20059594
22
GB
Installation
4.10
Light oil supply
4.10.1 Double-pipe circuit
The burner is equipped with a self-priming pump which is capable
of feeding itself within the limits listed in the Tab. J.
The tank higher than the burner A
The distance “P” must not exceed 33 ft in order to avoid subjecting
the pump's seal to excessive strain.
The distance "V" must not exceed 13 ft in order to permit pump self-
priming even when the tank is almost completely empty.
The tank lower than the burner B
Pump suction values higher than 13 “Hg must not be exceeded be-
cause at higher levels gas is released from the fuel, the pump starts
making noise and its working life-span decreases.
It is good practice to ensure that the return and suction lines enter
the burner from the same height.
In this way it will be more improbable that the suction line fails to
prime or stops priming.
Tab. J
Key (Fig. 20)
1
Burner
2
Pump
3
Filter
4
Manual on/off valve
5
Return line
6
Foot valve
7
Suction line
H
Pump/foot valve height difference
L
Piping length
Ø
Inside pipe diameter
Explosion danger due to fuel leaks in the presence
of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that 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
ft
L (ft)
Ø 5/16”
Ø 3/8”
Ø 1/2”
+ 13
+ 10
+ 6.6
+ 3.3
+ 1.6
115
99
86
69
63
296
263
227
194
174
500
500
500
428
391
0
56
158
355
- 1.5
- 3.3
- 6.6
- 10
- 13
49
43
30
13
-
141
122
89
53
20
319
283
211
138
66
1
2
3
7
5
6
6
7
5
4
+
H
-
H
V
P
1
0
c
m
D2543
Fig. 20
B
A
Содержание RLS 28/E
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