7
20018247
GB
Installation
2.6
Hydraulic system
2.6.1
Pump
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. 10), screw the by-pass screw 3) and then
screw again the plug 2).
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.
2.6.2
Priming pump
On the system in Fig. 11 it is sufficient to loosen the suction gau-
ge connection 6) (Fig. 10) and wait until oil flows out.
On the systems in Fig. 12 and Fig. 13 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.
WARNING
The pump requires periodic maintenance carried
out by a qualified and authorised technician in
conformity with legislation and local standards.
Maintenance is essential for the reliability of the
pump, avoiding the excessive consumption of fuel
and consequent pollution.
WARNING
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-
turn line 2) must be totally in steel.
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
WARNING
Check periodically the flexible pipes conditions.
Using kerosene, they have to be replaced at le-
ast
every 2 years.
It is necessary to install a filter on the fuel supply
line.
Fig. 10
7
6
5
4
3
2
1
8
D9630
WARNING
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
organ located on the pump shaft to break.
H
ma
x. 4
m
m
in. 0.
1 m
D5741
Fig. 11
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
Fig. 12
max. 4 m
H1
H1
D1842
H1
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
