Download Ariston GENUS 27 RFFI SYSTEM Installation manual

Servicing Instructions
Type C Boilers
G.C.N:
41-116-01
47-116-08
47-116-09
47-116-13
LEAVE THESE INSTRUCTIONS
ADJACENT TO THE GAS METER
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TABLE OF CONTENTS
Page No.
1. SERVICING INSTRUCTIONS
1.1 Replacement of Parts
3
1.2 To Gain General Access
- Removing the Front Panel
- Removing the Bottom Cover
- Removing the Side Panels
3
4
4
1.3 Access to the Combustion Chamber
- Removing the Sealed Combustion Chamber
- Removing the Burner and Injectors
- Removing the Electrodes
- Removing the Main Heat Exchanger
- Removing the Air Pressure Switch
- Removing the Venturi Device
- Removing the Fan
5
5
6
7
7
8
8
1.4 Servicing and Removal of the Gas Valve
- Setting Gas Pressure
- Removing the Spark Generator (SIT Sigma Gas Valve)
- Removing the Spark Generator (SIT Tandem Gas Valve)
- Removing the Gas Valve
10
12
13
14
1.5 Access to the Hydraulic Circuit
- Removing the D.H.W. (Secondary) Exchanger
- Removing the Safety Valve
- Removing the Automatic Air Vent
- Removing the Main Flow Circuit Switch
- Removing the Pump
- Removing the Pressure Gauge
- Removing the Expansion Vessel
- Removing the Overheat Thermostat
- Removing the Heating Temperature Sensor (N.T.C.)
- Removing the D.H.W. Temperature Sensor (N.T.C.)
- Removing the Diverter Valve (Genus 27 RFFI Only)
14
15
15
15
16
16
17
17
17
18
18
1.6 Access to the Control System
- Checking the Fuses
- Removing the Time Clock
- Removing the P.C.B.s
19
19
20
2. FAULT FINDING
2.1 Fault Finding Guide (Flow-chart)
2.2 Fault Finding Using the Total Check System
21
26
3. ELECTRICAL DIAGRAMS
3.1 Electrical Connection
3.2 Functional Flow Connection
27
29
4. SHORT SPARE PARTS LIST
30
2
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1.
SERVICING
INSTRUCTIONS
To ensure efficient safe operation, it is recommended that the boiler is
serviced annually by a competent person.
Before starting any servicing work, ensure both the gas and electrical
supplies to the boiler are isolated and the boiler is cool.
Before and after servicing, a combustion analysis should be made via the flue
sampling point (please refer to the Installation Manual for further details).
After servicing, preliminary electrical system checks must be carried out to
ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and
short circuit).
1.1
Replacement
of Parts
The life of individual components vary and they will need servicing or
replacing as and when faults develop.
The fault finding sequence chart in chapter 2 will help to locate which
component is the cause of any malfunction, and instructions for removal,
inspection and replacement of the individual parts are given in the following
pages.
1.2
To Gain General
Access
All testing and maintenance operations on the boiler require the control panel
to be lowered. This will also require the removal of the casing.
To dismantle the front part of the casing, proceed as follows:
1. Loosen the two screws “A” located on the bottom part of the boiler until
the first thread on the screws appears (Fig. 1.1);
2. Lift the front panel up until it stops with a click and remove the front
panel from the rest of the casing (Fig. 1.2);
4. Unhook the two cords from the locating slots (Fig. 1.3).
Fig. 1.3
A
Fig. 1.1
Fig. 1.2
3
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Removing the bottom cover
1. Remove the screws “B”
B
Fig. 1.4
Removing the side panels
1. Remove the screws “C”;
2. Pull the panel away from the boiler,
then lift the panel up and away from
the boiler.
C
C
C
Fig. 1.5
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1.3
Access to the
Combustion Chamber
Removing the sealed chamber
frontal cover
D
Removing the combustion cover
D
E
E
E
Remove the screws “D”
E
D
D
E
E
E
Remove the screws “E”
Fig. 1.6
Removing the burner and the
injectors
Fig. 1.7
1. Remove the side panels of sealed chamber (fig. 1.8);
2. Remove the screws “F” of the burner (see fig. 1.9);
3. Remove the burner (see fig. 1.10);
4. Remove the injectors using a No. 7 socket spanner;
5. Replace in reverse order.
push
F
Fig. 1.9
push
Fig. 1.8
Fig. 1.10
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Removing the electrodes
1. Remove rubber gasket “G” (see fig. 1.11);
2. Disconnect ignition leads by pulling downward (see fig. 1.12);
3. To remove the flame sensor disconnect the cable at its only connection
point close to the P.C.B. (see fig. 1.13);
Fig. 1.12
G
Fig. 1.13
Fig. 1.11
5. Remove screw “H” using a Philips No. 2 star tip screwdriver (see fig. 1.14);
6. Slide the electrode gently downward (see fig. 1.15).
H
Fig. 1.14
Fig. 1.15
To replace, repeat the steps in reverse order, paying particular attention to the
following:
a - Centre the electrode in the positioning hole carefully, otherwise the
electrode may break;
b -Check that the cables have been connected correctly;
c - Check that the rubber gasket covers the cable/electrode connection
point completely.
