Bosch Worcester GREENSTAR CDi CLASSIC REGULAR ErP Series Installation, Commissioning And Servicing Instructions page 40

SERVICING AND SPARES
Fig. 71 Sensors
40
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.
3.
Fig. 72 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
▶ Fill the condensate trap with approximately 1/4 litre of water and
4.
5.
Fig. 73 Siphon removal
6 720 812 174-20.1O
The valve will require setting, follow procedure "Setting
the gas/air ratio" in the gas conversion section.
7.
A
C
clear.
refit in reverse order.
2.
1.
B
6 720 812 174-25.1O
6 720 812 174-24.1O
6 720 815 723 (2015/05)