Download Carrier AQUAZONE 50PEC09-18 Product data

Product
Data
Aquazone™
50PEC09-18
Water Source Heat Pumps Console Unit
with Puron® Refrigerant (R-410A)
3/
4
to 11/2 Nominal Tons
TM
Single-package console water source
heat pump with self-contained line
voltage thermostats.
• Suitable for either geothermal or
boiler/tower applications with
operating temperature range from
25 F to 110 F
• Flexible and reliable multiple
protocol WSHP Open controller can
use BACnet*, Modbus†, N2, and
LonWorks** protocols for integrating
energy efficiency and precise unit
control
• Thermostatic expansion valve (TXV)
• Rubber grommet mounted
compressors for quiet operation
• Sloped top cabinet
• Right or left hand piping connection
• Multiple unit-mounted and remote
thermostat options
• Adaptable cabinet and subbase
configurations
• Non-ozone depleting Puron
refrigerant (R-410A)
Features/Benefits
Carrier’s Aquazone console
water source heat pumps are
a flexible, attractive
alternative for all finished
interior space, under-window
style installations.
Operating efficiency
Aquazone water source heat pump
(WSHP) units are designed for quality
and performance excellence over their
lifetime. Units offer standard cooling
EERs (energy efficiency ratios) up to
13.3 for boiler/tower systems and as
high as 22.3 for geothermal applications. Heating COPs (coefficients of
performance) are as high as 4.6,
among the highest in the industry.
© Carrier Corporation 2015
Form 50PEC-10PD
Features/Benefits (cont)
Quiet operation
The Carrier console WSHP provides
exceptionally quiet operation for maximum comfort.
Design flexibility
Aquazone™ console WSHP units are
offered in 4 capacity sizes to meet individual zone needs efficiently and effectively. Extended operating range units
are standard to suit a variety of application requirements.
Safe, reliable operation
Standard safety features include: high
and low pressure monitoring and field
selectable water and air coil freeze protection sensing. All safety controls may
be reset at the thermostat. Each unit is
tested and run at the factory to ensure
proper operation of all components
and safety switches.
All components are carefully
designed and selected for endurance,
durability, and carefree day-to-day
operation.
The water-to-refrigerant heat
exchanger has copper inner and steel
outer tubing which is painted on the
outside to provide corrosion resistance
protection. Cupronickel heat exchangers are available and should be used on
all open loop applications.
Units are rated and certified in accordance with AHRI (Air-Conditioning,
Heating, and Refrigeration Institute)/
ISO (International Organization for
Standardization)/ASHRAE (American
Society of Heating, Refrigerating and
Air-Conditioning Engineers) 13256-1
performance standard, and are CSA
(Canadian Standards Association)/
NRTL (Nationally Recognized Testing
Lab) listed.
Installation ease
The unit is packaged for simple, low
cost handling, with minimal time required for installation. The console unit
arrives at the jobsite fully assembled to
minimize installation time and reduce
installation cost. All units are pre-wired
and factory charged with Puron® refrigerant (R-410A).
Water connections are available in a
variety of configurations direct from
the factory. The standard configuration
is 5/8 in. OD sweat connections for
maximum flexibility in the field.
The standard electrical connections
are made quickly and directly to a power distribution terminal block. To further improve installation efficiency, a
fused or unfused disconnect switch, as
well as a 20 amp plug and cord, are
available as factory-installed options.
A 3/4 in. ID vinyl condensate connection is provided for connection to
the field-installed condensate line.
Compact cabinet design dimensions are 12 in. deep, 48 in. wide and
24 in. tall. For flexibility, the controls
can be mounted on the top right or left
side. Additionally, the sloped top design discourages the use of the unit as
a shelf, preventing air blockage and
any spills from damaging the unit.
No-fuss maintenance and
serviceability
Large service access panels enable
quick inspection for problem solving
and the control box swings down for
easy access to the controls.
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
AHRI/ISO Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-20
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-25
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-28
2
Fan motor sleeve bearings are permanently lubricated. If the unit requires
service, an easily removable cabinet
and slide-out fan section make access
simple.
Units are equipped with easily accessible service access ports on both
the suction and the discharge refrigerant lines for on-site testing and refrigerant recovery. Filter racks provide
easy filter access for cleaning.
Maximum control flexibility
Aquazone water source heat pumps
provide reliable control operation using
a standard microprocessor board with
flexible alternatives for many direct
digital controls (DDC) applications
including open protocol systems.
Carrier’s Aquazone unit solid-state
control system, the Complete C, provides control of the unit compressor,
reversing valve, fan, safety features,
and troubleshooting fault indication
features. The Complete C control system is a user friendly, low cost, advanced WSHP control board. Many
features are field selectable to maximize flexibility in field installation. The
overall features of this control system
include:
40-va transformer — Assists in
accommodating accessory loads.
Anti-short cycle timer — The timer
provides a minimum off time to prevent the unit from short cycling. The
5-minute timer energizes when the
compressor is de-energized, resulting
in a 5-minute delay before the unit can
be restarted. Thus, it prevents short
cycling of the compressor.
Random start relay — The random
start relay provides a random delay in
energizing each different WSHP unit.
This option minimizes peak electrical
demand during start-up from different
operating modes or after building
power outages. The control features a
5 to 80 second random start upon
start-up.
High and low pressure refrigerant
protection — Safeguards against
unreliable unit operation and prevents
refrigerant from leaking.
Condensate overflow sensor —
Electronic sensor mounted to the drain
pan. When condensate pan liquid
reaches an unacceptable level, the unit
is automatically deactivated and placed
in a lockout condition. The sensor
recognizes 30 continuous seconds
of overflow as a fault condition.
High and low voltage protection —
Safety protection for excessive or low
voltage conditions.
Automatic intelligent reset — Unit
shall automatically restart 5 minutes
after shutdown if the fault has cleared.
Should a fault occur 3 times sequentially, lockout will occur.
Accessory output — In applications
such as variable speed pumping, a
24-v output cycles a motorized water
valve or damper actuator with
compressor.
Performance monitor (PM) — This
feature monitors water temperatures to
warn when the heat pump is operating
inefficiently or beyond typical operating range. A field selectable switch initiates a warning code on the unit
display.
Water coil freeze protection
(selectable for water or antifreeze) — Field selectable switch for
water and water/glycol solution systems initiates a fault when temperatures exceed the selected limit for
30 continuous seconds.
Air coil freeze protection (check
filter operation) — Field selectable
switch for assessing excessive filter
pressure drop initiates a fault when
temperatures exceed the selected limit
for 30 continuous seconds.
Alarm relay setting — Selectable
24-v or pilot duty dry contact provides
remote alarm activation.
Service Test mode with diagnostic
LED (light-emitting diode) — Test
mode allows service personnel to
check the operation of the WSHP
and control system efficiently. Upon
entering Test mode, time delays speed
up, and the Status LED flashes a code
indicating the last fault. This mode
provides an easy fault diagnosis, based
on the fault code that the status LED
flashes. Carrier-provided troubleshooting tables provide an easy reference to
typical problems.
LED visual output — An LED panel
indicates high pressure, low pressure,
low voltage, high voltage, air/water
freeze protection, condensate overflow, and control status.
Puron® refrigerant (R-410A)
Puron refrigerant (R-410A) is a nonchlorine based enviromentally balanced, non-ozone depleting refrigerant. Puron refrigerant characteristics,
compared to R-22, have:
• Binary and near azeotropic mixture
of 50% R-32 and 50% R-125.
• Higher efficiencies (50 to 60%
higher operating pressures).
• Virtually no glide. Unlike other
alternative refrigerants, the two
components in Puron refrigerant
have virtually the same leak rates.
* Sponsored by ASHRAE (American Society of
Heating, Refrigerating and Air-Conditioning
Engineers.
† Registered trademark of Schneider Electric.
** Registered trademark of Echelon Corporation.
3
Model number nomenclature
50PEC 12
X
A
U
E 3
A 1
A 1
Factory Installed Options
50PEC – Aquazone™ High Efficiency
Water Source Heat Pump Console Unit
with Puron® Refrigerant (R-410A)
09
12
15
18
– 3/4
– 1
– 11/4
– 11/2
Water Circuit Options
A – 5/8 in. Sweat, Right
H – 1/2 in. FPT Fitting, Right
T – 1/2 in. FPT Fitting, Left
X – 5/8 in. Sweat, Left
Cabinet and Subbase Options
A – Standard 63 in. Cabinet and Subbase
T – No Cabinet and Standard Subbase
X – Standard 48 in. Cabinet and Subbase
W – No Cabinet and No Subbase
L –
R –
U –
W–
Standard C Microprocessor Control Package with Remote Thermostat
Deluxe D Microprocessor Control Package with Remote Thermostat
Unit Mounted Controller
WSHP Open with C Microprocessor Control
LEGEND
Cu
— Copper
CuNi — Cupronickel
OA
— Outdoor Air
4
Option
Standard Cleanable
Mesh Filter
Std (No OA Damper)
OA Damper
1
A
Operating Range/Sound Option
A – Extended Range
Packaging
1 – Domestic
A
Voltage
0 – 115-1-60
3 – 208/230-1-60
4 – 265-1-60
B – 115-1-60 with Disconnect
C – 208/230-1-60 with Disconnect
D – 265-1-60 with Disconnect
Refrigerant Circuit Options
E – Cu, Coated Evap
J – CuNi, Coated Evap
AHRI/ISO capacity ratings
50PEC
UNIT SIZE
FLUID
FLOW
RATE
gpm
09
12
15
18
COP
db
EER
wb
—
—
—
—
2.0
2.5
4.0
5.0
WATER LOOP HEAT PUMP
Cooling 86 F
Capacity
Btuh
8,200
10,500
14,400
16,400
EER
12.9
12.0
13.3
12.3
GROUND WATER HEAT PUMP
Heating 68 F
Capacity
Btuh
9,400
12,400
15,000
17,500
COP
4.6
4.3
4.3
4.2
Cooling 59 F
Capacity
Btuh
10,200
13,000
16,400
18,300
LEGEND
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Wet Bulb Temperature
EER
22.3
19.4
19.8
17.6
Heating 50 F
Capacity
Btuh
7,400
10,900
11,800
14,600
COP
3.8
3.8
3.6
3.4
GROUND LOOP HEAT PUMP
Cooling 77 F
Capacity
Btuh
9,000
11,500
14,700
17,000
EER
16.0
14.2
14.5
14.0
Heating 32 F
Capacity
Btuh
5,400
8,400
9,800
12,000
COP
3.3
3.3
3.3
3.1
NOTES:
1. Ratings are in accordance with and certified to AHRI/ISO Standard 13256-1.
2. Cooling capacities based upon 80.6 F db, 66.2 F wb entering air
temperature.
