Hydraulic Systems; Pressurised One Pipe Systems; Priming Pump - Riello G23 RBLU Instrucciones Para La Instalación, Uso Y Mantenimiento

3.3 HYDRAULIC SYSTEMS

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.
PUMP
(see fig. 5)
The pump is designed to allow working with two pipes.
Before starting 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.
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 again the plug (2) with a tightening torque of 0.5 Nm.
The pump has a delivery pressure regulation device (5). Pressure in-
creases if turned in a clockwise direction, and decreases 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
Do not loosen the knob (8) and periodically check that it is
firmly fixed, for safety reasons.

PRESSURISED ONE PIPE SYSTEMS

Pressurised one pipe systems have a positive fuel pressure on in-
take to the burner. Usually the tank is higher than the burner, or the
fuel pumping systems are on the outside of the boiler.
Figure 7 is an example of connection to a pressurised ring, no matter what position the ring feeder tank is in.
SYSTEM NOT PERMITTED
IN GERMANY
ONLY FOR ITALY
:
Automatic shutoff device as per Ministry of Internal Affairs' regulation no. 73 dated 7/29/71.
The installer must ensure that the supply pressure is not above 0.5 bar.
!
Above that level, the pump seal is subject to too much stress.
H = difference of level; L = max. length of the suction pipe; ø i = internal diameter of the oil pipe.
In the system in fig. 6, the table shows the maximum indicated lengths for the supply line, depending on the
difference in level, length and the diameter of the oil pipes.

PRIMING PUMP

It is sufficient to loosen the vacuometer connection (6, fig. 5) and wait until oil flows out.
3221
÷
15 bar.
(fig. 6 and 7)
Fig. 6
H
meters
8 mm
0.5
1
1.5
2
D7310
Fig. 5
1 - Suction line
2 - Return line
3 - By-pass screw
4 - Pressure gauge connection
5 - Pressure adjuster
6 - Vacuometer connection
7 - Valve
8 - Knob
L meters
ø i ø i
10 mm
10 20
20 40
40 80
60 100
5 GB
1
D5912
Fig. 7
D7311
8
7
5
6
4
3
2