following.
Function
With the setting “OFF”, there will be no start-up protection through the hot-water precontrol. The SFP is switched on without any delay.
With the setting “ON”, the SFP is switched on only when the flow sensor detects that
the HW nominal temperature + ½ switching difference hot water (without offset) is
reached.
- HWPCnom = WWnom + P 09( HW )
- SFP=ON if HWPC act ≥ HWnom +
- SFP=OFF if HWPC act ≤ HWnom
1
SDHW
2
Key:
HWPCact =Actual temperature at flow sensor hot-water pre-control
HWnom =Hot-water nominal temperature
P09( HW ) =Value of hot-water parameter 09 (HW filling temperature offset)
SDHW =Switching difference hot water)
Both pumps (SFP and HWPC) switch off after completion of a tank filling, taking into
account their run-down times. If they are to switch off simultaneously, identical rundown times must be selected for them.
7.2.7 Operating principle – HW operating mode “External operation”
Operation
Function
7.2.8
If the energy supply for the hot-water filling is not provided through the district
heating valve, no hot-water request must be sent to the heat generator. The
following setting needs to be selected for this case:
HOT – WATER PARAMETER 07 (HW operating mode) = 7 (External operation)
The hot-water pre-control is part of the hot-water filling system. Consequently, the
request from storage control is forwarded to the hot-water pre-control, which acts
according to its function.
In the HW operating mode “External operation“, the nominal value from the hot-water
pre-control is not forwarded to the energy management unit (and, therefore, not to
the district heating valve).
Conditional parallel operation for mixing circuits
This function is only realized for district heating controllers.
Operation
EN2H-0221GE51 R1105
Additional setting for HOT – WATER PARAMETER 07 (HW operating mode) = 8
(priority with release control operation mixing circuits)
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Function
Hydraulic Components and their Functions
Function as for hot-water priority operation (setting 2), with the difference that hybrid
heating circuits (mixing circuit control, constant control, fixed-value control) can still
adjust to their nominal value. During an active hot-water filling, the heating circuits do
post a nominal value to energy management. Mixing circuits must operate at the
temperature required by the hot-water request. Direct heating circuits remain
switched off.
A hot-water filling with priority operation in the system has priority. The mixer must
shut in this case.
7.2.9 Operating mode circulation pump
During service water filling, it should be possible to switch off the circulation pump.
Operation
Access level
Function
New parameter HOT – WATER PARAMETER 16
HS (Heating Specialist)
1: Function as before
2: While hot-water filling is active, the circulation pump is switched off.
7.2.10 Deactivation district heating control
Operation
Function
Parameter tree District heating, PARAMETER 01: Settings range is extended to
OFF, -10…+50.
Setting “OFF” means district heating deactivated
District heating valve permanently in STOP position when deactivated
The switch-over of the heat generators is controlled by district heating parameter 01.
7.2.11 Return Interval flushing (district heating)
If max. limitation is active and the district heating valve is opened less than 5%, the
district heating valve is opened to 10% every 10 minutes in case of heat demand, so
as to obtain an adequately precise return temperature measurement. This assures
that the limitation sensor is adequately supplied during return.
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7.2.12 Heat meter for additional limitation according to the volume flow or thermal output
(district heating)
This function is only active if a heat meter is present in the system. The signals
provided by the heat meter – pulses per unit of volume or pulses per unit of thermal
output – are used for the limitation function. Calibration of the thermal output and the
volume flow under parameters 12 und 13 allows calculating the entities thermal
output and volume flow. The values of these two entities are displayed when key ¤
is pressed. Nominal limits for thermal output and volume flow are entered under
parameters 14 und 15.
This limitation function operates as PI controller above the nominal value, using the
same parameters as the temperature control function.
The values are independent of the outside temperature. The heat flow is derived
from a volume signal in the following way:
The pulses representing the thermal output are counted, e.g. 5 pulses in one minute.
With the calibration parameters the actual thermal out, in kW, is calculated.
At an input of 60 pulses/min
7.2.13 Charging pump (CHP)
NOTE
Function
Bus system
:
Extended running time CHP
See also
EN2H-0221GE51 R1105
This function is only active if the CHARGING PUMP function was assigned to one of
the outputs "Direct circuit pump", "Variable Output 1"or "Variable Output 2" in the
"Hydraulics" menu.
A charging pump to supply remote parts of the heating system is active at every
heating or HW request to the heat generator. It can be connected, through variable
settings, at one of the variable outputs or at the direct circuit pump output.
A charging pump connected to the central device under address 10 will run as soon
as any request is present on the data bus (including all heating and hot-water circuits
within the control network).
A charging pump connected to an extension controller (address 20, 30,...50) runs
only on request from the heating circuit associated with the respective control
device.
To avoid a high-temperature safety switch-off of the heat generator, a charging
pump is switched off according to the set time delay when a request to the heat
generator is withdrawn.
5.6.1 Hydraulic Menu and 5.6.6 Heat Generator Menu
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Hydraulic Components and their Functions
7.2.14 Primary pump
NOTE
This function is only active if the PRIMARY PUMP function was assigned to one of
the outputs "Variable Output 1" or "Variable Output 2" in the "Hydraulics" menu.
Function
The primary pump is the functional equivalent of a loading pump. It is only active
when heating requests to the heat generator are present. Hot-water requests are not
considered.
Bus system
A primary pump connected to the central device under address 10 will run as soon
as any request is present on the data bus (including all heating and hot-water circuits
within the control network).
A primary pump connected to an extension controller (address 20, 30,...50) runs only
on request from the heating circuit associated with the respective control device.
Extended running time
primary pump
To avoid a high-temperature safety switch-off of the heat generator, the primary
pump is switched off according to the set time delay when a request to the heat
generator is withdrawn.
7.2.15 Boiler circuit pump
NOTE!
Function
BCP2
BCP pre-run time
Function active only if the function ”boiler circuit pump 1” was assigned in the
”Hydraulic” menu to one of the variable outputs ”Direct circuit pump”, ”Variable
Output 1” or ”Variable Output 2”.
The output controls a boiler circuit pump (or butterfly valve), which is switched on in
parallel with the heat generator and is put out of operation with a time delay after
switching off the heat generators.
For systems with two single boilers or a double boiler two boiler circuit pumps can be
connected. The second output controls the boiler circuit pump of the sequential
boiler.
The pre-run time determines the burner’s switch-on delay and hence the opening
time of the shut-off device (motorized valve) to assure trouble-free circulation within
the heat generator when the burner switches on.
The setting of a pre-run time is only relevant if a shut-off device (motorized valve) is
used instead of a boiler circuit pump. Actuators with a reversible motor must be
operated by means of a slave relay with double throw contact (separate control
phases Lopen/Lshut).
BCP switch off delay
After the switch-off of the burner the boiler circuit pump is switched off with a time
delay according to the set time in orderto prevent a safety switch-off of the heat
generator at high temperatures.
The switch off delay depends on the type of heat generator to be used and is to be
adjusted accordingly.
NOTE
An external heat generator disable acts on output KP.
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7.2.16 Parallel heat generator enabling (PWF)
NOTE
This function is only active if the “parallel heat generator enabling” function was
assigned to one of the outputs "Direct circuit pump", "Variable Output 1"or "Variable
Output 2" in the "Hydraulics" menu.
Function
Regardless of a request to the heat generator, the output programmed accordingly
(DK, VO-1, VO-2) is activated immediately when the burner relay is activated (no
pre-running time).
When the burner relay is deactivated the programmed output is switched off after a
delay time. The switch-off duration depends on the setting of parameter 14
(extended running time) in the Heat generator menu.
Note
See also
A parallel setting of boiler circuit pump and parallel heat generator enabling is
allowed.
The temporary interruption (Solar/Solid fuel) and the external heat generator disable
act on output PWF.
5.6.1 Hydraulic Menu and 5.6.6 Heat Generator Menu
7.2.17 Return control
Function
To prevent the return flow temperature from dropping below the minimum return
temperature required by some heat generators, the control system features various
options for raising the return temperature. Once one of these return control options is
active, a parameter tree is activated where the appropriate settings can be entered.
The parameter “Boiler return control” determines the lowest allowable return flow
temperature for systems with direct or indirect return control. When the heat
generator return temperature drops below the set limit, the respective return control
device is activated and raises the return temperature until the set temperature is
reached or exceeded.
See also
EN2H-0221GE51 R1105
5.6.8 Return control Menu
88
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Hydraulic Components and their Functions
7.2.17.1 Bypass pump (RBP)
Function
The simplest way of controlling the return flow temperature is by means of a bypass
pump. When the return temperature in the heat generator drops below the set boiler
return minimum temperature, flow mixing is initiated by switching on a bypass pump
parallel to the heat generator. As soon as the return temperature rises above the
boiler return minimum temperature plus the return switching differential, the bypass
pump will be deactivated after the set delay time (Extended running time bypass
pump). As the mixing itself is not controlled, the bypass cross sections must be
taken into account for the system layout.
As soon as the switch-off conditions are fulfilled, the bypass pump will be switched
off after a delay according to the actual setting.
NOTE
To avoid intermittent operation of the bypass pump, the return sensor must always
be positioned downstream of the mixing point for this mode of return temperature
control.
7.2.17.2 Return control through controlled flow mixing
Function
If the control unit is equipped with a mixer output, this output can be programmed for
controlled flow mixing.
In this mode of return control the programmed mixing circuit adjusts the return
temperature to the return temperature setpoint. The adjustment is independent of the
status of any start-up protection of the heat generator. The return sensor for this
function is connected at the sensor input of the respective mixing circuit (e.g. VF 1
for mixing circuit 1).
The mixing circuit operates like a boiler circuit pump without boiler start-up protection
for this purpose.
7.2.17.3 Indirect return control
Function
Indirect return control is realized by means of the mixer valves in the heating circuits.
It only works for heating systems without a bypass pump and without controlled flow
mixing.
When this function is active, two values are calculated independently for regulating
each mixing circuit. The first value is the control variable for the flow setpoint of the
heating circuit; the second is the control variable for the return setpoint.
The control variable used for mixer control (mixer control variable) results from the
superimposition of both values. In this the adjustment of the return temperature is
treated with priority.
Indirect return control is only active with mixing circuits that are in heating operation
as well. It does not affect a heating circuit in reduced operation.
To avoid excessive pulsing, we recommend enabling the connected consumers
(heating and HW circuits) with staggered switch-on times.
This function does not affect direct heating circuits.
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NOTE
7.3
SDC / DHC 43
Indirect return control is only feasible for system without bypass pumps and without
controlled flow mixing.
Heating Circuit
7.3.1 General Heating Circuit Functions
7.3.1.1 Heating Characteristic Curve
The prerequisite for a constant room temperature is the exact setting of the heating
characteristic curve (see also the Heating Characteristic Curve section) of the
relevant heating circuit as well as a correct design of the heating system on the part
of the heating technician according to the heat demand calculation.
If adjustments are necessary, these should be made in small steps at a distance of a
few seconds to assure that a steady state condition is obtained.
Differences that can be balanced by installing a room device (see available
accessories) may occur between the measured room temperature in the inhabited
area and the desired room temperature.
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7.3.1.2 Setting of the Heating Characteristic Curve
Boiler- / Flow temperature (0C)
£
This key provides for the setting of the heating characteristic .
Outside temperature (0C)
T room (0C)
The slope of the heating characteristic describes the relation between the change in
the flow temperature and the change in the outside temperature. In case of large
heating surfaces (and therefore low flow temperatures) like floor heating systems the
heating characteristic curve is less steep compared to smaller heating surfaces (e. g.
radiators).
The setting value refers to the lowest outside temperature used for heat demand
calculation. This parameter is to be set by the technician and should not be altered
anymore.
The setting of the heating characteristic should be carried out only in small steps and
at adequately long intervals so that a stable condition can be noticed. It is
recommended to make any corrections in 0.1 – 0.2 steps after 1–2 days.
CAUTION
In order to measure the room temperature the heating circuit of the most
occupied room is to be used.
Radiator thermostats are used together with correctly designed radiators to
control the external heat gain and should hence be almost completely open.
During the adjustment phase additional external heat sources like fireplaces,
majolica stoves, etc. should not be used. Furthermore, during the
measurement period excessive ventilation is to be avoided.
The measurement period covers basically the heating phases.
If the heating characteristic is correctly set, the room temperature remains constant
according to the set daytime setpoint regardless of the changes in the outside
temperature.
If an automatic correction of the heating characteristic (heating characteristic
adaptation) is made at the service level, this parameter can no longer be manually
set. Instead of the slope display the message HEATING CURVE starts to flash
during the adjustment and is corrected continuously.
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Recommended settings:
Floor heating:
0.3 ... 1.0
Radiator heating:
1.2 ... 2.0
Convector heating: 1.5 ... 2.0
NOTE!
The heating characteristics are limited by the minimum and maximum temperature
limits. With activated limits the relevant flow temperature is controlled exclusively
according to the set limit values.
The first heating characteriszic displayed is always the direct heating circuit (HC). In
case of room units the assigned heating circuit will be the first. If other heating
circuits are existing, their slope values can be selected with the relevant access
authorization and modified if necessary.
Setting
After pressing the £ key the direct heating circuit (HC) flashes with the current
setting.
Other heating circuits, if existing, can be selected with the rotary pushbutton and the
corresponding slope values can be modified if necessary.