3. Heating capacities based upon 68 F db, 59 F wb entering air temperature.
Physical data
BASE UNIT 50PEC
COMPRESSOR (1 each)
Maximum Water Working Pressure (psig/kPa)
09
Rotary
12
Rotary
15
Rotary
18
Rotary
400/3100
400/3100
400/3100
400/3100
PSC/2
PSC/2
PSC/2
PSC/2
1/10
1/10
1/4
PSC Fan Motor and Blower
Fan Motor Type/Speeds
Fan Motor (hp)
Blower Wheel Size (Dia x W) (in.) (qty)
5.5 x 8.0 (X 2)
WATER CONNECTION SIZE (in.)
0.15
Coaxial Coil Volume (gal.)
Condensate Connection in. FPT
5.5 x 8.0 (X 2)
5.5 x 8.0 (X 2)
5/8 in. Sweat (Optional 1/2 in. FPT)
3/
4 ID
(1 OD)
0.15
3/
4 ID
(1 OD)
1/4
5.5 x 8.0 (X 2)
0.31
3/
4 ID
(1 OD)
0.31
3/
4 ID
(1 OD)
VERTICAL CABINET
Refrigeration Charge (oz)
Air Coil Dimensions (H x L) (in.)
19
22
23
23
10 x 27
10 x 27
10 x 27
10 x 27
7 x 311/4 x 3/8
7 x 311/4 x 3/8
7 x 311/4 x 3/8
7 x 311/4 x 3/8
Weight - Operating (lb)
131
138
144
144
Weight - Shipping (lb)
151
158
164
164
Std. Filter - Washable Aluminum (H x L x W) (in.)
LEGEND
FPT — Female Pipe Thread
PSC — Permanent Split Capacitor
5
Options and accessories
ITEM
Unit Mounted Controller
Cupronickel Heat Exchangers
Thermostat Options
Piping Connections
Deluxe D Microprocessor
Control Board
WSHP Open Multi-Protocol
Controller
WSHP Open Equipment
Touch™ Device
WSHP Open System Touch™
Device
WSHP Open ZS Sensor
Supply and Return Water
Hose Kits
Edge Pro® 7-Day
Programmable Thermostat
FACTORYINSTALLED
OPTION
X
X
X
X
FIELDINSTALLED
ACCESSORY
UNIT MOUNTED CONTROL
X
X
X
X
X
X
X
Factory-installed options
Unit mounted controller is a factory-wired option. The
standard unit mounted controller provides a tactile touchpad for temperature, fan and mode adjustment as shown.
Temperature is read in a digital display, with an LED display indicating unit operating mode, as well as fan speed
and fault indication for high or low pressure lockout. Temperature set points are adjustable from 60 F to 80 F, with
an adjustable temperature differential between 1° F and
6° F. Selectable options include manual or automatic
changeover, high or low fan speed as well as constant fan
operation or fan operation to cycle with the compressor.
Additional features include a 5-minute anti short cycling
delay, random start, 90-second low pressure bypass timer
and intelligent reset to allow the unit to automatically
restart after 5 minutes if a fault is no longer active.
Cupronickel heat exchangers are available for higher
corrosion protection for applications such as open tower,
geothermal, etc. Consult the water quality guidelines for
proper application and selection of this option.
Thermostat options include auto changeover (ACO)
thermostat. The thermostat sends the appropriate signal to
the controller for cooling or heating mode of operation.
Options R and L allow connection to a remote wallmounted thermostat. The controller requires a heat pump
thermostat. The controller can be configured for heat
pump or heat/cool thermostat.
Piping connections can be provided on either the right
or left hand side of the unit, for easy installation. Orientation is determined by facing the unit from the front side.
Deluxe D microprocessor control board provides all
of the options on the standard Complete C control board
in addition to the following:
• Phase Monitor - Prevent motors from running at temperatures above approved ratings, and provides protection against phase loss, phase reversal, and phase
unbalance.
• Energy Management Switch - Enables a 24 vac external
signal to control the operation of the WSHP.
• Pump-Valve Relay - provides a signal between an isolation valve and a secondary pump.
COMPLETE C AND DELUXE D BOARD CAPABILITIES
CAPABILITY
6
COMPLETE C BOARD
DELUXE D BOARD
High and Low Refrigerant Pressure Switches
X
X
Fluid Temperature (Freeze) Protection
X
X
Condensate Overflow Protection Sensor
X
X
Air Temperature (Freeze) Protection
X
X
Anti-short Cycle Timer
X
X
Random Start Relay
X
X
Low Pressure Bypass Timer
X
X
Surge Protection
X
X
Intelligent Reset
X
X
Lockout Reset
X
X
Malfunction (Alarm) Output
X
X
Test Service Mode with LED Fault Indication
X
X
WSHP Open Compatibility
X
X
Energy Management Switch
X
Pump-Valve Relay
X
WSHP Open multi-protocol controller is an integrated component of a Carrier water source heat pump. The
WSHP Open controller continuously monitors and regulates water source heat pump operation with reliability and
precision. This advanced controller features a sophisticated, factory-engineered control program that provides optimum performance and energy efficiency.
The WSHP Open controller is factory installed and programmed to control all factory-installed standard options.
The WSHP Open controller is programmed to communicate with different protocols including BACnet, N2, Modus and LonWorks. While the controller is programmed to
operate on Carrier's i-Vu® building automation system
(BAS), the WSHP Open controller can easily be integrated
into a third party BAS.
Independent fan speed control provides the most efficient
WSHP operation. All WSHP Open controllers come programmed from the factory with independent fan speed
control. Using the space temperature input, the WSHP
Open controller will automatically operate the fan at the
lowest of the available fan speeds to maintain space temperature while providing increased latent heat removal, reduced sound and the lowest fan energy consumption.
Intuitive fault detection allows prolonged operation of the
WSHP. The pre-programmed WSHP Open controller logic
monitors and pre-emptively shuts down a WSHP as an
alarming condition approaches instead of causing a hard
lock out of the WSHP. This way, the WSHP can automatically restart if the fault condition clears within a set amount
of time and a local reset of the WSHP is not required.
Learning Adaptive Optimal Start transitions the WSHP
from unoccupied set points to occupied set points in the
most efficient means possible. Over time, the WSHP will
learn and determine the best adjustment rates of the set
points to provide the most efficient means of shifting the
WSHP to an occupied mode.
Field-installed accessories
WSHP Open Equipment Touch™ and System
Touch™ touchscreen devices have a color LCD display
that allows easy connection to the controllers to view or
change the controller's property values including set points,
schedule equipment, view trends and alarms and more.
The Equipment Touch device provides easy connection to
one controller while the System Touch device can access
up to 60 controllers when wired together as a network.
For more details about the Equipment Touch and System
Touch devices, see either the Equipment Touch or System
Touch Installation and Setup Guide.
WSHP Open - ZS sensors are the preferred method of
monitoring space temperature, humidity and CO2 levels
when using the WSHP Open controller.
NOTE: The ZS sensor is required for space temperature
with all WSHP Open controllers. Only a ZS sensor can
provide the necessary space temperature input for the
WSHP Open controller.
Supply and return water hose kits are available as
accessories. Hose kits are recommended for connection
between the unit and the water loop piping. Hose kits are
24 inches in length, flexible stainless steel and have
options for manual isolation valves with and without auto
flow regulators and Y-strainers.
Edge® Pro 7-day programmable thermostat is available for connecting a unit directly to a wall mounted thermostat. The Edge Pro thermostat offers 2-stage heat,
2-stage cool, remote sensor capability, pre-occupancy
purge, soft start, manual/auto changeover, 4 settings per
day, 24 vac, backlit LCD, keypad lockout, no batteries
required, 5-minute compressor protection, never lost
memory, 3 security levels, and temperature display in
degrees F or C.
EDGE PRO® THERMOSTAT
7
Options and accessories (cont)

ZS SENSOR FEATURES
F
F
i
i
FEATURES
ZS STANDARD
ZS PLUS
ZS PRO
Temp, CO2, Humidity
Neutral Color
X
X
X
X
ZS PRO-F
X
X
X
X
Addressable/Supports Daisy-Chaining
X
X
X
X
Hidden Communication Port
X
X
X
X
Mounts on a Standard 2-in. X 4-in. Electrical Box
X
X
X
X
Occupancy Status Indicator
X
X
X
Push-Button Occupancy Override
X
X
X
Set Point Adjust
X
X
X
Large, Easy-to-Read LCD
X
X
Alarm Indicator
X
X
Fan Speed Control
X
Cooling/Heating/Fan Only - Mode Control
X
F to C Conversion Button
X
ZS SENSOR OPTIONS
ZS STANDARD
OPTIONS
Temperature Only
Temperature with CO2
Temperature with Humidity
Temperature with Humidity and CO2
8
ZS-CAR
ZS-C-CAR
ZS PLUS
ZS PRO
PART NUMBER
ZSPL-CAR
ZSP-CAR
ZSPL-C-CAR
ZSP-C-CAR
ZS PRO-F
ZSPF-CAR
ZSPF-C-CAR
ZS-H-CAR
ZSPL-H-CAR
ZSP-H-CAR
ZSPF-H-CAR
ZS-HC-CAR
ZSPL-HC-CAR
ZSP-HC-CAR
ZSPF-HC-CAR
415
Dimensions
50PEC09-18 UNIT CONSOLE (48 in. Cabinet Option)
2.875
LEFT HAND WATER
CONNECTIONS
RIGHT HAND WATER
CONNECTIONS
6.00
45.00
45.00
6.00
6.125
23.875
12.875
30.75
3.375
48.00
15.875
48.00
30.75
11.00
12.00
NOTES:
1. All dimensions within ± 0.125 inches.
2. Specifications subject to change without notice.
50PEC09-18 UNIT CONSOLE (63 in. Cabinet Option)
Left Hand
Water Connections
Right Hand
Water Connections
NOTES:
1. All dimensions are in inches. All dimensions are within ± 0.125 inch.
2. Specifications subject to change without notice.
3. Fresh air opening in subbase rear.
4. When installing units in cold climates, an outside air damper must be provided to prevent possible condenser freeze-up.
