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ENGLISH
AUXILIARY PUMP
In some cases (excessive distance or difference in level) it is necessary to install a “loop-type” supply system with an
auxiliary pump, which dispenses with the connection of the burner pump directly to the tank.
In this case the auxiliary pump can be put into operation when the burner is started up and cut-off when the latter
stops.
The electric wiring of the auxiliary pump is made by connecting the coil (220 V) which controls the pump remote
control switch to terminals “N” (equipment terminal board) and “L1” (downstream the motor remote control switch).
It is important to comply strictly with the previsions set forth here below:
- The auxiliary pump should be installed as near as possible to the fuel to be sucked.
- Its head should meet the requirements of subject system.
- We recommend a delivery rate equal to at least that of the burner pump.
- Connection pipes should be sized to cope with the delivery rate of the auxiliary pump.
- Always avoid to electrically connect the auxiliary pump directly to the remote control switch of the burner motor.
DIAGRAM OF PIPES OF FEED SYSTEM FOR LIGHT OIL BURNERS OR HEAVY OIL BURNERS WITH
MAXIMUMNOMINAL VISCOSITY (5 °E AT 50 °C)
The light oil recovery tanks (diameter ~ 150 - height ~ 400)
should be installed as near as possible to the burner and
should be about 0,5 m. higher with respect to the burner’s
pump.
8666-3.tif
1 - Main tank
2 - Filter
3 - Circulation pump
4 - Water and plant discharge
5 - Air-gas discharge, normally closed
6 - Fuel and degasser recovery
7 - One-way valve
8 - By-pass (normally closed)
