14
11
12
10
68
HEAT ENGINE RENEWAL
Refer also to Frame 6 - ‘Boiler Exploded View’
IMPORTANT
Before starting the removal procedure, protect the gas and electrical controls with a waterproof sheet or plastic bag.
11. Undo the inlet pipe union nut and remove the retaining spring
clip and remove pipe.
12. Undo the ow pipe union nut and remove pipe.
13. Remove the condensate rubber pipe. Refer to Frame 53, no. 2.
14. Remove the two heat exchanger xing screws.
15. Remove the Heat exchanger, slide out of location bracket.
16. Reassemble in reverse order, ensuring the heat exchanger LH
retaining bracket is correctly positioned. Replace any new ‘o’
rings supplied with new heat exchanger and replacing gaskets
or seals if any sign of damage is evident. When replacing the
spring clips located on the return pipe connection, ensure clip is
oriented to correctly match connecting pipe diameters.
17. Ensure the trap/siphon is lled with water. Refer to Frame 53.
18. Rell the boiler. Refer to Frame 24.
19. Check operation of the boiler. Refer to Frames 32 & 33.
1. Refer to Frame 43.
2. Drain the boiler. Refer to Frame 57.
3. Remove the fan / venturi assembly and place on one side.
Refer to Frame 44.
4. Remove the burner and place on one side. Refer to Frame
46.
5. Remove the ignition and detection electrodes and divertor
actuator head. Refer to Frames 48, 49 and 52.
6. Remove the spark generator. Refer to Frame 50.
7. Remove the gas valve. Refer to Frame 51.
8. Remove the expansion vessel. Refer to Frame 69.
9. Remove the ow thermistor. Refer to Frame 67.
10. Remove the 2 M5 screws retaining the gas valve mounting
bracket and transfer bracket to the new heat exchanger.
SERVICING
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