Setting range
Factory setting
OFF, 0,05 ... 3,5
Direct heating circuit (DK):
= 1.50
Mixer heating circuit 1 (MK1): = 1.00
Mixer heating circuit 2 (MK2): = 1.00
To return to the basic display press the £ key twice or just wait for approx.
60 seconds for automatic return (see 5.1.2.7 "System Information).
7.3.1.3 Heating Circuit Reduced Mode
Function
RED (Reduced mode)
During reduced mode you can choose from two operating modes:
The direct heating circuit’s heating circuit pump remains active during reduced mode
(see Switching Time Program). The flow temperature is determined by the relevant
reduced heating characteristic according to the decreased room setpoint. The set
minimum temperature will be maintained.
Application: Buildings with low insulation values and high heat losses.
ECO (Switch-off Mode)
During reduced mode the direct heating circuit is completely switched off if the
outside temperature exceeds the set frost protection limit. The heat generator
minimum temperature limit is deactivated. The heating circuit pump is switched off
with a short delay in order to avoid a safety switch-off owing to the post heating of
the heat generator (extended pump running time).
If the outside temperature falls below the specified frost protection limit, the controller
switches from switch-off mode (ECO) to reduced mode (RED) and the heating circuit
temperature is adjusted according to the set reduced characteristic considering the
set heat generator minimum temperature settings.
Application: Buildings with high insulation values.
CAUTION
See also
EN2H-0221GE51 R1105
The mode set here applies also for the ASENT and CONSTANT REDUCED
operating modes.
5.6.4 Direct Heating Circuit Menu
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Hydraulic Components and their Functions
7.3.1.4 Heating system (exponent)
Function
This parameter refers to the type of heating system (floor, radiator, convector
heating) and can be compared to the exponent of the relevant heat exchanger. The
setting determines the curvature of the heating characteristic of the direct heating
circuit and compensates the performance losses at low temperatures by means of its
progressive characteristic.
Depending on the type of heating system the following settings are recommended:
1.10
Slightly progressive heating characteristic for floor or other panel
heating systems.
1.30
Progressive standard characteristic for all radiator heating systems with
m-values comprised between 1.25 and 1.35.
2.00
Progressive heating characteristic for convector and baseboard heating
systems
3.00 – 5.00 Very progressive heating characteristic curves for general ventilator
application with high start temperatures.
See also
5.6.4 Direct Heating Circuit Menu
7.3.1.5 Heating Circuit Temperature Limitation
NOTE!
Function
This function is not active if the heating circuit control is set at constant control (CC).
This function limits the flow temperature of a heating circuit. The minimum and
maximum temperatures set in the relevant parameters of a heating circuit must not
exceed or fall below the setpoints.
Minimum temperature limitation is not active:
• in case of switch-off in standby mode above the frost protection limit
• in case of switch-off in reduced automatic mode with the activated ECO function
above the frost protection limit
• in case of switch-off in constant reduced mode with activated ECO function
• in case of automatic summer switch-off
Application
CAUTION
See also
- Floor minimum limitation
- Ventilation pre-adjustment (warm air curtain)
- Convector heating
To protect the floor heating systems against accidental overheating
(malfunction – manual mode) a controller-independent maximum temperature
limit must be provided. In this case a contact thermostat is recommended. By
means of its switching contact the control phase of the relevant heating circuit
pump is looped. The thermostat is to be set at the maximum permissible
system temperature.
5.6.4 Direct Heating Circuit Menu
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7.3.1.6 Heating Circuit Parallel Shift
Function
For special applications this function offers the possibility to admit the heating
characteristic curve of the direct heating circuit with a constant shift value. The
demand value plus the shift value is transmitted to the heat generator.
The displacement of the heating characteristic curve is carried out in parallel with the
flow temperature.
Application
See also
Base correction of the heating characteristic for adjustment to the desired room
temperature without changing the room setpoint.
5.6.4 Direct Heating Circuit Menu
7.3.1.7 Heating Circuit Pump extended running time
Function
If tere is no heat demand from the heating circuit, the heating circuit pump is
switched off after the time set in the relevant heating circuit menu to avoid a safety
switch-off of the heat generators at high temperatures.
See also
5.6.4 Direct Heating Circuit Menu
7.3.1.8 Screed function
NOTE
Function
This function is not active if the heating circuit control is used as constant control
(CC).
The screed function is used exclusively for the required drying of newly applied
screed on floor heating systems. The process is based on recommendations of the
German Bundesverbandes Flächenheizungen (Federal Association for Surface
Heating) concerning the heating of fresh floor covers (heating according to a
mandatory temperature profile).
This is a special function that will not be interrupted by any other operating mode
(including manual operation or emission measurement)!
The screed function can be activated for mixer circuits and, in special cases (e.g. in
conjunction with a condensing boiler) also for a direct heating circuit.
When the screed function is active, all weather-dependent control functions of the
heating circuit concerned are switched off. The respective heating circuit operates
independent of the operating mode (switching times) as a constant temperature
controller.
An active screed function can be deactivated at any time (parameter setting Screed
function = OFF).
On completion of the screed function, the heating circuit returns to operation
according the actual operating mode setting.
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The screed function consists of two steps:
Step 1
Function heating acc. to DIN 4725 Part 4 (setting 1)
• Constant heating at 25 °C on the start day and for the following three days.
• Heating at set maximum flow temperature, limited to 55 °C.
TVLnom. [°C]
Maximum temperature setting = 40 °C
40
35
30
25
ST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
t
[Days]
Time profile of the screed function for function heating
Step 2
Heating function for floor covering (setting 2)
The heating of the floor covering follows a preset temperature profile.
Starting with 25°C on the first day, the requested temperature rises by 5° C per day
over the following days until the maximum temperature of the heating circuit is
reached. After that the nominal temperature is reduced with the same stepping until
the base point of 25°C is reached again.
Example
Maximum temperature setting for the heating circuit = 40 °C
Day 1:
constant heating at 25 °C
Day 2:
constant heating at 30 °C
Day 3:
constant heating at 35 °C
Day 3:
constant heating at 40 °C
Days 5-15:
constant heating at maximum flow temperature
Day 16:
reduced heating at 35 °C
Day 17:
reduced heating at 30 °C
Day 18:
reduced heating at 25 °C
On the start day heating at 25 °C is maintained till midnight. The heating function for
floor covering sets in at 00:00 h on the following day.
TVLnom. [°C]
Maximum temperature setting = 40°C
40
35
30
25
ST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Time profile of the screed function for floor cover heating
95
t
[Days]
[Tage]
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
Step 1+2
SDC / DHC 43
Function heating with subsequent floor cover heating (setting 3)
Both steps are carried out subsequently.
TVLnom [°C]
40
35
30
ST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
t
[Days]
Time profile of the screed function for function heating and heating for floor covering
Prior to activation of the screed function it must be ensured that the screed to be
heated has dried appropriately.
Cement screed:
21 days
Calcium sulfate (anhydride) screed: 7 days
NOTE
The maximum profile temperature is determined by the respective maximum flow
temperature limit.
After a short power failure of restart, a previously activated screed function is
continued where it was interrupted.
The Screed function parameter is automatically set to OFF when the function is
completed. The screed function can be activated again if necessary.
In the status display of the respective heating circuit, the word SCREED is displayed
instead of the actual operating mode.
7.3.2 Heating Circuit Constant Temperature Control
NOTE!
Function
This function must be activated in the HYDRAULIC menu for the corresponding
heating circuit (Direct heating circuit, Mixing circuit 1, Mixing circuit 2).
The control circuit is operated at a constant flow temperature value. The demand
value is transmitted to the heat generator.
The constant temperature setting is carried out with the relevant parameter
”Constant Temperature Setpoint”.
See also
5.6.4 Direct Heating Circuit Menu
7.3.3 Fixed Value Control
Function
EN2H-0221GE51 R1105
As constant temperature control. In this case the demand value is not transmitted to
the heat generator and switching-times program and operating modes can be
activated.
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7.3.4 Assessment of the Room Temperature / Room Influence
7.3.4.1 Heating Circuit with Room influence
Function
Depending on the application this function determines the enabling of the room
sensor in a room unit/room sensor connected with the direct heating circuit and of all
the parameters related to room temperature measurement.
No room sensor
In the following cases:
• No room sensor influence when mounting the room unit outside the occupied
area (e.g. in unheated rooms like cellars, etc.).
• No room sensor switching for apartment buildings that, due to different residence
layouts, are operated at different room temperatures and therefore do not offer a
reference room.
• No display of the current room temperature is provided in the system information
if the room influence is off.
• The feed temperature is corrected purely by atmospheric conditions.
Room sensor active
for room influence and connected outside sensor:
• With the room sensor switched on, the heating circuit is controlled in weatherresponsive mode taking into account the actual room temperature. The room
temperature deviation is taken account of according to the “Room factor”
parameter setting.
• If an SDW 20 room device is connected, the actual room temperature is indicated
in the basic display instead of the heat generator temperature.
• When the actual room temperature drops below the present nominal room
temperature + 1K, any active summer switch-off is disabled, provided Automatic
operation was not selected.
Room sensor active, operation disabled:
This setting enables the room temperature-related functions while operation via the
room device is disabled.
Application
Public buildings (government, schools, public facilities, etc.) where only the
registration of the room temperature is required.
Room sensor off, operation active:
At this setting the room sensor is only used as a display device without influencing
the room temperature-related functions. The operation of the room device is possible
without restrictions.
Application
See also
All system layouts that exclude room influence while the display of the actual room
temperature is still required (in contrast to setting OFF).
5.6.4 Direct Heating Circuit Menu
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7.3.4.2 Heating Circuit Room Factor
Function
This function determines to what extent a deviation of the room temperature from the
setpoint affects the control of boiler flow temperature.
If there is no difference between the desired (TARGET) and the current (ACTUAL)
room temperature, the direct heating circuit’s flow temperature is controlled
according to the set heating characteristic .
If there is a difference between the room temperature and the setpoint, the heating
characteristic is shifted parallel to the room temperature axis so that the deviation is
compensated. The amount of the displacement depends on the setting of the room
factor.
Example
The following relation applies:
Corrected room setpoint = adjusted room setpoint – (Deviation x Room Factor)
100
Adjusted room setpoint = 21 °C
Actual room temperature = 20 °C
Deviation = – 1 K
For a room influence of 100%:
Corrected room setpoint = 21 °C -(-1K · 100) = 22 °C.
100
The boiler temperature is controlled according to a heating characteristic which
corresponds to a room temperature setpoint of 22 °C.
High settings lead to a quicker adjustment of the control deviation, while they reduce
the stability of the control circuit and can lead with excessively high setpoints to the
oscillating of the control value (= room temperature).
7.3.4.3 Room Controller Heating Circuit
At this setting the heating circuit concerned can be controlled through a room
controller. This requires a room device SDW 20 with room control function. The room
controller directly determines the required flow setpoint and transmits this
information to the central device.
At this setting the control of the respective heating circuit is completely room-guided.
Weather-dependence is inactive. However, the parameters for weather response
(heating characteristic curve settings) can still be entered.
7.3.4.4 Heating curve adaptation heating circuit
Function
Adaptation means the automatic adjustment of heating curve slope to the building
characteristics under continuous measurement of outside, flow and room
temperatures. The determination of the optimum heating curve requires prolonged
heating periods so that a balance between heat supply and heat reduction is
ensured. The adaptation causes a targeted readjustment of the heating curve,
depending on the control deviation.
The value found through adaptation is not stored. The larger the deviations, the
larger the correction steps; the smaller the deviations, the smaller the corrections.
The heating curve is newly adapted whenever the heating curve slope parameter
setting is changed at a later stage.
An active adaptation is indicated by a flashing symbol in the user menu.
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Adaptation is a useful tool for determining the correct building characteristic curve.
We recommend switching off this parameter once the adaptation is complete, and to
set manually, in the user menu, the slope value found though adaptation.
NOTE
An adaptation is allowed under the following conditions:
• Room sensor switched on (Room influence = ON)
• Heating curve adaptation switched on
• Heating operating under any Automatic program
• Continuous heating
• Mean outside temperatures below 16°C
• Room temperature deviations from present setpoint > ±1K.
The adaptation will not be initiated:
• if the heating circuit is switched off
• during the optimization phases
• if Heating curve adaptation is switched off
• if the room sensor is disabled (Room influence = OFF)
• if the outdoors sensor is defective or disconnected
• during reduced operation under any Automatic program
• during permanently reduced operation
• when the boiler maximum temperature is reached
7.3.4.5 Heating Circuit Switch-on Optimisation
Function
With this function the latest heating up time is calculated considering the outside and
room temperature (heat loss) to assure the desired room temperature at the set
occupancy start time.
The switch-on times saved in the switching time programs for the relevant heating
circuit do not refer any longer to the heating start time but to the occupancy start
time (i.e. the time when the desired room temperature is reached).
calculation of the advanced sw itch on time
tvor
tvor max
ϑANorm
ϑRTSoll
( −12°C )
( 20° C )
ϑA
ϑ RTSoll
=
room setpoint at the start time (adjusted switch on time)
t vor max
=
max.optimization time (Parameter 06)
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See also
7.3.4.5.1
SDC / DHC 43
ϑ ANorm
=
design outside temperature
t vor
=
actual optimization time
ϑA
=
actual outside temperature
5.6.4 Direct Heating Circuit Menu
Switch-on Optimization for Room Control (RC)
For room controller operation, the advance time is determined by adaptation. For this
function, a room station SDW 20 must be connected and its parameter set
appropriately in the heating circuit menu (parameter 4 = RC). The function will not be
effective in conjunction with room device SDW 10.