9
Dimensions (cont)
50PEC09-18 UNIT CHASSIS (48 in. Cabinet Option)
LEFT HAND WATER
42.75
11.00
8.00
1.38
12.00
0.75
Water
Out
1.00
2.75
2.00
Water
In
19.56
Condensate
Water
15.63
13.75
13.50
5.00
1.75
3.38
1.63
RIGHT HAND WATER
Disconnect
Switch
0.75
42.75
11.00
4.88
8.00
2.75
Disconnect
Switch
0.75
2.00
Water In
15.63
1.00
Water Out
15.00
13.75
8.69
Condensate
Water
4.00
7.31
NOTES:
1. All dimensions are within ± 0.125 inch.
2. Console units must be installed with a cabinet and subbase.
3. Unit controller shown, other control options may have a different control panel configuration.
4. Specifications subject to change without notice.
10
50PEC09-18 UNIT CHASSIS (63 in. Cabinet Option)
Water Out
2.00
1.00
Water In
12.00
Left Hand
Water Connections
Condensate
Water
13.75
13.50
5
1.75
1.63
2.00
Water In
1.00
Water Out
15.00
Right Hand
Water Connections
13.75
8.69
4.00
Condensate
Water
7.31
NOTES:
1. All dimensions are in inches. All dimensions are within ± 0.125 inch.
2. Specifications subject to change without notice.
3. Fresh air opening in subbase rear.
4. When installing units in cold climates, an outside air damper must be provided to prevent possible condenser freeze-up.
WIDTH DEPTH HEIGHT
63.00
12.00
23.88
CONTROL DISC.
DOOR
GRILLE
WIDTH
WIDTH
6.00
45.00
GRILLE
EDGE CLEARANCE SUBTO
TO UNIT
BASE
DOOR
BOTTOM
DEPTH
LEFT
HAND
6.12
3.37
11.00
GRILLE
CABINET
EDGE
END TO
RETURN
TO
RETURN AIR
WIDTH
DOOR,
AIR LEFT
RIGHT
HAND
HAND
30.87
30.75
2.87
CABINET
END TO
RETURN
AIR,
RIGHT
HAND
12.87
CONDENSER
CONDENSER RECOMMENEDED
REPLACEMENT
HEIGHT FROM
WATER
SUBBASE,
CONNECTIONS NOMINAL FILTER
SIZE
LEFT HAND
FPT
5.00
5/8
30.12 x 7 x 0.37
11
Performance data
50PEC09 — COOLING, NOMINAL AIRFLOW 350 CFM, 2.0 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY
(MBtuh)
50
60
70
85
100
50
60
70
85
100
50
60
70
85
100
50
60
70
85
100
70 db
61 wb
75 db
63 wb
80 db
67 wb
85 db
71 wb
9.35
8.72
8.10
7.16
6.22
10.01
9.34
8.67
7.66
6.65
10.97
10.24
9.50
8.40
7.29
11.94
11.14
10.34
9.14
7.93
SENSIBLE
CAPACITY
(MBtuh)
SENSIBLE TO
TOTAL RATIO
6.22
5.86
5.50
4.99
4.49
7.42
6.98
6.56
5.95
5.34
8.17
7.69
7.22
6.55
5.89
8.94
8.41
7.90
7.17
6.44
0.67
0.67
0.68
0.70
0.72
0.74
0.75
0.76
0.78
0.80
0.74
0.75
0.76
0.78
0.81
0.75
0.75
0.76
0.78
0.81
POWER INPUT
(kW)
HEAT OF
REJECTION
(MBtuh)
EER
0.38
10.66
24.4
0.45
10.25
19.5
0.51
0.60
0.70
0.39
0.45
0.51
0.61
0.70
0.39
0.45
0.52
0.61
0.71
0.39
0.46
0.52
0.62
0.72
9.84
9.22
8.60
11.33
10.87
10.42
9.74
9.05
12.30
11.78
11.27
10.49
9.71
13.27
12.69
12.11
11.25
10.38
15.9
11.8
8.9
26.0
20.8
16.9
12.6
9.5
28.2
22.6
18.4
13.7
10.3
30.5
24.4
19.8
14.8
11.1
50PEC09 — HEATING, NOMINAL AIRFLOW 350 CFM, 2.0 GPM
ENTERING AIR
TEMP (F)
60
70
80
EWT (F)
TOTAL CAPACITY (MBtuh)
50
60
70
80
50
60
70
80
50
60
70
80
7.74
8.90
10.06
11.22
7.31
8.41
9.50
10.60
6.81
7.83
8.85
9.87
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.53
5.92
4.3
0.57
6.96
4.6
0.60
0.64
0.54
0.58
0.61
0.65
0.56
0.59
0.63
0.67
8.00
9.04
5.46
6.43
7.41
8.38
4.91
5.81
6.71
7.60
4.9
5.2
3.9
4.3
4.5
4.8
3.6
3.9
4.1
4.3
50PEC09 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 350 CFM, 2.0 GPM
ENTERING AIR
TEMP (F)
60
70
80
COP
db
EER
EWT
MBtuh
wb
—
—
—
—
—
—
TOTAL CAPACITY (MBtuh)
25
30
40
25
30
40
25
30
40
4.74
5.31
6.45
4.48
5.01
6.09
4.17
4.67
5.67
LEGEND
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Entering Water Temperature
Btuh in Thousands
Wet Bulb Temperature
* Antifreeze required.
12
EWT (F)
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.44
3.22
3.1
0.46
3.73
3.4
0.50
0.45
0.47
0.51
0.46
0.48
0.52
4.75
2.93
3.41
4.36
2.59
3.02
3.90
3.8
2.9
3.1
3.5
2.6
2.8
3.2
50PEC12 — COOLING, NOMINAL AIRFLOW 450 CFM, 2.5 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY
(MBtuh)
50
11.90
11.12
10.33
9.16
7.98
12.74
11.90
11.06
9.80
8.54
13.97
13.05
12.13
10.75
9.37
15.19
14.19
13.19
11.69
10.19
60
70
70 db
61 wb
85
100
50
60
70
75 db
63 wb
85
100
50
60
70
80 db
67 wb
85
100
50
60
70
85 db
71 wb
85
100
SENSIBLE
CAPACITY
(MBtuh)
SENSIBLE TO
TOTAL RATIO
7.92
7.46
7.02
6.39
5.76
9.44
8.89
8.37
7.61
6.86
10.40
9.80
9.22
8.39
7.56
11.37
10.71
10.08
9.17
8.27
0.67
0.67
0.68
0.70
0.72
0.74
0.75
0.76
0.78
0.80
0.74
0.75
0.76
0.78
0.81
0.75
0.75
0.76
0.78
0.81
POWER INPUT
(kW)
HEAT OF
REJECTION
(MBtuh)
EER
0.58
13.88
20.5
0.65
13.35
17.0
0.73
0.84
0.95
0.58
0.66
0.73
0.84
0.96
0.59
0.66
0.74
0.85
0.96
0.59
0.67
0.74
0.86
0.97
12.82
12.02
11.23
14.73
14.15
13.56
12.69
11.81
15.98
15.31
14.65
13.65
12.66
17.22
16.48
15.73
14.62
13.51
14.2
10.9
8.4
21.8
18.1
15.1
11.6
8.9
23.7
19.7
16.4
12.6
9.7
25.6
21.2
17.7
13.6
10.5
50PEC12 — HEATING, NOMINAL AIRFLOW 450 CFM, 2.5 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY (MBtuh)
50
11.05
12.21
13.37
14.53
10.44
11.53
12.63
13.73
9.72
10.74
11.76
12.79
60
70
60
80
50
60
70
70
80
50
60
70
80
80
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.78
8.38
4.1
0.81
9.43
4.4
0.84
0.87
0.80
0.83
0.86
0.89
0.82
0.85
0.88
0.91
10.49
11.54
7.72
8.71
9.70
10.68
6.94
7.85
8.76
9.67
4.6
4.9
3.8
4.1
4.3
4.5
3.5
3.7
3.9
4.1
50PEC12 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 450 CFM, 2.5 GPM
ENTERING AIR
TEMP (F)
60
EWT (F)
TOTAL CAPACITY (MBtuh)
25
7.98
8.55
9.69
7.54
8.08
9.16
7.02
7.52
8.53
30
40
25
70
30
40
25
80
COP
db
EER
EWT
MBtuh
wb
—
—
—
—
—
—
30
40
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.70
5.58
3.3
0.72
6.10
3.5
0.75
0.72
0.73
0.77
0.73
0.75
0.78
7.13
5.09
5.58
6.54
4.52
4.96
5.85
3.8
3.1
3.2
3.5
2.8
2.9
3.2
LEGEND
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Entering Water Temperature
Btuh in Thousands
Wet Bulb Temperature
* Antifreeze required.
13
Performance data (cont)
50PEC15 — COOLING, NOMINAL AIRFLOW 550 CFM, 4.0 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY
(MBtuh)
50
14.79
14.08
13.37
12.31
11.24
15.83
15.07
14.31
13.17
12.03
17.35
16.52
15.69
14.44
13.19
18.88
17.97
17.07
15.71
14.35
60
70
70 db
61 wb
85
100
50
60
70
75 db
63 wb
85
100
50
60
70
80 db
67 wb
85
100
50
60
70
85 db
71 wb
85
100
SENSIBLE
CAPACITY
(MBtuh)
9.84
9.45
9.09
8.58
8.11
11.73
11.26
10.82
10.22
9.66
12.92
12.41
11.93
11.27
10.65
14.13
13.57
13.04
12.32
11.65
SENSIBLE TO
TOTAL RATIO
0.67
0.67
0.68
0.70
0.72
0.74
0.75
0.76
0.78
0.80
0.74
0.75
0.76
0.78
0.81
0.75
0.75
0.76
0.78
0.81
POWER INPUT
(kW)
HEAT OF
REJECTION
(MBtuh)
EER
0.72
17.26
20.5
0.81
16.86
17.3
0.90
1.04
1.18
0.73
0.82
0.91
1.05
1.18
0.73
0.83
0.92
1.06
1.19
0.74
0.83
0.92
1.06
1.20
16.46
15.86
15.26
18.30
17.86
17.42
16.74
16.07
19.86
19.34
18.82
18.04
17.27
21.40
20.81
20.22
19.34
18.46
14.8
11.8
9.6
21.8
18.4
15.7
12.6
10.2
23.7
20.0
17.1
13.7
11.1
25.5
21.6
18.5
14.8
11.9
50PEC15 — HEATING, NOMINAL AIRFLOW 550 CFM, 4.0 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY (MBtuh)
50
12.75
14.26
15.77
17.28
12.05
13.48
14.90
16.33
11.22
12.55
13.88
15.21
60
70
60
80
50
60
70
70
80
50
60
70
80
80
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.92
9.61
4.1
0.96
10.98
4.3
1.00
1.04
0.94
0.98
1.02
1.06
0.96
1.00
1.04
1.09
12.36
13.73
8.84
10.13
11.42
12.71
7.94
9.13
10.31
11.50
4.6
4.9
3.8
4.0
4.3
4.5
3.4
3.7
3.9
4.1
50PEC15 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 550 CFM, 4.0 GPM
ENTERING AIR
TEMP (F)
60
EWT (F)
TOTAL CAPACITY (MBtuh)
25
8.80
9.54
11.02
8.32
9.02
10.41
7.75
8.40
9.70
30
40
25
70
30
40
25
80
COP
db
EER
EWT
MBtuh
wb
—
—
—
—
—
—
30
40
LEGEND
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Entering Water Temperature
Btuh in Thousands
Wet Bulb Temperature
* Antifreeze required.
