Pump - Riello RG2D Installation, Use And Maintenance Instructions

6.11.2 Pump

Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
WARNING
organ located on the pump shaft to break.
380T1
394T1
397T1
S9657
Key to layout (Fig. 18)
1 Suction line
2 Return line
3 By-pass screw
4 Gauge connection
5 2nd stage pressure adjuster
6 Vacuum gauge connection
7 2nd stage valve
8 1st stage valve
9 Valve body unit
10 Auxiliary pressure test point
11 Pressure variator piston
12 1st stage pressure adjuster
Check periodically the flexible pipes conditions.
If necessary, install a filter on the fuel supply line.
WARNING
20135920
Installation
The pump is designed to allow working with two pipes.
For the one pipe operation it is necessary to unscrew the return
plug 2) Fig. 18, remove the by-pass screw 3) and then the plug 2)
back in.
398T1
9
20 GB
8 7
10 1
D5405
6
5
4
3
2
Fig. 18