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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
36
INSPECTION AND SERVICE
8-716-106-252a (03.05)
INSPECTION AND SERVICE
1 Clean the Burner:
Remove the air intake cover (H) by removing
the M5 screws and clear any debris from the air
intake and air damper.
Separate the main body of the burner from the
burner front by removing the M6 screw (J) using
a 4mm allen key.
Check the condition of the gaskets between
these parts and replace if necessary.
Note the position of the air damper adjustment
and check the air damper moves freely.
Clean both sides of the fan impeller and remove.
any debris from the burner housing.
Check that the impeller rotates freely.
Reassemble the components.
2 Inspection of Mechanical Shut-off Valve:
Remove the combustion head (K) and thoroughly
clean any deposits.
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.
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.
Refit the combustion head. Check that the
nozzle (E) lies central to the combustion head
and the head settings are as shown.
Withdraw the photocell (P) from its housing
and clean.
Remove the oil pump internal filter, clean in
kerosene and reassemble.
The internal filter is accessed by removing
screws (A) and the oil pump cover (B) on the
Danfoss BFP 11 L3 and Suntec AS47C.
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 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.
A
B
A
B
A - Retaining screws - cover
B - Cover - oil pump
H
P
J
D
5mm
Electrode gap
2.5 - 3.0mm
7.5mm
F
E
5mm
K
L
N
M
O
DANFOSS
BFP 11 L3 OIL PUMP
SUNTEC
AS47C OIL PUMP