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Alpha InTec 40GS2 - Component Replacement
8.9 GAS VALVE - Fig. 8.1
Note:
The replacement of the gas valve or PCB must be carried out by a Gas Safe registered engineer with the use of a flue
analyser.
1. Gain access behind the front casing as in Section 8.1.
2. Disconnect the positive pressure tube from the gas valve.
3. Disconnect the electrical plug.
4. Disconnect the burner manifold pipe union and the gas inlet pipe union.
5. Remove the two screws from beneath the boiler and lift out the valve assembly.
6. Fit the new assembly and re-assemble in reverse order and test for gas tightness.
7. Light the boiler. (Refer to Commissioning, Section 6.4) and adjust the gas valve as described in the instructions supplied
with the replacement valve.
8. Complete re-assembly as described in Routine Servicing, Section 7.4 paragraphs 5 to 9.
8.10 FUSE - Fig. 8.2
The fuse is located on the PCB.
1. Gain access as described in Installation, Section 5.8.
2.
Lift out and remove the fuse. Fit a 3.15 AF 250 V (20 mm x 5 mm) fuse
as a replacement.
Note:
A spare fuse is supplied, as shown in Fig. 8.2. Check the
spare fuse has the correct value before installing it..
3. Re-assemble in reverse order.
8.11 PCB - Fig. 8.2
Note:
The replacement of the gas valve or PCB must be carried out by a
Gas Safe registered engineer with the use of a flue analyser.
1. Gain access behind the control panel as described in Section 8.1.
2. Disconnect all the wiring connectors from the PCB.
3. Remove the five fixing screws and carefully withdraw the board from the switch spindles.
4. Re-assemble in reverse order. Refer to the wiring diagram in Section 8.1 for connections.
5. Light the boiler and adjust the PCB as described in the instructions supplied with the replacement PCB.
8.12 DIVERTER VALVE MOTOR - Fig. 8.3
1. Gain access behind the front casing as described in Section 9.1.
2. Remove the diverter valve motor head by unplugging its electrical connection and withdrawing the retaining clip
upwards from the back of the motor.
3. Withdraw the motor forwards from the valve body.
4. Re-assemble in reverse order with a new motor.
Fig. 8.3
Fig. 8.2
PCB
PCB fuse
Spare fuse
DHW Flow
switch
Diverter valve
motor and
assembly
Flow switch
bottom fixing
screw
Retaining
clip
DHW temperature sensor
Condensate trap
Содержание InTec 40GS2
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