Diverter Valve Body Assembly Replacement; Dhw Plate Heat Exch. Replacement; Pump Head Replacement - Zanussi ULTRA+ COMBI 30 Installation And Servicing

3.26 DIVERTER VALVE BODY ASSEMBLY REPLACEMENT

To remove the valve body assembly:
1. Refer to Section 3.8.
2. Drain the boiler. Refer to
3. Remove the condensate trap/siphon. Refer to
4. Remove the electrical plug. Refer to
5. Place a flat bladed screwdriver in the diverter valve motor
body slot provided and ease out the motor. Refer to Section
3.17.
6. Remove the return thermistor electrical connection. Refer to
Section 3.12.
7. Remove the pump electrical connections. Refer to
3.28 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 3.27.
10. Undo the safety valve pipe compression fitting. See No.5
Section 3.23.
11. Loosen the nut above pump and rotate the pipe.
12. If required remove expansion vessel connection hose.
Refer to Section 3.32.
13. Remove the DHW inlet and CH return connection situated
beneath the boiler.
14. Remove the four torx head screws fixing the return
manifold to the boiler sheet steel base.
15. Lift the manifold assembly and remove from boiler.

3.27 DHW PLATE HEAT EXCH. REPLACEMENT

1. Refer to Section 3.8.
2. Drain the boiler. Refer to Section 3.21.
3. Remove condensate trap/siphon. Refer to Section 3.18.
4. Remove the diverter valve actuator. Refer to Section 3.17.
5. Remove the 2 allen screws securing the plate heat exchanger
to the composite housings.
6. Manoeuvre the plate heat exchanger out of the top LH or
centre of the controls area. Be aware of any water spillage.
7. Fit the new plate heat exchanger, using the new o-rings
supplied.
Note. Ensure that the depressions are on the bottom prior to
fitting.
8. Reassemble in reverse order.
9. Refill the boiler. Refer to Section 2.17.
10. Check that the boiler operates in both DHW & CH modes.
Installation and Servicing
SECTION 3 - SERVICING
Section 3.21.
Section
Section 3.17.
Section
5
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 assembly and replace the
3.18.
two fixing screws.
19. Refit the DHW manifold, fit the assembly back to the boiler
and reassemble in reverse order.
20. Refill the boiler. Check that the boiler operates in both DHW
& CH modes.
17
16

3.28 PUMP HEAD REPLACEMENT

1. Refer to Section 3.8.
2. Drain the boiler. Refer to Section 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. Refer to Section 2.17.
9. Check that the boiler operates in both DHW & CH
modes.
4
18
14
13
3
12
11
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