Zanussi ULTRA COMBI 35 Installation And Servicing page 50

62 DIVERTER VALVE BODY ASSEMBLY REPLACEMENT
To remove the valve body assembly:
1. Refer to Frame 43.
2. Drain the boiler. Refer to frame 57.
3. Remove the condensate trap/siphon. Refer to Frame 53.
4. Remove the electrical plug. Refer to Frame 52.
5. Place a flat bladed screwdriver in the diverter valve motor
body slot provided and ease out the motor Refer to Frame 52.
6. Remove the return thermistor electrical connection. Refer to
Frame 47.
7. Remove the pump electrical connections. Refer to Frame 64 no. 3.
8. Remove DHW Turbine electrical connection. Refer to Frame 56 no. 3.
9. Remove the DHW plate heat exchanger (note orientation).
Refer to Frame 63.
10. Undo the safety valve pipe compression fitting. See No.5 Frame 59.
11. Loosen the nut above pump and rotate the pipe.
12. If required remove expansion vessel connection hose.
Refer to Frame 69.
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.
16. Twist and remove the DHW manifold.
17. Remove the two diverter valve body fixing screws and
withdraw the diverter valve body assembly.
63 DHW PLATE HEAT EXCH. REPLACEMENT
1. Refer to Frame 43.
2. Drain the boiler. Refer to Frame 57.
3. Remove condensate trap/siphon. Refer to Frame 40.
4. Remove the diverter valve actuator. Refer to Frame 52.
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 Frame 24.
10. Check operation of the boiler. Refer to Frame 32 & 33.
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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.
19. Refill the boiler. Check operation of the boiler. Refer to
Frames 32 & 33.
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64 PUMP HEAD REPLACEMENT
1. Refer to Frame 43.
2. Drain the boiler. Refer to Frame 57.
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 Frame 24.
9. Check operation of the boiler. Refer to Frames 32 & 33.
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Installation and Servicing