40
SERVICING
i
combi
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Installation and Servicing
46 spaRK gENERaTOR REpLaCEMENT
1.
Refer to Frame 40.
2.
Disconnect the leads from the spark
generator.
3.
Remove the M5 screws securing the
spark generator to the boiler chassis.
4.
Fit the new spark generator and re-
assemble in reverse order ensuring
the two earth leads are correctly
replaced.
5.
Check operation of the boiler. Refer
to Frames 29 & 30.
Spark Generator
3
3
2
2
4
47 gas CONTROL VaLVE REpLaCEMENT
1.
Refer to Frame 40.
2.
Unplug the electrical lead connection from the
gas control valve and disconnect the earth wire.
3.
Undo the union nut on the outlet of the gas
control valve.
4.
Undo the gas inlet pipe union at the inlet to the
gas control valve.
5.
Loosen the back nut retaining the valve to the
bracket and withdraw the valve forwards.
6.
Fit the new gas control valve ensuring the two
sealing washers are in place and reconnect gas
and electrical connections.
7.
Check operation of the boiler. Refer to Frames
29 & 30.
2
4
5
3
sER
VICIN
g
