Riello 705M, Installation, Use And Maintenance Instructions

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17 20032186 GB
Hydraulic systems
6.1 Fuel supply
The burner is designed to allow entry of the flexible oil lines on
either side of the burner.
6.1.1 Pump
The pump is designed to allow working with two pipes.
In order to obtain one pipe working it is necessary to unscrew the
return plug 2), remove the by-pass screw 3) and then screw the
return plug 2).
Key (Fig. 12)
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.
WARNING
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
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
2
1
3
4
5
6
7
8
D10934
Fig. 12
WARNING
Where gas oil containing bio diesel is in use, it is
recommended to avoid over oxygenation of the
blended fuels.
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.
WARNING
The suction plug 1) is made of plastic. Once
removed, it must not be used again.
In single pipe installations, the plug in the re-
turn line 2) must be totally in steel.
WARNING
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.
Please contact Riello for further information.
DANGER
It is strongly recommended a periodic check of the
pump pressure operation (annually or better every
six months, if the burner operation is continuous).
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
is at least 3.7 bar.