Riello RDB 2.2 BX 15/21 - Fuel Supply; Pump

Installation
20113295
14
GB
5.8 Fuel supply
5.8.1 Pump
The pump is designed to allow working with one pipe.
For two pipe operation it is necessary to unscrew the return plug
2) (Fig. 10), screw the by-pass screw 3) and then screw back on
the plug 2).
Pump pressure
The pump is factory set to the values shown in Tab. G on
page 17.
Key (Fig. 10)
1 Gas oil suction line
2 Return line
3 By-pass screws
4 Manometer connection
5 Pressure adjuster
6 Vacuometer connection
7 Gas oil solenoid
8 Auxiliary pressure test points
WARNING
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
organ located on the pump shaft to break.
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
Where light 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.
WARNING
In case of use with light oil containing up to 30%
bio blend, it will be essential to use flexible oil lines
suitable for biofuel use.
Please contact the manufacturer for further infor-
mation.
2
3
5
6
7
1
8
4
Fig. 10
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