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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 allows
the instantaneous transfer of heat from the primary hydraulic cir-
cuit 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 Remove the pump following the instructions in section 7.2.
6 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
figure 6 .3
a
7 Move the exchanger towards the rear of the boiler and extract
Reassemble the d.h.w. heat exchanger carrying out the removal
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 indicated
in figure 6 .4 towards the left side of the boiler .
a
B
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