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NOTES FOR USE AND MAINTENANCE OF FUEL PUMPS
Make sure that the by-pass plug is not used in a single pipe
installation, because the fuel unit will not function properly
and damage to the pump and burner motor could result.
Do not use fuel with additives to avoid the possible forma-
tion over time of compounds which may deposit between
the gear teeth, thus obstructing them.
After filling the tank, wait before starting the burner. This
will give any suspended impurities time to deposit on the
bottom of the tank, thus avoiding the possibility that they
might be sucked into the pump.
On initial commissioning a "dry" operation is foreseen for a
considerable length of time (for example, when there is a
long suction line to bleed). To avoid damages inject some
lubrication oil into the vacuum inlet.
Care must be taken when installing the pump not to force
the pump shaft along its axis or laterally to avoid excessive
wear on the joint, noise and overloading the gears.
Pipes should not contain air pockets. Rapid attachment
joint should therefore be avoided and threaded or mechani-
cal seal junctions preferred. Junction threads, elbow joints
and couplings should be sealed with removable sg compo-
nent. The number of junctions should be kept to a minimum
as they are a possible source of leakage.
Do not use PTFE tape on the suction and return line pipes
to avoid the possibility that particles enter circulation.
These could deposit on the pump filter or the nozzle, redu-
cing efficiency. Always use O-Rings or mechanical seal
(copper or aluminium gaskets) junctions if possible.
Filter must be thoroughly cleaned at least once in a season
to ensure correct working of the fuel unit. To remove the fil-
ter, unscrew the four screws on the cover. When reassem-
ble, make sure that the filter is mounted with the feet
toward the pump body. If the gasket between cover and
pump housing should be damaged, it must be replaced. An
external filter should always be installed in the suction line
upstream of the fuel unit.
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APPENDIX: COMPONENTS CHARACTERISTICS
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