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16
BY-PASS VALVE
16 .1 Function
The By-pass valve A in Figure 16.1 is located between the c.h.
water flow and return and its function is that of guaranteeing a
minimum flow across the primary heat exchanger if the circula-
tion across the c.h. system is completely closed.
The By-pass valve is inside of the diverter group.
Figure 16 .1
16 .2 Removal
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove all the case panels.
2 Empty the primary circuit of the boiler.
3 Remove the locking plate B and pull up the by-pass valve A
(Figure 16.3).
BY-PASS VALVE
A
B
Figure 16 .2
4 Reassemble the by-pass valve as illustrated in Figure 16.2
reversing the order of removal.
A
Figure 16 .3
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 .
Attention: when reassembling the By-pass valve be
sure that it is correctly oriented by matching the ref-
erence C with the notch D of the water group Figure
16 .3 .
A
C
D
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