14
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
0.82
6.00
3.1
0.84
6.67
3.3
0.88
0.84
0.86
0.90
0.86
0.88
0.92
8.01
5.46
6.09
7.35
4.82
5.40
6.56
3.7
2.9
3.1
3.4
2.6
2.8
3.1
50PEC18 — COOLING, NOMINAL AIRFLOW 600 CFM, 5.0 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY
(MBtuh)
SENSIBLE
CAPACITY
(MBtuh)
16.26
15.65
15.05
14.14
13.23
17.40
16.76
16.11
15.13
14.16
19.08
18.37
17.66
16.59
15.52
20.76
19.98
19.21
18.04
16.88
10.82
10.51
10.23
9.86
9.54
12.89
12.52
12.18
11.74
11.37
14.21
13.79
13.42
12.94
12.53
15.54
15.08
14.68
14.15
13.70
50
60
70
70 db
61 wb
85
100
50
60
70
75 db
63 wb
85
100
50
60
70
80 db
67 wb
85
100
50
60
70
85 db
71 wb
85
100
SENSIBLE TO
TOTAL RATIO
0.67
0.67
0.68
0.70
0.72
0.74
0.75
0.76
0.78
0.80
0.74
0.75
0.76
0.78
0.81
0.75
0.75
0.76
0.78
0.81
POWER INPUT
(kW)
HEAT OF
REJECTION
(MBtuh)
EER
0.91
19.36
17.9
1.01
19.11
15.5
1.12
1.27
1.43
0.91
1.02
1.12
1.28
1.44
0.92
1.03
1.13
1.29
1.45
0.93
1.03
1.14
1.30
1.46
18.87
18.47
18.09
20.52
20.23
19.94
19.50
19.06
22.22
21.87
21.52
20.99
20.46
23.93
23.51
23.10
22.48
21.86
13.5
11.1
9.3
19.1
16.5
14.4
11.8
9.9
20.7
17.9
15.6
12.9
10.7
22.3
19.3
16.8
13.9
11.6
50PEC18 — HEATING, NOMINAL AIRFLOW 600 CFM, 5.0 GPM
ENTERING AIR
TEMP (F)
EWT (F)
TOTAL CAPACITY (MBtuh)
50
15.37
16.96
18.56
20.16
14.52
16.03
17.54
19.04
13.52
14.93
16.33
17.74
60
70
60
80
50
60
70
70
80
50
60
70
80
80
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
1.16
11.39
3.9
1.19
12.89
4.2
1.22
1.25
1.19
1.22
1.25
1.28
1.21
1.25
1.28
1.31
14.38
15.88
10.47
11.87
13.28
14.68
9.37
10.67
11.97
13.27
4.4
4.7
3.6
3.9
4.1
4.4
3.3
3.5
3.7
4.0
50PEC18 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 600 CFM, 5.0 GPM
ENTERING AIR
TEMP (F)
60
EWT (F)
TOTAL CAPACITY (MBtuh)
25
11.15
11.93
13.50
10.54
11.27
12.75
9.81
10.50
11.88
30
40
25
70
30
40
25
80
COP
db
EER
EWT
MBtuh
wb
—
—
—
—
—
—
30
40
POWER INPUT (kW)
HEAT OF ABSORPTION
(MBtuh)
COP
1.09
7.43
3.0
1.11
8.16
3.2
1.13
1.11
1.13
1.16
1.14
1.15
1.18
9.63
6.74
7.43
8.81
5.93
6.57
7.84
3.5
2.8
2.9
3.2
2.5
2.7
2.9
LEGEND
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Entering Water Temperature
Btuh in Thousands
Wet Bulb Temperature
* Antifreeze required.
15
Performance data (cont)
SOUND DATA — SOUND POWER LEVEL, CASING RADIATED
OCTAVE BAND SOUND POWER LEVELS db, RE 10-12 WATTS
50PEC
UNIT
125
250
500
1000
2000
4000
8000
09
64.5
59.0
47.0
43.0
34.0
30.0
27.5
AHRI Sound
Rating
Bels
5.643
12
65.0
57.5
52.0
44.0
37.0
32.5
27.5
6.008
15
61.5
60.5
53.5
49.5
42.5
39.5
35.0
6.069
18
69.5
62.0
54.5
51.0
45.0
39.5
34.0
6.363
Electrical data
50PEC
UNIT SIZE
09
12
15
18
FLA
HACR
LRA
RLA
16
—
—
—
—
VOLTAGE
v-ph-Hz
115-1-60
208/230-1-60
265-1-60
115-1-60
208/230-1-60
265-1-60
115-1-60
208/230-1-60
265-1-60
208/230-1-60
265-1-60
QTY
1
1
1
1
1
1
1
1
1
1
1
COMPRESSOR
RLA
7.0
3.4
2.9
9.6
4.6
3.8
12.7
5.6
4.6
7.4
6.0
LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Locked Rotor Amps
Rated Load Amps
LRA
45.6
22.2
18.8
58.4
27.9
22.2
63.0
29.0
20.0
33.0
28.0
QTY
1
1
1
1
1
1
1
1
1
1
1
BLOWER
FLA
2.1
0.7
1.0
2.1
0.7
1.0
1.3
0.8
0.8
0.8
0.8
HP
0.10
0.10
0.10
0.10
0.10
0.10
0.25
0.25
0.25
0.25
0.25
MIN CIRCUIT MAX FUSE/
AMPS
HACR
10.9
5.0
4.6
14.1
6.5
5.8
17.2
7.8
6.6
10.1
8.3
15
15
15
20
15
15
25
15
15
15
15
Application data
Aquazone™ water source heat pump products are available
in a flexible, efficient array of models, which can be used in
all types of water loop, ground water, and ground loop
type systems. Use Aquazone products to provide optimal
energy efficient solutions and adapt to the most challenging design requirements.
AQUAZONE PRODUCT GUIDE
50 SERIES
50HQP,VQP
TYPE
SIZE (tons)
Large Capacity
6-20 (HQP)
6-30 (VQP)
50PC
Compact
1/ -6
2
50PS
Premium
Efficiency
1/ -6
2
High Efficiency
Console
3/ -11/
4
2
Premium
Efficiency
2-6
50PEC
50PT
50PSW
Water-to-Water
2-35
APPLICATION
Environmentally balanced unit with Puron®
refrigerant (R-410A) designed to handle
large zoned areas for all geothermal and
boiler/tower applications.
Compact WSHP with Puron refrigerant
(R-410A) for boiler/tower, ground water, or
ground loop systems.
Premium, ultra efficient unit with Puron
refrigerant (R-410A) for new boiler/tower,
ground water, or ground loop systems.
Efficient console unit with Puron refrigerant
(R-410A) and attractive design for finished
interior, under-window installations.
Premium, ultra efficient 2-stage unit with
Puron refrigerant (R-410A) for new boiler/
tower, ground water, or ground loop
systems.
Efficient unit with Puron refrigerant
(R-410A) serves as an alternative to preheat or cool air. Unit can be used as a
stand-alone or supplemental boiler/chiller
in most hydronic heating applications. Also
conditions process fluids, lubricants, and
refrigerants.
Water loop system
Water loop (or boiler/tower) system applications typically
include a number of units plumbed to a common piping
system. For optimal performance, design this system between 2.25 and 3 gpm per ton of cooling capacity. The
system is comprised of highly efficient, packaged, reverse
cycle heat pump units, interconnected by a water loop.
The water circuit serves as both a sink and source for heat
absorption and rejection and is designed for entering water
temperatures between 60 F and 90 F. Within this temperature range, units can heat or cool from the same water
source. Transferring heat from warm to cold spaces in the
building, whenever they coexist, conserves energy rather
than creating new heat.
Refer to the Carrier Water Source Heat Pump System Design Guide for assistance designing water loop
systems. The guide includes a practical approach for the
latest and most current design recommendations including:
• Horizontal, vertical, console, rooftop and water-towater product applications.
• Ventilation methods and system design, including
energy recovery.
• Acoustical considerations for different product types.
• Addressing IAQ issues such as condensate removal,
humidity control.
• Air distribution design, including diffuser selection/
layout and ductwork design.
• Hydronic system design, including pipe sizing/layout
and boiler/tower sizing.
• Control configurations such as stand alone, DDC, DCV
(demand controlled ventilation), and VVT® (variable volume and temperature).
• WSHP efficiency/operational cost comparison chart.
• System variations such as a system without a boiler,
variable pumping, and VAV for interior use.
Ground water systems
To use Aquazone units in ground water applications,
the extended range should be specified. This will provide
factory-installed coaxial coil insulation to prevent condensate from dripping when entering water temperatures are
below 50 F. In addition, the copper coaxial coil installed on
the Aquazone units may not be suitable for all water conditions. Refer to the Water Conditioning section for proper
coaxial coil material selection.
Surface water system — This system is typically located
near a lake or pond. In this application, the loop can be
submerged in a series of coils beneath the water surface.
The number of coils required depends on system load and
design. This application requires minimum piping and
excavation.
Open loop system — Use this system where ground
water is plentiful. In this application, ground water is
pumped through supply piping from the well to the building. The water is then pumped back into the ground
through a discharge well as it leaves the building. An additional heat exchanger is usually installed between the building water piping system and the ground water piping system. This design limits piping and excavation.
Aquazone units are rated to extremely low temperatures
to self-adjust the refrigeration circuit. Open loop systems
may require water regulating valves.
Ground loop systems
There are many commonly specified designs for ground
loop applications. Typical designs include vertical loops
and horizontal loops. In some applications, water is piped
from the ground or lake directly to the water source heat
pump. This system only requires piping to get the water
from the source to the unit.
NOTE: When using Aquazone water source heat pumps in
ground loop systems, refer to the design considerations in
the ground water system section.
Horizontal ground loop — Use this system when adequate space is available and trenching can be easily accomplished. A series of parallel pipes are laid out in trenches 3
to 6 feet below the ground surface, and then back-filled.
Often, multiple pipes are used to maximize each trench’s
heat transfer capability. Ground conditions, heating and
cooling requirements, and system design determine piping
requirements and ground loop field size.
