Hydraulic Systems; Combustion Supply; Pump - Riello BG7.1D Installation, Use And Maintenance Instructions

5.13 Hydraulic systems

Explosion danger due to fuel leaks in the pres-
ence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure that the fuel interception tap is closed
before performing any operation on the burner.
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
1

5.13.2 Pump

Before starting up the burner, make sure that the return pipeline
is not clogged.
An excessive back pressure ( 1 bar) would cause the damage
of the pump seal, with subsequent fuel leaks inside the burner.
The closure plug of the oil supply (Suction line
1)(Fig. 19) is made of plastic.
Once removed, you must throw it away and not re-
use it under any circumstances.
WARNING
In one-pipe systems, the plug supplied on the re-
turn line 2)(Fig. 19) of the pump is made of steel.
It is very important that the steel plug is used
only for this purpose.
The pump is designed to allow working with two pipes.
For single-pipe operation it is necessary to unscrew the return
plug 2)(Fig. 19), remove the by-pass screw 3)(Fig. 19) and then
screw in the plug 2)(Fig. 19).
Key (Fig. 19)
1 Suction line
2 Return line
3 By-pass screw
4 Gauge connection
5 2nd stage pressure adjuster
6 Vacuum gauge connection
7 1st stage pressure adjuster
8 Pressure variator piston
9 2nd stage valve
10 1st stage valve
11 Auxiliary pressure test point
20137240
Installation

5.13.1 Combustion supply

The burner is designed to allow entry of the flexible oil lines on
either side of the burner.
Depending on whether the pipe outlet is to the right or left of the
burner, it will be necessary to invert both the fixing plate 1) and
the closing bracket 2)(Fig. 18).
2
Check periodically the flexible pipes conditions.
WARNING
10
8
11
1
20 GB
1 2
D9709
1
D5345
Fig. 18
9
7
6
5
4
3
2
Fig. 19