20115639
12
GB
Hydraulic systems
6.1
Fuel supply
6.1.1
Pump
The pump is designed to allow working with one pipe.
In order to obtain two pipes working it is necessary to unscrew the
return plug 2)(Fig. 9), screw the by-pass screw 3), supplied as
burner equipment and then screw the return hose.
Key (Fig. 9)
6
Hydraulic systems
WARNING
The suction plug 1) is made of plastic. Once re-
moved, it must not be used again.
In single pipe installations, the plug in the return
line 2) must be totally in steel.
1 Suction
line
2 Return
line
3 By-pass
screw
4 Gauge
connection
5 Pressure
adjuster
6
Vacuum gauge connection
7 Valve
8
Auxiliary pressure test point
2
1
3
4
5
6
7
8
D10934
Fig. 9