40
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
9 - BOILER SERVICING
Fig. 27 - 155/200 and 200/240 baffles and turbulators (all models)
200/240 shown
Top baffle
Bottom baffle
IMPORTANT:
The ends of the
turbulators must
be vertical
Position in vertical plane
Cleaning the burner
9.4
Fig. 28 - 90/120 and 120/155 baffles
Top set
Bottom set
Fig. 29
4 ± 0.3 mm
3 to 3.5 mm
Clamp screw
IMPORTANT: The electrode settings given above
MUST be observed
Check the electrode settings
Electrode tips approximately 4 mm apart and 3 to
3.5 mm in front of the nozzle, see Fig 29.
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. 29.
50/70, 50/90, 90/120, 120/155 models - 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.
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