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6
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 the fuel interception tap is closed be-
fore performing any operation on the burner.
6.1
Fuel supply
6.1.1
Pump
The pump is designed to allow working with one pipe.
In order to obtain two pipes working it is necessary to unscrew the
return plug 2)(Fig. 10), screw the by-pass screw 3),supplied as
burner equipment and then screw the return hose.
8
1
Key (Fig. 10)
1
Suction line
2
Return line
3
By-pass screw
4
Gauge connection
Hydraulic systems
7
6
5
4
3
2
D10934
5
Pressure adjuster
6
Vacuum gauge connection
7
Valve
8
Auxiliary pressure test point
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
Where gas oil containing bio diesel is in use, it is
recommended to avoid over oxygenation of the
blended fuels.
WARNING
Where at all possible avoid the use of two pipe
systems where the circulated fuel is returned to
the tank.
If this cannot be avoided make sure that the return
pipe is normally below the surface of the fuel level
within the storage tank. See Fig. 13.
The suction plug 1) is made of plastic. Once re-
moved, it must not be used again.
In single pipe installations, the plug in the return
WARNING
line 2) must be totally in steel.
In case of use with gas oil containing up to 10%
Bio blend, it will be essential to use flexible oil
lines suitable for bio fuel use.
WARNING
Please contact Riello for further information.
Fig. 10
15
GB
2903104
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