SINGLE PIPE SUPPLY SYSTEM:
BOTTOM OF OIL STORAGE TANK ABOVE
BURNER
(See fig. 32)
Single pipe supply system:
Tanks servicing this
appliance by means of a single pipe need to be
positioned so that they will apply the minimum head
required 1 meter (3’ 3”) of oil to the burner when the
fuel level is at its lowest point.
Refer to B.S. 5410 to calculate the additional head
requirement relating to pipe length and size.
TWO PIPE SUPPLY SYSTEM:
BOTTOM OF OIL STORAGE TANK BELOW OR
LEVEL WITH BURNER
(see fig. 33)
If the tank base is below the level at which the
gravity feed to the burner can be maintained, a two
pipe oil supply system may be adopted. (See fig.
33). The non-return valve in the supply line of the
two pipe system is required to prevent oil running
back from the burner and unpriming the oil pump.
The non-return valve in the return line is only
required if the top of the tank is above the burner. Its
purpose is to prevent oil running back through the
burner during maintenance.
Fig.32
Fig.30
Fig.31
SINGLE PIPE SYSTEM:
WITH
DE-AERATION DEVICE BOTTOM OF OIL
STORAGE TANK BELOW OR LEVEL WITH
BURNER.
(see fig. 34):
This system can be used where the tank base is
below the level at which gravity feed to the burner
can be maintained and the burner incorporates an
oil pump. The chamber is fitted close to the burner
and is linked to the tank by a single pipe, thus saving
the return pipe required by the two pipe system as
described previously. Any air in the oil brought up
from the tank is bled off in the de-aeration chamber.
De-aeration chambers must always be installed
externally to buildings because they emit small
quantities of vapour. The chamber is connected to
the oil pump in the burner of the appliance by a
normal two pipe loop.
TIGER LOOP OIL SUPPLY
(see fig. 35)
For installations normally requiring a two pipe
system but have long or difficult return line runs, an
alternative Tigerloop Deaerator system can be used.
Tigerloop Deaerators remove air from a two pipe oil
feed. Higher lift heights can be achieved than are
possible with a conventional two pipe system.
These requirements are fully explained within the
following documents:
*
B.S. 5410: Part 1: Code of Practice for Oil
firing installations up to 45 kW output capacity
for space heating and hot water supply
purposes.
*
OFTEC - Technical Information Book Three.
Installation requirements for oil fired boiler and
oil storage tanks.
*
The Building Regulations Part J: Ireland Part F
Section 4 Scotland and Part L Northern Ireland.
*
The Building Regulations Part J: England &
Wales.
25
Fig.33