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Removing the main heat
exchanger
1. Drain the boiler of water;
2. Release the two connection nuts “I” connecting the exchanger to the flow
and return pipes (see fig. 1.16);
3. Pull it straight out (see fig. 1.17).
I
Fig. 1.17
Fig. 1.16
Removing the air pressure switch
1. Disconnect the electrical connections “K” and silicone pipes “L” from their
connection points (see fig. 1.18);
2. Remove screws “J” on the top of the sealed chamber (see fig. 1.19);
Use a No. 2 star tip screwdriver to remove the switch from the plate.
J
L
J
K
L
Fig. 1.18
Fig. 1.19
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1. Disconnect the silicone pipes “M” and remove the screw “N”
(see fig. 1.20);
2. Extract the venturi (see fig. 1.21).
Removing the venturi device
N
M
Fig. 1.20
Fig. 1.21
Removing the fan
1. Disconnect electrical connections and remove screws
“O” using a No. 2 star tipped screwdriver (see fig.1.22);
2. Pull fan to the right and forward and remove (see fig.1.23);
3. Remove fan from mounting plate;
4. Remove screws “P” (see fig.1.24).
O
O
Fig. 1.22
P
P
Fig. 1.23
8
Fig. 1.24
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1.4
Servicing and Removal
of the Gas Valve
SIT
SIGMA
SIT
TANDEM
1
1
B
B
A
A
2
2
D
D
C
C
3
3
E
E
4
4
F
F
9
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Setting gas pressures
Setting the minimum and the maximum power of the boiler
1. Check that the supply pressure to the gas valve is a minimum of 20 mbar
for natural gas.
2. To do this, remove the screw “A”.
Fit the pipe of the pressure gauge to the pressure connection of the gas
valve “B”.
When you have completed this operation, replace the screw “A” securely
into its housing to seal off the gas.
3. To check the pressure supplied by the gas valve to the burner, remove the
screw “C”. Fit the pipe of the pressure gauge to the pressure outlet of the
gas valve “D”.
Disconnect the compensation pipe either from the gas valve or from the
sealed chamber.
4. Set the On/Off button to position < I > and the "summer/winter" switch to
the winter position.
To set the maximum power, turn on the hot water tap and allow the hot
water tap to run at a rate of about 8 litres/minute so that the main burner
lights.
Adjust nut “E” on the modureg to set the gas pressure (displayed on the
pressure gauge) corresponding to the maximum power (see table “A” page 11).
5. To set the minimum power, disconnect a supply terminal from the modureg
and adjust screw “F”.
Turn the screw clockwise to increase the pressure and counter-clockwise to decrease the pressure (displayed on the
pressure gauge) corresponding to the minimum power (see table “A” page
11).
6. When you have completed the above operations, turn off the
hot water tap, re-connect the supply terminal to the modureg
on the gas valve and replace the cap on the screw of the
modureg.
Setting the maximum heating circuit power
7. To set the maximum heating circuit power, place the
On/Off button to position < I > and the "summer/winter" switch to winter
position.
Turn the knob of the heating thermostat clockwise to maximum;
8. Remove the left hand inspection panel of the P.C.B. and fit a small
cross-head screwdriver in to the right hand potentiometer. Turn clockwise
to increase the pressure or counter-clockwise to reduce the pressure.
Adjust the setting to the required heating pressure value (displayed on the
pressure gauge), as indicated in the diagrams shown in page 11.
9. Turn off the boiler by placing the main switch to the "Off" position.
Setting pressure for soft ignition.
Disconnect the detection electrode connection from the P.C.B. (see fig.
1.13).
Start the boiler and during the ignition sequence adjust the centre
potentiometer until the gas pressure reads the required gas pressure as
per the table below.
Once the gas pressure is set turn off the boiler and reconnect the
connection to the P.C.B.
NB.: It may be necessary to reset the flame failure reset a number of times
during this operation.
Recommended pressure for
slow ignition
NATURAL GAS (G20)
BUTANE GAS (G30)
PROPANE GAS (G31)
5 mbar - 1.95 in w.g.
18 mbar - 7.0 in w.g.
19 mbar - 7.4 in w.g.
10
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Regulating the heating power for
natural gas (G20)
model 23
model 27
Regulating the heating power for
butane gas (G30)
model 23
model 27
Regulating the heating power for
propane gas (G31)
40
38
36
34
model 23
model 27
TABLE “A”
11
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10. Remove the pipe from the pressure gauge and connect screw “C” to the
pressure outlet in order to seal off the gas.
11. Carefully check the pressure outlets for gas leaks (valve inlet
and outlet).
IMPORTANT!
Whenever you disassemble and reassemble the gas connections, always
check for leaks using a soap and water solution.
Anti-cycling
Device
Soft-light
Adjustment
Max Heating
Adjustment
Setting the anti-cycling device
This appliance is equipped with a potentiometer which delays the ignition of
the heating control and is situated on the P.C.B. (see the electrical diagrams).
By adjusting the potentiometer, it is possible to change the time interval
between the burner shutting down and its next ignition.
It is preset at 1 minute and can be adjusted from 0 to 2 minutes.
Use this control in particular situations where continuous shutting down and
ignition of the main burner occurs.
Removing the spark generator (SIT Sigma gas valve)
1. Disconnect ignition leads “Q” by pulling upwards
(see fig. 1.25);
2. Remove the screws “R” (see fig. 1.26) with a Pozidrive
No. 2 star tip screwdriver;
3. Remove the spark generator.
Q
Fig. 1.25
R
Fig. 1.26
12
Fig. 1.27
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Removing the spark generator (SIT Tandem gas
valve)
1. Disconnect ignition leads “Q1” by pulling upwards
(see fig. 1.28);
2. Remove the screws “R1” (see fig. 1.29) with a Pozidrive
No. 2 star tip screwdriver;
3. Remove the spark generator.
Q1
Fig. 1.28
R1
R1
Fig. 1.29
Fig. 1.30
13
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Removing the gas valve
1. Disconnect all the cables from the solenoid and
modureg;
2. Remove the spark generator;
3. Release the top nut “S” using a 30 mm open ended
spanner (see fig. 1.31);
4. Remove the screws “T” from the bottom of the gas
valve pipe (see fig. 1.32).
