SERVICING
64
GAS VALVE REPLACEMENT
1. Refer to Frame 55.
2. Remove the upper front panel (Refer to frame 57).
3. Remove the fan and gas assembly (Refer to frame 58).
4. Remove the 3 screws holding the gas valve to the venturi
(40,60 & 80 only).
5. Remove the venturi from the fan to access the gas valve
xing screws (100/120 only Refer to frame 63).
6. Remvove the four screws retaining the gas valve.
7. Remove the venturi from the mixture chamber before
removing the gas valve (as in (4) - 150 only).
8. Remove the 4 screws retaining the inlet ange to gas valve &
transfer to new valve (100/120 only).
9. Fit new gas valve to venturi using the new seal provided,
ensure gas injector is tted correctly.
10. Reassemble in reverse order replacing all gaskets.
11. Check the operation of the boiler (Refer to frame 55).
40kW & 60kW
80kW
100kW
120kW
150kW
7
7
4
6
4
6
8
8
8
8
8
176272
176272
176272
176272
176273
176273
176273
176274
176274
176360
176360
176361
176361
176362
176362
175232
174381
176362
176313
176313
176313
176313
176313
176313
176358
176358
176313
176369
176559
176370
176560
176371
176561
176373
176373
176371
Model
40
40P
60
60P
80
80P
100
120
150
Fan Venturi
Gas Management Assembly Part No’s
Valve Injector