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OIL SUPPLY
This appliance is suitable for kerosene (28
second oil) only, no other fuel must be used.
OIL SUPPLY:
• Plastic or steel tanks should be installed to
BS 5410. A steel tank should conform to
BS 799: part 5 and have a slope of 1 in 24
away from the outlet valve with a sludge cock
at its lower end.
• Do not use galvanised steel tanks or
pipework for the oil supply system.
• Do not use soldered joints on the oil
supply pipework.
a) Single pipe gravity feed system:
The oil storage tank (A) must be positioned so
that the oil level does not exceed 4 metres above
the level of the burner oil pump (J) and in addi-
tion the oil level must be at least 300mm above
the oil pump (J). Where the maximum oil level in
the oil storage tank exceeds 4 metres, a head
breaking device must be installed between the
tank (A) and the burner oil pump (J).
b) Double pipe sub-gravity feed system:
Maximum suction height 3.5 metres. Non-return
valves must be fitted to the inlet and return oil
line between the oil pump (J) and oil storage
tank (A).
c) Single pipe suction lift with de-aerator
Maximum suction height 3.5 metres. The oil
tank (A) must be positioned below the oil pump
(J). Create an inlet and return loop between the
de-aerator (M) and oil pump (J).
A non-return valve must be incorporated within
the de-aerator or fitted to the oil line between
the oil storage tank (A) and the de-aerator (M).
A top feed oil tank fitted with a de-aerator
using an internal non-return valve should have
any non-return valves fitted in the base of the
tank to the suction line removed to assist
purging air from the oil line.
Pipework
Use copper pipe of the correct diameter
according to the information shown opposite.
Use flexible hoses to connect to the oil pump (J).
Lay the oil supply pipe (H) as straight and
level as possible to avoid air pockets and
unnecessary friction losses. Route away
from the boiler access door or other hot
surfaces.
Install a manual isolating valve (B) to the oil
supply pipe (H), as close to the oil storage
tank (A) as possible.
Fit an oil strainer and water seperator (C) to
the oil supply pipe, near the oil storage tank.
Fit an additional oil filter (N, 16µm max
filtration size) close to the boiler, but not
inside the boiler casing.
Fit a fire valve in accordance with BS 5410.
The fire valve (D) must be fitted externally
at least 1 metre from the appliance with the
fire valve sensor (F) located within the
appliance case.
A capillary type valve provides a neat and
simple installation. Alternatively, a fusible
link or electrical system may be used.
Under no circumstances should a
combination isolating/fire valve be used
as the sole fire protection device.
A
F
BN
GJ
4m (13ft) max.
K
a)
H
300mm
min.
B DB C
MAXIMUM PIPE RUN FOR SINGLE PIPE GRAVITY FEED SYSTEM
B
A
DB
C
E
K
3.5m (11.5ft) max.
L
L
b)
H
F
G
B
150mm
MAXIMUM PIPE RUN FOR DOUBLE PIPE SUB-GRAVITY FEED SYSTEM
N
J
B
A
M
B
F
C
G
J
3.5m (11.5ft) max.
E
D
c)
MAXIMUM PIPE RUN FOR SINGLE PIPE SUCTION LIFT WITH DE-AERATOR
H
FUEL FLOW RATE
FUEL FLOW RATE
K
1m
min
.
1m
min
.
1m
min
.
E
OIL SUPPLY
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
9
PRE -
INSTALLATION
A - Oil storage tank
B - Isolating valve
C - Oil strainer & water seperator
D - Fire valve to BS5410
E - External casing
F - Fire valve sensor
G - Oil burner
H - Oil supply pipe
J - Oil pump
K - Full base (plastic tanks)
L - Non-return valve
M - De-aerator
N - Oil filter (16µm max filtration size)
NOTE: All dimensions are in metres unless stated otherwise.
The maximum pipe run figures are based on using copper pipe with an inside diameter of
2mm less than the Ø.
HEAD 10mmØ 12mmØ
0.5 12 30
1.0 25 69
1.5 37 91
2.0 49 100
HEAD 10mmØ 12mmØ
2.5 62 100
3.0 74 100
3.5 87 100
4.0 99 100
HEAD 10mmØ 12mmØ
050 100
0.5 44 100
1.0 38 95
1.5 32 80
HEAD 10mmØ 12mmØ
2.0 26 66
2.5 20 50
3.0 14 37
3.5 8 22
HEAD 2.5kg/h 5kg/h 10kg/h 10kg/h
8mmØ 8mmØ 8mmØ 10mmØ
0 100 55 26 100
0.5 95 45 23 100
1.0 80 40 20 90
1.5 70 35 17 75
HEAD 2.5kg/h 5kg/h 10kg/h 10kg/h
8mmØ 8mmØ 8mmØ 10mmØ
2.0 60 30 14 65
2.5 45 25 11 50
3.0 35 15 8 35
3.5 25 10 5 20
The table and illustration above is a guide only and does not in any way override the de-
aerator manufacturers instructions.