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

Страница: 14 / 52

12
6 D.h.w. heat exchanger
6.1 Function
The d.h.w heat exchanger
A
in Fig. 6.1 and Fig. 6.3 al-
lows the instantaneous transfer of heat from the primary
hydraulic circuit to the water destined for d.h.w use.
A
Fig. 6.1
The schematic structure is shown in Fig. 6.2.
Primary hydraulic circuit
Domestic hot water circuit
Fig. 6.2
6.2 Removal
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
1 Remove the front and right hand side panels of
the case.
2 Empty the primary circuit and the d.h.w circuit of
the boiler.
3 Completely unscrew the Allen key screws
B
(Fig. 6.3) which hold the exchanger to the brass
group.
4 Remove the electric actuator following the in-
structions in section 8.3.
B
A
Fig. 6.3
5 Remove the pump following the instructions in
section 7.3.
C
A
Fig. 6.4
6 Completely unscrew the Allen key screws C
(Fig. 6.4) which hold the exchanger to the plastic
groups.
7 Move the exchanger towards the rear of the boiler
and extract it.
Reassemble the d.h.w. heat exchanger carrying out the
removal operations in the reverse order.
Warning: to lubricate the O--ring gaskets
exclusively use a silicone base grease
compatible to be in contact with foods and
approved by the local water Authorities.
Attention. When reassembling the exchanger be
sure to put the off centre location/securing pin indi-
cated in Fig. 6.5 towards the left side of the boiler.
Fig. 6.5