50
Installation and Servicing
Section 3 - Servicing
SER
VICING
3.24 REPLACEMENT OF DHW THERMISTOR
1. Isolate the DHW system.
2. Remove the retaining clip and extract the thermistor.
Be prepared for some water release.
3. Disconnect the wiring harness.
Refer to Section
3.2
4. Fit the replacement thermistor and reassemble.
5. Re-establish the DHW supply, turn on a hotwater tap
checking for leaks.
Refer to Section
3.2
Refer to Section
3.3
Refer to Section
3.18
Refer to Section
2.18
SCAN
for video
1. Drain the boiler.
2. Remove condensate trap.
3. Remove the 2 hex screws securing the plate heat
exchanger to the composite housings.
4. Manoeuvre the plate heat exchanger out of the top LH
or centre of the controls area. Be aware of any water
spillage.
3.25 DHW PLATE HEAT EXCHANGER REPLACEMENT
5. Fit the new plate heat exchanger, using the new
‘O’ rings supplied.
Check that the depressions are on the bottom prior to
fitting.
6. Reassemble.
7. Refill the boiler.
3
DHW
Thermistor
position
2
