Light Oil Supply; Hydraulic Connections - Riello RLS 70 Installation, Use And Maintenance Instructions

7
10
9
6
7
6
(A)
(B)
5
A
8
4
5
3
9
B
+/- H
m
Ø 12 mm
+ 4 71
+ 3 62
+ 2 53
+ 1 44
+ 0,5 40
0 36
- 0,5 32
- 1 28
- 2 19
- 3 10
- 4 -
1
2
L m
Ø 14 mm Ø 16 mm
138 150
122 150
106 150
90 150
82 150
74 137
66 123
58 109
42 81
26 53
10 25
D1178
D1185
11
LIGHT OIL SUPPLY (A)
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 com-
pletely 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 more improbable that
the suction line fails to prime or stops priming.
Key (A)
H = Pump/Foot valve height difference
L = Piping length
Ø = Inside pipe diameter
1 = Burner
2 = Pump
3 = Filter
4 = Manual on/off valve
5 = Suction line
6 = Foot valve
7 = Rapid closing manual valve
remote controlled (only Italy)
8 = On/off solenoid valve (only Italy)
9 = Return line
10 = Check valve (only Italy)
HYDRAULIC CONNECTIONS (B)
The pumps are equipped with a by-pass that
connects return line and suction line. The
pumps are installed on the burner with the by-
pass closed by screw 6)(A)p. 12.
It is therefore necessary to connect both hoses
to the pump.
The pump will break immediately if it is run with
the return line closed and the by-pass screw
inserted.
Remove the plugs from the suction and return
connections of the pump.
Insert the hose connections with the supplied
seals into the connections and screw them
down.
Take care that the hoses are not stretched or
twisted during installation.
Install the hoses where they cannot be stepped
on or come into contact with hot surfaces of the
boiler and where they do not hamper the open-
ing of the burner.
Now connect the other end of the hoses to the
suction and return lines by using the supplied
nipples.