Vertical ground loop — Use this system in vertical borehole applications. This design is well suited for retrofit
applications when space is limited or where landscaping is
already complete and minimum site disruption is desired.
The vertical ground loop system contains a single loop of
pipe inserted into a hole. The hole is back-filled and
grouted after the pipe is inserted. The completed loop is
concealed below ground. The number of loops required depends on ground conditions, heating and cooling requirements, and the depth of each hole.
Hybrid systems — In some applications, it may be beneficial to incorporate a cooling tower into the ground loop
17
Application data (cont)
system to reduce the overall cost. A hybrid system discards
excess heat into the air and increases the cooling performance of the ground loop.
Condensate drainage
Connect the console unit condensate drain to the building
condensate drain with a flexible, non-pressure rated plastic
hose. Be sure to avoid kinks in this hose to ensure an unobstructed flow of condensate from the unit to the drain.
The condensate hose’s horizontal run is usually too short
to pose any drainage problems; however, make sure this
line is pitched at least 1 in. for every 10 ft of run (in the direction of the flow). Avoid low points and unpitched piping
since dirt collects in these areas and may cause stoppage
and overflow.
Installing a trap or drain in the field is not required unless
specified by local codes. The 50PEC units are designated
in a blow-thru configuration. The condensate drain pan is
located on the outlet side of the blower so that the pressure
in the drain pan is higher than the atmospheric pressure.
Water conditioning
In some applications, maintaining proper water quality
may require higher corrosion protection for the water-torefrigerant heat exchanger. Water quality varies from location to location and is unique for each job. Water characteristics such as pH value, alkalinity, hardness, and specific
conductance are important when considering any WSHP
application. Water typically includes impurities and hardness that must be removed. The required treatment depends on the water quality, as well as the system type. Water problems fall into three main categories:
1. Scale formation caused by hard water reduces the
heat transfer rate and increases the water pressure
drop through the heat exchanger. As water is heated,
minerals and salts are precipitated from a solution
and deposited on the inside surface of the pipe or
tube.
2. Corrosion is caused by absorption of gases from the
air coupled with water on exposed metal. Corrosion
is also common in salt-water areas.
3. Organic growths, such as algae, can reduce the heat
transfer rate by forming an insulating coating on the
inside tube surface. Algae can also promote corrosion
by pitting.
NOTE: In most commercial water loop applications, Aquazone™ WSHP units use a copper, water-to-refrigerant heat
exchanger. Units should also be equipped with a cupronickel heat exchanger for applications where water is outside the copper heat exchanger’s standard contaminant
limits.
18
Acoustical design
Sound power levels represent the sound that the source,
the WSHP unit, produces with no regard to attenuation between the source and the space. Acoustical design goals
are necessary to provide criteria for occupied spaces.
These goals help ensure that people can be comfortable
and communicate effectively over the background noise of
the air-conditioning system and other background noise
sources.
Acoustical design goals are desirable sound pressure levels within a given conditioned space and are represented
by noise criteria (NC) curves. Noise criteria (NC) curve levels represent a peak over a full frequency spectrum. A high
value in a low frequency band has the same effect on NC
level as a lower value in a high frequency band. It is important that sound levels be balanced over the entire spectrum
relative to the NC curve. The lower the NC criteria curve,
the more stringent the room acoustical design must be to
meet the design goals.
It is important to know how to convert the unit ratings
from sound power (Lw) to sound pressure (Lp). This conversion depends on the specifics of the installation’s acoustical environment. Assessing an area’s acoustical design requires that you compare the sound pressure (Lp) with the
NC curve for the selected area.
The resulting calculations are compared to the NC curve
selected for the area to assess the acoustical design.
Some of the factors that affect conversion of sound
power to sound pressure and consequent NC level include:
• Type of acoustical ceiling
• Use of metal or flex duct
• Absorption in the occupied space
• Location in the occupied space
• Open or closed layout plan
• Use of open or ducted returns
• Orientation of unit to occupant
• Use of lined or unlined duct
OCTAVE BAND SOUND PRESSURE LEVEL (Lp)
ASSOCIATED WITH NC CURVES
NOISE
CRITERIA
CURVES
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
OCTAVE BAND SOUND PRESSURE LEVEL (Lp)
Frequency (Hz)
63 125 250 500 1000 2000 4000 8000
49
36
26
17
17
14
12
11
52
41
33
27
22
19
17
16
54
45
38
31
27
24
22
21
58
49
41
36
31
29
28
27
61
53
45
40
36
34
33
32
64
57
50
45
41
39
38
37
67
61
54
49
46
44
43
42
71
64
58
54
51
49
48
47
74
68
63
58
56
54
53
52
77
71
67
63
61
59
58
57
80
75
71
68
66
64
63
62
WATER QUALITY GUIDELINES
CONDITION
HX MATERIAL*
CLOSED
RECIRCULATING†
OPEN LOOP AND RECIRCULATING WELL**
Scaling Potential — Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.
pH/Calcium
All
N/A
pH < 7.5 and Ca Hardness, <100 ppm
Hardness Method
Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)
Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be implemented.
Ryznar Stability Index
6.0 - 7.5
All
N/A
If >7.5 minimize steel pipe use.
Langelier Saturation Index
–0.5 to +0.5
All
N/A
If <–0.5 minimize steel pipe use.
Based upon 150 F HWG and direct well, 85 F indirect well HX.
Iron Fouling
Iron Fe2+ (Ferrous)
<0.2 ppm (Ferrous)
All
N/A
(Bacterial Iron Potential)
If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.
Iron Fouling
<0.5 ppm of Oxygen
All
N/A
Above this level deposition will occur.
Corrosion Prevention††
pH
6 - 8.5
6 - 8.5
All
Monitor/treat as needed.
Minimize steel pipe below 7 and no open tanks with pH <8.
<0.5 ppm
Hydrogen Sulfide (H2S)
At H2S>0.2 ppm, avoid use of copper and cupronickel piping or HXs.
All
N/A
Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.
Ammonia Ion as Hydroxide,
<0.5 ppm
Chloride, Nitrate and Sulfate
All
N/A
Compounds
Maximum Chloride Levels
Maximum allowable at maximum water temperature.
50 F (10 C)
75 F (24 C)
100 F (38 C)
Copper
N/A
<20 ppm
NR
NR
Cupronickel
N/A
<150 ppm
NR
NR
304 SS
N/A
<400 ppm
<250 ppm
<150 ppm
316 SS
N/A
<1000 ppm
<550 ppm
<375 ppm
Titanium
N/A
>1000 ppm
>550 ppm
>375 ppm
Erosion and Clogging
Particulate Size and Erosion
<10 ppm of particles and a
maximum velocity of 6 fps. <10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maximum
All
velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that
Filtered for maximum
is not removed can potentially clog components.
800 micron size.
Brackish
Use cupronickel heat exchanger when concentrations of calcium or
All
N/A
sodium chloride are greater than 125 ppm are present. (Seawater is
approximately 25,000 ppm.)
LEGEND
HWG — Hot Water Generator
HX — Heat Exchanger
N/A — Design Limits Not Applicable Considering Recirculating
Potable Water
NR — Application Not Recommended
SS
— Stainless Steel
*Heat exchanger materials considered are copper, cupronickel, 304 SS
(stainless steel), 316 SS, titanium.
†Closed recirculating system is identified by a closed pressurized piping
system.
**Recirculating open wells should observe the open recirculating design
considerations.
††If the concentration of these corrosives exceeds the maximum allowable
level, then the potential for serious corrosion problems exists.
Sulfides in the water quickly oxidize when exposed to air, requiring that no
agitation occur as the sample is taken. Unless tested immediately at the
site, the sample will require stabilization with a few drops of one Molar
zinc acetate solution, allowing accurate sulfide determination up to
24 hours after sampling. A low pH and high alkalinity can cause system
problems, even when both values are within ranges shown. The term pH
refers to the acidity, basicity, or neutrality of the water supply. Below 7.0,
the water is considered to be acidic. Above 7.0, water is considered to be
basic. Neutral water registers a pH of 7.0.
To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is
equivalent to ppm.
19
Application data (cont)
WSHP sound control
Analyzing the projected sound level in the conditioned
space caused by a WSHP unit is quite involved. The key is
to have good sound power ratings (Lw) in dB on the equipment to determine the ductwork, ceiling and room sound
attenuation effect.
Console units
With console units, the fan and compressor are located
within the space, and only the casing design attenuates the
transmission of sound sources into the space. The designer
should carefully review the manufacturer’s acoustical data
when selecting console units and use lower fan speeds to
minimize space noise.
Operating limits
Environment
This equipment is designed for indoor installation ONLY.
Power supply
A voltage variation of ± 10% of nameplate utilization voltage is acceptable.
AIR LIMITS
AIR LIMITS
COOLING
Minimum ambient air temperature F
Maximum ambient air temperature F
Minimum evaporator entering air db/wb F
Rated air coil entering air db/wb F
Maximum evaporator entering air db/wb F
Minimum water coil entering fluid temperature F
Water loop typical coil entering fluid range temperature F
Maximum water coil entering fluid temperature F
HEATING
Minimum ambient air temperature F
Maximum ambient air temperature F
Minimum evaporator entering air db F
Rated air coil entering air F
Maximum evaporator entering air db F
Normal water coil entering fluid range F
Minimum water coil entering fluid F
EXTENDED
RANGE
OPTION
50
100
68/57
80/67
98/85
50
70/90
110
40
85
50
68
80
25-80*
20*
LEGEND
db — Dry Bulb
wb — Wet Bulb
*Antifreeze solution is required at these fluid temperatures.
Starting conditions
Freeze protection
The 50PEC unit will start and operate in an ambient temperature of 50 F, with entering-air temperature at 50 F
with both air and water at the flow rates used in the AHRI/
ISO Standard 13256-1 rating test, for initial start-up in
winter.
NOTE: These are not normal or continuous operating
conditions. Such a start-up should be used to bring the
building space up to occupancy temperature.
Applications where systems are exposed to outdoor
temperatures below freezing (32 F) must be protected from
freezing. The most common method of protecting water
systems from freezing is adding glycol concentrations into
the water. Use design care when selecting both the type
and concentrations of glycol due to the following:
• Equipment and performance may suffer with high concentrations of glycol and other antifreeze solutions
• Loss of piping pressure may increase greatly, resulting
in higher pumping costs
• Higher mixture viscosity may cause excess corrosion
and wear on the entire system
• The water’s acidity may be greatly increased, promoting
corrosion
Glycol promotes galvanic corrosion in systems of dissimilar
metals. The result is corrosion of one metal by the other,
causing leaks.