Attention!! The gas valve is connected with the two pipes
(as shown) with an O-ring connection.
S
T
1.5
Fig. 1.31
Fig. 1.32
Fig. 1.33
Fig. 1.34
Access to Hydraulic
Circuits
U
T
Important! Before any component is removed, the boiler
must be drained of all water.
Removing the D.H.W. (secondary)
exchanger
1. Remove the screw “U” (see fig. 1.35);
2. Push the exchanger towards the rear of the
boiler, lift upwards and remove out of the
front of the boiler;
3. Before replacing the exchanger ensure that
the O-rings are in good condition and
replace if necessary.
U
Fig. 1.35
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Removing the safety valve
1. Loosen nut “V” (see fig. 1.36);
2. Remove the valve.
V
Fig. 1.36
Removing the automatic air vent
1. Unscrew valve “W” (see fig. 1.37).
W
Fig. 1.37
Removing the main circuit flow
switch
1. Remove the cable of the main circuit flow switch “Y”;
2. Remove the screws “Y1” (see fig. 1.38);
3. Remove the main circuit flow switch.
Y
Y1
Y1
Fig. 1.38
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Removing the pump
1. Unscrew “Z” and remove the electrical connection
(see fig. 1.39);
2. Release the nuts “A1” and remove the pump
(see fig. 1.40).
A1
Z
A1
Fig. 1.39
Fig. 1.40
Removing the pressure gauge
1. Remove the pressure gauge cover by pulling
(see fig. 1.41);
2. Release coupling “A2” using a 14 mm open ended
spanner (see fig. 1.42);
3. Push the pressure gauge through the control panel
from the rear (see fig. 1.43).
Fig. 1.41
A2
Fig. 1.42
16
Fig. 1.43
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Removing the expansion vessel
1. Remove nut “A3” away from the expansion vessel
(see fig. 1.44);
2. Remove nut “A4” (see fig. 1.45);
3. Remove expansion vessel (see fig. 1.46).
A3
Fig. 1.44
A4
Fig. 1.45
Fig. 1.46
Removing the overheat thermostat
1. Remove the electrical connector by the overheat
thermostat (see fig. 1.47);
2. Pull off the thermostat connections. Then remove the
thermostat from the pipe by releasing it’s securing clip.
Fig. 1.47
Removing the heating temperature sensor (N.T.C.)
1. Remove the electrical connector by pulling off the
thermostat connections and unscrewing the sensor
probe with a 14 mm open ended spanner (see fig.
1.48).
Fig. 1.48
17
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Removing the D.H.W. temperature sensor (N.T.C.)
1. Remove the electrical connector by pulling off the
thermostat connection and unscrew the sensor probe
with a 14 mm open ended spanner (see fig. 1.49).
Fig. 1.49
Removing the diverter valve (Genus 27 RFFI only)
1. Remove the circlip and pull the diverter valve to the left.
Fig. 1.50
18
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1.6
Access to the Control
System
Checking fuse
1. Remove the right hand inspection cover (see fig. 1.51);
2. Remove fuse (see fig. 1.52).
Fig. 1.51
Fig. 1.52
Removing the time clock
1. Remove left hand inspection cover (see fig. 1.53);
2. Remove electrical connection “A5” of the clock (see fig.
1.54);
3. Unscrew “A6” and remove (see fig. 1.55).
N.B.
It is possible to by-pass the time clock in the event of
failure by simply unplugging the electrical connection from
the P.C.B. (see fig. 1.54). This will revert control of the
central heating to the room stat connection on the reverse
of the control panel.
Fig. 1.53
A5
A6
A5
A6
Fig. 1.49
Fig. 1.50
19
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A7
A7
A7
Removing the P.C.B.s
1. Isolate electricity;
2. Remove the front cover of the boiler;
3. Remove both left and right inspection panels;
4. Remove the pressure gauge cover;
5. Remove the mounting screws “A7’ (see fig. 1.51);
6. Disconnect the connection cable”A8” (see fig. 1.52);
7. To remove the 24V P.C.B.: remove the electrical plug
connectors and screws “A9” (see fig. 1.53);
8. To remove the 240V P.C.B.: remove the electrical plug
connectors and screws “A10” (see fig. 1.54);
9. Replace either P.C.B. in reverse order.
A7
Fig. 1.51
A9
A8
A9
A10
A10
A8
Fig. 1.52
Fig. 1.53
20
Fig. 1.54
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2.
2.1
FAULT FINDING
Fault Finding Guide
(Flow-chart)
It is possible to detect and correct any defect by using the standard fault
finding diagrams described in this chapter.
Preliminary Checks
Make sure that:
1) There is sufficient
water in the system
2) The gas is turned on
3) The electricity to the
boiler is on
Press the
On / Off Button
HAS
THE LIGHT fOR
THE POWER SUPPLY
COME ON?
NO
1) Check the fuses
2) Check the power
supply cord, plug and
outlet
3) Check/replace the power
supply P.C.B.
