40
xtra
-
Installation & Servicing
SERVICING
56 WATER PRESSURE SWITCH REPLACEMENT
1.
Refer to Frame 42.
2.
Remove the jacket front, control fascia, top
and right side panels. (Refer to Frame 45).
3.
Isolate water circuit and drain boiler.
4.
Pull off the electrical connections (no
polarity) from the pressure switch.
5.
Unscrew the water pressure switch
6.
Fit the new water pressure switch.
7.
Re-assemble in reverse order.
8.
Re-fill the system ensuring all the air in the
heat exchanger is vented.
9.
Refer to frame 42 for final safety checks.
4
A
57 FLOW / RETURN / HE BLOCK / FLUE THERMISTOR REPLACEMENT
1.
Refer to Frame 42
2.
Remove the jacket panels as appropriate.
(Refer to Frame 45).
3.
Isolate water circuit and drain boiler.
4.
Pull off the electrical connections from the
thermistor.
5.
Unscrew the thermistor.
6.
Fit the new thermistor with built in ‘O‘ ring
seal. Do not overtighten.
7.
Re-assemble in reverse order.
8.
Refill the system ensuring all the air in the
heat exchanger is vented.
9.
Refer to Frame 42 for final safety checks.
1.
Refer to Frame 42.
2.
Remove the jacket front, inner front,
controls fascia and top panels. Refer
to Frame 45.
3.
Disconnect the transformer
connection from the boiler control
module. (Refer to 'A' in Frame 59).
4.
Remove the 2 screws on the left side
of the transformer whilst supporting
its weight.
5.
Disengage the transformer from the 2
retaining lugs by moving it to the left.
Remove from boiler.
6.
Re-assemble in reverse order.
7.
Refer to Frame 42 for final safety
checks.
58 TRANSFORMER REPLACEMENT
4
4
5
SER
VICING
