26
Fig. 30
8.12 VIEWING WINDOW - Fig. 25
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. 29
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 CLOCK (if fitted) - Refer to Fig. 21
Note:
For replacement only use an Alpha two channel clock.
Do not fit a single 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 two channel clock, and connect the wires as follows:-
Brown wire to terminal 1, Blue wire to terminal 2, Black wire to terminal 3, Grey wire to terminal 4 and White wire to
terminal 5, (or as per the instructions supplied with the clock).
6.
Re-assemble in reverse order. Refer to the instructions supplied with the clock and set the clock to the correct time. Leave
the instructions with the User.
8.16 PRIMARY HEAT EXCHANGER - See Fig. 30
1.
Gain access behind the room sealed chamber panel as described in
Section 8.1 and drain the boiler heating circuit as described in
Sections 8.1 and 8.2.
2.
Disconnect the gas inlet union from the combustion chamber front.
3.
Remove the two screws and six nuts and washers securing the
combustion chamber front burner assembly and remove.
4.
Remove the overheat thermostat (Section 8.9), flue thermostat (Section
8.10) and the primary temperature sensor (Section 8.19).
5.
Disconnect the condensate drain union.
6.
Remove the two clips from the heat exchanger flow and return pipes
and disconnect the unions at the pump and diverter valve (if
applicable).
7.
Remove the four screws securing the heat exchanger retaining
brackets.
8.
Lift up the heat exchanger off the pipes and remove it by carefully
withdrawing it out of the boiler.
9.
Re-assemble in reverse order, ensuring that new seals are used.
Lubricating the seals with the grease supplied will aid assembly.
10. Refill and pressurise the system. (Refer to Commissioning, Section 5.1).
Alpha CD18S/24S/30S - Component Replacement
Fig. 29
Содержание Alpha CD18S
Страница 11: ...11 Alpha CD18S 24S 30S General Boiler Information Fig 9 External soakaway Fig 8 External gully ...
Страница 29: ...29 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CD18S 24S 30S Wiring Diagrams 9 WIRING DIAGRAMS ...
Страница 30: ...30 Alpha CD18S 24S 30S Wiring Diagrams 9 2 FUNCTIONAL FLOW WIRING DIAGRAM ...
Страница 32: ...32 10 2 FAULT FINDING SOLUTIONS A to E Alpha CD18S 24S 30S Fault Finding ...
Страница 33: ...33 Alpha CD18S 24S 30S Fault Finding 10 3 FAULT FINDING SOLUTIONS F to K ...