Function
With optimization switched off, a certain time passes at the transition between
reduced operation to heating operation until the room temperature reaches the
nominal daytime temperature (daytime setpoint).
This time is measured to determine an advance factor, which defines how much time
per kelvin of temperature rise the heat-up process takes. The advance factor is
computed from the time measured for the last x heat-up cycles, with x acting as a
damping factor.
The maximum advance time is derived from the parameter setting for switch-on
optimization (direct circuit or mixer 1 or 2 parameters 06).
A sliding setpoint adaptation starting from the advance time is not performed as the
entire control algorithm is designed for sharp setpoint steps.
Boundary conditions
Switch-on optimization is carried out only if:
• the controller is in Automatic operation
• the controller is in Reduced operation, meaning that there will be no advance
switch-on between 2 subsequent heating cycles with different room temperature
setpoints
• the new room temperature setpoint is higher than the reduced temperature.
7.3.4.6 Function Heating Limit
This parameter supplements the summer switch-off function. It deactivates the
respective heating circuit as soon as the computed flow temperature setpoint
approaches the present room temperature setpoint.
The heating limit parameter can be activated separately for each heating circuit.
Function
Switch-off:
Switch-on:
Flow-set < (room-set + heating limit setting)
Flow-set > (room-set + heating limit setting + 2K)
Example:
Room setpoint = 22 °C, heating limit setting = 2 K
Switch-off at flow setpoint 24 °C (22°C + 2K)
Switch-on at flow setpoint 26°C (22°C + 2K + 2K)
Boundary conditions
The SUMMER SWITCH-OFF function (menu SYSTEM - parameter 04) has priority
over the HEATING LIMIT function.
The FROST PROTECTION function (menu SYSTEM - parameter 05) has priority
over the HEATING LIMIT function.
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7.3.4.7 Heating Circuit Room frost protection Limit
Function
This function determines the room setpoint of the corresponding heating circuit
during switch-off mode with frost protection activated:
• during holiday mode
• in automatic mode between the heating cycles with active ECO function (see
5.6.4 Direct Heating Circuit Menu, Parameter 01 – Reduced Mode).
• in constant reduced mode with active ECO function (see 5.6.4 Direct Heating
Circuit Menu, Parameter 01 – Reduced Mode)
In connection with a room unit the heating circuit is controlled according to the room
frost protection temperature.
Without a room unit the setting serves a default value for the reduced room
temperature and is controlled on the basis of the latter.(parameter 08)
NOTE!
With lasting frost protection mode and sensitive objects in the house like antiques,
plants, etc. the setting value is to be duly adjusted.
7.3.4.8 Room Thermostat Function (Room Temperature Maximum Limit)
Function
This function determines a room temperature-related limit with adjustable switching
differential. If the room temperature of the relevant heating circuit exceeds the
current daytime or reduced room setpoint by the set switching differential, the
heating mode is temporarily stopped (heating circuit pump switched off).
Heating operation is resumed as soon as the room temperature of the respective
heating circuit drops to 0.5 K below the switch-off temperature.
Example:
Daytime room temperature setpoint = 22 °C
Thermostat function setting = 4 K
Interruption of heating operation: TRoom > (22 °C + 4 K) > 26.0 °C
Resumption of heating operation: TRoom < (26 °C – 0.5 K) < 25.5 °C
Setting OFF disables the thermostat function.
NOTE
The thermostat function is effective in Heating mode and in Reduced mode.
The thermostat function is disabled when AT frost protection is active.
See also
7.3.4.8.1
5.6.4 Direct Heating Circuit Menu
Special mixing circuit functions
Mixing circuit return
temperature high limit
By means of an additional return sensor for the mixing circuit a return temperature
high limit control for this mixing circuit can be activated.
With some applications too high return temperatures may cause technical problems
(district heating, condensating boilers) These can occur if heating system does not
need the heat energy (e.g. radiator valves closed).
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If the return temperature exceeds the maximum value, the controller will change
from flow control to return control and thus prevent too high return temperatures.
7.3.4.8.2
Mixer control
7.3.4.8.2.1 Proportional band Xp
The proportional band Xp defines how a step change of the setpoint effects a
change of the corresponding actuator according to the new setpoint.
Example:
Consider an actuator moving though an angle of 90° in an action time of two
minutes. When a sudden flow temperature control deviation of 10 K occurs (e.g.
when the system switches from reduced to daytime operation) and the P-band
setting is 5%/K, the actuator has to open by 50 % (= 5%/K x 10K). Consequently, the
duration of the actuation pulse is one minute (= 50 % of the actuator action time).
7.3.4.8.2.2 Integral action time Tn
The integral part (= adjustment time) determines the dynamic behavior of the
controller and thus the time required by the controller to adjust for the actual control
deviation. The integral action time is independent of the amount of deviation.
Example:
With a sudden flow temperature control deviation of 10 K (e.g. when the system
switches from reduced to daytime operation) and a Tn setting of 7 minutes, the
controller will adjust for the new (10 K higher) flow temperature after the set time.
NOTE
EN2H-0221GE51 R1105
The adjustment time can be determined through the Ziegler-Nichols method: The
mixer is closed, initially, and the heat generator is taken to the maximum
temperature for the heating circuit concerned. As soon as half of all consumers at
the circuit to be measured have been opened, the mixer is fully opened from cold
condition (= room temperature) by means of the Relay Test function. The
characteristic heat-up curve, i.e. the temperature development over time following
this action, shows an inflection point. The crossing of the tangent through that point
and the time axis is the delay time. This value multiplied by the factor 3.3 is the
optimum integral action time for this heating circuit.
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Example: Step response function (surface
heating)
In the example illustrated to the right the mixer
circuit temperature reaches the level of the heat
generator temperature after about 17 minutes,
with the mixer fully opened.
The curve tangent through the inflection point
indicates a delay time of 5 minutes.
The resulting optimum adjustment time (Tv x 3.3)
is approx. 16.5 min (setting: 17)
Temperature (°C)
Inflection tangent
Inflection point
Delay time Tv
Recommended basic setting for integral action time for different heating systems:
Application
Tn
Floor heating and other static heating surfaces
10 - 30 min
Radiator heating
6 -10 min
Convector heating
3 - 6 min
7.3.4.8.2.3 Sample time Ta
The sample time is a controller-internal quantity which defines the time interval
between two subsequent actuator pulses in the presence of a control deviation.
Shorter sample times allow finer adjustments.
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7.3.4.8.2.4 Actuator Running Time
This function allows adjusting the actuator, with regard to its finite running time, to
the control characteristics, meaning that actuators with different running times (e.g. 1
min, 2 min, 4 min) react to the same deviation by readjusting by the same amount
through adapting the action times. The integral action time Tn remains unchanged in
this. However, care must be taken that the latter must always exceed the running
time of the respective actuator.
Example of the coaction of P-band, I-band, adjustment time and sample time
Step response to different control deviations
(open control circuit, actuator pulled off)
Integral action time Tn=7 min
Sample time Ta=20 sec
Mixer running time = 2 min
Mixer opening (%)
Position OPEN
The P-pulse, which is proportional to the control
deviation, is followed by further actuator pulses if the
control deviation was not eliminated at that point (Iband)
The integral action time remains constant for different
control deviations.
Actuator characteristics
For control deviation 50%
Integral action time Tn=7 min
Actuator characteristics
For control deviation 25%
Integral action time Tn=7 min
Adjustment time Tn (XW=25%)
Adjustment time Tn (XW=50%)
Action time (min)
Actuator pulses for control deviation XW=50%
Actuator pulses for control deviation XW=25%
P-band
I-band
7.3.4.8.2.5 End position function actuator
This function determines the type of control signal in the end positions OPEN and
CLOSED of each actuator.
1 = Continuous voltage signal at connector OPEN or CLOSED at the respective end
position
2 = De-energized in end position OPEN or CLOSED respectively
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7.3.5 Domestic Hot Water Heating
7.3.5.1 DHW Tank Loading (DHWP)
Function
The output controls at request a DHW loading pump during the relevant operating
times.
DHW Day
The DHW (Domestic Hot Water-) daytime temperature is set with a key on the user
interface. The DHW daytime temperature provides for the desired hot water
temperature during DHW operating times in the automatic program and during the
PARTY and HEATING operating modes.
This setting is the initial value for the nominal temperatures that can be set for each
heating cycle in the switching-time programs. The temperature settings in the
switching time programs are automatically adjusted when the HW daytime
temperature is changed.
Example
Before
Temperature setting hot water daytime temperature:
50 °C
Temperatures in switching-time program:
05:00
–
08:00
08:00
–
16:00
16:00
–
22:00
60 °C
50 °C
60 °C
After
Temperature setting hot water daytime temperature:
52 °C
Temperatures in switching-time program:
05:00
–
08:00
08:00
–
16:00
16:00
–
22:00
62 °C
52 °C
62 °C
Changed settings are stored when key § or î is briefly pressed again or after
automatic return at a preset time. Once the settings are stored, the unit automatically
switches to Basic display.
See also
WW Night
5.1.2.4 "Daytime DHW Temperature" Key
Hot water economy temperature is the setpoint for the DHW tank between the active
operating mode times in automatic mode.
If a DHW thermostat is used to determine the water heater temperature, the
parameter for the setting of the economy temperature is skipped.
Legionella Protection
In order to kill Legionella germs in the tank, a Legionella protection function can be
activated. To activate, use parameter 02 in the Domestic Hot Water Parameter Menu
(DHW).
In order to completely kill all germs, the Legionella protection temperature should be
set at least at 50 °C.
The setting is carried out with two parameters. The weekday for Legionella
protection can be selected by the end user with a freely accessible parameter
(parameter 02). With parameters 03 and 04 the time and temperature can be set by
the heating technician.
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Temperature measurement
SDC / DHC 43
Type of temperature measurement
This function determines the type of temperature measurement in the hot water tank.
Usually an electronic temperature probe (immersion sensor in the hot water tank) is
used for this purpose, utilizing the temperature-dependent electric resistance of the
probe.
Alternatively, hot water provision can also be controlled by a mechanical
temperature controller (Thermostat switching contact). A hot-water thermostat is
connected to tank sensor input SF and set to the required nominal temperature.
When the thermostat request energy via the tank sensor input (contact closed), the
tank is loaded with hot water at the set hot water maximum temperature until the
contact opens again.
NOTE
Maximum Temperature
NOTE!
CAUTION
With hot water control through a thermostat the actual hot water temperature cannot
be measured and registered and will therefore not be displayed as part of the system
information. Also, the hot water nominal temperatures cannot be set.
This function limits the temperature in the DHW tank according to the
aforementioned set value (parameter06). The desired water heater daytime
temperature to be set at the user level is limited by this parameter.
If a DHW thermostat is used to determine the water heater temperature (see
Parameter 05), this function is not active.
Hot water maximum temperature limitation is function protecting the tank and
terminates hot water loading into the tank. The tank loading pump is switched
off immediately when the maximum temperature is exceeded. In this case it
cannot be ensured that the set extended running time is adhered to.
NOTE
DHW Operating Mode
(parameter 07)
If a HW-thermostat is used instead of an electronic sensor, the HW maximum
temperature setting (plus the set temperature shift during loading) is forwarded to the
heat generator.
With this function it is set how the heating system reacts to a heat demand from the
DHW tank. There are 5 different setting options.
Parallel Mode
During tank loading the heating circuits remain operative.
Priority Mode
During tank loading the heating circuits are put out of function. They are restarted as
soon as the DHW loading pump extended running time is over.
If the DHW setpoint is not reached after 4 hours, an alarm is indicated on the display
Conditional Priority
During tank loading the heating circuits remain blocked until the temperature in the
heat generator reaches the current DHW target value minus half the burner
switching differential.
The heating circuits will be enabled according to the following criteria:
Enabling the heating circuits:
HG actual temperature >DHW setpoint + DHW switching differential/2 + 10K
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Disabling the heating circuits:
HG actual temperature <DHW setpoint + DHW switching differential/2 + 5K
NOTE!
In this operating mode the loading temperature increase for the tank is to be
selected so that the heat generator does not switch off before the heating circuits are
enabled. A parallel shift of at least 10K should be set so that this function can
operate correctly.
Weather-responsive Parallel Mode
Above the set outside frost protection limit DHW heating is carried out in priority
mode; in case of active frost protection there is a switchover to parallel mode.
Priority Mode with Intermediate Heating
With this setting DHW loading is limited to a maximum of 20 minutes in order to
provide for a 10-minute long intermediate heating. The loading procedure is
continued at the end of the intermediate heating. DHW loading and intermediate
heating are carried out in an alternating order until DHW tank loading is finished.
Priority valve Switching
Tank loading is carried by means of a three-way changeover valve; the heating
circuit pump is also the DHW loading pump. At the end of the DHW loading and at
the expiry of the extended time the three-way valve is changed back to heating
mode.
The heating circuit pump is connected at output DKP and the three-way valve to
output SLP in this case.
