Pump Filter; External Oil Filter; Combustion Chamber - 18/25 Regular Shown - Bosch Worcester Danesmoor Utility Regular ErP+ 12/18 Installation, Commissioning And Servicing Instruction Manual

Service and Spares
▶ 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 overtighten
▶ Refit the break plate ensuring that the photocell and the break plate
[5] are aligned and secure with the screw [3] into the seating
provided [7]
▶ Reconnect the HT leads [4]
▶ Refit the blast tube [2] and secure with the screws [1]
2
3
7
4
Fig. 81 Nozzle access
Refer to figure 50:
▶ 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.
2 - 2.5mm
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
46
1
5
8
6
6720821683-12.1Wo
2
3 ± 0.3mm
4 ± 0.5mm
1
6720821683-14.1Wo
1
2
6720821683-17.1Wo
▶ 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.
B
C
A
Fig. 84 Combustion chamber
18/25 and 25/32 baffle are identified with tabs on the
front and rear edges
Greenstar Danesmoor Utility ErP+ and Utility System
6720808218-77.1Wo
ErP+ - 6 720 821 720 (2018/04)