20
Controls — WSHP Open sequence of operation
The WSHP Open multi-protocol controller will control mechanical cooling and heating outputs based on its own
space temperature input and set points. An optional CO2
IAQ (indoor air quality) sensor mounted in the space can
maximize the occupant comfort. The WSHP Open controller has its own hardware clock that is automatically set
when the heat pump software is downloaded to the board.
Occupancy types are described in the scheduling section
below. The following sections describe the functionality of
the WSHP Open multi-protocol controller. All point objects that are referred to in this sequence of operation will
be referenced to the objects as viewed in the BACview6
handheld user interface.
Scheduling
Scheduling is used to start/stop the unit based upon a time
period to control the space temperature to specified occupied heating and cooing set points. The controller is defaulted to control by occupied set points all the time, until
either a Time Schedule is configured with the Equipment
Touch™ interface, i-Vu® Open, or a third party control system Enables/Disables the BAS On/Off point. Your local
time and date must be set for these functions to operate
properly. The occupancy source can be changed to one of
the following:
Occupancy schedules — The controller will be occupied 24/7 until a Time schedule has been configured using
either i-Vu Open, Equipment Touch or a third party control
system Enables/Disables the BAS On/Off point. This can
be disabled by going to Config>Unit>Occupancy Schedules and changing the point from Enable to Disable.
NOTE: This point must be Enabled in order for i-Vu Open
or Bacview6 to assign a Time schedule to the controller.
Schedule_Schedule — The unit will operate according
to the schedule configured and stored in the unit. The
schedule is accessible via the Equipment Touch user interface, i-Vu Open, or Field Assistant. The daily schedule consists of a start/stop time (standard or 24 hour mode) and
seven days of the week, starting with Monday and ending
on Sunday.
Occupancy input contact (option) — If configured for
remote occupancy control (default), the WSHP Open controller has the capability to use an external dry contact closure to determine the occupancy status of the unit. You will
need to disable the Occupancy Schedules in order to utilize
the Occupancy Contact Input. The control will cause the
unit to go into an occupied mode whenever the abnormal
input is sensed. After the input returns to its normal state,
the unit will stay in the occupied mode for the configured
Occupancy Override Delay period (15 minutes default).
NOTE: Scheduling can only be controlled from one
source.
BAS (building automation system) on/off — For use
with a Building Automation System that supports network
scheduling, you will need to disable the Occupancy Schedules so the BAS system can control the unit through a network communication and the BAS scheduling function.
NOTE: Scheduling can only be controlled from one
source.
Global occupancy scheduling — The WSHP Open
controller has the capability to read the occupancy status
from another unit so that a group of WSHPs can be controlled from a single occupancy schedule. The local Occupancy Schedules must be disabled in order to utilize the
global occupancy input.
NOTE: Scheduling can only be controlled from one
source.
BACnet network occupancy input — The WSHP Open
controller has the capability to accept an external BACnet
Binary Network Input for occupancy control. This function
is only compatible with units used in BACnet systems. You
will need to configure the “System Occupancy” BACnet
network input point to locate the device and point name
where the external occupancy point information resides.
Also Occupancy Schedules must be disabled in order to utilize this input.
NOTE: Scheduling can only be controlled from one
source.
Fire/smoke detector (FSD) input (field optional)
The WSHP Open controller has the capability to read the
status of a normally closed FSD contact input to determine
if a fire or smoke detector alarm is present. If the controller
determines an alarm condition is present, all heating, cooling and the fan are disabled. The normal state of the switch
is factory set to Normally Closed and cannot be changed.
Shutdown input
The WSHP Open controller has a shutdown input (software) which when set to its Active mode will cause the
WSHP to safely shut down in a controlled fashion. Heating
and cooling will be disabled after any minimum runtime
conditions expire and the fan will be disabled after the fan
off timer expires. All alarms are reset but any active alarm
will remain active. After the shutdown input transitions
from Active mode to Inactive mode, the WSHP Open controller will restart after the configured power fail restart delay expires.
Indoor fan
The indoor fan will operate in any one of three modes depending upon the user configuration selected. Fan mode
can be defined/selected as Auto, Continuous, or Always
On. In Auto mode the fan is in intermittent operation during both occupied and unoccupied periods. Continuous fan
is intermittent during unoccupied periods and continuous
during occupied periods. Always On operates the fan continuously during both occupied and unoccupied periods. In
the default mode, Continuous, the fan will be turned on
whenever any one of the following is true:
• It is in occupied mode. Determined by its occupancy
status.
• Whenever there is a demand for cooling or heating in
the unoccupied mode.
• When there is a call for dehumidification (optional).
When power is reapplied after a power outage, there
will be a configured time delay of 5 to 600 seconds before
starting the fan. There are also configured fan delays for
Fan On and Fan Off. The fan on delay defines the delay
time (0 to 30 seconds; default 10) before the fan begins to
21
Controls — WSHP Open sequence of operation (cont)
operate after heating or cooling is started while the fan off
delay defines the delay time (0 to 180 seconds; default 45)
the fan will continue to operate after heating or cooling is
stopped. The fan will continue to run as long as the compressors, heating stages, or the dehumidification relays are
on. If the SPT failure alarm or condensate overflow alarm
is active; the fan will be shut down immediately regardless
of occupancy state or demand.
Automatic independent fan speed control — The
WSHP Open controller is capable of controlling up to three
fan speeds. The motor will operate at the lowest speed possible to provide quiet and efficient fan operation with the best
latent capability. The motor will increase speed if additional
cooling or heating is required to obtain the desired space temperature set point. The control increases the motor's speed as
the space temperature rises above the cooling or below the
heating set point. The amount of space temperature increase
above or below the set point required to increase the fan
speed is user configurable in the set point. Also, the control
will increase the fan speed as the supply-air temperature approaches the configured minimum or maximum limits.
Fan speed control - during heating —
Whenever
heat is required and active, the control continuously monitors the supply air temperature to verify it does not rise
above the configured Maximum Heating SAT Limit (110 F
default). As the SAT approaches this value, the control will
increase the fan speed as required to ensure the SAT will
remain 5° F below the limit. This feature provides the most
quiet and efficient operation by operating the fan at the
lowest speed possible.
Fan speed control - during cooling — Whenever mechanical cooling is required and active, the control continuously monitors the supply-air temperature to verify it does
not fall below the configured Minimum Cooling SAT Limit
(50 F default). As the SAT approaches this value, the control will increase the fan speed as required to ensure the
SAT will remain 5° F above the limit. Fan will operate at
lowest speed to maximize latent capacity during cooling.
Fan status (option)
An optional input can be configured as either an occupancy input contact or a fan status input. If configured as fan
status, the controller will compare the status of the fan to
the desired commanded state. Whenever the fan is commanded to run (ON), the fan status will be checked and verified to match the commanded state. If the fan status is not
on, then a fan status alarm will be generated after 1 minute
and the equipment's compressor(s) and auxiliary heat will
be disabled and the optional OA damper will close (if
equipped).
Cooling
The WSHP Open controller will operate one or two stages
of compression to maintain the desired cooling set point.
The compressor outputs are controlled by the PI (proportional-integral) cooling loop and cooling stages capacity algorithm. They will be used to calculate the desired number
of stages needed to satisfy the space by comparing the
space temperature (SPT) to the appropriate cooling set
point. The waterside economizer, if applicable, will be used
for first stage cooling in addition to the compressor(s). The
22
following conditions must be true in order for the cooling
algorithm to run:
• Cooling is set to Enable
• The Fire/Smoke Input and Shutdown modes are
inactive
• Heat mode is not active and the compressor time
guard(s) have expired
• Condensate Overflow input is Normal
• Fan Status is true (if option is enabled)
• If occupied, the SPT is greater than the occupied cooling set point
• Space temperature reading is valid
• If unoccupied, the SPT is greater than the unoccupied
cooling set point.
• If economizer cooling is available and active and the
economizer alone is insufficient to provide enough cooling.
• OAT is greater than the cooling lockout temperature if
OAT is available
• Condenser water pump is on (if condenser water linkage active)
If all the above conditions are met, the compressors will
be energized as required, otherwise they will be de-energized. If cooling is active and should the SAT approach the
minimum SAT limit, the fan will be indexed to the next
higher speed. Should this be insufficient and if the SAT falls
further (equal to the minimum SAT limit), the fan will be indexed to the maximum speed. If the SAT still continues to
fall 5° F below the minimum SAT limit, all cooling stages
will be disabled.
During Cooling, the reversing valve output will be held
in the cooling position (either B or O type as configured)
even after the compressor is stopped. The valve will not
switch position until the heating mode is required.
The configuration screens contain the Min SAT parameter as well as cooling lockout based on outdoor air temperature (OAT), both can be adjusted to meet various specifications.
There is a 5-minute off time for the compressor as well
as a 5-minute time delay when staging up to allow the SAT
to achieve a stable temperature before energizing a second
stage of capacity. Likewise, a 45-second delay is used
when staging down.
After a compressor is staged off, it may be restarted
again after a normal time-guard period of 5 minutes and if
the supply air temperature has increased above the minimum supply air temperature limit.
The WSHP Open controller provides a status input to
monitor the compressor operation. The status is monitored to determine if the compressor status matches the
commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped
and caused the compressor to stop operating normally. If
this should occur, an alarm will be generated to indicate the
faulted compressor condition.
Reverse cycle heating
The WSHP Open controller will operate one or two stages
of compression to maintain the desired heating set point.
The compressor outputs are controlled by the heating PI
(proportional-integral) loop and heating stages capacity algorithm. They will be used to calculate the desired number
of stages needed to satisfy the space by comparing the
space temperature (SPT) to the appropriate heating set
point. The following conditions must be true in order for
the heating algorithm to run:
• Heating is set to Enable
• The Fire/Smoke Input and Shutdown modes are inactive
• Cool mode is not active and the compressor time guard
has expired
• Condensate Overflow input is Normal
• Fan Status is true (if option is enabled)
• If occupied, the SPT is less than the occupied heating
set point
• Space temperature reading is valid
• If unoccupied, the SPT is less than the unoccupied heating set point
• OAT is less than the heating lockout temperature if
OAT is available.
• Condenser water pump is on (if condenser water linkage active)
If all the above conditions are met, the heating outputs
will be energized as required, otherwise they will be deenergized. If the heating is active and should the SAT approach the maximum SAT limit, the fan will be indexed to
the next higher speed. Should this be insufficient, then if
the SAT rises further and reaches the maximum heating
SAT limit, the fan will be indexed to the maximum speed. If
the SAT still continues to rise 5° F above the maximum limit, all heating stages will be disabled.
During heating, the reversing valve output will be held in
the heating position (either B or O type as configured) even
after the compressor is stopped. The valve will not switch
position until the cooling mode is required.
