10
3.1 Fuel Supply
Fuel Storage
The tank should be positioned in
accordance with the recommendations
given in BS 5410:1:1997, which gives
details of filling, maintenance and
protection from fire.
A steel tank may be used and must be
constructed to BS 799:5:1987 and OFS T200.
A galvanised tank must not be used.
A plastic tank may be used and must
comply with OFS T100.
Plastic tanks should be adequately
and uniformly supported on a smooth
level surface, across their entire base
area, that is, the area in contact with
the ground.
Fuel Pipes
Fuel supply pipes should be of copper
tubing with an external diameter of at
least 10 mm.
Galvanised pipe must not be used.
All pipe connections should preferably
use flared fittings. Soldered connections
must not
be used on oil pipes.
Flexible hoses must NOT be used
outside the boiler case of Kitchen/
Utility models.
A remote sensing fire valve must be
installed in the fuel supply line (outside)
where it enters the building, with the
sensing head located above the burner.
Recommendations are given in BS
5410:1:1997.
A metal bowl type filter with a
replaceable micronic filter must be fitted
in the fuel supply line adjacent to the
boiler. A shut-off valve should be fitted
before the filter, to allow the filter to be
serviced.
A flexible fuel line, adaptor and ¼" BSP
isolation valve are supplied loose with
the boiler for the final connection to
the burner. If a two pipe system or
'Tiger Loop' type de-aerator is used, an
additional flexible fuel hose (900 mm)
and
3
/
8
" to
1
/
4
" BSP male adaptor are
available to purchase from Grant UK,
Part No. RBS36.
Metal braided flexible hoses should be
replaced annually when the boiler is
serviced. Long life flexible hoses should
be inspected annually and replaced at
least every 60 months.
Single pipe system - (See Figure 3-1)
With the storage tank outlet above the
burner a single pipe system should be
used. The height of the tank above the
burner limits the length of pipe run from
the tank to the burner.
As supplied the burner is suitable for a
single pipe system
Two pipe system - (See Figure 3-2)
With the storage tank outlet below the
burner, a two pipe system should be
used. The pipe runs should be as shown
in Figure 3-2. The return pipe should be
the same level in the tank as the supply
pipe, both being 75 to 100 mm above
the base of the tank. The pipe ends
should be a sufficient distance apart so
as to prevent any sediment disturbed by
the return entering the supply pipe.
Avoid the bottom of the tank being more
than 3.5 m below the burner.
A non-return valve should be fitted in the
supply pipe together with the filter and
fire valve. A non-return valve should be
fitted in the return pipe if the top of the
tank is above the burner.
To be used with a two-pipe system, the
burner
must
be fitted with an additional
flexible fuel pipe (a flexible fuel hose (900
mm) and
3
/
8
" to
1
/
4
" BSP male adaptor
are available to purchase from Grant
UK), Part No. RBS36.
The pump vacuum should not exceed
0.4 bar. Beyond this limit gas is released
from the oil.
For guidance on installation of top outlet
fuel tanks and suction oil supply sizing,
see OFTEC Technical Book 3. Available
from OFTEC.
3
Oil Storage & Supply System
CAUTION
!
CAUTION
!
NOTE
!
Filter
Fire
valve
Shut-off
valve
Shut-off
valve
A
Sludge
valve
Fill
pipe
Vent
pipe
Level
gauge
Fuel
storage
tank
Fire
valve
sensor
Pump
Head A
(m)
Maximum pipe run (m)
0.5
1.0
1.5
2.0
10mm OD pipe
10
20
40
60
12mm OD pipe
20
40
80
100
Oil Storage & Supply
System
Figure 3-1:
Single pipe system