External operation (Request does not act on heating generator and heating
circuit)
In external operation hot-water loading is switched only according to the set
switching differentials. There is neither a heat request to the heat generator nor tank
priority operation to the heating circuits. The parameters Boiler parallel shift, Tank
Discharge Protection, Pump Extended Running Time and Boiler Start-up Protection
do not act on the HW loading pump.
Tank Discharge Protection (parameter 08)
With discharge protection activated and a HW request present, the HW loading
pump enabled only when the temperature in the heat generator rises by more than 5
K above the actual temperature in the hot water tank.
This measure prevents any rear tank discharge through the heat generator. The HW
loading pump is disabled again as soon as the temperature difference between the
heat generator and the HW tank has dropped to less than 2 K.
NOTE!
The heat generator minimum temperature limit operates continuously to protect the
heat generator and blocks the DHW loading pump in case of temperatures below the
set value.
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CAUTION
Boiler Temperature
parallel shift:
SDC / DHC 43
In case of DHW temperature settings above 60°C this function should not be
activated to avoid safety switch-off (in particular for heat generators with a low
water capacity).
Tank Discharge Protection must be set accordingly for HW loading from buffer
tanks.
This function determines the default setting of the tank loading temperature
compared to the set DHW setpoint. In case of setpoint modifications the heating
energy needed for the DHW supply is adjusted.
In case of several controllers connected via bus and several DHW circuits the tank
loading temperature depends on the highest setpoint if several tanks are loaded
simultaneously.
Switching differential
This function determines the size of the DHW switching differential. The switching
differential affects the relevant DHW setpoint symmetrically.
Loading enabling
The current DHW temperature is lower than the DHW setpoint by half the amount of
the DHW switching differential.
Loading abort
The current DHW temperature exceeds the DHW setpoint by half the amount of the
DHW switching differential.
Extended Pump
running time
NOTE!
Tank sensor 2
See also
After switching-off the heat generator the tank loading pump is stopped only after a
time delay to prevent a safety switch-off in case of high temperatures. The setting
can be adjusted to the capacity of the DHW tank.
Excessively long overtravel times interrupt unnecessarily the heating mode and
increase the temperature in the hot water tank.
For complete loading of a hot-water tank by means of automatic measuring point
changeover between tank sensors 1 and 2 (layer loading). The measured value of
the hotter sensor (SF1 or SF2) is evaluated for the activation of the loading pump.
Termination of the loading is carried out on the basis of the measured value of the
colder sensor. The set values for the hot-water setpoint temperature and the
specified hot-water switching difference continue to apply.
5.6.3, Domestic Hot Water Parameter Menu (DHW)
7.3.5.2 Circulation pump (CIR.)
NOTE!
Function
Economy Interval (Pulse)
Economy Interval
(Period duration)
This function is callable only if a variable output is defined for a circulation pump.
The output controls a hot water circulation pump.
The use of the economy interval minimizes the usual circulation losses owing to
adjustable switch-on intervals during operating and determines the run time of the
DHW circulation pump within an adjustable period (economy interval).
This parameter determines the length of the period and hence the duration of the
pause in a circulation pump pulse operating mode.
Economy interval Pause = Economy interval Period duration – Economy interval Pulse –
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The switching-on degree is calculated from the ratio:
n = Pulse time/Period duration x 100 (%)
Example:
With an economy pause of 15 min and an economy period of 20 min, the circulation
pump will run for 5 min before the subsequent pause of 15 min.
The duty cycle n is calculated as: n = 5/20 = 25 %
Switching Times
In this function a DHW circulation pump can be coupled to an existing automatic
program of a control circuit with regard to the switch-on and switch-off times. The
DHW circulation pump is in function during the heating or DHW cycles of the
selected circuit and program.
NOTE
If operation of the time programs P2 and P3 were not enabled (see parameter
ZEITPROGRAMM on parameter level SYSTEM) and the circulation pump is
assigned to one of these programs, the pump will operate according to the stored
standard times. The same applies if a switching-time program was selected that
does not exist for the controller in use (e.g. a MK 2 for SDC 9-21).
Circulation pump
with district heating
7.3.5.2.1
HW parameter 16 allows switching off the circulation pump during HW loading.
Electrical Heating Element (ELH)
Function
The function controls indirectly (via circuit breaker) an electrical water heater if the
automatic summer switch-off is active.
An external DHW thermostat including the necessary safety installation will take care
of the switch off function.
7.3.6 Solar / Solid Fuel / Buffer
7.3.6.1 Solar Loading Pump (SOP)
Function
NOTE!
The solar function makes it possible to combine solar panels with heating and DHW
systems in order to support the economy of the system. The Solar loading pump can
be controlled according to various conditions.
This function is only active if a variable output is assigned to a solar loading pump.
Two separate sensor inputs are available for this function:
• SPFS for the solar panel flow temperature
• SBUS for the solar buffer tank
For heat metering a variable input (VI1..VI3) can be assigned for the solar panel
return sensor SPRS.
If the solar panel flow sensor is defect, the loading pump wiil be switched off for
safety reasons.
Switch on differential
With sufficient solar heat energy the temperature difference between panel flow and
solar buffer tank will become bigger than the adjusted value and the solar panel
pump is switched on to load the buffer tank. The minimum value is 3K above the
switch off differential.
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Switch off differential
If the temperature difference between panel flow and buffer tank falls below this
adjusted differential, the pump will be switched off and the loading terminated. The
maximum value is always 3K below the switch on differential.
Minimum running time
The solar pump remains running for this adjusted time. The minimum running time
has priority over the switch off differential.
Solar panel
maximum limit
Buffer maximum limit
Solar operating mode
This limit serves for the thermical protection of the solar panel/s. It activates the
panel pump if the adjusted temperature is exceeded. If the panel temperature falls
below the adjusted value again, then all solar functions and settings will be active
again.
If the temperature in the buffer tank exceeds this limit, then even the solar panel
maximum limit function will be deactivated so that the pump switches off. This
function can be activated again as soon as the buffer tank temperature falls more
than 10K below its maximum limit.
This function defines the loading mode:
Solar priority mode
During solar loading the heat demand is not sent to the heat generator when it is not
active. An active heat generator stays in operation until the next switch off cycle.
Solar parallel mode
During solar loading the demand to the heat generator is permitted.
Heat generator
temporary interruption
Switchover Parallel
Heat balance
Reset heat balance
Volume flow
Heat generator temporary interruption (only with solar operating mode = priority
mode)
The temporary interruption serves to prevent frequent switching between solar
loading and loading by the heat generator. After a solar pump switch-off the set time
has to pass before the solar buffer tank can be loaded again by the heat generator
(boiler).
Solar priority / parallel switchover (only with solar operating mode = priority mode)
When the temperature in the solar tank drops below the nominal value by this
temperature setting during priority solar loading, the system is automatically witched
to parallel operation (Temporary interruption disabled, heat generator enabled).
Priority mode is activated again as soon as the tank temperature rises above the
actual setpoint plus the HW switching differential.
Heat balancing is activated through this parameter setting. The user can select
between flow calculation via the pump running time and determination of the flow
volume via the pulse signal input of the device, if such input is available. Any
commercial flow meter can be connected to the pulse input.
(only if heat balancing is activated)
If the heat balancing is active, the counter can be reset with this parameter.
(only with Heat balancing enabled)
This setting allows choosing between volume flow computed in
• liters/minute for calculating the flow volume or
• liters / pulse when using the pulse input corresponding to the respective pumping
capacity of the solar loading pump.
NOTE!
Fluid density
EN2H-0221GE51 R1105
If the adjustment is 0, there is no heat balance.
(only if heat balancing is activated)
110
SDC / DHC 43
Hydraulic Components and their Functions
This parameter defines the fluid density according to the manufacturers data.
Fluid heat capacity
NOTE!
This parameter defines the specific heat capacity for the correct calculation of the
heat balance. The data is supplied by the fluid manufacturer.
The physical data Volume flow, density, and specific heat form the basis for the heat
output calculation.
W = (V / t) · ρ · cW · ∆δ · tSOP
The results can be seen in the information level.
W = Heat capacity
V/t = Volume flow of the heat carrier medium
ρ = Density of the heat carrier medium
cW = Specific heat capacity of the heat carrier medium
∆δ = Temperature difference (solar panel feed / return flow)
Anti blocking function
This is an automatic function of the controller. If the solar loading pump was
switched off for longer than 24 hours, then it will be started for 20 seconds in order to
prevent blocking through corrosion.
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7.3.6.2 Buffer Loading Pump (BULP)
NOTE
This function is only active if a buffer loading pump is assigned to a programmable
switching output or if a buffer tank sensor is connected to a variable input.
For stratified discharge, an optional second buffer tank sensor (PF 2) can be
connected at a variable input (VI1 to VI3).
The heat generator temperature is supplied by the temperature measuring device of
the heat generator.
Function
Buffer or energy tanks are used for storing energy that is available without control
(e.g. from solar equipment or wood boilers). This energy buffer covers he energy
demand from heating circuits and HW systems.
Additional energy demand can be covered by controlled heat generators (boilers).
The buffer loading pump function ensures that a controlled heat generator supplies
the additional energy to the buffer tank or the heating and hot-water circuits,
respectively.
If no controlled heat generator is used (e.g. heating by wood boilers only), buffer
functions such as forced dissipation into the heating circuits can be used by
connecting and activating buffer tank sensor 1 at a variable input.
Operating modes
To support the full range of available combination options in multivalent heating
systems with buffer support, the control system offers the possibility to set various
operating modes for buffer operation. The different settings cause different
processing sequences of heat requests for heating circuits and hot water. In the
following, the different operating modes are illustrated using exemplary hydraulics
layouts.
Operating mode 1 – Charging control HC and DHW requests
System hydraulics
VF2
VF1
AF
D KP
MK1
MK2
PF
SF
SLP
KF
BR 1
Heat
generator
Wärmeerzeuger
Buffer tank
Pufferspeicher
DHW
W arm
tankwasserspeicher
PLP
PF2
Heating-circuit and hot-water control send their demand value to buffer control.
Buffer control requests additional energy from the heat generator via the buffer
loading pump.
See the table below for detailed correlations.
EN2H-0221GE51 R1105
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Hydraulic Components and their Functions
Operating mode 2 – Loading control for HC request only
System hydraulics
VF2
VF1
AF
DKP
MK1
MK2
PF
KF
BR1
PLP
Heat
Wärmegenerator
Buffer tank
erzeuger
Pufferspeicher
PF2
SF
SLP
DHW tank
W arm wasserspeicher
The heating circuit controls send their demand value to buffer control. Hot-water and
buffer control request energy from the heat generator when required.
With Hot-water priority activated, this function acts on the buffer loading pump but
not on the heating circuits.
See the table below for detailed correlations.
Operating mode 3 – Discharge control HC and DHW requests
AF
VF1
VF2
DKP
MK1
MK2
PF
KF
SF
PLP
Buffer tank
Pufferspeicher
WärmeHeat
erzeuger
generator
BR1
SLP
DHW tank
W arm wasserspeicher
System hydraulics
HC and DHW controls send their demand values to buffer control. The BULP (PLP)
input switches ON when the energy demand can be met by the buffer. If the energy
in the buffer is insufficient, buffer control requests additional energy from the heat
generator and BULP (PLP) switches OFF.
BULP (PLP) is switched off when there is no request from the heating circuits and
from hot-water loading.
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SDC / DHC 43
See the table below for detailed correlations.
Operating mode 4 – Discharge control for HC requests only
System hydraulics
VF2
VF1
AF
DKP
MK1
MK2
PF
KF
Buffer tank
BR1
Pufferspeicher
Heat
generator
PLP
Wärmeerzeuger
SF
SLP
DHW tank
W arm wasserspeicher
As operating mode 3, except that the requests from DHW control are send directly to
the heat generator.
An active hot-water priority only acts on the heating circuits when there is no buffer
discharge in progress.
See the table below for detailed correlations.
EN2H-0221GE51 R1105
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Hydraulic Components and their Functions
Operating mode 5 – Loading control with DHW switchover
System hydraulics
VF2
VF1
AF
SF
ê
DKP
MK2
MK1
SLP
PF
KF
Heat
Wärmegenerator
PLP
Buffer tank
erzeuger
Pufferspeicher
PF2
THE HC controls send their demand values to buffer control. DHW and buffer
controls request energy from the heat generator when required. The BULP (PLP)
output is ON during buffer discharge and DHW loading.
Any active DHW priority is not effective in this mode.
Operating mode 6 – Discharge control to heat generator
System hydraulics
AF
VF1
VF2
DKP
MK1
PLP
MK2
KF
PF
SF
Buffer tank
Heat
generator
Wärmeerzeuger
BR1
Pufferspeicher
SLP
DHW
tank
W armwasser
-speicher
This hydraulic layout is used when an alternative-energy buffer tank is added to an
existing system. In such systems it is often the case that there are existing Unit
boilers with integrated DHW tank and DHW loading.
All heat requests are sent to the heat generator.
When the buffer tank can cover the energy demand, the heat generator nominal
temperature is maintained by the buffer, via BULP (PLP), instead of the burner.
In this way the heat generator always operates at its nominal temperature and can
not be exposed to excessive buffer temperatures.
See the table below for detailed correlations.