YES
SETTING
FOR THE OPERATING
MODE
SUMMER
WINTER
FUME DISCHARGE TEST
IS HOT
WATER BEING
DEMANDED?
NO
YES
YES
IS HOT
WATER BEING
DEMANDED?
NO
NO
FOR BOILERS
EQUIPPED WITH AN
ELECTRONIC ANT-FREEZE
SYSTEM: HAS THE SAFETY BEEN
TRIGGERED TO ACTIVATE
THE DEVICE?
(T sensor <5˚C)
DO THE
TIME CLOCK
AND/OR R O O M
THERMOSTAT NEED
TO BE ACTIVATED
YES
YES
NO
YES
FOR BOILERS
EQUIPPED WITH AN
ELECTRONIC ANT-FREEZE
SYSTEM: HAS THE SAFETY BEEN
TRIGGERED TO ACTIVATE
THE DEVICE?
(T sensor <5˚C)
NO
A
21
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A
DOES THE
CIRCULATION PUMP
COME ON?
NO
YES
POWER TO
THE PUMP?
YES
1) Check for air in the
system
2) Check the pressure switch
for activating pump
3) Check/replace pressure
gauge and refill the
the system properly
DOES THE
INSUFFICIENT WATER
INDICATOR LIGHT COME
ON? (within
40 sec.)
NO
1) Turn the boiler off
and then back on
again (safety reset)
NO
YES
1) Check to see if pump is
stuck
2) Replace circulation pump
1) Check
wiring
2) Check/replace
wire to P.C.B.
3) Replace
power supply
P.C.B.
4) Replace control
P.C.B.
5) Check microswitch when hot
water is requested.
B
22
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B
DOES THE FAN
COME ON?
YES
NO
BOILER
SHUTDOWN?
YES
1) Reset the boiler
YES
1) Check/replace differential
pressure switch for pump
2) Check/replace wiring
3) Check/replace P.C.B. wire
4) Check/replace power
supply P.C.B.
5) Check/replace control
P.C.B.
YES
1) Check/replace air
pressure switch/wiring
2) Check whether reset
button is stuck
3) Check/replace flame
detection electrode
NO
C
PUMP
SAFETY DEVICE
ACTIVATED?
NO
INTERNAL
SAFETY DEVICE
FOR PCB
ACTIVATED?
NO
IS THERE POWER
TO THE FAN?
YES
NO
1) Check/replace wiring
2) Check/replace P.C.B. wire
3) Check/replace power
supply P.C.B.
4) Check/replace control
P.C.B.
5) Check/replace air
pressure switch
1) Replace fan
23
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C
IS
THE AIR PRESSURE
SWITCH ACTIVATED?
NO
YES
ARE THE
FUMES DISCHARGED
CORRECTLY?
NO
1) Check flue discharge
2) Check venturi & small pipes
3) Check wire for air press.switch
4) Check/replace air press. switch
5) Check/replace P.C.B.wire
6) Check/replace power P.C.B.
7) Check/replace control P.C.B.
1) Check/replace ignition electrodes
2) Check wiring
3) Check spark generator
4) Check small wire
5) Check power supply P.C.B.
6) Check control P.C.B.
YES
DOES THE
BURNER LIGHT?
NO
1) Check supply of gas to gas
valve
2) Check power supply P.C.B.
3) Check control P.C.B.
4) Check functionality of the gas
valve
YES
1) Check whether flame
detection electrode is
postioned in the flame
2) Check the electrode
3) Check the power P.C.B.
4) Check the control P.C.B.
YES
SAFETY
SHUTDOWN OF THE
BOILER ACTIVATED?
NO
D
NO
WAS THE
RESET SWITCH
PRESSED?
YES
Shutdown L.E.D. off
Restart of the fan
24
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D
IS
THERE STILL A
PROBLEM?
YES
NO
FUNCTIONS
NORMALLY
LIST OF MALFUNCTIONS
POSSIBLE CAUSES
1 Delivery of hot water for domestic use:
when the tap is turned on, the burner goes out.
- Air in the secondary exchanger
- Hot water pressure switch is defective
- 3-way valve is defective
2 Delivery of hot water for domestic use:
the radiatores are heated in summer mode.
- 3-way valve is defective
3 Delivery of hot water for domestic use:
water temperature is not satisfactory.
-
Check sensors for domestic and heating water
Check gas settings and regulation
Check water flow rate
Check secondary exchanger
4 Delivery of hot water for domestic use:
noisy operation.
-
Primary exchanger is defective
Low water pressure in heating system
Check gas settings and regulation
Check ntc sensor for domestic hot water
5 Drop/increase in pressure in primary circuit.
-
Check for leaks in heating circuit
Defective water supply inlet valve
Secondary exchanger is defective
Expansion vessel is empty
6 Repeated shutdowns.
- Detection electrodes are defective
- Check gas settings and regulation
- Check electrical circuit for flamedetection
7 Safety thermostat is triggered repeatedly.
- Faulty(contacts)N.T.C. sensors-heating/hot water
- Defective (poorly calibrated) safety thermostat
- Presence of air in the primary water circuit
8 When the cold water tap is turned off, the
boiler comes on.
