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0006080093_00709
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 con-
necting the burner pump directly to
the cistern.
In this case, the ancillary pump can
be put into operation when the bur-
ner is started up and cut off when
it stops.
The electrical connection of the an-
cillary pump is made by connecting
the coil (30 V), which controls the
pump’s relay, to terminals “N” (the
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
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:
-
The ancillary pump must be
installed as near as possible to the
fuel to be sucked.
-
The head should suit the
system in question.
-
We recommend an output at
least to that of the burner’s pump.
-
Connection pipes should be
of a size to cope with the output of
the ancillary pump.
-
Always avoid connecting
electrically the ancillary pump’s
motor directly to the burner’s motor
relay.
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