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6
Hydraulic systems
6.1
Fuel supply
The burner is designed to allow entry of the hose-lines on either
side of the burner.
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. 9), screw the by-pass screw 3),supplied as
burner equipment and then screw the return hoses.
8
1
Key (Fig. 9)
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
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. 12.
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 30%
Bio blend, it will be essential to use flexible oil
lines suitable for bio fuel use.
WARNING
Please contact Riello for further information.
It is strongly recommended a periodic check of
the pump pressure operation (annually or better
every six months, if the burner operation is contin-
uous).
DANGER
If the value is lower than 1 bar, compared to that
one of the initial setting, please check the cleaning
of the pump and line filters.
In case the pressure setting was not restorable,
please replace the pump, in order to guarantee
that the pump pressure during the pre-purge time
Fig. 9
is at least 3.7 bar.
13
GB
20032173
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