Keston System s30, Installation And Servicing Instructions

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49
Installation and Servicing
SECTION 3 - SERVICING
3.23 PUMP HEAD REPLACEMENT
3.24 CH WATER PRESSURE SWITCH REPLACEMENT
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 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 Section 2.13.
8.
Check the operation of the boiler. Refer to
Sections 2.22 & 2.23.
3.25 CONTROL / NO FLOW THERMISTOR REPLACEMENT
4
3
1. Refer to Section 3.8.
2. Drain the boiler. Refer to Section 3.19.
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 Section 2.13.
9. Check operation of the boiler. Refer to Sections 2.22 & 2.23.
3
4
1. Refer to Section 3.8.
2. Drain the boiler. Refer to Section 3.19.
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
Sections 2.22 & 2.23.
3
4
5
SER
VICING