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About the use 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 formation 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 mechanical seal
junctions preferred. Junction threads, elbow joints and couplings should be sealed with removable sg component. 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, reducing efficiency. Always use O-Rings or mechanical seal (copper or
aluminium gaskets) junctions if possible.
An external filter should always be installed in the suction line upstream of the fuel unit.
Light oil pumps
Pumps provided according to the burner model are:
SINGLE-STAGE BURNER: Suntec AS47
DOUBLE-STAGE BURNER: Suntec AT2
Suntec AS47
Viscosity
2 - 12 cSt
Oil temperature
0 - 60 °C
Min. inlet pressure
- 0.45 bar to avoid gasing
Max. inlet pressure
2 bar
Max. return pressure
2 bar
Rotation speed
3600 rpm max
Keys
1 Pressure governor
2 Pressure gauge port
3 Vacuum gauge port
4 Solenoid valve
5 To the nozzle
7 Inlet
8 Return