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SECTION 3 - SERVICING
3.23 PUMP AUTOMATIC AIR VENT REPLACEMENT
1.
Refer to Section 3.8.
2.
Drain the boiler. Refer to Section 3.19.
3.
Using a suitable screwdriver positioned
between the air vent dust cap and the plastic
protrusion, turn the air vent carefully anti
clockwise to disengage and lift to remove.
4.
Fit the new air vent and ensure dust cap is
open
5.
Re-assemble in reverse order.
6.
Refill the boiler and check operation.
3.24 DIVERTER VALVE BODY ASSEMBLY REPLACEMENT
To remove the valve body assembly:
1.
Refer to Section 3.8.
2.
Drain the boiler. Refer to Section 3.19.
3.
Remove the condensate trap/siphon. Refer to Section 3.16.
4.
Remove the electrical plug. Refer to Section 3.15.
5.
Place a flat bladed screwdriver in the diverter valve motor body
slot provided and ease out the motor Refer to Section 3.15.
6.
Remove the return thermistor electrical connection. Refer to
Section 3.30.
7.
Remove the pump electrical connection. Refer to Section
3.26 no. 3.
8.
Remove DHW Turbine electrical connection. Refer to
Section 3.20 no. 3.
9.
Remove the DHW plate heat exchanger (note orientation).
Refer to Section 3.25.
10.
Undo the safety valve pipe compression fitting. See No.5
Section 3.22.
11.
Remove the compression fitting above the pump and rotate
the pipe.
12.
If required remove expansion vessel connection hose.
Refer to Section 3.32, 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.
11
12
14
16
18
17
Dust Cap
3