- Drop in pressure in the water mains, resulting
in water hammering
9 Temperature of radiators not satisfactory.
- Check N.T.C. sensor for heating
- Check by-pass
- Check gas settings and regulation
25
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2.2
Fault Finding Using the
Total Check System
Malfunction
Signalling
Boiler Off
1
2
3
4
5
6
Auto diagnostic state
A
b
C
d
Faulty ventilation system
E
F
G
I
m
Faulty flame detection
Air pressure switch stuck in N.O. position
Faulty reset switch
Faulty main circuit flow switch
Spark ignition state
Boiler functioning normally
Lockout
Boiler thermostat satisfied
Room thermostat/clock no demand or
selector in summer setting
Faulty overheat thermostat
Faulty exhaust fumes sensor
Faulty heating sensor (N.T.C.)
Faulty D.H.W. sensor (N.T.C.)
Pump fed
Main flow switch closed
Air pressure switch N.O.
Flame detected
Water at required temperature
Room thermostat/clock no demand or
selector in summer setting
Auto diagnostics faulty
D.H.W. exchanger efficiency control
Heating circuit efficiency control
Heating temperature control
D.H.W. temperature control
26
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3.
ELECTRIC
DIAGRAMS
Legend:
AT
BT
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Aa
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
High Voltage P.C.B.
Low Voltage P.C.B.
Remote Connector Kit
Flame Failure L.E.D.
Insufficient Water Pressure L.E.D.
Water Temperature Indicator L.E.D.s
Overheat Thermostat Warning L.E.D.
System Reset Button
Selector Knob for Operating Mode
Domestic Hot Water Temp. Adjustment
Central Heating Temp. Adjustment
Wire Connector for Room Thermostat
Connector for Total Check System
Selector for Local/Remote Control
Anti-cycling Device Adjustment for Heating
Soft-light Adjustment
Max Heating Temperature Adjustment
Time Clock Connection
On/Off L.E.D.
On/Off Switch
Interface Wire for P.C.B.s
Relay Motorised Valve
Ignitor Relay
Gas Valve Relay
Fan Relay
Circulation Pump Relay
Selector TCS2
Link for Continuous Pump Run
Adaptor (British Gas use only)
A01 =
A02 =
A03 =
A04 =
A05 =
A06 =
A07 =
A08 =
A09 =
A10 =
A11 =
A12 =
Air Pressure Switch
Fan
Gas Valve
Ignitor
Motorised Valve
Circulation Pump
Flame Detector
Earth Terminal
Flame Detection Circuit
Flame Indicator L.E.D.
Transformer
Filter
B01 =
B02 =
B03 =
B04 =
Over Heat Thermostat
External Thermostat
Gas Valve Modulator
D.H.W. Probe Sensor Cylinder (RFFI SYSTEM models only)
B05 =
B06 =
B07 =
Heating Sensor
Pressure Switch for Heating Circuit
Microswitch for Diverter Valve (MFFI models only)
Colours
Gry
Rd
Bl
Grn/Yll
Wh
Brn
Blk
Wh/Rd
= Grey
= Red
= Blue
= Yellow/Green
= White
= Brown
= Black
= White/Red
27
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 23/27/30 MFFI
Aa
GENUS 27 RFFI SYSTEM
Aa
28
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 23/27 MFFI
CN202
P
GENUS 27 RFFI SYSTEM
P
29
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
4.
SHORT SPARE
PARTS LIST
GENUS 23/27 MFFI (SIT Sigma Gas Valve)
2 71 70 63 69 68 65 66 67 66 65 64 63 62 61 60 59 58 57
56
1
2
74
74
72
3
73
124
301
301
4
4
5
74
4
123
75
4
62
78
6
122
76
121
77
79
7
302
303
305 306
304
120
55
7
80
8
119
9
81
10
118
117
11
115
116
110
82 102
83
87
11
86
84
12
85
86
95
85
88
94
89
91
18
52
51
50
49
48
47
106
109
108
46
45
44
107
44
97
84
43
44
42
41
40
39
39
38
92
18
17
105
98
100
93
23
15
16
53
89
90
11
113
112
111
48
51
101
98
13
14
103
104
99
96
54
114
81
19 20
91
21
36
22
23 24 25
26
100
27
28
29 30 31 32 33
34 35 36
37
16
361
362
364
363
321
17
22
371
372
373
311
374
375
23/27 MFFI
30
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 30 MFFI (SIT Sigma Gas Valve)
2 72 71 64 70 69 66 67 68 67 66 65 64 63 62 61 60 59 58
57
1
2
75
75
73
3
126
74
125
301
301
4
4
5
75
4
124
76
4
63
79
6
123
77
122
78
7
302
303
305 306
304
121
80
56
7
81
8
120
9
82
10
119
118
11
116
117
111
83 103
84
88
11
87
85
12
86
87
96
86
89
14
95
90
92
19
53
52
51
50
49
48
107
110
109
47
46
45
108
45
98
85
44
45
43
42
41
40
40
39
93
18
18
106
99
101
94
24
16
17
54
90
91
11
114
113
112
49
52
102
99
97
15
104
105
100
13
55
115
82
20 21
92
22
37
23
24 25 26
27
101
28
29
30 31 32 33 34
35 36 37
38
17
361
362
364
363
321
18
23
371
372
373
311
374
375
30 MFFI
31
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 27 RFFI SYSTEM (SIT Sigma Gas Valve)
2 73 72 65 71 70 67 68 69 68 67 66 65 64 63 62 61 60 59
58
1
2
76
76
74
3
75
119
301
301
4
4
5
76
4
118
77
4
64
117
78
116
79
80
6
302
305 306
304
303
115
81
57
7
7
82
8
9
113
112
83
10
56
109
83
110
114
108
111
55
107
106
11
54
105 50
84 97
98
85
11
99
96
87
12
101
93
95
86
53
52
51
50
49
53
100
104
102
48
47
46
103
94
93
13
14
88
46
92
45
86
46
89
11
44
43
42
41
40
90
11
15
16
16
11
41
91
23
38
23
17
19 20 21 22 23
18
24 23 25 26
20
27
28
29
30
31 32 33 34 35
36 37 38
39
95
371
372
373
374
321
375
19
362
361
363
27 MFFI SYSTEM
32
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 23/27 MFFI (SIT Sigma Gas Valve)
Key
no.
