Pump; Pump Priming - Riello RL 42 BLU Instrucciones De Instalación, Montaje Y Funcionamiento

5.8.7

Pump

Technical data
Min. delivery rate at 12 bar pressure
Delivery pressure range
Max. suction depression
Viscosity range
Light oil max. temperature
Max. suction and return pressure
Pressure calibration in the factory
Filter mesh width
D1475
Legend (Fig. 18)
1 Suction
2 Return with screw for by-pass G 1/4"
3 Outlet at the nozzle
4 Pressure gauge attachment
5 Vacuum meter attachment
6 Screw for low pressure regulation
7 Screw for high pressure regulation
8 Pressure output or pressure gauge attachment
9 Low/high pressure switch valve
10 Safety valve
Installation
60 kg/h
4 - 25 bar
0.45 bar
2 - 12 cSt
60° C
2 bar
high pressure 22 bar
low pressure 9 bar
0.150 mm
Fig. 18
G 1/4"
G 1/8"
G 1/8"
G 1/8"
17
5.8.8

Pump priming

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.
(The pump leaves the factory with the by-pass
closed).
➤ Also check to make sure that the valves located on the suc-
tion line are open and that there is sufficient fuel in the tank.
➤ In order for self-priming to take place, one of the screws 4)-
8)(Fig. 18) of the pump must be loosened in order to bleed
off the air contained in the suction line.
➤ Start the burner by closing the control devices and with
switch 1)(Fig. 19) in the "ON" position. The pump must
rotate in the direction of the arrow marked on the cover.
➤ The pump can be considered to be primed when the light oil
starts coming out of the screw 4) or 8). Stop the burner:
switch 1)(Fig. 19) set to "OFF" and tighten the screw 4) or
8).
The time required for this operation depends upon the diameter
and length of the suction tubing.
If the pump fails to prime at the first starting of the burner and the
burner locks out, wait approx. 15 seconds, reset the burner, and
then repeat the starting operation as often as required.
After 5 or 6 starting operations allow 2 or 3 minutes for the trans-
former to cool.
The a.m. operation is possible because the pump
is already full of fuel when it leaves the factory.
If the pump has been drained, fill it with fuel
WARNING
through the opening on the vacuum meter prior to
starting; otherwise, the pump will seize.
Whenever the length of the suction piping ex-
ceeds 20-30 meters, the supply line must be filled
using a separate pump.
Burner
Off
On
GB
1 2 Stage
1°
2°
D469
20023224
Fig. 19