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Hydraulic Components and their Functions
Buffer request from
Heat generator request
from
Buffer control mode
Buffer start-up
protection acts on
Buffer discharge
protection
Buffer frost protection
monitoring
Buffer minimum
temperature monitoring
Buffer maximum
temperature monitoring
Buffer forced dissipation
into
Buffer skimming function
Loading temperature
control from
Heat generator start-up
protection on BULP
Function BULP without
request
Function BULP for
manual operation
Function BULP for
sensor defect
Function BULP for heat
generator disabled
SDC / DHC 43
1
2
HC/
HC
DHW
BUFFER BUFFER
/ DHW
Load
Load
Buffer operating mode
3
4
5
HC/
HC
HC
DHW
BUFFER
BUFFER/ BUFFER
DHW
/ DHW
Discharge Discharge
Load
1
1
HC/DHW
HC
HC
6
--HC/ DHW
Discharge
2
---
HC/
DHW
X
HC
X
---
---
X
---
X
X
---
---
X
---
X
X
---
---
X
---
X
X
X
X
X
X
HC/
DHW
X
HC/
DHW
X
HC
HC/ DHW
HC
HC
HC/ DHW
X*
HC
-----
-----
X*
HC
-----
X
---
---
X
---
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
---
---
ON
ON
---
---
Loading control
The supply of energy from a controlled heat generator to the heating circuits is
realized through loading the buffer tank. The buffer control ensures that the buffer is
supplied with sufficient energy from the heat generator, via the buffer loading pump.
Discharge control 1
The heating circuits are supplied with energy either from the buffer through
discharging the buffer tank via BULP, provided the buffer tank contains sufficient
energy, or through direct supply from the heat generator.
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NOTE
If a heat generator disable is active (e.g. through external burner disabling via
contact, temporary interruption (solid fuel/solar)), the energy contained in the buffer,
independent of the actual buffer level, is dissipated into the heating circuits by
enabling the buffer discharge channel (e.g. switching on the buffer loading pump or
switching over the BULP diverter valve). The buffer minimum temperature is
monitored. DHW loading is enabled under the conditions of buffer/tank discharge
protection.
Discharge control 2
The heating circuits are always supplied with energy from the heat generator. As
long as the buffer contains sufficient energy, the heat generator will be heated via
the buffer loading pump instead of the burner. If the energy in the buffer is not
sufficient, the burner will be started.
NOTE
Buffer nominal temperature
If a heat generator disable is active (e.g. through external burner disabling via
contact, temporary interruption (solid fuel/solar)), this will only result in the
suppression of the request to the burner.
The buffer nominal temperature is the temperature that the buffer tank has to provide
for supplying the connected heating circuits. It corresponds to the highest demand
value of the respective heating circuits.
Example:
Demand value MC-1 = 45 °C
Demand value MC-2 = 55 °C
Demand value DHW = 65 °C
=> Buffer nominal temperature = 65 °C
Any required temperature offset (e.g. hot-water parallel shift during loading) is
already taken into account in the demand values of the heating circuits.
Buffer minimum temperature When there is a heat request to the buffer tank from the heating circuits or from DHW
limit
this request will be maintained at least to the minimum temperature limit. When the
temperature drops below this limit, the buffer tank is recharged by the heat generator
under the conditions of the buffer start-up protection.
Buffer maximumtemperature limit
Buffer temperature
offset heat generator
Buffer switching differential
Buffer temperatures above the set buffer maximum temperature limit will trigger
a forced switch-off
Of the buffer loading pump. The excess heat is dissipated into the selected circuits
(see Forced dissipation). Forced dissipation is disabled and buffer operation is
resumed when the temperature in the buffer tank drops below 2 K under the set
maximum temperature limit.
to ensure an adequate control reserve for all consumers connected to the buffer
tank, the demand value sent to the heat generator can be raised by an additional
temperature offset.
When the buffer tank temperature rises above the actual demand value by the set
differential, the buffer loading pump will be switched off. The pump is switched on
again as soon as the buffer tank temperature drops below the actual demand value.
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Buffer forced dissipation
Possible settings
SDC / DHC 43
When the set buffer maximum temperature limit is exceeded, the excess energy can
be dissipated into the heating circuits and the hot-water tank. The heating circuits
into which the forced dissipation is routed are determined by the respective
parameter.
OFF
No heat dissipation
Tank loading pump
Only for independent DHW tanks
CAUTION
Thermal mixer valve at water heater outlet obligatory because of scalding
hazard.
Heating circuit pump(s)
Any excess heat is dissipated into the heating circuit(s), without exceeding the set
maximum temperature. The intended room temperature may be exceeded for short
periods. If the respective circuits are equipped with room stations, the thermostat
function should be activated.
CAUTION
For floor heating a contact thermostat must be installed to control forced
switch-off of the pumps.
Dissipation into buffer tank
Buffer skimming function
Whenever the buffer tank is not being loaded by the heat generator (buffer setpoint
reached) the difference between the heat generator temperature and the buffer tank
temperature is measured continuously (BS). The buffer loading pump is switched on
as soon as the temperature difference rises above the set extended-running switchon differential. The buffer loading pump is switched off immediately when the
temperature difference drops to the extended-running switch-off differential.
This skimming function ensures that excess energy in the heat generator (e.g. due to
extended heating) will not be lost.
Buffer start-up protection
In buffer operation there is no start-up protection for the heat generator acting on the
heating circuits. The start-up protection only acts on the buffer loading pump. When
buffer start-up protection is switched on and the buffer tank temperature drops below
the minimum temperature limit, all consumer circuits (HC, DHW) are separated
hydraulically (Pumps are switched off). The buffer start-up protection is disabled
(pumps are switched on again) when the buffer tank temperature exceeds the buffer
minimum temperature plus half of he buffer switching differential. All consumer
circuits remain in operation when buffer start-up protection is switched off.
Buffer start-up protection can be switched off.
Buffer discharge protection
EN2H-0221GE51 R1105
Buffer discharge protection disables the buffer loading pump until the heat generator
temperature has risen to more than 5 K above the buffer nominal temperature.
This function helps preventing rear buffer discharge though the heat generator. The
buffer loading pump is disabled again when the temperature difference between the
heat generator and the buffer tank is less than 2 K.
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Hydraulic Components and their Functions
Buffer tank sensor 2 (BS2)
Buffer tank sensor 2 (BS 2)
As an option, the buffer tank can be equipped with the second buffer sensor (BS2)
via the variable inputs, for stratified loading of the buffer tank. The buffer is loaded
through the active heat generator as soon as the higher temperature (of the two
sensor temperatures) drops below the set nominal value. Loading though the heat
generator is terminated when the lower temperature (of the two sensor
temperatures) has reached the nominal value plus the set buffer switching
differential (stratified loading)
7.3.6.3 Solid Fuel Loading Pump (SFP)
NOTE!
This function is only enabled, if a variable output is assigned to a solid fuel pump
The following sensors can be used for this function:
• SFS for the solid fuel boiler sensor
The connection is made according to the assignment to VI1 or VI2
• SFP for the solid-fuel buffer sensor (optional)
Connection according to assignment to any available variable input VI1 – VI3.
• If no SFP is connected, the SBUS signal (dedicated sensor input) is accepted as
a buffer sensor. In this way the SBUS input can be used as a sensor input for
several uncontrolled heat generators (e.g. solar or solid-fuel).
CAUTION
Note the sensor and stratification conditions.
A forced switch-on will be initiated for the solid fuel loading pump if a solid-fuel boiler
sensor is defective.
Function
The solid-fuel function allows integrating solid-fuel boilers (usually in combination
with a buffer tank) into the system to support the heating. Under this function the
solid fuel loading pump can be controlled through various switching conditions as
described in the following.
Solid fuel boiler low limit
If the temperature of the solid fuel boiler is 10 K higher than the low limit, the solid
fuel loading pump will be switched on, if it falls below the low limit, it will be switched
off.
Solid fuel boiler high limit
If the temperature of the solid fuel boiler is higher than the high limit, the solid fuel
loading pump will be forced to switch on. The excess heat will then be dissipated into
the selected (see menue buffer tank)circuits. This forced operation will be finished
and the temperature difference control enabled when the solid fuel boiler
temperature falls more than 10K below the high limit.
Solid fuel boiler,
temp. difference control
If the solid fuel boiler temperature increases above the buffertank + adjusted switch
on temperature difference, the normal buffertank loading process can start again.
Prerequisite:
The temperature of the solid-fuel boiler lies at least 10 K over the minimum
temperature limitation.
Adjusted temperature difference must be 3 K higher than switch off temperature
difference.
Solid fuel boiler, temp.
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SDC / DHC 43
difference for switch off
If the temperature difference is lower than the switch off difference, the loading
process will be terminated and the pump will be switched off. The maximum setting
value constantly lies 3 K under the selected activation difference in order to prevent
rear discharging of the buffer tank.
Temporary interruption
Solid-fuel temporary interruption heat generator
The solid fuel temporary interruption serves to prevent frequent switching between
loading through the solid-fuel boiler and loading through a conventional oil/gas heat
generator.
After the solid-fuel loading pump has been switched off, the set time must pass
before loading of the buffer tank is continued through the conventional heat
generator.
Solid fuel boiler,
anti blocking function
As an automatic function of the controller the pump will be switched for 20 sec if it
has not been in operation for more than 24h.
7.3.7 Solar loading switchover
In systems that have both an external hot water tank and a buffer tank, a diverter
valve can be used to switch between loading the hot water tank and loading the
buffer tank from solar equipment. This allows economical and effective use of solar
power to support the heating during periods when less solar power is available.
Description
Switchover
EN2H-0221GE51 R1105
To ensure that the solar collector in priority operation (temperature measurement
through SPFS, usually HW tank) can be loaded, checks are performed at regular
intervals whether sufficient solar power is available (meaning the solar panel
temperature is sufficiently high for loading and the set switchover temperature can
be reached).
This function allows switching a diverter valve according to the load condition of two
heat storage tanks (2-point output) so that solar energy can be used to support the
heating system during periods of low solar intake.
120
SDC / DHC 43
Measuring cycle
Hydraulic Components and their Functions
If the switchover condition is not fulfilled after a preset time interval of 30 minutes
(meaning the temperature in the first-priority tank remains below the set switchover
temperature) und if the loading conditions for the second-priority tank (temperature
measurement through SBUS, usually buffer tank for heating support) are fulfilled, the
solar loading pump (SOP) is temporarily switched off after the time set on Solar level
(parameter 15). During the inactive time of the pump the difference between the
solar panel flow sensor (SPFS) and the sensor for solar switchover (SLVS) is
determined. If the switch-on condition is fulfilled, the first-priority tank is loaded. If the
loading condition is not fulfilled after the set time, loading is continued into the lowerpriority tank as long as the loading conditions are not fulfilled.
These cyclic checks are suspended if the temperature at sensor SLVS plus the
switch-on differential becomes greater or equal the set final switch-off temperature.
Operation of Solar loading switchover
This function can only be set if a SOP is set on the Hydraulics parameter level.
7.3.8 Solar forced dissipation
Function
Description
This function allows preventing the degassing of the medium at high solar panel
temperatures in solar power systems. Such degassing can occur when solar heat
tank is full (maximum temperature exceeded) and, consequently, forced dissipation
into the heat tank is impossible. In this case the solar pump would be switched off
and the solar panel temperature would rise.
The function of the solar forced heat dissipation valve involves a forced switch-off of
the SOP when the final switch-off temperature is exceeded.
This function is independent of the assignment of a force-dissipation valve to a
variable output.
The final switch-off setting is independent of the preset solar panel maximum
temperature and can be lower than the latter. In this way there are independent
forced switch-on and forced switch-off functions for the SOP.
The Solar forced heat dissipation output is energized under the following conditions:
• Function enabled for solar tank temperatures in excess of the maximum
temperature.
• When the solar panel temperature rises above the set solar panel maximum
temperature the output is switched on while the solar loading pump continues
running.
• When the solar panel temperature rises above the set final switch-off temperature
the SFD output and the solar loading pump are switched off.
Operation
CAUTION
This function can be selected only if an SOP has been set.
When this function is active the solar loading pump continues running even
when the solar panel temperature exceeds the set solar panel maximum
temperature.
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SDC / DHC 43
7.3.9 Hydraulic buffer relief (HBR)
PF
BS
Buffer
Buffer
tank
spe
KSPF
SBUS
B
A
Function
Application
Hydraulic function
M
HPE
HB
AB
Using a 3-way switching valve, hydraulic buffer relief (HBR) causes temporary intake
into the upper region of the buffer tank, if that region has not reached its nominal
temperature yet, so that connected heating or hot water circuits receive priority
supply of energy.
When the buffer temperature exceeds the buffer setpoint by 2.5 K, the 3-way
switching valve is hydraulically coupled to the lower region of the buffer tank so that
the entire buffer tank can be loaded. Another switchover to the upper region of the
buffer tank is initiated as soon as the buffer temperature drops below 2.5 K under the
buffer nominal temperature.
Partial buffer loading with priority supply for heating and hot water for all types of
loading control modes (see buffer operating modes 1, 2 and 5)
When the output is inactive (de-energized), the buffer is fully loaded (valve position
A–AB, relief deactivated).
When the output is active (live), only the upper part of the buffer tank is loaded
(valve position B–AB, relief activated).
Switching differential SDHBR:
5 K (fixed)
Switch-on: Buffer setpoint + ½ SDHBR
Switch-off: Buffer setpoint - ½ SDHBR
7.3.10 Other System Components
7.3.10.1 Global Malfunction Message input
Function
EN2H-0221GE51 R1105
If the function is active, malfunction messages of any kind can operate this input .
