Gravity One Pipe System
It
is recommended that the oil tank is situated so that the oil outlet from the tank is not less
than
lOOmrn
(4
inches) above the oil
burner
pump.
This will
permit
the
use
of a gravity feed system
from
the
tank to
the
burner. The oil tank outlet
must
not
exceed 4 metres (13 feet approx.) above
the
burner
pump.
All Jetstreme
4+
appliances are supplied ready to
be
used
on
a gravity system.
If
it is
not
possible to
use
a gravity feed system then conversion to a two pipe system
must
be
carried
out, this is explained
on
page
7.
A filter of the metal bowl type
with
a micronic filter element
must
be fitted
in
the
oil
supply
line.
A valve
must
not
be
fitted
on
the
oil return pipe, if this
pipe
should
become blocked it
may
cause the
pump
to
faiL
The installer MUST
supply
and
fit a fire check valve in
the
oil
supply
line,
and
this valve
must
comply
with
BS
799:
part
5: 1977 Specification for Oil Storage Tanks.
The following table shows the relationship between the head
of
oil,
the
diameter of the
supply
pipe
and
the flow.
GRAVITY ONE PIPE OIL
SYSTEM
- TANK OUTLET ABOVE BURNER
SLUDGE
COCK
FILL
20 mm PER METRE FALL
VENT
t
4 METRES
MAXIMUM
FIRE CHECK
VALVE-
FLOW
-
....
L MAX PIPE LENGTH
FIRE CHECK
VALVE SENSOR
FILTER
\
JETSTREME 4 +
Fig. 1
TABLE
GIVING MAXIMUM PIPE LENGTH 'L'
I
I
r,
"ETRES
05
LO
1.5
2.0
MAXIMU
L
METRES
M
PIPE lOmrnOD
PIPE 12mmOD
10
20
20
40
40
80
60
100
Table 3
6
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