Primary Circuit Pressure Switch; Function; Removal - Biasi RINNOVA ADAPTIVE M300V.2025 SM Service Manual

12 PRIMARY CIRCUIT PRESSURE SWITCH

12 .1 Function

The Primary circuit pressure switch ("A" in Figure 12.1) function
is to check the presence of water in the primary hydraulic circuit
and that the pressure is above the minimum.
Figure 12 .1
This device is connected to the main electronic control p.c.b. and
if, it does not activate the control board will indicate that a fault
condition (see section "4.1 Display diagnostic" on page 13 of
this manual) has occurred.
PRIMARY CIRCUIT FLOW SWITCH
A

12 .2 Removal

Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove the front and right hand side panels of the case, turn
off the flow and return isolation valves and empty the primary
circuit.
2 Remove the fixing spring "C" (Figure 12.2) and remove the
primary circuit pressure switch "D".
3 Disconnect the connector "B" (Figure 12.2).
B
D
C
Figure 12 .2
4 Reassemble the primary circuit pressure switch in reverse
order of removal.
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 .
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