Biasi RIVA ADVANCE HE M110B.24SM/C, Руководство по обслуживанию

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10
5 Condensing heat exchanger
5.1 Function
The Condensing heat exchanger A in Fig. 5.1 has the
function of transferring heat produced from combus-
tion of the gas and from the flue exhausted gas to the
water circulating in it.
A
B
C
Fig. 5.1
By reducing the combustion products temperature, the
latent heat of the vapour is transferred to the water cir-
cuit, allowing an extra gain of useful heat.
The condensed vapour is then drained through the
condensate trap B and the draining pipe C .
5.2 Removal
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1 Disconnect the flue system from the boiler.
2 Remove the fan group (rubber pipe, gas pipe) fol-
lowing the instructions from 1 to 6 in section 17.2.
3 Disconnect the detection electrode connector
D
,
the ignition electrodes connector E and the earth
wire
F
.
4 Disconnect the fan connector G by pressing the
plastic hook placed on the side of the connector
(Fig. 5.2).
5 Unscrew the nuts
H
(Fig. 5.2).
6 Remove the fan---burner group I .
7 Empty the primary circuit of the boiler.
8 Remove the clips J (Fig. 5.2).
9 Loosen the connection
K
and slightly move the
pipe L upwards, turn it towards left (Fig. 5.2) and
then move the pipe downwards freeing it from the
Condensing heat exchanger.
H
I
F E
I
J
G
D
K L M N
Fig. 5.2
10 Loosen the connection M and slightly move the
pipe N upwards, turn it towards left (Fig. 5.2) and
then move the pipe downwards freeing it from the
Condensing heat exchanger.
Q
O
P
R
Fig. 5.3