Filter
Top Products
SERVICING
mini HE --- Installation & Servicing 45
63 CH FLOW SWITCH REPLACEMENT
1 Disconnect the electrical supply .
2 Remove the front casing panel.
3RemovetheforkA.
4 Open the box B and disconnect the switc h.
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
64 CH FLOW SWITCH MEMBRANE
REPLACEMENT
1 Disconnect the electrical supply .
2 Remove front casing panel (refer to frame 42).
3 Close off the isolating cocks of the CH circuit at the
bottom of the boiler.
4 R elease 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 s witch (see frame 63).
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
SERVICING