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SECTION 3 - SERVICING
3.25 DHW PLATE HEAT EXCHANGER REPLACEMENT
3.26 PUMP HEAD REPLACEMENT
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 and add the correct volume of anti-freeze.
9.
Check operation of the boiler.
3.27 CH WATER PRESSURE SWITCH REPLACEMENT
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 and add the
correct volume of anti-freeze.
8.
Check operation of the boiler.
3
1.
Refer to Section 3.8.
2.
Drain the boiler. Refer to Section 3.19.
3.
Remove the condensate siphon. Refer to Section 3.16.
4.
Remove the two plate heat exchanger fixing screws.
5.
Slide the plate heat exchanger to the left and push the plate
back to disengage.
6.
Remove the plate heat exchanger.
7.
Fit the new plate heat exchanger using the new ‘O’ rings
provided and re-assemble in reverse order.
Note.
Ensure dimples and “bottom” are lower most.
8.
Refill the boiler and add the correct volume of anti-freeze.
9.
Check operation of the boiler.
4
3
4
5
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