Technical data

1122..00 SSEERRVVIICCIINNGG AANNDD MMAAIINNTTEENNAANNCCEE

1122..11 AANNNNUUAALL SSEERRVVIICCIINNGG

8. Remove the two screws securing the front panel to the

underside of the boiler. Lift the panel upwards off its retaining

studs on top of the appliance.

9. Disconnect the two leads to the fan and one lead to the gas

valve.

10. Undo the nut on the gas inlet pipe to the valve and retain

the sealing washer.

11. Remove the four nuts holding the burner door plate and

remove the valve and fan assembly (Fig. 51).

12. Clean any debris from the heat exchanger using a soft

brush and check that the gaps between the tubes are clear.

13. Inspect the burner, electrode positions and insulation,

cleaning or replacing if necessary.

14. Check the condition of the burner door seals, replacing if

necessary. Check for gas tightness and check combustion

cir

cuit is sealed.

15. Reassemble in reverse order.

16. To check if the condensate pipe is clear, carefully remove

the pipe from the bottom of the primary heat exchanger. Blow

down the pipe to ensure it is clear. If required loosen any

debris with a small conical brush and flush through with

water. Before reassembly, fill the condensate pipe with water

to ensure a water trap is formed. Finally, ensure the grommet

fitted to the condensate pipe is correctly located into the hole

in the bottom of the boiler case.

17. Complete the relevant Service Interval Record section of

the Benchmark Commissioning Checklist at the rear of this

publication and then hand it back to the user.

x Boiler

s 2008

2299

FFiigg.. 5511

FFiigg.. 4499

FFiigg.. 5500

FFiigg.. 5522

Gas Inlet Nut

Front Panel

Retaining Stud

XX 44

XX 22

Burner Door Seal

Inner Seal