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57 PUMP HEAD REPLACEMENT
1. Refer to Frame 41.
2. Drain the boiler. Refer to Frame 53.
3. Disconnect the two electrical leads 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. Refill the boiler. Refer to Frame 23.
9. Check operation of the boiler. Refer to Frames 30 & 31.
58 CH WATER PRESSURE SWITCH REPLACEMENT
1. Refer to Frame 41.
2. Drain the boiler. Refer to frame 53.
3. Pull off the two electrical connections.
4. Using a suitable tool, pull out the metal
retaining clip.
5. Carefully withdraw the pressure switch.
6. Fit the new pressure switch and re-assemble
in reverse order.
7. Refill the boiler.
8. Check operation of the boiler. Refer to Frames
30 & 31.
59 CONTROL / NO FLOW THERMISTOR REPLACEMENT
1. Refer to Frame 41.
2. Drain down the boiler. Refer to Frame 53.
3. Unplug the electrical lead.
4. Unscrew the thermistor (to facilitate removal a
13mm 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. Refer to Frame 23.
8. Check the operation of the boiler. Refer to
Frames 30 & 31.
Installation and Servicing
SERVICING
4
4
5
3
3
4
3
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