G.C. part
no.
1
11
14
17
18
19
23
24
25
28
31
43
45
46
56AB
56CD
57
60
71AB
71CD
74
83
84
86
88AB
88CD
89
91
94
95AB
95CD
98
99
100
106
110
114
116
117
118A
118B
118C
118D
119AB
119CD
301
311
321
361
362
363
364
371
372
373
374
375
381
382
379816
164 225
164 338
164 229
378 814
E03 818
E02 071
379 079
164 230
164 282
379 981
164 261
379 979
379 980
E02 026
E02 078
164 311
ARISTON
Part No.
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Main flow Switch
Temp probe (C.H.W.)
Microswitch for 3-way/main flow group
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
Pressure gauge
Time clock
P.C.B. E C-MI/FFI
P.C.B. EI A-MFFI
P.C.B. cable
Fan
Fan
Fan inlet gasket
Venturi (exhaust manifold/header)
Air pressure switch
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
O-ring
Secondary exchanger (plate-type) exchanger 23kW
Secondary exchanger (plate-type) exchanger 27kW
O-ring (secondary exchanger)
20-18 O-ring
Gasket 3/8"
Pump
Pump
O-ring (13)
Gasket
Gas valve (SIT Sigma)
Spark generator
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main burner
Main burner
Main exchanger
Main exchanger
Front panel runner kit
D.H.W. actuator kit
SIT Sigma gas valve operator coils
Heating by-pass kit
D.H.W. pressure switch kit
3-way spring kit
D.H.W. diaphram valve
Main flow switch diaphram
Main flow switch magnet
Main flow switch spring
Main flow switch top cap
Main flow switch reed system
Burner jet 1.25 full kit (Natural gas)
Burner jet 0.72 full kit (LPG)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
573294
573520
997206
573224
569236
573340
573528
573727
573172
571649
997208
953045
952981
952610
572989
572990
573343
573314
571651
571652
570717
564254
569387
571449
571646
573295
573825
571807
573521
997150
997151
571965
574279
574232
574233
573441
569390
569560
569561
572271
572277
572343
572372
572749
572835
571993
571444
997029
571443
571442
571447
571446
571547
571772
571771
571770
573138
569281
569282
33
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 30 MFFI (SIT Sigma Gas Valve)
Key
no.
G.C. part
no.
1
11
15
16
19
20
24
25
26
29
32
44
46
47
57
58
72
75
84
85
87
89
90
92
95
96
99
100
101
107
111
115
117
118
119A
119B
120
126
301
311
321
361
362
363
364
371
372
373
374
375
381
382
379816
164 225
164 338
164 229
378 814
E02 071
379 079
164 230
164 282
379 981
164 261
379 979
379 980
ARISTON
Part No.
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Main flow Switch
Temp probe (C.H.W.)
Microswitch for 3-way/main flow group
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
Pressure gauge
Time clock
P.C.B. E C-MI/FFI
P.C.B. EI A-MFFI
P.C.B. cable
Fan
Fan inlet gasket
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
O-ring
Secondary exchanger (plate-type) exchanger 27kW
O-ring (secondary exchanger)
O-ring (20-18)
Gasket 3/8"
Pump
O-ring (13)
Gasket
Gas valve (SIT Sigma)
Spark generator
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main exchanger
Venturi (exhaust manifold/header)
Front panel runner kit
D.H.W. actuator kit
SIT Sigma gas valve operator coils
Heating by-pass kit
D.H.W. pressure switch kit
3-way spring kit
D.H.W. diaphram valve
Main flow switch diaphram
Main flow switch magnet
Main flow switch spring
Main flow switch top cap
Main flow switch reed system
Burner jet 1.30 full kit (Natural gas)
Burner jet 0.77 full kit (LPG)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
34
573294
573520
997206
573224
569236
573340
573528
573727
573172
571649
997208
953045
952981
952610
572990
573343
571652
570717
564254
569387
571449
573295
573825
571807
573521
997151
571965
574279
574232
574233
573441
569390
569560
569561
998110
998111
572835
573314
571993
571444
997029
571443
571442
571447
571446
571547
571772
571771
571770
573138
998152
998432
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 27 RFFI SYSTEM (SIT Sigma Gas Valve)
Key
no.
G.C. part
no.
1
11
14
17
20
21
23
25
26
28
30
33
45
47
48
58
59
62
73
76
85
86
87
89
93
94
95
101
105
109
111
112
113A
113B
114
301
321
361
362
363
375
381
382
379816
164 225
164 338
164 229
378 814
E02 071
379 079
164 282
379 981
164 261
379 979
379 980
E02 078
164 311
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Motorised valve motor
Main flow switch
Temp probe (C.H.W.)
