41
Grant Vortex Eco Utility Oil Boilers
9 - BOILER SERVICING
Cleaning the burner
9.4
Fig. 25
4 ± 0.3 mm
3 to 3.5 mm
Clamp screw
IMPORTANT: The electrode settings given above
MUST be observed
See Section 13.1
1 Combustion head - Loosen the two screws
securing the combustion head and withdraw the
head. Clean and refit the combustion head.
2 Inspect the ignition electrodes - Remove the
combustion head.
Loosen the electrode clamp screw and withdraw the
electrode assembly. Wipe clean and check for any
cracks in the ceramic insulation. Replace if necessary.
Check the electrode settings
Electrode tips approximately 4 mm apart and 3 to
3.5 mm in front of the nozzle, see Fig 25.
3 Nozzle - The nozzle should be replaced on an
annual service - Check that the nozzle size and type
are correct, refer to table in Section 3.3 and boiler
data label.
With the combustion head removed, loosen the
electrode assembly clamp screw and slide the
electrodes away from the nozzle.
Do NOT attempt to clean the nozzle.
Remove the nozzle using a good fitting spanner
(16 mm). The use of an ill-fitting spanner will
damage the nozzle and could lead to an incorrect
flame pattern. Always check the electrode
settings after replacing the nozzle, see Fig. 25.
All models
1 Photocell - The photocell is a push-fit in the burner
body. Carefully pull out the photocell to clean.
2 Burner fan - With the air intake grille or spigot
removed, remove the screws securing the fan
housing cover (R/H side of burner) and remove the
cover. Inspect the fan and housing and clean as
necessary. Replace the cover.
3 Pump filter - With the burner cover removed,
remove the four screws securing the pump end
cover. Remove the filter and wash in kerosene.
Replace the filter and end cover, ensure the 'O' ring
is in position.
Re-assemble in reverse order.
To ensure safe and efficient operation of the boiler
it is important that re-commissioning is carried out,
especially combustion checks (CO
2
level, flue gas
temperature and smoke number) after the boiler
has been serviced.
Refer to the Commissioning instructions starting on
page 37.
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