20132157
10
GB
Installation
5.4
Fuel oil gravity feed systems
5.4.1
Gravity system
For fuel oil with viscosity max. 7°E at 50°C.
Priming pump:
loose the tap of the vacuometer plug (5, Fig. 3) and wait for the
fuel flow.
H
: Difference in the pipes height
L
: Length of the suction pipe
5.4.2
Suction system
For fuel oil with viscosity max. 7°E at 50°C.
Not advised, to be used only in case of previously existing
system.
Never overcome the max. depression of 0.5 bar (38 cm Hg).
With higher values the fuel emanates gas. The pipes shall be
perfectly sealead. When the tank is placed below of the burner
level, the return pipe should reach the same level of the suction
pipe. In this case the foot valve is not required.
Explosion danger due to fuel leaks in the
presence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure the fuel interception tap is closed
before performing any operation on the burner.
WARNING
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
H
meters
L meters
ø 3/4”
ø 1”
0
5
10
0,5
8
15
1
11
20
1,5
14
25
2
17
30
Fig. 4
D2629
H
meters
L meters
ø 1”
ø 1 1/4”
0
24
45
0,5
21
40
1
18
35
1,5
15
30
2
12
25
2,5
9
20
3
6
15
Fig. 5
D2630
