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INSPECTION AND SERVICE
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
38
SERVICING
& SPARES
1 Clean the Burner:
Remove the air intake cover (H) and clear
any debris from the air intake and air damper.
Disassemble the burner to allow access to
the fan impeller.
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.
Remove the combustion head (K) and
thoroughly clean any deposits.
Remove the nozzle (E).
2 12/18 & 18/25 Inspection of Mechanical
Shut-off Valve:
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.
25/32
Check the nozzle holder is clear of any debris
and clean if neccessary.
12/18, 18/25 & 25/32
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 centrally in the combustion
head and the head settings are as shown.
Ensure that the photocell 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.
The internal filter is accessed by removing
screws (A) and the oil pump cover (B) on the
Danfoss BFP 11 L3, Suntec AS47C and Riello
RDB.
Replace the standard flexible oil hose/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 cabinet.
INSPECTION AND SERVICE
A
B
A - Retaining screws - cover
B - Cover - oil pump
HPD
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
A
RIELLO
RDB OIL PUMP
B
5mm
Electrode gap 4mm
F
E
K
5mm
HPD
A
B
25/32
12/18 & 18/25