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ANCILLARY PUMP (see BT 8666/3)
In some cases (excessive distance, difference in level or high viscosity), it is necessary to install a “loop-type” supply
system with an ancillary pump, which dispenses with connecting the burner pump directly to the cistern.
In this case, the ancillary pump can be put into operation when the burner is started up and cut off when it stops.
The electrical connection of the ancillary pump is made by connecting the coil (230 V), which controls the pump’s relay,
to terminals “N” (the control box’s line input terminal board) and “R” (down stream the motor’s relay).
It is important to comply strictly with the following provisions:
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The ancillary pump must be installed as near as possible to the fuel to be sucked.
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The head should suit the system in question.
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We recommend an output at least to that of the burner’s pump.
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Connection pipes should be of a size to cope with the output of the ancillary pump.
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Always avoid connecting electrically the ancillary pump’s motor directly to the burner’s motor relay.
DIAGRAM OF PIPES OF FEED SYSTEM FOR LIGHT OIL BURNERS OR
HEAVY OIL BURNERS WITH MAXIMUM NOMINAL VISCOSITY 5 °E AT 50 °C
N° BT 8666/3
REV.03/06/2003
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)
- 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.
A
T
THE BURNER
A
T
THE BURNER
A
T
THE BURNER
