Fuel Supply; 5.10.1 Pump; 5.10.2 Pump Pressure - Riello RDB 3.2 BX 32/50 Installation, Use And Maintenance Instructions

5.10

Fuel supply

5.10.1 Pump

Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
WARNING
organ located on the pump shaft to break.
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. 12), tighten the by-pass screw (3) and then
screw again the plug (2).
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-
WARNING
turn line 2) must be totally in steel.
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.
WARNING
If this cannot be avoided make sure that the return
pipe is normally below the surface of the fuel level
within the storage tank.
In case of use with light oil containing up to 10%
bio blend, it will be essential to use flexible oil lines
suitable for biofuel use.
WARNING
Please contact the manufacturer for further infor-
mation.

5.10.2 Pump pressure

The pump is set in factory according to the values indicated in
Tab. F on page 19.
20151139
Installation
8
20083081
1
Key
1 Gas oil suction line
2 Return line vat
3 By-pass screws
4 Manometer connection
5 Pressure adjuster
6 Vacuometer connection
7 Gas oil solenoid
8 Auxiliary pressure test
points
16
GB
7
5
3
2
6
4
Fig. 12