19
Fig. 18
7.2
PREPARE FOR SERVICING - Fig. 18
1.
Ensure the electrical supply is isolated and the gas supply is off.
2.
Unscrew the two screws securing the control panel and lower the panel.
3.
Lift the case front panel upwards slightly and pull it forwards to remove it from the boiler.
4.
Remove the four screws securing the room sealed chamber panel and remove the panel, taking care not to damage the seal.
5.
Remove the four screws securing the combustion chamber front cover and remove the cover.
6.
Disconnect the electrode lead from the electrode and the in-line connector to the flame sensing electrode.
7.
Remove the four screws securing the burner and withdraw it out of the boiler. Take care not to damage the side insulation
panels.
7.3
CLEANING THE BOILER
1.
Remove any deposits from heat exchanger using a suitable soft brush. Do not use a brush with metallic bristles.
2.
Check the condition of the combustion chamber insulation panels. Any damaged panels must be replaced. (Refer to
Component Replacement, section 8.23).
3.
Check the condition of the burner injectors on the manifold, carefully clean them with a soft brush if necessary.
Do not use a brush with metallic bristles as this might damage the injectors.
4.
Remove any fallen deposits from the bottom of the inner case.
5.
Unscrew and replace any injector that appears damaged.
6.
Clean the top of the burner with a soft brush and check that the flame ports are clear. Blockages may be removed with a
stiffer brush. Tap the burner, open end down, to remove any deposits from inside.
7.
Check the condition of the electrodes.
9.
Check the spark gap, positioning and height of the electrodes (see Fig. 19).
10. Check that the fan impeller is clean and free to rotate.
7.4
RE-ASSEMBLE THE BOILER
1.
Replace the burner, ensuring it is located correctly and secure it in position using the four screws previously removed.
2.
Replace the combustion chamber front cover, ensuring it is correctly located.
3.
Ensure the electrode lead is connected and the seals are in position in the bottom of the inner case.
4.
Test the connections for gas soundness and check the burner pressures. (Refer to Commissioning, sections 5.4 and 5.5).
5.
Ensure that the room sealed chamber panel seal is intact and in position, replace the panel ensuring it has been located
correctly (especially on the sides) and secure it in position with the screws previously removed.
6.
Place the front case panel in position as shown in Fig. 18 and secure in position.
7.
Raise the control panel and secure in position with the two screws provided.
8.
Check the operation of the boiler. (Refer to Boiler Operation, section 6).
9.
Return all controls to their original settings.
Alpha C23/27 - Routine Servicing
Room sealed chamber
panel screws
Combustion chamber
front cover
Ignition electrode (front)
Flame sensing electrode (rear)
Содержание Alpha C23
Страница 27: ...27 9 1 ILLUSTRATED WIRING DIAGRAM Alpha C23 27 Wiring Diagrams 9 WIRING DIAGRAMS ...
Страница 28: ...28 Alpha C23 27 Wiring Diagrams 9 2 FUNCTIONAL FLOW WIRING DIAGRAM ...
Страница 30: ...30 Alpha C23 27 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence ...
Страница 31: ...31 Alpha C23 27 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F ...
Страница 32: ...32 Alpha C23 27 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L ...
Страница 35: ...35 Alpha C23 27 ...
