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5.12 Hydraulic systems
Explosion danger due to fuel leaks in the pres-
ence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that the fuel interception tap is closed
before performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
1
5.12.2 Pump
The pump is designed to allow working with two pipes.
Before starting up the burner, make sure that the return pipeline
is not clogged.
An excessive back pressure ( 1 bar) would cause the damage
of the pump seal, with subsequent fuel leaks inside the burner.
For single-pipe operation it is necessary to un-
screw the return plug 2), remove the by-pass
screw 3) and then screw in the plug 2)(Fig. 21).
WARNING
The pump has a delivery pressure regulation device 5).
Pressure increases if turned in a clockwise direction, and de-
creases if turned in the other direction.
An indication of sensitivity is 1 bar per turn.
Check periodically the flexible pipes conditions.
If necessary, install a filter on the fuel supply line.
WARNING
20136933
Installation
5.12.1 Combustion supply
The burner is designed to allow entry of the light oil supply pipes
on either side of the burner.
It is necessary to install a filter on the fuel supply line.
2
8
1
2
3
1
Suction line
2
Return line
3
By-pass screw
4
Gauge connection
5
Pressure adjuster
6
Vacuum gauge connection
7
Valve
8
Auxiliary pressure test point
5.12.3 Pressure adjustment
The pump leaves the factory set at 12 bar.
If necessary, recalibrate the pressure using the screw 5)
Fig. 20.
20
GB
4
5
6
1
D5345
Fig. 19
D5487
7
Fig. 20
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