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6
D .H .W . HEAT EXCHANGER
6 .1 Function
The D.H.W. heat exchanger "A" in Figure 6.1 and Figure 6.3 al-
lows the instantaneous transfer of heat from the primary hydrau-
lic circuit to the water destined for D.H.W. use.
Figure 6 .1
The schematic structure is shown in Figure 6.2.
Primary hydraulic circuit
Domestic hot water circuit
Figure 6 .2
6 .2 Removal
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove the panels of the case.
2 Empty the primary circuit and the D.H.W. circuit of the boiler.
3 Remove the control panel following the instructions from 4 in
section 2.3.
4 Remove main electronic p.c.b. box following the instructions
from 5 in section 2.4.
5 Completely unscrew the Allen key screws "B" in Figure 6.3
which hold the exchanger to the plastic groups.
- 16 -
D.H.W. HEAT EXCHANGER
A
Figure 6 .3
6 Move the exchanger towards the rear of the boiler and extract
Reassemble the D.H.W. heat exchanger carrying out the remov-
al operations in the reverse order.
Figure 6 .4
B
it to the left.
Warning: to lubricate the O-ring gaskets exclusively
use a silicone base grease compatible to be in con-
tact with foods and approved by the local water Au-
thorities .
Warning: When reassembling the exchanger be
sure to put the off center location/securing pin indi-
cated in Figure 6 .4 towards the left side of the boiler .
A
B
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