SERVICING AND SPARES
6 720 803 599 (2012/06) 41
7. GAS VALVE
B Isolate gas supply at boiler gas cock.
B Pull out air inlet tube (A).
B Undo top gas connection (B) to gas valve.
B Undo bottom gas connection (C) to gas valve.
B Undo two securing screws (D)on the underside of casing.
B Pull valve up and forward out of boiler.
B Disconnect electrical connections.
B Replace valve with new seals and check for gas tightness.
Fig. 55 Gas valve removal
8. SIPHON
To remove and replace the siphon:
B Pull condensate pipe out of the adaptor.
B Remove siphon from the boiler.
B Fit the new siphon to the sump and ensure that condensate discharge
pipe is firmly connected to the outlet pipe work.
Fig. 56
9. ACCESS TO BOILER CONTROL COMPONENTS
B Remove 3 screws (A) and remove cover from control.
10. PCB FUSE
B Remove fuse (B) from the PCB and replace.
B There is a spare fuse clipped into the cover.
Fig. 57 Component and fuse access
11. PCB REMOVAL
To gain access to the PCB:
B Remove the five screws shown in the diagram below and remove the
PCB cover.
Fig. 58 PCB access
The valve will require setting, follow procedure “Setting
the air/gas ratio” in the Servicing and spares section.
7.
A
B
D
C
6720647361-34.1Wo
6720647361-31.2Wo
6720647361-35.2Wo
A
B
9.
10.
6720647361-36.2Wo
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