2416
2
PRIMING PUMP
On the system in fig. 5
it is sufficient to loosen the suction gauge
connection (8, fig. 4) and wait until oil flows out.
On the systems in fig. 6 and 7
start the burner and wait for the priming.
Should lock-out 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 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.
H
= difference of level;
L
= max. lenght of the suction line;
I.D.
= internal diameter.
max. 4 m
Fig. 5
H
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
O
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.
O
The pump is designed for operation on a two line sys-
tem. In order to convert it for single line system it is
necessary to unscrew the return plug (2),
remove the
by- pass screw (3)
and then to tighten the plug (2)
(see fig. 4).
SYSTEM NOT PERMITTED
IN GERMANY
D5517
1
- Suction line
2
- Return line
3
- By-pass screw
4
- Gauge connection
5
- Suction gauge connection
6
- Pressure adjuster
7
- Coil
8
- Main line port
9
- Auxiliary pressure test point
Fig. 4
4
6
3
2
7
9
1
8
5
D6186
HYDRAULIC SYSTEMS
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
D5518
H
H
H
H
ma
x. 4 m
Fig. 6
Fig. 7
ma
x. 4 m
