Inspection And Removal Of The Venturi; Removal Of The Air Pressure Switch - Biasi RIVA COMPACT M90E.24S Service Manual

Fan
4 Unscrew the screws D and remove the clamp E
(Fig. 4).
Fig. 4
Remove the three screws F (Fig. 1) securing the
5
Fan to the flue hood and remove the fan.
6 Assemble the fan carrying out the removal oper-
ations in reverse sequence.
Warning: to correctly connect the venturi device to
the Air pressure switch, refer to Fig. 5.
---
Fig. 5
Warning: After cleaning or replacement as
detailed above refer to section Combustion
analysis check in the chapter Maintenance of
the installation instructions manual.
16.4

Inspection and removal of the venturi

device
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1 Remove the fan (section 16.3).
2 Remove the venturi device by unscrewing the
screw G.
32
E
D
+
3 Inspect the venturi device A and the connection
pipe H. Ensure they are clean.
4 Re---assemble the parts in reverse order of re-
moval.
Warning: After cleaning or replacement as
detailed above refer to section Combustion
analysis check in the chapter Maintenance of
the installation instructions manual.
Fig. 6
16.5

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. 5 and Fig. 2a or Fig. 2b 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.
A
H
G