9.0
Servicing the Boiler
18
9.1
Annual Servicing
(Cont)
9. Undo the two nuts securing the valve, injector
manifold and burner assembly to the boiler
(Figs. 25 & 27).
10. Hold the manifold and carefully draw the
assembly away from the boiler. Retain the
washer from the gas inlet connection.
11. Brush any dirt or debris from the burner
skins. Examine the burners for blocked ports.
Any blockage can be removed using a fine wire
brush.
12. Inspect the pilot assembly, electrodes and
injectors (Fig. 26). Replace if necessary.
13. Ensure that the spark and sensing leads are
clipped into the separation brackets and do not
cross over each other.
14. Slide a suitable sheet of paper or cloth under
the boiler heat exchanger (Fig. 29).
15. Unclip the brush from the top edge of the left
hand side panel clean between the boiler fins
(Fig. 28 & 29). Check for any blockage.
16. Carefully withdraw the sheet and dispose of
in a proper manner. Check under the boiler and
remove any fallen dirt or debris.
17. Reassemble in reverse order of dismantling
and recommission.
18. Complete the relevant section of the
“Benchmark” Installation, Commissioning and
Service Record Log Book and hand it back to
the user.
Securing Nuts
Manifold
Pilot Assembly
Fig. 25
Fig. 26
Fig. 27
Fig. 28
Fig. 29
Sheet of Paper
Burner Skin
Cleaning Brush
Heat Exchanger Fins
