Worcester 29CDi GC 47-406-34 Installation, Commissioning And Servicing Instructions page 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.
The valve will require setting, follow procedure "Setting
the air/gas ratio" in the Servicing and spares section.
7.
A
C
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.
6 720 803 599 (2012/06)
B
6720647361-34.1Wo
D
9.
10.
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
SERVICING AND SPARES
A
B
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