SERVICING
Mini
Installation & Servicing
45
62 DHW HEAT EXCHANGER
REPLACEMENT
Mini C only
1 Disconnect the electrical supply.
2 Remove outer casing (refer to frame 36).
3 Close the isolating cocks of the CH circuit and DHW
supply 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 Release the pressure of the DHW circuit by opening a hot
tap.
6 Remove the diverter valve actuator (see frame 63).
7 Completely unscrew the two Allen key screws A which
hold the exchanger to the brass groups.
A
8 Move the exchanger towards the rear of the boiler and
extract it.
9 Re---assemble in the reverse order.
Attention. When reassembling the exchanger be sure to
put the off center location/securing pin indicated towards
the left side of the boiler.
63 DIVERTER VALVE ACTUATOR
REPLACEMENT
Mini C only
1 Disconnect the electrical supply.
2 Remove front casing panel (refer to frame 36).
3 Disconnect the connectors A.
4 Remove the fixing spring B and remove the actuator C.
Re---assemble in reverse order.
When reassembling the actuator, refer to the wiring diagram
in frame 22 for the correct wiring connection.
B
A
C
SER
VI
CI
N
G
