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5.12.2 Pump priming
Before starting the burner, make sure that the
tank return line is not clogged.
Obstructions in the line could cause the seal-
WARNING
ing organ located on the pump shaft to break.
(The pump leaves the factory with the by-pass
closed).
– Also check to make sure that the valves located on the suction
line are open and that there is sufficient fuel in the tank.
– In order for self-priming to take place, the pressure gauge at-
tachment plug located on the pump (or the gauge itself, if ap-
plied) (See "Pump" on page 22.) must be loosened in order to
bleed off the air contained in the suction line and bring the
pump delivery pressure to zero.
– Do not illuminate the photocell; otherwise, the burner will fail to
start.
– Start the burner by closing the control device and the electrical
line main switch. The pump must rotate in the direction indicat-
ed by the arrow marked on the cover or the pump body.
– When the gas oil begins to flow out of the gauge attachment,
the pump is primed. At this point, stop the burner immediately.
The time required for this operation depends upon the diameter
and length of the suction tubing. If the pump fails to prime at the
first starting of the burner and the burner locks out, wait approx.
40 seconds, reset the burner, and then repeat the starting oper-
ation as often as required.
The a.m. operation is possible because the pump
is already full of fuel when it leaves the factory. If
the pump has been drained, fill it with fuel through
WARNING
the opening on the vacuum meter prior to starting;
otherwise, the pump will seize. Whenever the
length of the suction piping exceeds 20-30 me-
ters, the supply line must be filled by hand using a
separate pump.
Once the pump has been primed, screw in the
plug or the gauge on the pump's delivery line tight-
ly and close the control devices.
Installation
23
GB
20033097
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