30
SECTION 3 - SERVICING
3.26 DIVERTER VALVE BODY ASSEMBLY REPLACEMENT
T
o remove the valve body assembly:
1.
Refer to Frame 3.8.
2.
Drain the boiler. Refer to Frame 3.21.
3.
Remove the condensate trap/siphon. Refer to Frame 3.17.
4.
Remove the electrical plug. Refer to Frame 3.16.
5.
Place a flat bladed screwdriver in the diverter valve motor body
slot provided and ease out the motor Refer to Frame 3.16.
6.
Remove the return thermistor electrical connection. Refer to
Frame 3.32.
7.
Remove the pump electrical connection. Refer to Frame
3.25 no. 3.
8.
Remove DHW Turbine electrical connection. Refer to
Frame 3.22 no. 3.
9.
Remove the DHW plate heat exchanger (note orientation).
Refer to Frame 3.27.
10.
Undo the safety valve pipe compression fitting. See No.5
Frame 3.24.
11.
Remove the compression fitting above the pump and rotate
the pipe.
12.
If required remove expansion vessel connection hose.
Refer to Frame 3.34, no. 8.
13.
Remove all DHW and CH connections situated beneath the boiler.
14.
Remove the three torx head screws fixing the return
manifold to the boiler sheet steel base.
15.
Lift the manifold assembly and remove from boiler.
16.
Twist and remove the DHW manifold.
17.
Remove the two diverter valve body fixing screws and
withdraw the diverter valve body assembly.
18.
Fit the new diverter valve body assemble and replace the
two fixing screws.
19.
Refit the DHW manifold, fit the assembly back to the boiler
and reassemble in reverse order.
20.
Refill the boiler and add the correct volume of anti-freeze.
Check operation of the boiler.
3.27 DHW PLATE HEAT EXCHANGER REPLACEMENT
14
11
12
13
16
18
17
3.28 PUMP HEAD REPLACEMENT
1.
Refer to Frame 3.8.
2.
Drain the boiler. Refer to Frame 3.21.
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.
1.
Refer to Frame 39.
2.
Drain the boiler. Refer to frame 52.
3.
Remove the condensate siphon. Refer to Frame 48.
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. Refer to Frames 28 & 29.
4
3
4
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