The configuration screens contain the Max SAT parameter as well as heating lockout based on outdoor air temperature (OAT), both can be adjusted to meet various specifications.
There is a 5-minute off time for the compressor as well
as a 5-minute time delay when staging up to allow the SAT
to achieve a stable temperature before energizing a second
stage of capacity. Likewise, a 45-second delay is used
when staging down.
After a compressor is staged off, it may be restarted
again after a normal time-guard period of 5 minutes and if
the supply air temperature has fallen below the maximum
supply air temperature limit.
The WSHP Open controller provides a status input to
monitor the compressor operation. The status is monitored
to determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant
safety switch or other safety device has tripped and caused
the compressor to stop operating normally. If this should occur, an alarm will be generated to indicate the faulted compressor condition.
Indoor air quality (IAQ) and demand controlled ventilation (DCV)
If the optional indoor air quality sensor is installed or the
network input point “System Space AQ” is utilized, the
WSHP Open controller can maintain indoor air quality,
with a field-installed modulating OA damper providing demand controlled ventilation. The control operates the modulating OA damper during occupied periods. The control
monitors the CO2 level and compares it to the configured
set points and adjusts the ventilation rate as required. The
control provides proportional ventilation to meet the requirements of ASHRAE specifications by providing a base
ventilation rate and then increasing the rate as the CO2 level increases. The control will begin to proportionally increase ventilation when the CO2 level rises above the start
ventilation set point and will reach the full ventilation rate
when the CO2 level is at or above the maximum set point.
A user configurable minimum damper position ensures
that proper base ventilation is delivered when occupants
are not present. The IAQ configurations can be accessed
through the configuration screen. The following conditions
must be true in order for this algorithm to run:
• Damper control is configured for DCV.
• The Fire/Smoke Input and Shutdown modes are inactive.
• Fan Status is true (if option is enabled).
• The unit is in an occupied mode.
• IAQ sensor reading is greater than the DCV Start Control set point.
The control has four user adjustable set points: DCV
start control set point, DCV Maximum Control set point,
Minimum damper position and the DCV Maximum damper position.
NOTE: In order for the damper to maintain proper base
ventilation, the fan must be configured to operate in either
the Continuous or Always On mode.
Two-position OA damper — The control can be configured to operate as a ventilation damper in a 2-position ventilation mode to provide the minimum ventilation requirements during occupied periods. This control operation still
utilizes the modulating damper actuator.
Demand limit
The WSHP Open controller has the ability to accept three
levels of demand limit from the BACnet network. In response to a demand limit, the unit will decrease its heating
set point and increase its cooling set point to widen the
range in order to immediately lower the electrical demand.
The amount of temperature adjustment in response is user
adjustable for both heating and cooling and for each demand level. The response to a particular demand level may
also be set to zero.
Power failure restart delay
The control provides a user configurable delay when recovering from a power failure or SHUTDOWN mode or when
transitioning from unoccupied to occupied mode in order
to prevent excessive demand when many units start simultaneously. Each unit can be user configured for a unique
23
Controls — WSHP Open sequence of operation (cont)
delay between 5 and 600 seconds. The factory programmed default delay is 180 seconds.
Fire/smoke detector alarm
The control monitors the voltage input to J1-9 to detect if
a smoke detector or fire detector Normally Closed contact
has opened, indicating an alarm condition. The control will
verify the presence of 24 vac on this input. If the input
should open at any time, an alarm will be generated after 3
seconds and the equipment (fan, compressor, auxiliary
heat and damper) will immediately return to an OFF or
closed state.
Space temperature alarms
The control provides the ability to generate an alarm whenever the space temperature exceeds the alarm set point. A
separate occupied hysteresis and fixed unoccupied high and
low alarm set points are provided. The control provides a 5minute alarm delay during unoccupied periods. During occupied periods, the control uses the occupied temperature set
points and applies the hysteresis value to determine the
alarm set points. Whenever an occupancy transition from
unoccupied to occupied occurs or the occupied temperature
set points are changed causing an alarm condition to occur,
the control will automatically calculate an alarm delay (equivalent to the configured delay time in minutes per degree F
times the temperature error that occurred plus 15 minutes).
This will prevent nuisance alarms whenever an occupancy
change occurs and allows time for the unit to correct an
alarming temperature condition.
Condenser water temperature alarm
The control has 4 configurable alarm limits for condenser
water temperature. The control will verify that the water
temperature is within operating range (between high and
low limits) for the specific operating mode (heating or cooling) before energizing the compressor. Once the compressor is started, the condenser water temperature is further
monitored to verify that it is within limits to ensure sufficient
water is flowing through the coil. Should the leaving water
temperature rise above or fall below the appropriate limits,
an alarm is generated and the compressor will be shut down
if the condition occurs for more than 15 seconds.
Supply air temperature alarm
The control has 2 configurable alarm limits for supply air
temperature. The control will verify that the supply air temperature is within operating range (between high and low
limits) whenever the compressor or auxiliary heat is operating. Should the air temperature rise above or fall below the
appropriate limit, an alarm is generated if the condition occurs for more than 1 minute.
High condensate/overflow alarm
The control will monitor a discrete input to determine the
state of a condensate level switch. The input can be configured to alarm on either an open or closed switch condition.
Should this input be in an alarm state, the control will start
a timer and after the timer exceeds a configurable Condensate Overflow Alarm Delay limit (10-second default), the
control will generate an alarm and the unit will disable the
compressor and fan outputs.
24
Fan status alarm (optional)
The control generates a fan status alarm should the fan status input detect the fan is OFF after any fan speed output
has been enabled. A 30-second alarm delay is used to allow the fan sufficient time to start operating before an
alarm condition is detected. The control monitors the fan
output and if the fan is operating at any speed, the fan status must detect the fan is operating.
Compressor status alarm
The control generates a compressor failure alarm should
the compressor status input detect the compressor is OFF
after the compressor output has been energized. A 6-minute alarm delay is used to allow the compressor to start
(prevents alarms due to time guard operation) before an
alarm condition is detected. The control monitors the compressor output and if the compressor output is energized,
the compressor status input must detect the compressor
operation.
Filter status alarm
The control provides the ability to generate a dirty filter
alarm after the number of fan run hours exceeds a configurable filter alarm timer limit. The control monitors the fan
output and if the fan is operating at any speed, it accumulates run time. Should the fan run time hours exceed the
configurable limit, an alarm is generated. To reset the
alarm timer after the alarm has been generated, a Reset
Filter Alarm input is provided. The filter alarm can be disabled by setting the Filter Alarm Timer Delay to zero (factory default).
Indoor air quality alarm
The control provides the ability to generate a high CO2 level alarm during occupied periods whenever the CO2 sensor
value exceeds the user adjustable limit. Whenever an occupancy transition from unoccupied to occupied occurs, or
the occupied alarm limit is changed to a value that causes
an alarm condition to occur, the control will automatically
calculate an alarm delay:
the configured delay time in minutes
ppm times the error that occurred
+ 15 minutes
This prevents nuisance alarms from occurring when occupancy changes or the set point is changed. The IAQ
alarm can be disabled by setting Occupied High IAQ Alarm
Limit to zero.
Relative humidity alarm
The control provides the ability to generate an alarm
whenever the space relative humidity exceeds the alarm set
point. Separate occupied and unoccupied high humidity
alarm set points are provided. The control provides a
5-minute alarm delay during unoccupied periods. During
occupied periods, the controller uses the occupied high RH
alarm limit. Whenever an occupancy transition from unoccupied to occupied occurs, or the occupied high alarm limit
is lowered causing an alarm condition to occur, the control
will automatically calculate an alarm delay:
the configured delay time in minutes
% RH times the humidity error
condition that occurred
+ 15 minutes
This will prevent nuisance alarms whenever an occupancy change occurs and allows time for the unit to correct
an alarming humidity condition.
Condenser water linkage failure alarm (if condenser water linkage was active)
The control generates a condenser water linkage failure
alarm should linkage fail after once being active. The linkage status is monitored and should it fail to be updated
from the loop controller, then a Condenser Water Linkage
alarm is generated. A 6-minute alarm delay is provided to
prevent false alarms from occurring.
NOTE: This alarm can only be reset by re-establishing linkage and correcting the condition that caused the linkage
failure to occur or by setting the SHUTDOWN point to Active momentarily.
Airside linkage failure alarm (if airside linkage
was active)
The control generates an airside linkage failure alarm
should linkage fail after once being active. The linkage
status is monitored and should it fail to be updated from the
Master Zone Controller, then an airside linkage alarm is
generated. A 6-minute alarm delay is provided to prevent
false alarms from occurring.
NOTE: This alarm can only be reset by re-establishing linkage and correcting the condition that caused the linkage
failure to occur or by setting the SHUTDOWN point to Active momentarily.
OAT sensor alarm (if network OA temperature
was active)
The control generates an OAT sensor failure alarm should
the value of OAT fail to be updated through the network after once being active. The update status is monitored and
should it fail to be updated, then an OAT sensor alarm is
generated. An alarm delay (approximately 1 hour) is provided to prevent false alarms from occurring while minimizing the required update rate for OAT.
NOTE: This alarm can be reset by setting the SHUTDOWN point to Active momentarily.
ZS sensor alarm (if ZS sensor was active)
The control generates a ZS sensor failure alarm should the
ZS sensor fail to communicate with the control. The update status is monitored and should it fail to be updated,
then the alarm is generated.
25
Guide specifications
Console Water Source Heat Pumps
HVAC Guide Specifications
Size Range: 6,220 to 20,760 Btuh
Cooling Capacity
6,810 to 20,160 Btuh
Heating Capacity
Carrier Model Number: 50PEC
Part 1 — General
1.01 SYSTEM DESCRIPTION
A. Install water source heat pumps, as indicated on the
plans with capacities and characteristics as listed in
the schedule and the specifications that follow.
B. Units shall be individually packaged with wooden
skid covered with protective corner posts and plastic
stretch wrapping for maximum protection.
1.02 QUALITY ASSURANCE
A. All equipment shall be rated and certified in accordance with ANSI/AHRI/ASHRAE/ISO (American
National Standards Institute/Air-Conditioning, Heating and Refrigeration Institute/American Society of
Heating, Refrigerating, and Air-Conditioning Engineers/International Organization for Standardization) 13256-1, latest edition, and safety listed in
accordance with NRTL (Nationally Recognized Testing Lab) or CSA (Canadian Standards Association).
All units shall have AHRI/ISO and NRTL or CSA
labels.
B. All units shall be factory tested under normal operating conditions at nominal water flow rates. Units
which are tested without water flow are not acceptable.
