Hydraulic System; Fuel Supply - Riello RL 70/M Handleiding Voor Installatie, Gebruik En Onderhoud
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Zie ook voor RL 70/M:
- Handleiding voor installatie, gebruik en onderhoud (52 pagina's)
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Beschikbare talen
Beschikbare talen
7
Hydraulic system
7.1
Fuel supply
Double-pipe circuit (Fig. 21)
The burner is equipped with a self-priming pump which is capable
of feeding itself within the limits listed in the table at the side.
The tank higher than the burner A
The distance "P" must not exceed 10 meters in order to avoid
subjecting the pump's 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.
The tank lower than the burner B
Pump depression values higher than 0.45 bar (35 cm Hg) must
not be exceeded because 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 less proba-
ble that the suction line fails to prime or stops priming.
5996
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Hydraulic system
The loop circuit
A loop circuit consists of a loop of piping departing from and re-
turning to the tank with an auxiliary pump that circulates the fuel
under pressure. A branch connection from the loop goes to feed
the burner. This circuit is extremely useful whenever the burner
pump does not succeed in self-priming because the tank dis-
tance and/or height difference are higher than the values listed in
the table.
+ 4.0
+ 3.0
+ 2.0
+ 1.0
D701
+ 0.5
- 0.5
- 1.0
- 2.0
- 3.0
Fig. 21
- 4.0
Key
H
L
Ø
1
2
3
4
5
6
7
8
9
10 = Check valve (only Italy)
18
GB
+ H
RL 70/M
- H
Ø (mm)
(m)
10
12
14
51
112
150
45
99
150
39
86
150
32
73
144
29
66
132
0
26
60
120
23
54
108
20
47
96
13
34
71
7
21
46
-
8
21
= Pump/foot valve height difference
= Piping length
= Inside pipe diameter
= Burner
= Pump
= Filter
= Manual on/off valve
= Suction line
= Foot valve
= Rapid closing manual valve remote controlled (only Italy)
= On/off solenoid valve (only Italy)
= Return line
L (m)
RL 100/M - 130/M
Ø (mm)
12
14
16
71
138
150
62
122
150
53
106
150
44
90
150
40
82
150
36
74
137
32
66
123
28
58
109
19
42
81
10
26
53
-
10
25
Tab. B
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