Worcester DANESMOOR FS12/18 Installation And Servicing Instructions page 24

7. Replace the Nozzle.
NOTE: It is strongly recommended that the oil atomising nozzle
be replaced at each service. If this is not possible then remove
and clean the integral filter, but under no circumstances should
the nozzle be stripped into its component parts and never
attempt to clean the nozzle tip.
8. Check and reset the electrodes, where necessary, as shown in
Fig. 22.
9. Replace the combustion head and check that the nozzle lies
central to the combustion head and the head settings are as
shown in Fig. 22.
10. Withdraw the photocell from its housing and clean.
11. Remove and clean the oil pump internal filter using
kerosene or white spirit. The internal filter is accessed by
unscrewing and withdrawing the cartridge on the Danfoss BFP
41 as indicated in Fig. 6.
12. It is recommended that the standard flexible oil line is
replaced at each yearly service to prevent the possibility of a
leak due to ageing.
13. Re-assemble the burner components.
14. Check the sponge O-ring seal located around the
combustion head and replace if necessary. It is imperative that
this seal is in good condition since failure will cause the flue
gases to be circulated into the room.
14.4 Remove the paper element from the external oil filter and
replace. If the filter contains a washable element then
thoroughly clean in Kerosene or white spirit and re-assemble
into the filter.
14.5 Clean the Boiler
1. Remove the access door by releasing the four M10 nuts and
check the rope seal and insulation board. Replace if necessary.
2. Remove the baffle retainer, as shown in Fig 23.
3. Remove the baffles, clean and check their condition. Replace
any baffles considered to be badly corroded, or having
insulation blocks showing damage.
4. Thoroughly clean all of the heat exchanger surfaces using a
stiff wire brush and vacuum clean all loose debris from the
combustion chamber.
5. Check and clean the flue.
6. Refit the baffles, making sure that they are pushed to the
back of the boiler as shown in Fig. 23.
7. Refit the baffle retainer as shown in Fig. 23.
8. Replace the access door.
14.7 Fire Valve.
1) Check that a fire valve is fitted in accordance with BS 5410, as
stated in Section 8.6.2.
2) Test the operation of the fire valve to ensure that the
mechanism operates and the oil supply is completely isolated.
14.8 Refitting the Burner.
1. Remove the sample point screw.
2. Connect the flexible oil supply hose to the isolating valve and
tighten sufficiently to form a good seal. Where a double pipe
system is being used connect the oil return flexible hose to the
return pipe fitting.
3. Turn the isolating valve fully anti-clockwise to open the valve.
4. With the sponge 'O' ring gasket around the burner
combustion head,gh repeat 5.1—5.5 in reverse order.
5. Re-commission the burner as described in Section 12.
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