Light Oil Supply; Pump; Priming Pump - Riello RDB1R GRANT MILTON 20 kW Installation, Use And Maintenance Instructions

6.7

Light oil supply

6.7.1

Pump

Explosion danger due to fuel leaks in the
presence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure the fuel shut-off valve is closed before
performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
Before activating the burner, ensure that the re-
turn line in the tank is not clogged.
The presence of any obstacle would cause the
WARNING
rupture of the seal device located on the pump
shaft.
 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. 11), screw the by-pass screw
3),supplied as burner equipment and then screw the return
hose.
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.
 In the two pipes systems, before starting the burner make
sure that the return pipe-line is not clogged. An excessive
back pressure would cause the damage of the pump seal.
 Check periodically the flexible pipes conditions.
 A metal bowl filter (60 µm) with replaceable micronic filter
must be fitted in the oil supply pipe.
8
1
Key (Fig. 11)
1 Suction line
2 Return line
3 By-pass screw
4 Gauge connection
5 Pressure adjuster
D9630
6 Suction gauge connection
7 Valve
8 Auxiliary pressure
point
Installation
WARNING
6.7.2

Priming pump

On the system in Fig. 12 it is sufficient to loosen the suction
gauge connection 6)(Fig. 11) and wait until oil flows out.
D5741
H
metres
0.5
1
1.5
2
7
H difference of level
L maximum length of the suction line
Ø internal diameter of the oil pipes
6
5
4
3
2
Fig. 11
test
11 GB
Periodically check the condition of the flexible
hoses.
It is necessary to install a filter on the fuel supply
line.
60 µm
L metres
Ø (8 mm)
10
20
40
60
Fig. 12
Ø (10 mm)
20
40
80
100
Tab. D
20166849