(closed contact= malfunction) and serve as a global malfunction message input.
These messages will also be available on the bus system.
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Hydraulic Components and their Functions
There may be 3 different malfunction message inputs according to the assignment of
the 3 variable inputs.
7.3.10.2 Global Malfunction Message output
NOTE
Function
This function needs to be activated for a variable output (VO1 or VO2) in the
HYDRAULICS menu.
The function becomes active on detection of malfunction messages of any kind. It
serves as a global malfunction message output for connecting optical or acoustic
alarm signal devices.
7.3.10.3 Timer
NOTE
Function
Only active if parameter 05 (Output pump direct heating circuit) in the “Hydraulics”
parameter menu was set to 14.
The function can switch any device according to the current switching time program
of the direct heating circuit.
7.3.10.4 External switching modem
Function
Only active if setting 11 (external switching modem) was selected in the ”Hydraulic”
Parameter Menu under Parameter 08, 09 or 10 (variable inputs)
This configuration allows switching between operating modes through the telephone,
via a switching modem to be provided by the user (for holiday homes, etc.).
Assignment
A switching modem can be assigned to each of the three variable inputs (VI1...VI3).
If a variable input was assigned to this function the corresponding parameter for
allocating the switching modem to the respective heating circuit (same allocation
parameter and region as for Demand contact, meaning the modem acts either on the
direct heating circuit (DK), mixer circuit 1(MK-1), mixer circuit 2 (MK-2), Hot water circuit
(DHW), or on the entire system (ALL), i.e. on all controllers and central devices in the
data bus system.
The operating mode depends on the circuitry at the respective input, in the following
way:
Input VI1(2,3) open:
normal control (auto, reduced, heating, standby)
Input VI1(2,3) closed:
controller in standby, heating and DHW frostprotected
Input VI1(2,3) 2.2 kOhms:
continuous heating
Input VI1(2,3) 3.0 kOhms:
continuous reduced operation
NOTE
Only one modem may be connected to one variable input (VI1, VI2 or VI3) of the
control device.
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CAUTION
SDC / DHC 43
Close contact or resistor against controller ground only!
7.3.10.5 External information
Function
Only active if setting 12 (external information) was selected in the ”Hydraulic”
Parameter Menu under Parameter 08, 09 or 10 (variable inputs).
This function can be used to display a sensor value which is controller independent.
7.3.10.6 Demand Contact
NOTE!
Function
The function for a demand contact is active if setting 5 (demand Contact) was
selected at a variable input (”Hydraulic” Menu, Parameters 08, 09, 10).
If a variable contact (see note) has been defined as a demand contact, the
corresponding parameter for allocating the contact to the respective heating circuit
(i.e. the heating circuit to be addressed by the demand contact) is displayed in the
“System” menu.
The range of setting includes all control circuits within a controller (DK, MK-1, MK-2,
WW, ALL) so that the demand contact can be allocated either to each individual
heating and hot water circuit or, if required, to all circuits.
CAUTION
No multi-controller function for data bus systems with several central devices.
Operating modes and switching time settings are not effective when the demand
contact is active. The respective heating circuit only reacts to requests from the
demand contact.
The operating modes Manual, Emission measurement with STB check and Screed
function are of higher priority.
System information
An open demand contact is signaled by the string “Inhibit” in the Status display; a
closed contact is identified by the string “request”.
Contact function
A variable input that has been defined as a demand contact acts on the heating
circuit in the following way:
• Variable input open: no request
The heating circuit is switched of unconditionally (no frost protection, no Stand-by
function).
• Variable input shorted: request
The heating circuit is in operating mode HEATING (continuous heating operation)
und works according to its parameter settings.
EN2H-0221GE51 R1105
124
SDC / DHC 43
Hydraulic Components and their Functions
CAUTION
Customers must take appropriate frost protection measures for the respective
control circuit.
This function can be activated up to thee times (once for each available VI).
7.3.11 Bus Communication
7.3.11.1 Controller Bus Address
Function
The Smile control system makes it possible to extend 1 controller with additional 4
controllers in order to cover several heating and hot water circuits or several heat
generators (cascading).
Also sensors and wall units will be part of this system architecture.
The following illustration shows the maximum possible extension of the bus system.
These controllers are identified by a corresponding bus address which provides for
selective communication between the base unit and the interactive subunits via the
bi-directional data bus. Each subunit itself can transmit the data of a maximum of 3
room units (wall units) via the assigned bus address shown in the blow table:
NOTE!
Adress
Device type
Assignment
10
SDC/DHC43
Controller 1 as ”base unit”
20
SDC/DHC43
Additional controller 2
30
SDC/DHC43
Additional controller 3
40
SDC/DHC43
Additional controller 4
50
SDC/DHC43
Additional controller 5
Make sure that base unit controller is assigned address 10.
Bus adresses must only be assigned once.
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SDC / DHC 43
7.3.11.2 Control functions via the bus
7.3.11.2.1 Boiler corrosion protection
If the HG is working with boiler corrosion protection, then this status is sent to all
mixing circuits. These will then disable the circuits (valve close and pump off).
7.3.11.2.2 Indirect return temperature control
The HG in the ”base controller” sends its actual boiler data to each mixing circuit in
the system which can then activate an indirect return control.
7.3.11.2.3 DHW priority
Each controller can control a DHW loading. The priority status of each DHW loading
process is sent via bus to all mixing circuits within the system. E.g. If the loading is in
parallel mode, then all mixing circuits will stay in operation.
7.3.11.2.4 Heating demand
Each heating demand will be fulfilled by the ”base controller”. The highest demand
on the bus is used for the heat generator. Also a manual operation is regarded as
demand.
7.3.11.2.5 Clock synchronisation
The actual time(from the ”base controller”) will be sysnchronized in the complete
system.
7.3.11.2.6 Room temperature information
All wall units will send the assigned room temperature values to their heating circuits
7.3.11.2.7 Errors/ status indications
Errors and status indications will be sent from the controllers to the wall modules for
display.
7.3.11.2.8 Examples with several controllers
Example 1
EN2H-0221GE51 R1105
Heating system with 2 stage HG, DHW control, and 4 mixing circuits. The following
diagram shows the hydraulic system:
126
SDC / DHC 43
Hydraulic Components and their Functions
AF
Datenbus
Bus
SF
SLP
ZG 1/
VF1
MK1
ZG 1/
VF2
ZG 2/
VF1
ZG2/
VF2
MK2
MK3
MK4
DHW
W arm
wassertank
speicher
KF
Boiler
Heizkessel
BR1
BR2
The following components will be connected to the first controller with busadress 10:
•
•
•
•
•
•
•
Outdoor sensor
Stage 1 and 2 of the burner
Boiler sensor
DHW sensor
DHW loading pump
Mixing circuit 1
Mixing circuit 2
The following components will be connected to the second controller with
busadress 20:
•
•
Example 2
Mixing circuit 3
Mixing circuit 4
Heating system with 2 stage HG, 2 mixing circuits and 2 DHW controls (e.g. for a
semi detached house with one boiler only). The following diagram shows the
hydraulic system:
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EN2H-0221GE51 R1105
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SDC / DHC 43
Bus
AF
Datenbus
SLP
SLP
ZG 1/
V F1
SF
M K1
DHW
W arm
wassertank
speicher
ZG 2/
VF2
SF
DHW
W arm
wassertank
speicher
MK2
KF
Boiler
Heizkessel
BR1
BR2
7.3.11.2.9 Unrestricted use of SMILE gateway
From software version 2.1 the SMILE gateway can be used. For this, all central
devices within the bus system must have installed software version 2.1 or later.
Connected room devices too should run a software version as recent as possible.
Use of versions earlier than 2.1 can lead to restricted functionality of the system.
7.3.11.2.9.1 Correction of the heat generator according to the total flow temperature
Total flow sensor
The sensor connected at variable input VI-1(2,3) measures the total flow
temperature in thermohydraulic distributors or in the common flow.
The adjustment of the boiler temperature is controlled by the total flow sensor
instead of the boiler sensor while the boiler minimum and maximum temperatures of
the heat generator are still controlled by the boiler sensor.
EN2H-0221GE51 R1105
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Hydraulic Components and their Functions
7.3.11.3 Operation of wall devices
7.3.11.3.1 Operation of digital wall devices SDW 20
Function
BUSADDRESS
11
A digital wall device SDW 20 can be connected to the control device.
With a digital wall device remote control for a central device (e.g. from a living room)
is possible in addition to the room temperature detection. Settings can be carried out
for all the existing heating circuits.
The bus address of the wall device is used to specify on which heating circuit the
room sensor (room influence) is to act.
æ ç è é ê ë ì í
When an SDW 20 is connected for the first time to the bus system, the address is
selected for the heating circuit to which the SDW 20 is to be assigned (bus address).
DATABUS
MK-1
ZG-1
æ ç è é ê ë ì í
CAUTION
After the input has been confirmed, a feedback is output to which heating circuit (DK,
MK-1, MK-2) and which central device (ZG) the digital wall device has been
assigned.
Assignment is carried on the basis of the following table:
Address Address ZG
Assignment
11
10
ZG 1 – Direct heating circuit
12
10
ZG 1 – Mixing circuit 1
13
10
ZG 1 – Mixing circuit 2
21
20
ZG 2 – Direct heating circuit
22
20
ZG 2 – Mixing circuit 1
23
20
ZG 2 – Mixing circuit 2
31
30
ZG 3 – Direct heating circuit
32
30
ZG 3 – Mixing circuit 1
33
30
ZG 3 – Mixing circuit 2
41
40
ZG 4 – Direct heating circuit
42
40
ZG 4 – Mixing circuit 1
43
40
ZG 4 – Mixing circuit 2
51
50
ZG 5 – Direct heating circuit
52
50
ZG 5 – Mixing circuit 1
53
50
ZG 5 – Mixing circuit 2
Duplicate assignments of bus addresses are not allowed and will lead to data
transmission errors and, consequently, to control malfunctions of the heating
system.
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SDC / DHC 43
Changing a bus address
A bus address is can be changed at a later stage through the following procedure:
• Disconnect wall devices from the data bus line (disconnect plug connection at the
bottom of the device)
• Reconnect the wall device, holding the rotary-push button pressed down until the
address setting screen is displayed.
• Set and confirm the new bus address.
7.3.11.3.2 Operation with wall device SDW 10
Function
A wall device SDW 10 can be connected to the control device.
With an SDW 10 it is possible to detect the room temperature, to remotely adjust the
room setpoint temperature and to change the operating mode for a heating circuit
The settings only apply for the applicable heating circuit.
The bus address of the wall device is used to specify on which heating circuit the
room sensor and the adjustment of the operating mode are to act.
The connection is carried out via the data bus.
Setting the bus address
Detection of the current
room temperature
EN2H-0221GE51 R1105
The address of the SDW 10 is set by means of the rotating encoding switch in the
inside of the wall device in accordance with the subsequent table.
Address Address ZG
Assignment
0
Undefined
Undefined
1
10
ZG 1 – Direct heating circuit
2
10
ZG 1 – Mixing circuit 1
3
10
ZG 1 – Mixing circuit 2
4
20
ZG 2 – Direct heating circuit
5
20
ZG 2 – Mixing circuit 1
6
20
ZG 2 – Mixing circuit 2
7
30
ZG 3 – Direct heating circuit
8
30
ZG 3 – Mixing circuit 1
9
30
ZG 3 – Mixing circuit 2
A
40
ZG 4 – Direct heating circuit
B
40
ZG 4 – Mixing circuit 1
C
40
ZG 4 – Mixing circuit 2
D
50
ZG 5 – Direct heating circuit
E
50
ZG 5 – Mixing circuit 1
F
50
ZG 5 – Mixing circuit 2
The integrated room sensor determines the current room temperature for all the
room-temperature-related functions and transfers them to the central device every
20 s.
130
SDC / DHC 43
Hydraulic Components and their Functions
Operating mode
adjustment
The desired operating mode is selected with the key (keep pressed approx.
2–3 seconds) and indicated by the corresponding LED. As the key is pressed, the
operating mode is adjusted in the following sequence:
AUTOMATIC MODE – HEATING – REDUCED – AUTOMATIC MODE – ...
Automatic mode
Heating
Reduced
Room setpoint correction
After the operating mode has been adjusted, the new operating mode is transferred
to the central device. Only the operating mode of the heating circuit to which the
SDW 10 is assigned is adjusted.
The heating circuit is controlled constantly in accordance with the specification of the
automatic program P1 - P3 set in the central device plus or minus the room setpoint
correction at the rotary button.
The heating circuit is controlled constantly in accordance with the desired daytime
room temperature plus or minus the room setpoint correction at the rotary button.
The heating circuit is controlled constantly in accordance with the desired reduced
room temperature plus or minus the room setpoint correction at the rotary button.
The function depends on the setting in the parameter selection for the heating circuit,
REDUCED OPERATING MODE parameter.
The rotary button can be used to modify the room temperature set at the central
device by ± 6 K referenced to the central position.
