Inspection And Service - Bentone Sterling Burners) - Worcester GREENSTAR UTILITY 32/50 Instruction Manual

8 716 109 711 b 07.10 14/7/10
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR UTILITY 32/50 & 50/708 716
109 711B 07.2010
09:59 Page 41
INSPECTION AND SERVICE
1 Clean the Burner:
Loosen clip to remove the flexible air inlet hose
(D) from the burner (RS flue systems only).
Remove the air intake cover (H) by releasing
the M4 screws.
Seperate the main body of the burner from
the front by removing the M5 screw ( J ),
located beneath the air adjustment screw
(K), using a 4mm allen key.
Check the condition of the gasket between
these two parts and replace if necessary.
Note the position of the air damper
adjustment and check the air damper moves
freely.
Clean both sides ofthe fan impeller and
remove any debris from the burner housing.
Check the impeller rotates freely.
Reassemble components.
2 Inspection of Mechanical Shut-off Valve:
Remove the nozzle (E).
Fasten an M5 screw, with a minimum length
of 30mm, into the threaded hole (L) and pull
the screw to withdraw the check valve (M).
Check that the nozzle holder (N) is clear of
any debris and clean if necessary.
Check that the three holes in the check valve
(M) are clear of any debris. Check the
condition of the 'O' ring (O). Discard the
check valve if the holes cannot be cleared, if
the unit is defective or if the 'O' ring is
damaged and replace with a new one.
Refit the check valve.
Remove the combustion head and thoroughly
clean any deposits.
Fit a new oil atomising nozzle (E).
DO NOT dismantle the nozzle and DO NOT
clean the nozzle tip.
Check the electrodes (F) and reset if
necessary as shown opposite. The electrode
assembly must be positioned at 3 o'clock as
shown.
Refit the combustion head. Check that the
nozzle (E) lies centrally in the combustion
head and the head settings are as shown.
Ensure that the photo cell is lined up with the
sight hole.
Withdraw the photocell (P) from its housing
and wipe clean.
Remove the oil pump internal filter, clean in
kerosene and reassemble.
Danfoss BFP 11 L3 internal filter is accessed
by removing the oil pump cover (Q).
Danfoss BFP52E L3 internal filter is accessed
by unscrewing and withdrawing cartridge (R).
IMPORTANT
Replace the standard flexible oil hose/s
at every annual service to prevent the
possibility of oil leakage.
Reassemble the burner components.
Check the sponge O-ring seal located
around the combustion head and replace if
necessary.
This seal must be in good condition since
failure will cause flue gases to escape into
the room.
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.
INSPECTION AND SERVICE
41