45
Installation and Servicing
SECTION 3 - SERVICING
3.13 IGNITION ELECTRODE REPLACEMENT
1. Refer to Section 3.8.
2. Remove the burner. Refer to Section
3.11.
3. Unplug the ignition lead from the
electrode.
4. Remove the earth lead from the ignition
electrode.
5. Remove the 2 screws holding the
ignition electrode to the combustion
chamber.
6. Remove the electrode.
7. Fit the new ignition electrode, using
the new gasket supplied. Check
dimensions as shown.
8. Reassemble in reverse order.
9. Check the operation of the boiler. Refer
to Section 2.23 & 2.24.
3.12 RETURN THERMISTOR REPLACEMENT
1. Refer to Section 3.8.
2. Unclip the return thermistor from the return pipe and withdraw it from the
boiler.
3. Disconnect the electrical lead from the thermistor.
4. Reconnect the electrical lead to the new thermistor and reassemble in
reverse order, ensuring that the thermistor is securely tted to the pipe on the
thermistor locator tab as shown.
5. Check that the boiler operates in both DHW & CH Mode.
2
Ignition Electrode
Thermistor Locator Tab
(with thermistor tted)
4
SERVICING
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