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
D.H.W. probe
Pressure gauge
Time clock
P.C.B. EB C MI/FFI
P.C.B. E A-FFI/P
P.C.B. cable
Fan
Fan inlet gasket
Venturi (exhaust manifold/header)
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
Pump
Gasket 3/8"
O-ring (13)
Gasket
Gas valve (SIT Sigma)
Spark generator
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main exchanger
Front panel runner kit
Sit Sigma gas valve operator coils
Heating by-pass kit
Sanitary pressure switch kit
Way and unit kit
Main flow switch reed system
Burner jet 1.25 full kit (Natural gas)
Burner jet 0.72 full kit (LPG)
ARISTON
Part No.
573294
573520
997206
997147
573224
569236
573528
573727
573172
950650
571649
997208
953095
952935
952610
572990
573343
573314
571652
570717
564254
569387
997151
573521
571965
574279
574232
574233
573441
569390
569560
569561
572343
572372
572835
571993
997029
571443
571987
571447
573138
569281
569282
35
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 23/27 MFFI (SIT Tandem Gas Valve)
2 71 70 63 69 68 65 66 67 66 65 64 63 62 61 60 59 58 57
56
1
2
74
74
72
3
73
126
301
301
4
4
5
74
4
125
75
4
62
124
76
78
6
123
77
7
302
303
305 306
304
122
79
55
7
80
8
9
81
10
120
119
11
82
97
87
85
99
86
100
96
85
88
94
91
18
104
107
46
45
44
44
43
44
104
42
41
40
105
39
39
38
92
91
18
17
51
106
93
23
15
16
84
89
90
11
52
51
50
49
48
47
102
103
95
89
53
109
101
13
14
112
115
114
113
48
108
86
84
12
118
110
98
11
117
111
83
54
116
81
121
19 20
21
36
22
23 24 25
17
26
27
28
29 30 31 32 33
34 35 36
37
99
371
321
372
373
374
322
323
375
16
22
361
362
364
311
363
23/27 MFFI
36
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 30 MFFI (SIT Tandem Gas Valve)
2 72 71 64 70 69 66 67 68 67 66 65 64 63 62 61 60 59 58
57
1
2
75
75
73
3
128
74
127
301
4
301
4
5
75
4
126
76
4
63
79
6
125
77
124
78
7
302
123
80
303
305 306
304
56
7
81
8
122
9
82
10
121
120
11
83
98
88
86
87
86
89
100
101
97
14
95
92
18
19
105
108
47
46
45
45
44
45
105
43
42
41
106
40
40
39
93
92
19
17
85
94
24
16
52
107
90
91
11
53
52
51
50
49
48
103
104
96
90
54
110
102
13
15
116
115
114
49
109
87
85
12
113
111
99
11
118
119
112
84
55
117
82
20 21
37
22
23
24 25 26
18
27
28
29
30 31 32 33 34
35 36 37
38
100
371
321
372
373
374
322
323
375
17
23
361
362
364
311
363
30 MFFI
37
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 27 RFFI SYSTEM (SIT Tandem Gas Valve)
2 73 72 65 71 70 67 68 69 68 67 66 65 64 63 62 61 60 59
58
1
2
76
76
74
3
75
121
301
301
4
4
5
76
4
120
77
4
64
119
78
118
79
80
6
302
305 306
304
303
117
81
57
7
7
82
8
9
115
10
11
83
112
100
85
11
101
98
97
87
12
107
102
54
50
53
52
51
50
49
53
106
93
104
48
47
46
105
96
13
14
55
109
108
103
99
86
110
113
114
84
56
111
83
116
46
95
94
88
45
86
93
89
11
46
44
43
42
41
40
92
90
11
15
11
16
16
41
91
23
38
23
17
18
19 20 21 22 23
24 23 25 26
20
27
28
29
30
31 32 33 34 35
36 37 38
39
98
371
321
372
373
374
322
323
375
19
362
361
363
27 MFFI SYSTEM
38
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 23/27 MFFI (SIT Tandem Gas Valve)
Key
no.
G.C. part
no.
1
11
14
17
18
19
23
24
25
28
31
43
45
46
56AB
56CD
57
60
71AB
71CD
74
83
84
86
88AB
88CD
89
91
94
96AB
96CD
99
101
104
112
116
118
119
120A
120B
120C
120D
121AB
121CD
301
311
321
322
323
361
362
363
364
371
372
373
374
375
381
382
379816
164 225
164 338
164 229
378 814
E03 818
E02 071
379 079
164 230
164 282
379 976
379 981
164 261
379 979
379 980
E02 026
E02 078
378 978
378 815
164 303
164 311
ARISTON
Part No.
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Main flow Switch
Temp probe (C.H.W.)
Microswitch for 3-way/main flow group
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
Pressure gauge
Time clock
P.C.B. E C-MI/FFI
P.C.B. EI A-MFFI
P.C.B. cable
Fan
Fan
Fan inlet gasket
Venturi (exhaust manifold/header)
Air pressure switch
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
O-ring
Secondary exchanger (plate-type) exchanger 23kW
Secondary exchanger (plate-type) exchanger 27kW
O-ring (secondary exchanger)
O-ring (20-18)
Gasket 3/8"
Pump
Pump
Gas valve (SIT Tandem)
Spark generator
O-ring (13)
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main burner
Main burner
Main exchanger
Main exchanger
Front panel runner kit
D.H.W. actuator kit
SIT Tandem gas valve operator coils
SIT Tandem modureg coil
Gas modulator cartridge
Heating by-pass kit
D.H.W. pressure switch kit
3-way spring kit
D.H.W. diaphram valve
Main flow switch diaphram
Main flow switch magnet
Main flow switch spring
Main flow switch top cap
Main flow switch reed system
Burner jet 1.25 full kit (Natural gas)
Burner jet 0.72 full kit (LPG)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
573294
573520
997206
573224
569236
573340
573528
573727
573172
571649
997208
953045
952981
952610
572989
572990
573343
573314
571651
571652
570717
564254
569387
571449
571646
573295
573825
571807
573521
997150
997151
570732
573023
571965
573441
569390
569560
569561
572271
572277
572343
572372
572749
572835
571993
571444
570712
573740
573745
571443
571442
571447
571446
571547
571772
571771
571770
573138
569281
569282
39
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 30 MFFI (SIT Tandem Gas Valve)
Key
no.
