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17.5
Removal of the Air pressure switch
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1
Remove all the case panels and the sealed
chamber lid.
2
Disconnect the wires from the Air pressure
switch.
3
Remove the pipe from the Air pressure switch.
4
Unscrew the screws which hold the Air pressure
switch to the frame.
5
Assemble the Air pressure switch carrying out the
removal operations in reverse sequence.
Warning: to correctly connect the Air pressure
switch, refer to Fig. 72 and Fig. 68a or Fig. 68b for
the correct wiring.
Warning: After cleaning or replacement as
detailed above refer to section Combustion
analysis check in the chapter Maintenance of
the installation instructions manual.
Fan and Air pressure switch
37
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