Removal Of The Fan Group - Biasi RIVA ADVANCE HE M110.24SM/C Service Manual

17 Fan and Air box
17.1 Function
The function of the Fan A (Fig. 17.1) is to force the mix-
ture of air and gas into the burner.
The function of the Air box B is to mix the gas and the
air in the right proportion.
The flow rate of the air---gas mixture and consequently
the input power of the boiler is proportional to the speed
of the fan that is controlled by the electronic control
p.c.b.
A
B
Fig. 17.1
17.2

Removal of the fan group

Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1 Turn off the gas supply.
2 Remove all the case panels and the sealed
chamber lid (see section 2).
F
G
Fig. 17.2
Disconnect the rubber pipe C (Fig. 17.2).
3
34
4
5
6
7
8
Fig. 17.3
C
E
Fig. 17.4
9
10
D
Completely loosen the gas connection D
(Fig. 17.2).
Loosen without removing the screw E.
Remove the screws F and the air box G. Leave the
air box with the air hose clamped to the water
pipe.
Disconnect the fan connector H by pressing the
plastic hook placed on the rear side of the con-
nector (Fig. 17.3).
Unscrew the screws I (Fig. 17.4) .
H
Remove the fan group J by sliding it forwards.
Assemble the fan group carrying out the removal
operations in reverse sequence.
Warning: After cleaning or replacement as
detailed above, if it deemed necessary to
undertake a combustion analysis, refer to
I
J