Alpha CD24C Installation And Servicing Instructions page 26

8.12 VIEWING WINDOW - Fig. 26
1. Gain access behind the casing as in Section 8.1.
2. Remove the rubber window frame and remove the damaged glass.
3. Re-assemble in reverse order with a new glass. Ensure the rubber frame is located correctly in the front panel.
8.13 TERMINAL BLOCK FUSE - Refer to Fig. 20
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 pins.
8.14 PCB - Fig. 30
1. Gain access behind the control panel as described in Section 8.1.
2. Disconnect all the wiring connectors from the PCB.
3. Remove the five fixing screws and carefully withdraw the board from the switch spindles.
4. Re-assemble in reverse order. Refer to the wiring diagram in Section 9.1 for connections.
5. Light the boiler and adjust the PCB as described in the instructions supplied with the replacement PCB.
8.15 DHW FLOW SWITCH - Fig. 31
1. Gain access behind the casing as described in Section 8.1.
2. Remove the switch from the diverter valve by pulling or prising it upwards from the valve body. Disconnect the inline wiring
connector. Re-assemble in reverse order with a new switch. Ensure that the switch is located correctly.
8.16 CLOCK (if fitted) - Refer to Fig. 21
Note: For replacement only use an Alpha single channel clock. Do not fit a two channel clock.
1. Gain access behind the control panel as described in Section 8.1.
2. Remove the two screws securing the clock cover at the rear of the control panel.
3. Disconnect the wiring from the clock.
4. Remove the clock retaining screws and withdraw the clock from the control panel.
5. Fit the new clock, and connect the wires as follows:-
Blue to terminal 1, Brown to terminal 2 and Red wires to terminals 3 and 4, (or as per the instructions supplied with the clock).
6. Re-assemble in reverse order. Refer to the User's instructions and the boiler's control cover to set the clock.
26 Alpha CD24C/32C - Component Replacement
Fig. 30 Fig. 31