Technical data

8.3 PILOT COMPONENTS (Alpha 240XP only) - Fig. 19

Gain access as in section 8.1.

Disconnect the thermocouple and pilot supply from the gas valve. Remove the pilot assembly from the burner.

1. Thermocouple

Disconnect from the pilot burner and withdraw through the grommet. Carefully bend new thermocouple to match the old

one, pass it through the seal and connect to the pilot burner.

2. Electrode

Disconnect the lead from the electrode, unscrew the nut and withdraw the electrode. It will be necessary to remove the

thermocouple first. Fit the new electrode and check the spark gap (see Fig. 19).

3. Pilot injector

Disconnect the pilot supply and remove the injector. Fit the new injector over the pilot supply as shown in Fig. 19, and

reconnect it to the pilot burner.

Re-assemble

1. Replace the pilot assembly and pilot shield then reconnect the pilot supply and thermocouple to the gas valve. Ensure that

the overheat thermostat connection is in position in the gas valve before securing the thermocouple.

2. Light the boiler and test the pilot supply for gas soundness. (Refer to Commissioning, section 5.4).

3. Complete re-assembly as described in Routine Servicing, section 7.4 paragraphs 5 to 9.

Alpha 240XP and 240XE - Component Replacement

Pilot burner

Thermocouple

Electrode

Pilot injector

Pilot shield

5 mm

Spark gap

Fig. 19

8.4 IGNITION LEAD (Alpha 240XP only) - Refer to Fig. 28

1. Gain access as in section 8.1.

2. Disconnect the lead from the electrode.

3. Disconnect the lead from the ignition PCB, noting its position (see Fig. 28).

4. Fit the new lead ensuring it passes through the grommets in the control panel cover and base of the combustion chamber.

5. Re-assemble in reverse order.

8.5 IGNITION ELECTRODE LEAD (Alpha 240XE only) - Refer to Fig. 27

1. Gain access as in section 8.1.

2. Disconnect the lead from the electrodes.

3. Disconnect the lead from the ignition PCB, noting its position (see Fig. 27).

4. Fit the new lead ensuring it passes through the grommets in the control panel cover and base of the combustion chamber.

5. Re-assemble in reverse order.