59
8. Cleaning the burner assembly
- Clean the burner assembly by using compressed air only - between 2 and 5 bar
with the nozzle positioned a min of 10mm away and towards the face of the bur-
ner. Check that the retaining M4 screws are tight
- If the burner is removed from the front plate ensure burner retaining screws are
tight on re-assembly to a torque of 2 Nm.
9. Cleaning the inspection glass
- Remove the two retaining screws on the inspection glass holder, clean and replace.
10. Cleaning the siphon
- Remove the complete siphon (located underneath heat exchanger)
- Remove siphon bowl clean and refill with clean water and re-fit
- Re-fit siphon to heat exchanger
11. Cleaning the fan
- Use a synthetic brush to clean fan.
Attention:
be careful not to disturb the balance clips on the vanes.
12. Cleaning the venturi
- Use a synthetic brush to clean venturi – make sure that the silicon hose between
gas valve and venturi is clear and in good condition – replace if necessary.
13. Refit all removed parts in reverse order replacing gaskets where found necessary.
14. Check for gas leakage.
15. Put the boiler back in service.
16. Fire up boiler and check the combustion. Adjust as found necessary (
see Par.
11.2.1 and 11.2.2
)
17. Complete commissioning/site report and boiler log book.
Heat exchanger cleaning and burner removal
Fig. 29
Heat exchanger cleaning
