Hydraulic Systems; Priming Pump - Riello Gulliver BLU BGK1 Manuel D'entretien

3.3 HYDRAULIC SYSTEMS

WARNING:
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 again the plug (2). (See fig. 7).
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.
SYSTEM NOT PERMITTED
IN GERMANY
Fig. 6
*

PRIMING PUMP:

On the system in fig. 6 it is sufficient to loosen the suction gauge connection
(6, fig. 7) and wait until oil flows out.
On the systems in fig. 8 and 9 start the burner and wait for the priming.
Should lock-out occur prior to the arrival of the fuel, await at least 20 sec-
onds before repeating the operation.
The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the oil. Oil pipes must be completely tight.
In the vacuum systems (fig. 9) the return line should terminate within the oil
tank at the same level as the suction line. In this case a non-return valve is
not required. Should however the return line arrive over the fuel level, a
non-return valve is required.
This solution however is less safe than previous one, due to the possibility of
leakage of the valve.
*
It is necessary to install a filter on the fuel supply line.
: Automatic shut-off device as per Ministry of Internal Affairs' regulation no. 73 dated 7/29/71.
ONLY FOR ITALY
*
H = difference of level;
2513
H
meters
8 mm
0.5
1
1.5
2
D5817
Fig. 8
L = max. length of the suction line;
4 GB
8
1
2 3 4
L meters
1 - Suction line
2 - Return line
I. D. I. D.
3 - By-pass screw
10 mm
4 - Gauge connection
10 20
5 - Pressure adjuster
20 40
6 - Suction gauge connection
40 80
7 - Valve
60 100
8 - Auxiliary pressure gauge
*
Fig. 7
D5487
5 6
L meters
H
I. D. I. D.
meters
8 mm 10 mm
0 35 100
0.5 30 100
1 25 100
1.5 20 90
2 15 70
3 8 30
3.5 6 20
Fig. 9
D5818
I. D. = internal diameter.
7