SERVICING AND SPARES
6 720 806 548 (2013/02)36
Fig. 59 Sensors
7. GAS VALVE
▶ Isolate gas supply at boiler gas cock.
▶ Pull out air inlet tube (A).
▶ Undo top gas connection (B) to gas valve.
▶ Undo bottom gas connection (C) to gas valve.
▶ Undo two securing screws (D)on the underside of casing.
▶ Pull valve up and forward out of boiler.
▶ Disconnect electrical connections.
▶ Replace valve with new seals and check for gas soundness.
Fig. 60 Gas valve removal
8. SIPHON/CONDENSATE TRAP
1. Pull condensate pipe out of the adaptor.
2. Remove trap from boiler.
▶ Clean trap and check that the connection to the heat exchanger is
clear.
▶ Fill the condensate trap with approximately 1/4 litre of water and refit
in reverse order.
Fig. 61 Siphon removal
6720806548-12.1Wo
3.
4.
5.
The valve will require setting, follow procedure “Setting
the gas/air ratio” in the gas conversion section.
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