62
pUMp hEaD REpLaCEMENT
1. Refer to Frame 40.
2. Drain the boiler. Refer to Frame 55.
3. Disconnect the electrical lead from the pump.
4. Remove the 4 Allen screws retaining the pump head.
5. Remove the pump head.
6. Fit the new pump head.
7. Reassemble in reverse order.
8. Rell the boiler.
9. Check operation of the boiler. Refer to Frames 29 & 30.
5
63
Ch Wa TER pREssURE sENsOR REpLaCEMENT
1. Refer to Frame 40.
2. Drain the boiler. Refer to frame 55.
3. Remove condensate trap/siphon. Refer to
Frame 50.
4. Using a suitable tool pull out the retaining clip.
5. Pull the pressure sensor upwards to remove.
6. Unplug the electrical connection and transfer
to the new pressure sensor.
7. Push the new pressure sensor onto the rear
pump housing and t retaining clip.
8. Reassemble in reverse order.
9. Rell the boiler.
10. Check Operation of the boiler. Refer to
Frames 29 & 30.
6
4
64
DhW FILTER & DhW FLOW REgULa TOR CLEaNINg / REpLaCEMENT
DhW Filter
1. Refer to Frame 40.
2. Isolate the mains cold water supply to the boiler.
3. Drain the boiler DHW circuit. Refer to frame 55.
4. Remove DHW ow turbine cartridge. Refer to Frame 59.
5. Unscrew the ow regulator housing.
6. Remove the lter.
7. Clean or replace lter as necessary.
8. Reassemble in reverse order.
9. Rell the boiler.
10. Check Operation of the boiler. Refer to Frames 29 & 30.
DhW Flow Regulator
1. Refer to Frame 40.
2. Isolate the mains cold water supply to the boiler.
3. Drain the boiler DHW circuit. Refer to Frame 55.
4. Remove DHW ow turbine cartridge. Refer to Frame 59.
5. Unscrew the ow regulator housing.
6. Inspect the ow regulator for any blockage and remove if
necessary.
7. Reassemble in reverse order.
8. Rell the boiler.
9. Check Operation of the boiler. Refer to Frames 29 & 30.
3
4
6
5
sERVICINg
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