25
Alpha CB50 - Component Replacement
Fig. 24
8.16 CLOCK (if fitted) - Refer to Fig. 17
1.
Gain access as described in section 8.1.
2.
Remove the two screws securing the clock cover at the rear of the control panel and disconnect the wiring from the clock.
3.
Remove the clock retaining screws and withdraw the clock from the control panel.
4.
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).
5.
Re-assemble in reverse order. Refer to the User's instructions and the boiler's control cover to set the clock.
8.17 MAIN HEAT EXCHANGER
1.
Gain access as described in section 8.1.
2.
Drain the boiler heating circuit as described in section 8.2.
3.
Remove the four screws securing the combustion chamber front cover and remove the lower and upper sections.
4.
Remove the two pipe clips and loosen the unions of the flow/return pipes. Remove the left side pipe.
5.
Remove the primary temperature sensor and overheat thermostat from the heat exchanger and disconnect the fan
pressure sensing tube.
5.
Remove the four screws securing the flue hood and lift out the flue hood.
6.
Remove the heat exchanger by pulling it towards the front withdrawing the right side pipe through the room sealed
chamber side panel, being careful not to damage the combustion chamber insulation. Remove the pipe from the heat
exchanger and fit it to the new one.
7.
Fit the new heat exchanger, using new 'O' rings. Lubricating the 'O' rings with a soap solution will aid assembly. Ensure
the heat exchanger is correctly located. Take care not to damage the combustion chamber insulation sides.
8.
Re-assemble in reverse order.
9.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
8.18 COMBUSTION CHAMBER INSULATION
1.
Gain access as described in section 8.1.
2.
Remove the four screws securing the combustion chamber front cover and remove the lower and upper sections.
3.
Remove the retaining screw and slide out the insulation front panel from the front cover.
4.
To replace the rear and side panels, remove the heat exchanger as described in section 8.17 and slide out the insulation panels.
5.
Fit a new panel and re-assemble in reverse order.
6.
Refill and pressurise the system. (Refer to Commissioning, section 5.1).
Main PCB
R/H ignition lead
L/H ignition lead
Diverter valve PCB
Pressure gauge
Содержание Alpha CB50 Boiler
Страница 29: ...29 9 WIRING DIAGRAMS 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Страница 30: ...30 9 2 FUNCTIONAL FLOW WIRING DIAGRAM Alpha CB50 Wiring Diagrams ...
Страница 32: ...32 Alpha CB50 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence ...
Страница 33: ...33 Alpha CB50 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F ...
Страница 34: ...34 Alpha CB50 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L ...
