Technical data

26
8.15 IGNITION MICROSWITCH ASSEMBLY (Alpha 240XP only) - Fig. 26
1. Gain access as in section 8.1.
2. Remove the screw securing the light grey cover
around the gas control knob.
3. Remove the screw securing the microswitch
assembly to the valve (access from beneath the
boiler).
4. Remove the 2-pin connector from the ignition PCB
and remove the microswitch complete with cable.
5. Re-assemble in reverse order.
8.16 VIEWING WINDOW
1. Gain access as in section 8.1.
2. Remove the two screws securing the window
frame and remove the damaged glass and gasket.
3. Re-assemble in reverse order with a new glass
and gasket. Ensure the gasket is next to the inner
case front panel.
8.17 INTERNAL FUSE - Refer to Fig. 14
The fuse is located in the boiler terminal block.
1. Gain access as described in Installation, section
4.8.
2. Lift out the fuse holder and remove the fuse. Fit a fast blow 2 A fuse as a replacement, ensuring that the holder snaps into position.
3. Re-assemble in reverse order, ensuring the terminal block is located correctly on the plastic pin.
8.18 IGNITION PCB (Alpha 240XE only) - Refer to Fig. 27
1. Gain access as described in section 8.1.
2. Disconnect the wiring connectors, then remove the four fixing screws.
3. Connect the wiring to the new PCB and re-assemble in reverse order.
8.19 RELAY PCB - Refer to Fig. 27 or 28
1. Gain access as described in section 8.1.
2. Disconnect the wiring connector from the PCB.
3. Remove the fixing screw and remove the board.
4. Re-assemble in reverse order.
8.20 RESET SWITCH (Alpha 240XE only) - Refer to Fig. 27
1. Gain access as described in section 8.1.
2. Disconnect the wiring from the switch.
3. Depress the switch retaining lugs and withdraw the switch from the front of the control panel.
4. Re-assemble in reverse order, ensuring that the wiring is connected as follows:-
White to terminals 1 and 3, Black to terminal 2.
Alpha 240XP and 240XE - Component Replacement
Ignition microswitch
assembly
Fig. 26
Microswitch assy. screw
Grey cover screw