Three Way Diverter Valve; Function; Checks; Removal Of The Electric Actuator - Biasi RINNOVA ADAPTIVE M300V.2025 SM Service Manual

8

THREE WAY DIVERTER VALVE

8 .1 Function

The diverter valve "A" (Figure 8.1) has the function of modifying
the hydraulic circuit of the boiler by means of an electric com-
mand given by the electronic control p.c.b. in order to send the
water that exits the primary heat exchanger towards the C.H.
system or towards the D.H.W. heat exchanger.
Figure 8 .1

8 .2 Checks

Warning: check the electrical continuity .
Figure 8.2 indicates the relationship between the electric com-
mand coming from the electronic control p.c.b. and the position
of the actuator "B" (brass spindle) when the boiler operates in
D .H .W . mode.
Figure 8.3 indicates the relationship between the electric com-
mand coming from the electronic control p.c.b. and the position
of the actuator "B" (brass spindle) when the boiler operates in
C .H . mode.
In both figures the relationship between the position of the actua-
tor and the resistance of the motor windings (the motor must be
disconnected from the wiring before undertaking any resistance
tests) is also given.
THREE WAY DIVERTER VALVE
A
B
Spindle visible
Figure 8 .2 D.H.W. mode
B
Spindle not visible
Figure 8 .3 C.H. mode

8 .3 Removal of the electric actuator

Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove the front case panel.
2 Disconnect the connectors "C" (Figure 8.4).
3 Remove the fixing spring "D" and remove the actuator E.
Reassemble the actuator carrying out the removal operations
in the reverse order.
When reassembling the actuator, refer to Figure 8.3 or to the
wiring diagram in section "3 Diagrams" on page 8 for the
correct wiring connection.
1 2 3
9,4 Kohm
Open circuit
bk bu bn
bk = black
bu = blue
bn = brown
1 2 3
Open circuit
9,4 Kohm
bk bu bn
bk = black
bu = blue
bn = brown
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