49
EN
4.8.2.1 Two-pipe system (standard)
The pump is configured for two-pipe operation.
Fig. 20
4.8.2.2 Single-pipe system (optional)
If a single-pipe system is used, a single flexible pipe for the oil
is required.
For this type of connection, it is necessary to remove the by-pass
grub screw (10) (using a 4 mm Allen key) and fit the plug (11) (5
mm Allen key) along with its seal.
11
10
Fig. 21
a
WARNING
Before starting the burner, verify that the return line is
free. Any obstruction can damage the pump’s sealing
device.
a
WARNING
– Only certified supply lines must be used.
– A single flexible pipe is required for single-pipe sy-
stems.
m
CAUTION
There is an internal filter and a pressure regulator
integrated in the pump. The vacuum gauge must be
connected before starting up the burner.
4.8.3
Two-pipe systems
Burner lower than the tank
X
Y
H = x-y
A
Fig. 22
H (m)
Lunghezza tubo (m)
Ø6 mm
Ø8 mm
Ø10 mm
0,5
19
60
100
1
21
66
100
1,5
23
72
100
2
25
79
100
2,5
27
85
100
3
29
91
100
3,5
31
98
100
-
-
-
-
a
WARNING
– X < 20m
– A = Bottom valve, which must be kept as low as pos-
sible to prevent cavitation. In any case, Y < 4m.
Burner higher than the tank
H
A
Fig. 23
H (m)
Lunghezza tubo (m)
Ø6 mm
Ø8 mm
Ø10 mm
1
13
41
99
1,5
11
34
84
2
9
28
68
0,5
7
22
53
1
5
15
37
1,5
-
9
22
2
-
-
-
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