Turn clockwise:
Turn anti-clockwise:
Operation indication
Temperature increase
Temperature decrease
The operation indication is realized by three LEDs. The possible states are listed in
the table below:
Operating mode/Function
Moon LED
Clock LED
Sun LED
Automatic
OFF
ON
OFF
Permanent heating
OFF
OFF
ON
Permanent reduced
ON
OFF
OFF
Starting-up phase
BRIEF
FLASHING
BRIEF
FLASHING
BRIEF
FLASHING
Error at address setting
FLASHING
ON
ON
Bus fault as well as
indication when parameters
are blocked
ON
FLASHING
ON
Party (can be set via ZG)
OFF
OFF
FLASHING
Absent (can be set via ZG) ) FLASHING
OFF
OFF
Holiday (can be set via ZG)
Flash
OFF
OFF
Definition:
Flashing
0.8 sec on and 0.8 sec off
Brief flashing
0.08 sec on and 0.7 sec off
Flash
0.08 sec on and 1.4 sec off
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SDC / DHC 43
The operation indication is updated immediately after adjustment when adjusted at
the SDC 10 and at the latest after about 20 s after adjustment when adjusted at the
central device.
NOTE!
In all the other operating modes not defined in the table above all the LEDs are
activated.
7.3.11.3.3 Bus privilege heating circuit
Function
Possible setting
Application
This setting serves to determine the privilege status of a room station connected to a
heating circuit. One parameter per available heating circuit is available for this
setting.
Simple access privilege
Only switching times and parameter of the own heating circuit can be read and
modified. On call-up, only the data for their own heating circuit are displayed for the
respective user.
Tenant status
Extended access privilege
This privilege status allows access to all heating circuits and to the hot water circuit
and their parameters and switching times within the respective central device
Application
NOTE
Landlord status
Once a room device is connected and registered via the data bus to the central
device, the central device automatically switches to remote operating mode! This is
necessary to ensure clear operation of the system with connected room devices.
7.3.12 Cascading of heat generators in the bus system
7.3.12.1 General description of cascading of control devices
Function
In its standard version the control system features the possibility to couple and
cascade several boilers in a simple way. Also, the cascade control is independent of
the type of heat generators to be combined. For instance, condensing boilers can be
easily combined with atmospheric gas boilers.
The system automatically recognizes a cascade by checking if several central
devices have programmed a heat generator, or if more than one condensing boiler is
connected to a central device. In cascade operation an additional cascade selection
level is displayed for handling the parameters in the central device assigned to bus
address 10.
NOTE
EN2H-0221GE51 R1105
Cascade operation excludes 2-stage boiler control. All available stages are switched
by the cascade management. Consequently, the respective parameters of the Heat
generator selection level are not available for settings. All controls are governed by
cascade control.
132
SDC / DHC 43
Hydraulic Components and their Functions
7.3.12.2 Functions of the cascade parameter
Switching differential:
Each heat generator has its own switching differential. The cascade switching
differential must be set in such a way that it is always wider than the switching
differential of any individual heat generator.
Switch-on delay:
The afterheating characteristics of the boilers must be taken into account when
rating the heating system. The cascade switch-on delay serves to adjust the system
to start-up delays of the individual boilers, i.e. when, after being enabled, the heat
generator delivers its energy into the system (start-up phase, run-in period). The
appropriate setting is the maximum delay time of the boilers in the system.
Switch-off delay:
This parameter controls the run-down of the heat generators to avoid that all heat
generators switch off at the same time when the set cascade switching differential is
exceeded. The setting has to be adjusted to the afterheating characteristics of the
heat generators.
Stage swap:
To ensure the balanced utilization of the heat generators within a cascade (cascade
stages), a running-time-dependent leading stage swap can be activated.
After the set operating time of the presently leading heat generator, the system
switches to the heat generator with the next higher bus address.
Stage swap can only be executed between several central devices. It cannot be
applied if several condensing boilers are switched by a single central device.
Leading stage:
NOTE
The leading cascade stage can still be set manually to any existing stage even when
automatic stage-sequence switching is disabled.
Changing the heat generator type within the central device under address 10 leads
to an automatic reset of the leading stage setting to the first heat generator.
7.3.12.3 Mode of operation of cascade control
7.3.12.3.1 Switch-on characteristics
The switch-on characteristics of a boiler stage is determined by the set switching
differential and the dynamic switch-on delay. The stage number is incremented only
when the following criteria are fulfilled:
BTact < BTnom – SD/2
t >= tswitch-on delay * (100 – (dFT * 100 / FTnom) ) / 100
Stagenumber = Stageselect
The actual boiler temperature BTact of the leading boiler or the total flow sensor
temperature FT has to have been below the boiler nominal temperature BTnom minus
half the switching differential SD for the time t, which has to be at least as long as
the calculated switch-on delay. Additionally, the requested stage number must have
been sent to central device10 as the active status response.
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SDC / DHC 43
7.3.12.3.2 Switch-off characteristics
The stage number is decremented again as soon as the temperature of the leading
boiler or of the total flow sensor exceeds the present nominal boiler temperature plus
half of the switching differential for at least the calculated switch-off delay time.
BTact > KTnom – SD/2 or BTact >= BTMAX
t >= tswitch-off delay * (100 – (dFT * 100 / FTnom) ) / 100
Stagenumber = Stageselect
7.3.12.3.3 Control characteristics
• The heat generator that was switched on last adjusts the system to the set
nominal temperature.
• All other heat generators operate at the set maximum temperature (base load).
• The boiler stage number can be reduced as soon as the adjusting stage has
withdrawn its request to the heat generator and the boiler temperature has risen
above the set nominal temperature plus the set switching differential.
• For each heat generator the displayed nominal temperature always is the
presently requested temperature to be adjusted to..
• A heat generator that is not available (malfunction, external inhibit or outside
temperature inhibit) is ignored within the stage sequence. The next available heat
generator will be switched on instead.
7.3.12.3.4 Behavior for special functions
Manual operation
Emission measurement
STB
The heating circuits of the control device in which manual operation was activated,
operate according to the HAND function. The set request value is forwarded to the
energy management module of cascade control, and adjusted to by the available
boiler stages.
This function works as described under “Emission measurement“, with the following
extensions:
• The effect on heating circuits is extended to all heating circuits of the system.
• Enabling of the heat generators (burner) is initiated at the same devices where
emission measurement was activated.
This function works as described under “STB check”, with the following extension:
As soon as an STB function is detected within the BUS system, all consumers
(heating circuits) are inhibited.
Emergency mode
The parameters of cascade control are determined in the central device with the bus
address 10. If that controller becomes unavailable due to some defect, the remaining
stages continue operating in an emergency mode. In this mode all heat generators
adjust to the same boiler nominal temperature (parallel operation). As soon as the
cascade manager comes back into operation, cascade control is reactivated
automatically.
Data transmission
To enable the cascade function to process fast switching events, the transmission of
he cascade data was given a higher priority. Consequently, the data transmission
from any device to the master device, and of the request values from the master to
the slaver devices, takes no longer than approx. 3 seconds.
EN2H-0221GE51 R1105
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Hydraulic Components and their Functions
7.3.13 Start-up, Maintenance and Troubleshooting Help
7.3.13.1 Automatic set functions
Function
The controllers have a built in function which neglects unused inputs and control
functions. Messages from these functions will not be displayed.
The AUTO SET function is only active at power up.
There are two possibilities of calling up the AUTO SET function.
Automatic call-up
If the commissioning date has not yet been stored, connected or disconnected
sensors are registered automatically whenever the control device is switched on.
Error and fault messages of sensors (short-circuit interruption) are suppressed in this
period. After the commissioning date has been saved, a change in the sensor
configuration is only still possible after the manual Set function. The AUTO SET
function can be enabled at any time again for a day (day change) by the parameter.
Manual call-up
Manual call-up of the AUTO SET function is always possible. The call-up is activated
by pressing the pressure rotary transducer during the version display until the AUTO
SET function is shown in the display. The basic display is activated after the function
has been carried out.
A change in the function assignment by the AUTO SET function is only carried out
depending on the following inputs and selected configuration:
Input
Outdoor sensor
Flow sensor 1
Flow sensor 2
Tank sensor
Boiler sensor
Only executed if:
(AF)
(VF1)
(VF2)
(SF)
(KF)
MK1:
MK2:
SLP:
BR:
OFF / Mixer circuit valve
OFF / Mixer circuit valve
OFF / Tank loading pump
OFF / Single-stage
The current setting values are checked beforehand so that the configuration carried
out is not maladjusted by the AUTO SET function. A change is only carried out if one
of the settings specified above is applicable. This ensures that the AUTO SET
function cannot, for example, ever log off a return increase at the MK2 or re-function
it into a mixer heating circuit.
7.3.13.2 Emission Measurement (not for DHC43)
By pressing this key, the heat generator is controlled for 20 minutes according to the
maximum temperature limit. The remaining time is displayed as it elapses.
In case of two stage heat generators both stages are operative (measurement with
standard heat output).
Function
The heat generator is controlled to Heat generator maximum temperature. All
heating circuits as well as DHW adjust to their respective maximum temperature.
WARNING
There is danger of scalding because the DHW temperatures may rise above
the DHW setpoint
Application
Emission measurement via chimney sweep
135
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
Termination
Safety check
Function
LIMITER TEST
Application
Termination
SDC / DHC 43
Emission measurement can be terminated in any moment in advance with the ¡
key.
(Safety temperature limiter check – to be performed only by the technician)
By keeping the rotary pushbutton pressed during an emission measurement the
integrated heat generator maximum temperature limit is bypassed, the heat
generator remains in function continuously until the triggering of the safety
temperature limiter (SLT).
During the SLT check all the loads are separated from the heat generator, i.e. any
available mixing valve is closed and all the heating and DHW loading pumps are put
out of function.
The emission measurement is continued from the moment of the termination with the
previously saved residual time.
SLT check by the heating technician
Release the rotary pushbutton – the emission measurement still active is stopped
with the ¡ key.
7.3.13.3 Relay / Function Test
Function
Depending on the controller version various outputs can be tested. This is not only a
relay test, but a function test by means of which the hydraulic components are
tested. The partially compulsory sequence of the switching procedures is
considered.
After selecting the test function the relevant relays can be switched one after the
other by pressing the rotary pushbutton î in the specified switching sequence.
Heat generator
Heat Generator Test
Single stage Heat generator
(5.6.6 Heat Generator Menu, Parameter 1 = 1)
Switching sequence:
OFF, ON, OFF...
2-stage Heat generator
(5.6.6 Heat Generator Menu, Parameter 1 = 2)
Switching sequence: OFF, STAGE 1, STAGE 1+2, STAGE 1, OFF.....
2x1-stage Heat Generator
(5.6.6 Heat Generator Menu, Parameter 1 = 3)
Switching sequence:
OFF, HG 1, HG 1+2, HG 2, OFF.....
Modulating mode
(Menu "Heat generator" parameter 1 = 4)
Switching sequence:
Pumps / VA’s
EN2H-0221GE51 R1105
OFF, ON, OPEN, STOP, CLOSED, OFF ...
Pump Test
(Direct circuit pump, mixing circuit pump, DHW loading pump, variable output 1,
variable output 2)
136
SDC / DHC 43
Hydraulic Components and their Functions
Switching sequence:
Actuators
OFF, ON, OFF, ....
Mixing Circuit Actuator Test
Switching sequence:
STOP, OPEN, STOP, CLOSED; STOP....
7.3.13.4 Malfunction Messages
Function
The control unit has a malfunction message log in which a maximum of five
malfunction messages can be saved. The malfunction messages are displayed with
the date, time and malfunction type (error number); the query is carried out in the
sequence of the entered malfunction messages in the ”Malfunction Message” Menu.
The last (= most recent) malfunction message is in first position (No. 01); the
previous malfunction messages are shifted down by a position upon each new
malfunction message. The fifth malfunction message is deleted when a new
malfunction message appears.
There are 4 different types of messages:
Sensor alarm messages
HG alarm messages
Logical alarm messages
Bus alarm messages
Sensor values which are not in their respective measuring range will either be
sensor breaks or sensor short circuits. Depending on the type of sensor the
indication will be between 10 and 20 and the index 0 for short circuit or 1 for break.
These messages depend on the actual switching conditions and the indication will
be between 30 and 40, index 0,1 or 2
These messages will react on the actual control result. They appear between 50 and
60 with Index 0,1 or 2
Logical alarm messages can be disabeled with a special parameter.
These messages display adress problems like double adresses, not recognizing
adresses, etc. They appear with code 70 and Index 0 or 1.
