Hydraulic Systems; Combustion Supply; Pump; Pressure Adjustment - Riello RG4S Installation, Use And Maintenance Instructions

5.11 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 the fuel interception tap is closed be-
fore 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

5.11.2 Pump

The pump is designed to allow working with two pipes.
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 suction line plug 1)(Fig. 15) is made of plastic.
Once removed, it must not be used again.
In single-pipe installations, the plug in the return
WARNING
line 2) must be totally in steel.
The pump has a delivery pressure regulation device 4)(Fig. 15).
Pressure increases if turned in a clockwise direction, and de-
creases if turned in the other direction.
An indication of sensitivity is 1 bar per turn.
The pressure can be regulated in a range of 8 - 15 bar.
Key
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

5.11.3 Pressure adjustment

 The pump leaves the factory set at 12 bar.
 If necessary, recalibrate the pressure using the screw 5)(Fig.
15).
Installation
It is necessary to install a filter on the fuel feed
line.
WARNING

5.11.1 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. 16).
2
D5527
17 GB
1
D5530
1
Fig. 14
7
6
5
4
3
2
Fig. 15
20136874