We strongly recommend the fitting of a circulating
bronze pump on the return pipe to the boiler, con-
trolled by a pipe thermostat fitted on the flow pipe
within 6” (150mm) of the appliance.
PIPE THERMOSTAT
The fitting of a pipe thermostat to the common flow
pipe within 150mm (6”) of the cooker is recom-
mended in order to activate the water circulation
pump when the boiler reaches 60
o
C. This will
ensure that the return temperatures are maintained
and allow the pump to ‘run on’ to transfer any resid-
ual heat to prevent possible overheating.
NOTE:
In line water conditioners fitted to the cold
mains supply both of chemical and magnetic type
are suitable for use with DHW cooker.
16
Fig.22
FUEL INSTALLATION
OIL STORAGE TANKS
Oil storage tanks made of steel and all connecting
equipment (eg: filling pipes and vent pipes) should
comply with B.S. 799 Part 5. Galvanised steel must
not be used. Polyethylene (Plastic) tanks should
comply with OFTEC standard OFS T100 and or
equivalent. Oil should never be stored in translu-
cent plastic containers.
An isolating valve should be fitted at the tank outlet,
in a accessible position so that the oil supply to the
appliance can be shut off if required. This isolating
valve must be of a type suitable for use with oil.
(See Fig. 23, 24, & 25 ).
In order to enable the sediment and water to be
removed from tanks a drain valve should be fitted.
Oil storage tank support must be carried out in
accordance with the tank manufactures recommen-
dations. Tanks should be located in the most unob-
structive position possible having taken safety, fill-
ing, maintenance and the need, if any, to provide a
head of oil for the burner into consideration.
FUELS
THE RECOMMENDED FUEL IS KEROSENE 28
SECOND VISCOSITY FUEL OIL.
FUEL SUPPLY LINE
The oil supply line from the oil storage tank to the
appliance should be of an approved and suitable
pipe with a minimum internal diameter of 9mm (3/8”)
and connected to the oil inlet connection located at
the cooker left hand side.
Oil supply pipes are normally run in annealed cop-
per tube complying to B.S. E.N. 1057. It can be
obtained in coil or half hard form for use with bend-
ing machines. This pipe can also be obtained with
protective plastic sheathing applied. Fittings for cop-
per pipe should be compression of the flared manip-
ulative type to B.S. : 864: Part 2 1983. Steel pipes
complying with B.S. 1387: 1985, if used, must be
protected from corrosion. Galvanised pipe and fit-
tings must not be used.
Screwed joints must only be made with tapered
threads complying to B.S. 1740: Part 1: 1971.
Jointing materials must be of types intended for use
with oil fuel. Special petroleum - resisting com-
pounds and PTFE tape are suitable. External pipes
should preferably be run with a continuous rise
towards the direction of flow, so that one can be
vented off. It is important to avoid high points which
could cause air locks.
Exposed lengths of oil supply pipe must be properly
supported by purpose made clips securely fixed in
place. Metal clips formed so as to hold the pipe on
to a saddle are preferred. Consideration should be
given to avoiding routes which expose the pipe to
severe chilling which could cause freezing of the oil.
Where pipes are buried, they must be protected
from accidental damage. The use of joints under-
ground should be avoided if at all possible. If joints
have to be fitted in pipes laid below ground, access
to them must be provided.
An oil filter (5 - 10 micron) and stop valve must be fit-
ted to the fuel feed line and located near the supply
tank and facilities should be provided to enable it to
be serviced without draining down the
INDIRECT SYSTEM ONLY
To off-load excess hot water generated during
long cooking periods, it may be necessary to
install a heat sink radiator.
NOTE:
Copper cylinder should be “finned-coil” type
with minimum capacity of 210 litres to B.S. 1566 &
B.S. 699.
Cylinder thermostat set @ 60
o
and connected to
motorised valve (see Fig.21).