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6.11
Light oil supply
Explosion danger due to fuel leaks in the
presence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure the fuel shut-off valve is closed before
performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
ATTENTION
The vacuum should not exceed a maximum of 0.45 bar (35 cm
Hg). Beyond this limit, gas is released from the fuel.
When the tank is at a level lower than the burner, the return line
should terminate 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.
Before starting the burner make sure that the
return pipe line is not clogged.
Any obstruction would cause the pump seals to
ATTENTION
break.
Oil pipes must be completely airtight.
20170350
Installation
MODEL
MODEL
Key
H
=
Pump/Foot valve height difference
L
=
Pump/Foot valve height difference
Ø
=
Inside pipe diameter
20
GB
L metres
H
ø
metres
G 1/2
+ 2.0
25
+ 1.5
23
+ 1.0
20
+ 0.5
18
0
15
- 0.5
12
- 1.0
10
- 1.5
8
- 2.0
5
-3.0
3
L metres
H
ø
metres
G 3/4
+ 2.0
55
+ 1.5
50
+ 1.0
45
+ 0.5
40
0
35
- 0.5
30
- 1.0
25
- 1.5
20
- 2.0
15
-3.0
10
D2584
Fig. 17
ø
G 3/4
85
80
70
65
60
50
45
35
30
15
ø
G 1
130
120
110
100
90
80
70
60
45
25
Tab. I
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