2899
4
GB
3.2
HYDRAULIC SYSTEMS
H
= difference of level;
L
= max. length of the suction line;
I. D.
= internal diameter of the oil pipes.
1 - Suction line
2 - Return line
3 - By-pass screw
4 - Gauge connection
5 - Pressure adjuster
6 - Suction gauge connection
7 - Valve
8 - Auxiliary pressure test point
Fig. 7
D5912
2
3
4
7
6
5
1
8
PRIMING PUMP:
On the system in fig. 8 it is sufficient to loosen the suction gauge connec-
tion (6, fig. 7) and wait until oil flows out.
On the systems in fig. 9 and 10 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. 10) 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.
➤
The burner is designed to allow entry of the flexible oil-lines on
either side of the burner.
➤
It is necessary to install a filter on the fuel supply line.
➤
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.
WARNING:
SYSTEM NOT PERMITTED
IN GERMANY
H
meters
L meters
I. D.
8 mm
I. D.
10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
H
meters
L meters
I. D.
8 mm
I. D.
10 mm
0
0.5
1
1.5
2
3
3.5
35
30
25
20
15
8
6
100
100
100
90
70
30
20
H
max.
4 m
max.
4 m
H
H
H
D6228
Fig. 9
Fig. 10
Fig. 8
D4498
H
max.
4 m
