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Maintenance, 1 servicing, 2 spark electrode – Glow-worm Ultracom hxi User Manual

Page 29: 3 burner

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0020107233_00 - 06/11 - Glow-worm

MAINTENANCE

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Diagram 11.4

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11.1 Servicing

IMPoRTanT: If the Combustion CO2, CO/CO2 ratio & Gas

rate checks did not require adjustment then it will not be

necessary to complete a full service.

In any case, a full service including the replacement of the

burner door seal must be carried out at least once every 5

years.

All routine servicing requirements can be achieved by the

removal of the front panel, see diagram 11.2. Position the

control box into the service position, see diagram 11.3.

Before commencing with a service or replacement of parts.

The boiler should be isolated from the electrical and gas

supplies.

13518

Diagram 11.5

11.2 Spark electrode

Disconnect the spark electrode plug and earth lead, see

diagram 11.5. Remove the two securing screws and withdraw

the spark electrode carefully from the combustion chamber,

see diagram 11.4.

Inspect the tips for damage.

Clean away any debris and check the spark gap is 3.5 to 4.5

mm.

Check the electrode gasket for signs of damage and replace if

necessary.

11.3 burner

IMPoRTanT:

● The following procedure will require that you replace the

burner door seal and nyloc nuts, Spare kit 801635.

● Removal of the burner is not necessary during a normal

service, but if it is removed it will require a new gasket, see

diagram 11.6.

● When replacing ensure that the sealing grommet, situated

below the gas valve is correctly re-seated.

Disconnect the gas valve electrical plug at the gas valve, see

diagram 11.5.

Disconnect the electrical plug from the fan.

Disconnect the spark electrode plug and earth lead, refer to

diagram 11.6.

Remove the gas pipe retaining clip.

Remove the five combustion chamber/burner door securing

nuts, see diagram 11.7, these should be discarded and

replaced with the new nylocs nuts supplied in the burner door

seal kit.

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Diagram 11.6