31
SECTION 3 - SERVICING
3.29 FLOW THERMISTOR REPLACEMENT
1.
Refer to Section 3.8.
2.
Drain the boiler. Refer to Section 3.19.
3.
Turn the housing anti clockwise and pull
forward to remove the cartridge.
4.
Using a pair of pliers, pull out the plastic
filter/flow regulator.
5.
Clean or replace filter as necessary.
6.
Reassemble in reverse order.
7.
Refill the boiler.
8.
Check operation of the boiler.
3
4
1.
Refer to Section 3.8.
2.
Drain down the boiler. Refer to Section 3.19.
3.
Unplug the electrical lead.
4.
Unscrew the thermistor (to facilitate removal a 13mm
deep socket spanner should be used).
5.
Fit the new thermistor using the sealing washer provided.
6.
Reassemble in the reverse order.
7.
Refill the boiler and add the correct volume of anti-freeze.
8.
Check the operation of the boiler.
3.28
DHW FILTER & DHW FLOW REGULATOR CLEANING/REPLACEMENT
4
3
3.30 RETURN THERMISTOR REPLACEMENT
1.
Refer to Section 3.8.
2.
Unclip the return thermistor from the return pipe and withdraw it from the boiler.
3.
Disconnect the electrical lead from the thermistor.
4.
Reconnect the electrical lead to the new thermistor and reassemble in reverse
order, ensuring that the thermistor is securely fitted to the pipe on the thermistor
locator tab as shown.
5.
Check that the boiler operates in both DHW & CH Mode.
2
Thermistor Locator Tab
(with thermistor fitted)
4
