OIL
The burner will only run on kerosene class C2 to
BS 2869. Failure to use the correct oil
—or use of a
heating oil mixture
—will invalidate the warranty.
Storage tank
The oil storage tank should be large enough to allow for
an economic delivery schedule. It should be located in
an unobtrusive position that nevertheless provides easy
access for deliveries and pays regard to safety issues,
maintenance and the head of oil required.
The tank should be fitted with weather-protected fill and
vent connections, a drain-off and an oil level indicator.
Plastic or Steel tanks may be used, and must comply
with the requirements of BS 799 Part 5 (Specification
for Oil Storage Tanks). Steel tanks must be mounted on
brick or block piers, with a waterproof membrane fitted
between the piers and tank.
Fire protection
While it highly unlikely that a fire could start from a
domestic oil tank, protection is required from a fire that
may originate elsewhere. The tank should be at least
1.8 metres from any building and 750mm from a site
boundary. Where it is not feasible to adhere to these
limits, the building wall must not have any openings
other than those required for ventilation, and the wall
must have a fire resistance of half an hour extending at
least 1.8 metres from any part of the tank.
Alternatively, a non-combustible radiation barrier
—
meeting the requirements of BS 5410 Part 1
—can be
fitted. This applies to tanks of up to 3,500 litres
capacity.
Fire protection must be provided to the eaves if less
than 1.8 metres from the top of the tank. Cladding must
extend at least 300 beyond the tank
—which must be
mounted on a non-combustible base.
Pollution protection
The tank must be bunded (double-walled) if:
The tank is less than 10 metres from a stream.
The tank is less than 50 metres from a well, spring,
or other source of drinking water.
The tank cannot be seen from the point of delivery.
There is a risk of oil reaching a manhole cover or
drain in the event of a leak.
The tank capacity exceeds 2,500 litres.
Supply
A long-life flexible oil hose is supplied with the boiler. A
filter and shut-off valve are also required. These should
be fitted in the positions shown on
figs 10
,
11
and
12
.
All oil line joints must be completely sealed and the total
pipe run should be thoroughly flushed before
connection is made to the burner.
DO NOT
use
soldered joints in the oil line.
A remote-operated fire valve must be fitted in the oil
supply line, externally to the premises, with the sensing
phial located at a point within the boiler casings above
the burner.
Single-pipe oil supplies
(
fig 10
)
Where the lowermost part of the tank is above the level
of the oil pump on the burner, a single-pipe gravity
system can be used. The supply pipe should be
connected to the suction port on the burner pump via
the flexible hose (supplied).
Two-pipe oil supplies
(
fig 11
)
Where the lowermost part of the tank is below the level
of the burner, a two-pipe suction lift is necessary. A
second flexible hose will be required, and the oil pump
must first be converted for use. See the burner leaflet
for details.
A spring-loaded non-return valve must be fitted in the
suction line to prevent the back-flow of oil when the
burner is not running. No valves are to be fitted to the
return line.
The pump suction must not exceed 0.4 bar, as
dissolved gas may be released from the oil, affecting
combustion. The return pipe must end at the same level
as the suction outlet to prevent loss of prime. The tank
outlet should be approximately 75mm above the bottom
of the tank to prevent the drawing off of sediment and
water when the oil begins to run low.
Single pipe oil supplies with a de-aerator
(
fig 12
)
Where a two-pipe suction lift is required, but it is not
feasible to fit a return pipe, an oil de-aerator can be
used. The burner should be piped
—and the pump
converted
—as for a two-pipe system, up to the de-
aerator, at which point a single pipe can be taken to the
storage tank. The de-aerator should be fitted as close
to the boiler as possible
—though externally to the
premises
—at a height no lower than the oil pump.
A non-return valve is not required.