G.C. part
no.
1
11
15
18
19
20
24
25
26
29
32
44
46
47
57
58
72
75
84
85
87
89
90
92
95
97
100
102
105
113
117
119
120
121A
121B
122
128
301
311
321
322
323
361
362
363
364
371
372
373
374
375
381
382
379816
164 225
164 338
164 229
378 814
E02 071
379 079
164 230
164 282
379 976
379 981
164 261
379 979
379 980
378 978
378 815
164 303
ARISTON
Part No.
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Main flow Switch
Temp probe (C.H.W.)
Microswitch for 3-way/main flow group
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
Pressure gauge
Time clock
P.C.B. E C-MI/FFI
P.C.B. EI A-MFFI
P.C.B. cable
Fan
Fan inlet gasket
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
O-ring
Secondary exchanger (plate-type) exchanger 27kW
O-ring (secondary exchanger)
O-ring (20-18)
Gasket 3/8"
Pump
Gas valve (SIT Tandem)
Spark generator
O-ring (13)
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main exchanger
Venturi (exhaust manifold/header)
Front panel runner kit
D.H.W. actuator kit
SIT Tandem gas valve operator coils
SIT Tandem modureg coil
Gas modulator cartridge
Heating by-pass kit
D.H.W. pressure switch kit
3-way spring kit
D.H.W. diaphram valve
Main flow switch diaphram
Main flow switch magnet
Main flow switch spring
Main flow switch top cap
Main flow switch reed system
Burner jet 1.30 full kit (Natural gas)
Burner jet 0.77 full kit (LPG)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
40
573294
573520
997206
573224
569236
573340
573528
573727
573172
571649
997208
953045
952981
952610
572990
573343
571652
570717
564254
569387
571449
573295
573825
571807
573521
997151
570732
573023
571965
573441
569390
569560
569561
998110
998111
572835
573314
571993
571444
570712
573740
573745
571443
571442
571447
571446
571547
571772
571771
571770
573138
998152
998432
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
GENUS 27 RFFI SYSTEM (SIT Tandem Gas Valve)
Key
no.
1
11
14
17
20
21
23
25
26
28
30
33
45
47
48
58
59
62
73
76
85
86
87
89
93
96
98
107
111
113
114
115A
115B
115
301
311
321
322
323
361
362
363
371
372
373
374
375
381
382
G.C. part
no.
164 225
164 338
164 229
378 814
E02 071
379 079
164 230
164 282
379 976
379 981
164 261
379 979
379 980
E02 078
378 978
378 815
164 303
164 311
Description
Expansion vessel
Gasket 3/4"
Overheat thermostat
Motorised valve motor
Main flow switch
Temp probe (C.H.W.)
Gasket 1/2"
Manual vent cock
Safety valve 3 bar 1/2"
D.H.W. probe
Pressure gauge
Time clock
P.C.B. EB C MI/FFI
P.C.B. E A-FFI/P
P.C.B. cable
Fan
Fan inlet gasket
Venturi (exhaust manifold/header)
Air pressure switch
Fastening spring
Automatic air release valve
Gasket 1"
Pump
Gasket 3/8"
O-ring (13)
Spark generator
Gas valve (SIT Tandem)
Detection electrode
Gasket 1/4"
Ignition electrode (R.H.)
Ignition electrode (L.H.)
Main burner
Main burner
Main exchanger
Front panel runner kit
D.H.W. actuator kit
SIT Tandem gas valve operator coils
SIT Tandem modureg coil
Gas modulator cartridge
Heating by-pass kit
D.H.W. pressure switch kit
3-way spring kit
Main flow switch diaphram
Main flow switch magnet
Main flow switch spring
Main flow switch top cap
Main flow switch reed system
Burner jet 1.25 full kit (Natural gas)
Burner jet 0.72 full kit (LPG)
ARISTON
Part No.
573294
573520
997206
997147
573224
569236
573528
573727
573172
997274
571649
997208
953095
952935
952610
572990
573343
573314
571652
570717
564254
569387
997151
573521
571965
573023
570732
573441
569390
569560
569561
572343
572372
572835
571993
571444
570712
573740
573745
571443
571442
571447
571547
571772
571771
571770
573138
998152
998432
41
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
NOTES
42
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
43
B005
Supplied By www.heating spares.co Tel. 0161 620 6677
Manufacturer:
Merloni TermoSanitari SpA - Italy
Commercial subsidiary: MTS (GB) LIMITED
MTS Building
Hughenden Avenue,
High Wycombe
Bucks HP13 5FT
Telephone: (01494) 755600 Fax: (01494) 459775
Technical Service Hotline: (01494) 539579
23 99 84 1267 000 - B005
Supplied By www.heating spares.co Tel. 0161 620 6677
Stampa: Bieffe Recanati