2685
4
GB
3.2 HYDRAULIC SYSTEMS
The burner is designed to allow entry of the flexible oil-lines on either side of the burner.
H
= difference of level;
L
= max. length of the suction line;
I. D.
= internal diameter of the oil pipes.
PRIMING PUMP:
On the system in fig. 6 it is sufficient to loosen the suction gauge
connection (6, fig. 5) and wait until oil flows out.
On the systems in fig. 7 and 8 start the burner and wait for the priming.
Should lock-out occur prior to the arrival of the fuel, await at least 20 seconds
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. 8) 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 re-
quired. 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.
The standard filter code 6276200 and that one with recirculation
code 6276201 are available on request
.
■
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. 5).
■
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:
1 - Suction line
2 - Return line
3 - By-pass screw
4 - Gauge connection
5 - Pressure adjuster
6 - Suction gauge connection
7 - Oil valve
8 - Auxiliary pressure test point
Fig. 5
D5912
2
3
4
7
6
5
1
8
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
Fig. 6
H
max.
4 m
D6287
SYSTEM NOT
IN GERMANY
PERMITTED
H
max.
4 m
max.
4 m
H
H
H
D6288
Fig. 7
Fig. 8
