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5.12
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.
WARNING
5.12.1 Double-pipe circuit
The burner is equipped with a self-priming pump which is capable
of feeding itself within the limits listed in Tab. K.
Tank higher than burner A (Fig. 18)
The distance "P" must not exceed 10 meters in order to avoid
subjecting the pumps seal to excessive strain; the distance "V"
must not exceed 4 meters in order to permit pump self-priming
even when the tank is almost completely empty.
Tank lower than burner B (Fig. 18)
The pump depression value must not exceed 0.45 bar (35 cm
Hg). Because at higher levels gas is released from the fuel; the
pump becomes noisy and its lifetime is shortened.
It is good practice to ensure that the return and suction lines enter
the burner from the same height; the suction line is more difficult
to disconnect.
20062793
Key (Fig. 18)
H = Pump/Foot valve height difference
Ø = Inside pipe diameter
1 = Burner
2 = Pump
3 = Filter
4 = Manual on/off valve
5 = Suction line
6 = Foot valve
7 = Quick closing manual valve with remote control (Italy only)
20148180
Installation
5.12.2 Loop circuit
The loop circuit is composed of a duct starting from the tank and
going back to it, in which an auxiliary pump makes the
pressurised fuel flow. A branch from the loop supplies the burner.
This circuit is extremely useful whenever the burner pump does
not succeed in self-priming because the tank distance and/or
height difference are higher than the values listed in Tab. K.
RLS 1000/M MX
+/- H
[m]
20
22
4.0
26
45
3.0
22
39
2.0
18
33
1.0
15
26
0.5
13
23
0
11
20
-4.0
-
-3.0
-
-2.0
-
-1.0
7
14
-0.5
9
17
0
11
20
8 = On/off solenoid valve (Italy only). See electrical layout.
Connections to be carried out by the installer (SV).
9 = Return line
20
GB
RLS 1200/M MX
Ø [mm]
24
27
22
73
138
19
63
120
16
53
102
13
44
84
10
39
75
9
34
66
7
-
-
-
-
-
-
12
-
7
14
30
-
24
48
-
29
57
5
34
66
7
Ø [mm]
24
27
36
33
65
300
28
55
260
23
45
220
18
38
185
16
33
165
13
30
145
-
-
-
-
-
30
-
11
70
9
20
108
11
25
125
13
29
145
Tab. K
Fig. 18
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