SERVICING
Mini
--- Installation & Servicing
42
57 CH FLOW SWITCH REPLACEMENT
1 Disconnect the electrical supply.
2 Remove the front casing panel.
3 Remove the fork A.
4 Open the box B and disconnect the switch.
B
A
5 Re---assemble in reverse order.
Refer to the following illustration for the correct wiring
connectors on the switch
N.O.
do not use
C
Looking through the switch box B it is possible to verify the
position of the spindle C
C
Boiler OFF
Pump operating
58 CH FLOW SWITCH MEMBRANE
REPLACEMENT
1 Disconnect the electrical supply.
2 Remove front casing panel (refer to frame 36).
3 Close off the isolating cocks of the CH circuit at the
bottom of the boiler.
4 Release system pressure by opening the main circuit
drainage cock.
Do not release CH pressure using the pressure relief
valve. It may cause debris within the system to foul
the valve.
5 Remove the CH circuit flow switch (see frame 57).
6 Unscrew the four screws A, open the hydraulic operator
and remove the membrane B.
7 Re---assemble in reverse order.
When assembling the membrane, ensure to place the
concave side of the membrane towards the actuator plate
C and locate the reference hole in the membrane over the
pressure transfer nipple D.
A
B
C
D
59 DHW FLOW SWITCH REPLACEMENT
Mini C only
1 Disconnect the electrical supply.
2 Remove the front panel of the case (refer to frame 36).
3 Disconnect the connector A and remove the sensor B by
pulling it towards the front of the boiler (the sensor is held
in place by means of a spring).
4 Replace the sensor and re---assemble in reverse order
A
B
SER
VI
CI
N
G
