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Worcester-Bosch Greenstar Danesmoor Utility Regular - Utility System Manual

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Service and Spares
Greenstar Danesmoor Utility 2022+ and Utility System 2022+ - 6 721 846 263 (2022/01) 49
▶ Use a suitable spanner to stop the nozzle body turning
▶ Remove the nozzle [8]and secure the new nozzle, hand tight
▶ Tighten the nozzle utilising the two spanners used during removal, do
not over-tighten
Fig. 80 Nozzle access
Refer to figure 81 Photo cell alignment
▶ Refit the break plate [5] ensuring that the break plate is pushed fully
on to the nozzle holder [6].
▶ To align the hole [9] in the break plate with the photocell, ensure that
the fixing screw [3] is located fully in the seating [7] provided in the
nozzle holder [6].
Fig. 81 Photocell alignment
▶Reconnect the HT leads [4]
▶ Refit the blast tube [2] and secure with the screws [1]
Refer to figure 82:
▶ Check that the nozzle [1] and the electrode [2] alignment settings
are correct.
▶ Ensure that the nozzle [1] is aligned centrally within the combustion
head [3].
▶ Inspect for any visible defects.
Fig. 82 Nozzle and electrode alignment
7.7 Pump filter
▶ Refer to figure 83 and remove the oil pump internal filter, clean in
Kerosene and reassemble.
The internal filter is accessed by removing screws [1] and the oil pump
cover [2].
Fig. 83 Pump filter access
▶ Replace the standard flexible oil line/s at every annual service to
prevent the possibility of leakage due to ageing.
▶ Reassemble the burner components.
▶ Check the O-ring seal located around the combustion head and
replace if necessary. This seal must be in good condition, seal failure
will cause flue gases to escape into the room.
7.8 External oil filter
▶ Remove the paper element from the external oil filter and replace it.
If the filter contains a washable element, thoroughly clean in
Kerosene and reassemble into the filter.
7.9 Combustion chamber - 18/25 Regular shown
▶ Release the M10 retaining nuts and washers (A) and remove baffle/
combustion chamber access door (B).
▶ Check the fibreglass rope seal on the baffle/combustion chamber
access door (B) and replace if necessary.
▶ Remove the one piece baffle set (C), clean and check the condition.
Replace if considered to be badly corroded/degraded.
▶ Thoroughly clean all of the heat exchanger surfaces using a suitable
brush and clear all loose debris from the combustion chamber.
▶ Check the condition of the baffle/combustion chamber access door
insulation. If the insulation is damaged the door assembly must be
replaced.
▶ Ensure one piece baffle set [C] is in the right location, correctly
resting on the baffle rests [D] on either side of the combustion
chamber and pushed securely into place.
Baffle sets for the 18/25 and 25/32 boilers are identified with tabs
on the front and rear edge
▶ Refit baffle/combustion chamber access door (B).
▶ Secure with nuts and washers (A) and tighten until the door is firmly
secured. Do not over tighten the nuts.
6720821683-12.1Wo
8
6
4
3
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2
1
3
9
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0010032270.001
2 - 2.5mm 6720821683-14.1Wo
4 ± 0.5mm
3 ± 0.3mm
2
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6720821683-17.1Wo
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… 49 …


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