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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
36
INSPECTION AND SERVICE
INSPECTION AND SERVICE
8-716-109-711a (04.05)
A - Nozzle to front of break plate
B - Nozzle to front of blast tube
C - Front of break plate to front of blast tube
1 Clean the Burner:
Loosen clip to remove the flexible air inlet hose
(D) from the burner (RS flue system only)
Remove the air intake cover (H) by releasing
the M4 screws.
Separate the main body of the burner from the
burner 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 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 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 or if the unit is
defective and replace with a new one.
Refit the mechanical shut-off valve.
Remove the combustion head and thoroughly
clean any deposits.
Replace the 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.
Replace 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 and clean the oil pump internal filter
using kerosene.
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)
Replace the standard flexible oil line 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.
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.
32/50kW
DANFOSS BFP 11 L3 OIL PUMP
50/70kW
DANFOSS BFP 52E L3 OIL PUMP
32/50kW
STERLING 133 BURNER SETTINGS:
Output
Dimensions (mm)
kW
A
B
C
32
22 26
4
41
2934
5
50
2935
6
50/70kW
STERLING 146 BURNER SETTINGS:
Output
Dimensions (mm)
kW
A
B
C
50
27 35
8
60
33 41
8
70
33 46 13
Q
R
L
M
N
1
E
A
B
C
F
2.5mm
E
F
6.5mm
G
G
=
=
H
P
J
D
K
2
O
