46
Installation and Servicing
SECTION 3 - SERVICING
3.14 FLAME DETECTION ELECTRODE REPLACEMENT
3.15 SPARK GENERATOR REPLACEMENT
1. Refer to Section 3.8
2. Disconnect the leads from the spark generator.
3. Gently push down the generator to release the top clip
from the gas valve mounting bracket.
4. Lift the spark generator up and out of the bottom
retaining moulding.
5. Fit the new spark generator and re-assemble in reverse
order ensuring that the the earth lead is replaced.
6. Check that the boiler operates in both DHW & CH
modes.
Flame Detection Electrode
Spark Generator
12.5mm
Straight edge
1. Refer to Section 3.8.
2. Remove the burner. Refer to
Section 3.4.
3. Unplug the ame detection lead
from the electrode.
4. Remove the 2 screws retaining
the detection electrode.
5. Remove the electrode.
6. Fit the new ame detection
electrode, using the new gasket
supplied.
7. Reassemble in reverse order.
8. Check that the boiler operates in
both DHW & CH modes.
3.16 GAS CONTROL VALVE REPLACEMENT
1. Refer to Section 3.8.
2.
Unplug the electrical lead connection from the gas control valve.
3. Remove the outlet gas valve clip and slide the pipe upwards.
4. Undo the gas inlet pipe union at the inlet to the gas valve.
5. Undo the single screw xing the gas valve to the mounting
bracket and withdraw the valve forwards.
6. Fit the new gas control valve ensuring that the ‘o’ ring and
sealing washer are in place and reconnect gas and electrical
connections.
7. Check that the boiler operates in both DHW & CH modes.
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SERVICING
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