Worcester Greenstar 12/18 Installation, Commissioning And Servicing Instruction Manual page 36

Service and Spares
NOTICE:
▶ Before removing or fitting a nozzle [3], loosen and
move the electrodes [1] forward.
▶ After refitting check that the electrode gaps are
correct, as shown in figure 65, page 36
▶ Remove the nozzle [3].
Do not dismantle the nozzle or clean the nozzle tip.
▶ Every annual service the nozzle should be replaced.
▶ Check the nozzle holder is clear or any debris and clean if necessary.
▶ Fit a new oil atomising nozzle [3].
1
2.
3.
3
1.
Fig. 64 Nozzle replacement
▶ Check the electrodes [2] and reset if necessary as shown.
▶ Refit the combustion head [3]. Check that the nozzle [1] is central in
the combustion head [3] and the head settings are as shown.
2
5mm
1
2
2.5mm
Fig. 65 Nozzle and electrode gaps
36
1
2
3
4mm
12/18
model only
4
5
▶ Remove the oil pump internal filter [2], clean in fuel oil and
reassemble.
▶ The internal filter is accessed by removing screws [3] and oil pump
cover [1].
1
3
Fig. 66 Oil pump filter
NOTICE: Risk of oil leak!
Possibility of leakage due to ageing of oil supply pipe/s.
▶ Replace the standard flexible oil supply pipe/s at
every annual service.
▶ Reassemble the burner components.
▶ Check the O-ring seal located around the combustion head and
replace if necessary.
DANGER: Risk of escaping combustion gasses!
Leakage of combustions gasses from damaged or
missing combustion head seal.
▶ Always check the seal around the combustion head
before refitting the burner combustion head into
appliance collar.
Re-commission the burner
Combustion settings
▶ Refer to table 8, page 31.
▶ Remove plastic cover [1] from the burner.
▶ Fit a suitable pressure gauge to the bleed and pressure gauge port
[2] on the oil pump.
1
Fig. 67 Access to bleed and pressure gauge port
Greenstar Danesmoor External ErP and External System
2
6720808191-83.1Wo
6720809437-40.2Wo
ErP - 6 720 813 288 (2014/09)
2