5. Close the air/gas cover.
6. Completely remove the air/gas and burner/unit by unscrewing the four
M6 nuts and undoing the
3
/
4
” nut below the gas valve.
7. Check that the detection/spark electrode is not worn. Replace the
electrode if necessary.
8. Check the condition of the burner, the gasket and the insulation board.
9. Any loose deposits in the heat exchanger should be removed using a
vacuum cleaner.
10. A brush with plastic bristles can be used to dislodge any stubborn
deposits, which should then also be removed by vacuum.
11. Do not use any chemicals to clean the heat exchanger.
12. The burner does not require any maintenance as it is self-cleaning.
Check that there are no cracks and/or other damage on the surface of
the burner. If the burner is damaged, replace it.
13. Reassemble in reverse order.
10.3 Specific maintenance instructions
Warning
When changing components ensure that both the gas and
electrical supplies to the boiler are isolated before any work is
started. When the component has been changed recommission
the boiler.
Always examine any seals or gaskets, replacing where necessary.
The case front panel MUST seal effectively against the boiler side
panels.
To remove the case front panel proceed as follows:
Remove the two screws retaining the electrical cover.
Remove the electrical cover.
Disengage the two clips on the case front panel and lift the panel slightly
to remove it from the lip on top of the case.
Fig.50
Remove front panel
PN-0000521
10 Maintenance
56
7696317 - 1 - 21032018