Alarms will be indicated:
•
•
•
•
•
In the controller display
In the INFO menue
Malfunction message log
If active through an assigned output
Via bus
Alarm messages
Alarm type
Component
Alarm cause
Alarm-code
System
Outdoor sensor
break
10-0
System
Outdoor sensor
short circuit
10-1
System
Boiler sensor
break
11-0
System
Boiler sensor
short circuit
11-1
System
Flow sensor 1
break
12-0
MCP=off, actuator=off
System
System
Flow sensor 1
DHW sensor
short circuit
12-1
MCP=off, actuator=off
break
13-0
System
DHW sensor
short circuit
13-1
137
Remarks
EN2H-0221GE51 R1105
Hydraulic Components and their Functions
SDC / DHC 43
Alarm messages
Alarm type
Component
Alarm cause
Alarm-code
System
VI 2
break
14-0
System
VI 2
short circuit
14-1
System
VI 2
alarm
14-7
System
VI 3
break
15-0
System
VI 3
short circuit
15-1
System
VI 3
alarm
15-7
System
VI 1
break
16-0
System
VI 1
short circuit
16-1
System
VI 1
alarm
16-7
System
Solar buffer tank sensor break
17-0
System
Solar buffer tank sensor short circuit
17-1
System
Flow sensor 2
break
18-0
MCP=off, actuator=off
System
System
Flow sensor 2
short circuit
18-1
MCP=off, actuator=off
Solar panel sensor
break
19-0
System
Solar panel sensor
short circuit
19-1
System
Room sensor (RSC/RS) Interruption
20-0
System
Room sensor (RSC/RS) Short circuit
20-1
logical
Burner 1
No switch off
30-2
logical
logical
Burner 1
No switch on
30-3
Burner 2
No switch off
31-2
logical
Burner 2
No switch on
31-3
System
System
Heat meter
Flue gas temperature
No impulse
exceed
32-3
33-5
System
Flue gas temperature
SLT activated
33-8
logical
Boiler temperature
Not reached
50-4
System
logical
Boiler temperature
exceed
50-5
DHW temperature
Not reached
51-4
logical
Flow temperature MC1
Not reached
52-4
logical
Flow temperature MC2
Not reached
53-4
logical
Room temperature HC
Not reached
54-4
logical
Room temperature MC1 Not reached
55-4
logical
Room temperature MC2 Not reached
56-4
System
Address
Address collision 70-0
System
activity
No bus signal
System
EEPROM
71-0
System
EEPROM defect
71-1
System
fault
Locking
EnXX
Faulty ignition controller
System
fault
Blocking
BnXX
Faulty ignition controller
EN2H-0221GE51 R1105
138
Remarks
70-1
SDC / DHC 43
Hydraulic Components and their Functions
Malfunction message register The control device features a malfunction message register in which up to 5
malfunction messages can be saved. The messages are displayed with date, time
and malfunction type (alarm code). The stored malfunction messages can be called
up in inverse chronological order in the “Malfunction messages” menu.
The last (= most recent) is at the top of the list (no. 01), with all previous messages
shifted back by one place with each new incoming entry. The fifth malfunction
message is deleted whenever a new malfunction message arrives.
In case of a heat generator malfunction (alarm code 30-1 or 31-3) while the system
frost protection is active, the boiler start-up protection is switched off and the heating
circuit pumps are switched on to reduce the risk of freezing of the system.
7.3.13.5 Sensor Calibration
Function
If the measured values of the connected sensors do not match the actual
temperatures, calibration of the sensor values is possible with the ”Sensor
Calibration” parameter menu. In this menu all the sensors connected to the controller
can be corrected by ± 5K compared to the factory calibration value.
The current measured value plus or minus the specified correction as well as the
new value appear on the display. The compensation steps amount to 0.5 K.
CAUTION
The sensor circuits are adjusted at the factory with precise measurement
instruments. An adjustment is to be carried out only if it is determined that the
amount of the deviation is constant along the entire measurement range.
In case of the calibration of a sensor the relevant amount must be
unconditionally registered, as the factory setting is no longer valid and the
reference value is otherwise lost.
The original factory setting cannot be restored by means of a reset!
Application
– Compensation for very long sensor lines
– Constant external temperature effect on the sensor
– Sensor outside of the tolerance range (>1%)
7.3.13.6 Controller global reset
A global reset can be performed to return the controller to its factory condition. In this
reset all parameters, settings und counters accessible though the enabled code are
reset. The controller is restarted.
Settings which are not accessible through the set access code are preserved.
Activation
Simultaneous pressing of keys ¢, ¥, ¦ and §
7.3.13.7 Controller time correction
In some special cases it may become necessary to adjust the running time of the
clock integrated in the controller. Please contact the manufacturer if such case
occurs.
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EN2H-0221GE51 R1105
Technical Data
SDC / DHC 43
8 Technical Data
8.1
General
Power supply voltage:
230 V +6%/ -10%
Rated frequency:
50 ... 60 Hz
Power input:
max. 5.8 VA
Recommended pre-fuse:
max. 6.3 A slow
Output relay contact load:
2 (2) A
Bus interface:
for the connection of external devices (wall units, PC,
modem or gateway)
Max. bus length
100m
Power supply via T2B bus:
12 V/ 150 mA
Ambient temperature:
0 ... +50 °C
Storage temperature:
-25 ... +60 °C
Degree of protection:
IP 30
Protection class according to EN 60730:
II
Protection class according to EN 60529:
III
Radio protection:
EN 55014 (1993)
Interference immunity:
EN 55104 (1995)
CE compliance:
89/336/CEE
Casing dimensions:
144 x 96 x 75 mm (W x H x T)
Casing material:
RED with antistatic agent
Connection system panel version:
Plug-in terminal connections
Connection system wall version:
Spring terminals in wall socket
8.1.1 Installation recommendations
Mains power cables
(mains connection cord, burners, pumps, actuator motors):
Cross section
1.5 mm²
Maximum length
unlimited within the building mains installations.
Safety low voltage cables
(sensors, ext. switches for requests via switching contact, modem cables, analog signal cables, etc.)
Cross section
0.5 mm²
Maximum length
100 m (double wire); longer connecting cables should be avoided to
prevent the risk of electromagnetic interference.
Data bus cables
Cross section
0.6 mm ²
Maximum length
50 m (double wired; longest distance between a central device and a
device to be served); longer connecting cables should be avoided to
prevent the risk of electromagnetic interference.
Recommended cable types
J-Y(St)Y 2 x 0.6
EN2H-0221GE51 R1105
140
SDC / DHC 43
8.2
Technical Data
Sensor Resistance Values
Sensor resistance Honeywell NTC 20 kΏ sensors for AF, WF/KF, SF,
VF1, VF2, VE1, VE2, VE3, KSPF
°C
kΏ
°C
kΏ
°C
kΏ
°C
kΏ
-20
220.6
0
70.20
20
25.34
70
3.100
-18
195.4
2
63.04
25
20.00
75
2.587
-16
173.5
4
56.69
30
15.88
80
2.168
-14
154.2
6
51.05
35
12.69
85
1.824
-12
137.3
8
46.03
40
10.21
90
1.542
-10
122.4
10
41.56
45
8.258
95
1.308
-8
109.2
12
37.55
50
6.718
100
1.114
-6
97.56
14
33.97
55
5.495
-4
87.30
16
30.77
60
4.518
-2
78.23
18
27.90
65
3.734
Resistance values PT 1000-sensors for VI1 (adjustment AGF), KVLF
°C
Ώ
°C
Ώ
°C
Ώ
°C
Ώ
0
1000.00
80
1308.93
140
1535.75
280
2048.76
10
1039.02
85
1327.99
150
1573.15
300
2120.19
20
1077.93
90
1347.02
160
1610.43
320
2191.15
25
1093.46
95
1366.03
170
1647.60
340
2261.66
30
1116.72
100
1385.00
180
1684.65
360
2331.69
40
1155.39
105
1403.95
190
1721.58
380
2401.27
50
1193.95
110
1422.86
200
1758.40
400
2470.38
60
1232.39
115
1441.75
220
1831.68
450
2641.12
70
1270.72
120
1460.61
240
1904.51
500
2811.00
75
1289.84
130
1498.24
260
1976.86
8.3
Sensor measuring ranges
Name
Abbrev. on
controller back
Sensor type
measuring
range
Outdoor sensor
AF
Honeywell NTC 20 kΏ
-50 °C ... 90 °C
Boiler sensor
KF
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
Flow sensor 1
VF1
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
Flow sensor 2
VF2
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
DHW sensor
SF
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
Solar panel sensor
KVLF
PT1000
-50 °C ... 500 °C
Solar buffer tank sensor
KSPF
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
Variable input VI1 *)
VE1
Honeywell NTC 20 kΏ
PT1000
-50 °C ... 125 °C
-50 °C … 500 °C
141
EN2H-0221GE51 R1105
Technical Data
SDC / DHC 43
Variable input VI2
VE2
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
Variable input VI3
VE3
Honeywell NTC 20 kΏ
-50 °C ... 125 °C
8.4
Digital inputs
Name
Abbrev. on
controller back
Input type
Measuring
range
Puls counter
Imp
Low voltage
≤ 10 Hz
Op. Hours counter
BZ1
230 V
OFF, ON
BZ2
230 V
OFF, ON
stage 1
Op. Hours counter
stage 2
EN2H-0221GE51 R1105
142
SDC / DHC 43
Index
Index
A
F
ABS 49, 92
Absence Mode 18
Anti-blocking Protection 69
Automatic Mode 19
Fixed Value Control 96
Flue gas temperature limit 78
Flue gas temperature monitoring 78
Forced dissipation heat generator 78
B
G
Boiler circuit pump 87
Buffer discharge protection 118
Buffer forced dissipation 118
Buffer minimum temperature limit 117
Buffer nominal temperature 117
Buffer Overview 60
Buffer skimming function 118
Buffer start-up protection 118
Buffer stratified loading 119
Buffer switching differential 117
Buffer tank function 112
Buffer Tank Loading Pump 112
Buffer tank maximum temperature limit 117
Buffer tank sensor 2 119
Buffer temperature offset heat generator 117
Building Type 66
Bus Address 125
Bus privilege heating circuit 132
Bypass pump 89
Global Malfunction Message 122
H
Heat Generator Maximum Limit 71
Heat Generator Minimum Limit 70
Heat Generator Overview 57
Heat Generator Sensor Operating Mode 71
Heat Generator Start-up Protection 70
Heat Generator Start-Up Protection 70
Heating Characteristic Curve 90
Heating Characteristic Curve Setting 22
Heating Circuit Overview 55, 56
Heating Circuit Pump Overtravel 94
Heating circuits minimum temperature limit 71
Heating Curve 91
Heating System 49
Holiday Mode 17
Hot Water Heating 105
Hot Water Mode 106
Hot Water Overview 54
Hydraulic buffer relief 122
C
Cascading 132
Charging pump 86
Circulation pump 108
Climate Zone 67
Code Input 29
Conditional Priority 106
Constant Heating Mode 21
Constant Reduced Mode 21
Constant Temperature Control 96
K
KP Flow time 87
KP Overtravel Time 87
L
Language 43
Legionella Protection-Daytime 48
D
M
DATA BUS Overview 61
Daytime Room Temperature 14
Daytime Water Heater Temperature 15
Demand Contact 124
Malfunction Messages 50, 137
MALFUNCTION MESSAGES Overview 62
Manual Mode 28
Menu Selection 30
Minimum Burner Run time 72
E
N
ECO 49, 92
Electrical Heating Element 109
Electromagnetic compatibility (EMC) 7
Emission Measurement 29, 135
Extended running time CHP 86
Night-time Room Temperature 15
O
Operating Mode 45
Operating Mode Setting 16, 18, 19, 20, 21, 22
143
EN2H-0221GE51 R1105
Index
SDC / DHC 43
Stage-II enabling mode 74
Standby Mode 22
STB Check 136
Stufe II-Zeitsperre 73
Summer Mode 20
Summer Switch-off 67
Summer Switch-off/ Heating Limit 46
Switching differential I 72
Switching differential II 72
Switching Times 32
Switch-off Mode 92
Switch-on Optimisation 99
System Anti-freeze Protection 68
System Information 23
System Parameter Overview 53
Outside Temperature Measurement 66
Overview of the Technician Parameters 51
P
Parallel Mode 106
Parameter Presettings 65
Parameter Reset 47
Party Mode 19
Priority Mode 106
Priority Separate Switching 107
R
Reduced Mode 48, 92
Relay Function Test 136
RELAY TEST Overview 61
Return control 88
Return Increase Overview 59
Room Anti-freeze Limit 101
Room Factor 98
Room Influence 97
Room Switch-In 97
Room Thermostat Function 101
Rotary pushbutton 14
T
Tank Discharge Protection 107
Technical Data 140
Temperature Limitation 93
Temperature Rise 94
Thermostat 106
Time / Calendar Menu 32
Time Programs 43
Timer 123
Total flow sensor 128
S
Screed function 94
Sensor Calibration 139
SENSOR CALIBRATION Overview 62
Solar forced heat dissipation 121
Solar heat balance 110
Solar heat generator temporary interruption 110
Solar Loading Pump 109
Solar loading switchover 120
Solar Overview 59
Solar volume flow 110
Solid Fuel Loading Pump 119
Solid Fuel Overview 60
Solid-fuel temporary interruption 120
Stage II DHW loading mode 74
EN2H-0221GE51 R1105
U
User Interface 13
V
Variable Inputs and Outputs 66
W
Water Heater Economy Temperature 48
Weather-responsive Parallel Mode 107
144
SDC / DHC 43
Index
145
EN2H-0221GE51 R1105
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized
Representative:
Honeywell GmbH
Böblinger Straβe 17
D-71101 Schönaich
Tel.: (++49) (0) 7031 637 01
Fax: (++49) (0) 7031 637 493
http://europe.hbc.honeywell.com
The right is reserved to make
modifications
This document is definitive for the enclosed product and replaces all previous publications.
Honeywell Inc. hereby declares that this device complies with the basic requirements and other relevant regulations of guideline 1999/5/EC. The
declaration of conformity of the product can be requested from the manufacturer.
Note to non-EU countries: This product may only be used if operation in the 868 MHz frequency band is permissible.
GE2H-0221GE51 R1105