47
Installation and Servicing
Section 3 - Servicing
SER
VICING
1. Drain the boiler.
2. Undo the two screws and remove the sump cover
retaining the lower flue manifold.
3. Lift the manifold to clear the bottom sealing gasket and
remove manifold.
4. Remove the fan / venturi assembly and place on one
side.
5. Remove the burner and place on one side.
6. Remove the ignition/detection electrode.
7. Remove the spark generator.
8. Remove the gas valve.
9. Remove the 2 M5 screws retaining the spark generator
mounting bracket and transfer bracket to the new heat
exchanger.
10. Remove the two retaining pipe clips and remove pipes.
11. Remove the condensate rubber pipe.
12. Remove the heat exchanger fixing screw.
13. Remove the Heat exchanger, slide out of location
bracket.
14. If replacement sump required: Rotate heat exchanger
assembly 180º. Place new sump onto heat exchanger,
ensuring correct orientation and seal is in place.
Then gently apply pressure to the base of the sump
at each tab fixing point and engage tabs onto the heat
exchanger.
15. Reassemble, ensuring the heat exchanger is located
correctly in the RHS retaining bracket. Replace any new
‘O’ rings supplied with new heat exchanger and replace
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 diametres.
3.19 HEAT ENGINE REPLACEMENT
Refer to Section
3.7
Refer to Section
3.7
Refer to Section
2.16
Refer to Section
3.12
Refer to Section
3.15
16.
Ensure the trap is filled with water.
17. Refill the boiler and check for leaks.
18. Ensure all gas valve connections are gas tight with a
gas soundness check up to the gas control valve.
19. Check that the boiler operates.
Refer to Section
2.22
Refer to Section
3.17 No.2
Refer to Section
3.17
5
11
14
10
16
8
6
12
13
9
1
1
CAUTION:
Protect the gas and electrical controls with
a waterproof sheet.
9
Refer to Section
2.1
Refer to Section
1.20
Refer to Section
3.2