3.3 Hydraulic Systems; Priming Pump - Riello Gulliver Rg3 Montage- Und Bedienungsanleitung

3.3 HYDRAULIC SYSTEMS

WARNING:
 The burner is designed to allow installation of the oil-
lines on either side of the burner.
 It is necessary to install a filter on the fuel supply line.
 The pump is designed for use with a two-pipe system.
In order to obtain one-pipe working, it is necessary to
unscrew the return plug (2), remove the by-pass screw
(3) and then screw the plug (2) up again, (see fig. 5).

Before starting the burner make sure that the return
pipeline is not clogged. An excessive back pressure
would cause the damage of the pump seal.
Fig. 6
NOT PERMITTED
D5338

PRIMING PUMP:

On the system in fig. 6 it is sufficient to loosen the suction gauge connec-
tion (5, fig. 6) and wait until oil flows out.
On the systems in fig. 7 and 8 start the burner and wait for the priming.
Should lock-out occur prior to the arrival of the fuel, await at least 20 seconds
before repeating the operation.
The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the oil. Oil pipes must be completely tight.
In the vacuum systems (fig. 9) the return line should terminate within the oil tank
at the same level as the suction line. In this case a non-return valve is not
required. Should however the return line arrive over the fuel level, a non-return
valve is required. This solution however is less safe than previous one, due to
the possibility of leakage of the valve.
ONLY FOR ITALY: Automatic cut-off device as per Ministry of Internal Affairs' regulation n° 73 dated 7/29/71.
H = difference of level;
3280
SYSTEM
IN GERMANY
Fig. 7
L = max. length of the suction line;
8
1
2 3
L meters
H
I. D. I. D.
meters
8 mm 10 mm
0.5 10 20
1 20 40
1.5 40 80
2 60 100
5
GB
D5487
4 5 6
1 - Suction line
2 - Return line
3 - By-pass screw
4 - Gauge connection
5 - Pressure adjuster
6 - Suction gauge connection
7 - Valve
8 - Auxiliary pressure test point
L meters
H
I. D.
meters
8 mm
0 35
0.5 30
1 25
1.5 20
2 15
3 8
3.5 6
Fig. 8
ø i = internal diameter.
Fig. 5
7
I. D.
10 mm
100
100
100
90
70
30
20
D5337