Part 2 — Product
2.01 EQUIPMENT
A. Heat Pump Assembly:
Units shall be designed to operate throughout the
range of entering fluid temperature of 50 F to 110 F
in the cooling mode and 30 F to 80 F in the heating
mode (extended range allows for 20 F to 80 F in the
heating mode). The units shall be manufactured in an
ISO 9001 certified facility.
B. Unit Cabinet:
1. Cabinet work shall include two separate integral
assemblies: cabinet and subbase. Cabinet shall
be factory fabricated from heavy gage galvanized steel, finished with powder coat paint.
Cabinet dimensions are in accordance with
drawings and are manufactured for left or right
water discharge piping. Cabinet shall be singlepiece construction. Removal of the cabinet shall
give complete side and front access to unit for
routine servicing. The cabinet is mounted onto
the subbase and secured with two screws for
security. A wall mounting bracket secured to
the subbase shall be provided. Air flow is bottom intake-top discharge. Cabinets will be factory fabricated specifically for left hand or right
hand connections as specified. Cabinet shall be
26
slope top style, flat top cabinet is not acceptable.
2. An access door shall be provided to cover the
swing down control section.
3. Factory mounted 33/8 in. subbase is constructed of heavy gage painted steel. Cutouts
are provided for floor connections and outside
air. Includes integral filter mounts to support a
bottom mount permanent, washable, aluminum
mesh filter. Subbase has a bracket that may be
secured to the wall to provide stability.
C. Chassis:
Chassis is of compact design and of the same
dimensions for all model sizes. Dimensions must
match details on drawings. Chassis mounts directly
on support structures provided by the subbase and
shall be removable from the subbase without dismantling the subbase. Both compressors and coil
compartments shall be thermally and acoustically
insulated, and have removable steel cover plates giving double acoustical protection between the two
compartments. Compressor is mounted to the bottom of chassis with a 2-piece basepan to reduce
noise transmission and vibration. The compressor
access panel shall have a closed cell foam insulation
for extra quiet operation. Fiberglass insulation is not
acceptable on compressor access panel. The stainless steel condensate drain pan shall be IAQ with
positive double slope and be removable without disturbing the evaporator assembly for cleaning as
needed.
D. Fan and Motor Assembly:
Unit blower is three-speed high efficiency PSC type.
Motor is direct connected to two double width, double inlet forward curved oversized centrifugal blower
wheels that are selected for quiet operation, and balanced to minimize vibration. Blower wheel access is
through removable blower inlet rings. Motor and
blower assembly shall be removable without removing the chassis.
E. Refrigerant Components:
1. Units shall have a sealed refrigerant circuit including a rotary compressor, a refrigerant metering
device, a finned tube refrigerant-to-air heat
exchanger, a reversing valve, a coaxial (tube-intube) refrigerant-to-water heat exchanger, and
safety controls including a high-pressure sensor, a
loss-of-charge sensor to protect against loss of
refrigerant, and low water temperature (freezestat) sensor.
2. Rotary compressors shall have thermal overload protection and shall be located in an
insulated compartment to minimize sound
transmission. Units shall have the compressor
mounted on isolators to reduce noise and vibration transmission.
3. Coils shall be coated using an electro coating
process for protection against most airbourne
chemicals.
4. Refrigerant-to-water heat exchangers shall be of
copper inner water tube and steel refrigerant
outer tube design rated to withstand 600 psig
working refrigerant pressure.
5. Drain pan shall be constructed of stainless steel
and have powder coated application to inhibit
corrosion.
6. Reversing valve shall be four-way solenoidactivated refrigerant valves which shall fail to
heating operation. If the unit fails to cooling a
low-temperature thermostat must be provided
to prevent over-cooling of the room.
7. Optional coaxial water-to-refrigerant heat
exchangers shall be cupronickel.
8. Standard extended range for units operating
with entering water temperatures below dew
point. For use in operating range with entering
water temperatures from 20 to 110 F.
F. Controls and Safeties:
1. Electrical:
A control box shall be located within the unit
and shall contain controls for compressor,
reversing valve and fan motor operation.
2. Piping:
a. Copper tubes with a 5/8-in. OD dimension
shall be provided on the supply and return
water connections for the purpose of
forming a sweat connection to field-supplied
distribution piping.
b. Optional threaded connections: A 1/2-in.
female pipe threaded fitting shall be factory
mounted on the supply and return water
connections.
3. Unit Controls:
Safety devices on all units shall include lowpressure sensor or loss-of-charge switch, highpressure switch, low water temperature sensor,
and condensate overflow switch.
4. The standard unit mounted controller shall provide a tactile touchpad for temperature, fan and
mode adjustment and provide a digital display
of temperature in either degrees Fahrenheit or
Celsius. The unit mounted controller shall provide an LED display for indication of unit operating mode as well as fan speed and fault
indication for high or low pressure lockout.
Options and features shall include:
a. Adjustable temperature set point from 60 F
through 80 F (15.5 C through 26.7 C).
b. Adjustable temperature differential between
1 F and 6° F (0.6 C and 3.3° C).
c. Manual or automatic changeover.
d. High and low fan speed control.
e. Constant fan speed or fan speed cycling with
compressor.
f. A 5-minute anti-short cycling delay.
g. Random start.
h. A 90-second low pressure bypass timer.
i. Intelligent reset to allow unit to automatically
restart after 5 minutes if a fault is no longer
active.
5. The optional Complete C electronic control
system shall interface with the remote heat
pump (Y,O) wall thermostat (mechanical or
electronic). The control system shall have the
following features:
a. Anti-short cycle time delay on compressor
operation; time delay shall be 5 minutes
minimum.
b. Random start on power-up.
c. Low voltage protection.
d. High voltage protection.
e. Condensate overflow shutdown.
f. Unit shutdown on low refrigerant pressures.
g. Unit shutdown on high or low water temperature (selectable for antifreeze solutions).
h. Option to reset unit at thermostat or disconnect. Fault type shall be retained in memory
if reset at thermostat.
i. Automatic intelligent reset. Unit shall automatically restart 5 minutes after shutdown if
the fault has cleared. Should a fault occur
3 times sequentially, then lockout will occur.
j. Ability to defeat time delays for servicing.
k. Light-emitting diode (LED) to indicate high
pressure, low pressure, improper voltage,
water coil freeze protection, air coil freeze
protection, condensate overflow, and control status.
l. Remote fault type indication at thermostat.
m. Single harness connection for all safety
devices.
n. Selectable 24-v or pilot duty dry contact
alarm output.
o. 24-v output to cycle a motorized water valve
with compressor contactor.
p. The control box components shall be
easily accessible with a swing out control
compartment.
6. The optional Deluxe D electronic control shall
have all the features of the Complete C control,
with the following additional features:
a. Pump-valve relay.
b. Energy Management Switch to enable
remote operation of WSHP.
c. Phase Monitor
7. WSHP Open Multiple Protocol Control:
a. Units shall have all the features above (Complete C board) and the state of the art
WSHP Open multiple protocol interface
board will have the ability to be viewed in the
27
Guide specifications (cont)
crystal diode) display, alarm indicator and
fan speed control.
d. ZS Pro-F sensor with communication port,
occupancy status indicator, local occupancy
override, set point adjustment, LCD display, alarm indicator, fan speed control,
cooling/heating/fan only mode control
and F to C conversion.
9. Optional Controls:
a. Console units capable of remote mounted
controllers shall be field supplied with a 24
volt anticipating type wall thermostat. The
thermostat shall be a manual changeover
type with an OFF, HEAT, COOL selectors
switch and a FAN, AUTO selector switch.
The thermostat shall be an auto changeover type with an OFF, AUTO selector
switch and a FAN, AUTO selector switch.
The Hi/Lo fan switch shall be unit
mounted for fan speed control.
b. Outdoor air dampers shall be motorized
with a spring return. The damper shall
open when Cooling or Heating mode
selection is made from the unit-mounted
switches. With a remote thermostat, the
damper shall open any time the fan is in
operation.
G. Electrical Requirements:
1. A control box shall be located within the unit
compressor compartment and shall contain a
40 va transformer, 24-volt activated, 3-pole
compressor contactor, terminal block for
thermostat wiring and solid-state controller for
complete unit operation. Electro-mechanical
operation WILL NOT be accepted.
2. Units shall be nameplated for use with timedelay fuses or HACR circuit breakers.
3. Unit controls shall be 24-volt and provide heating or cooling as required by the remote thermostat.
4. Units shall be provided with a factory mounted
2 x 4 junction box with removable cover on the
same side as the water connections (left or right)
for direct wire connection. This cover may be
supplied with a non-fused power disconnect
switch for servicing the unit. The unit shall
operate with specified voltages 115 volt, 208/
230 volt or 265 volt, single phase, 60 Hz supply current. Supply power ampacity and maximum fuse size are per electrical specifications
marked on each unit’s data plate.
Equipment Touch™, System Touch™, or
field assistant user interface. All point
objects will have the ability to be viewed in
the Equipment Touch user interface. The
following points must be available at a central or remote computer location:
1) Space temperature.
2) Leaving water temperature.
3) Discharge air temperature.
4) Command of space temperature set
point.
5) Cooling status.
6) Heating status.
7) Low temperature sensor alarm.
8) High pressure switch alarm.
9) Fan on/off position of space thermostat.
10) Unoccupied/occupied command.
11) Cooling demand.
12) Heating demand.
13) Fan “ON/AUTO” command.
14) Fault prevention with auto reset.
15) Itemized fault code viewed with Equipment Touch interface.
b. Additional WSHP Open multiple protocol
control features shall include:
1) Independent fan speed control. Controller shall automatically, based upon
space temperature input, operate the
fan at the lowest of 2 fan speeds to
achieve space temperature set point.
2) Two-position OA (outdoor air) damper
3) Modulating OA damper with DCV
(demand controlled ventilation).
4) Power fail restart delay.
8. Multiple-protocol WSHP Open controller
remote ZS sensors for DDC (direct digital controls) control options. Only Carrier ZS sensors
can be used with the WSHP Open controller.
Sensors are available as follows, and all sensors below offer monitoring of space temperature only, or space temperature and CO2, or
space temperature and humidity, or space
temperature and CO2 and humidity.
a. ZS Standard sensor with a communication
port.
b. ZS Plus sensor with communication port,
occupancy status indicator, local occupancy
override and set point adjustment.
c. ZS Pro sensor with communication port,
occupancy status indicator, local occupancy
override, set point adjustment, LCD (liquid
Carrier Corporation • Syracuse, New York 13221
415
2-15
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Pg 28
Catalog No. 04-52500105-01
Printed in U.S.A.
Form 50PEC-10PD
Replaces: 50PEC-1APD