Pump; Pump Adjustment; Priming Pump - Riello RLS 160/M MX Installation, Use And Maintenance Instructions

5.11.5 Pump

Technical data
PUMP J7 C
Min. delivery rate at 12 bar pressure
Delivery pressure range
Max. suction depression
Viscosity range
Max. light oil temperature
Max. suction and return pressure
Pressure calibration in the factory
Filter mesh width
Key (Fig. 26)
1 Suction line
2 Return line
3 Pressure gauge connection
4 Vacuometer connection
5 Pressure adjuster
6 By-pass screw

5.11.6 Pump adjustment

No adjustment of gas delivery is required.
The pump leaves the factory set at 12 bar, a pressure to be
checked and eventually modified after the burner has been
started. In this phase, therefore, limit to apply a pressure gauge
on the specific pump connector.
It may be necessary to adjust the pump to:
10 bar in order to reduce fuel delivery.
It is possible only if the ambient temperature remains above 0 C;
14 bar in order to increase fuel delivery or to ensure firings even
at temperatures of less than 0 °C.

5.11.7 Priming pump

Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
ATTENTION
organ located on the pump shaft to break. (The
pump leaves the factory with the by-pass closed).
 Make sure that the valves on the suction line are open and
that there is fuel in the tank.
 In order for self-priming to take place the screw 3)(Fig. 26) of
the pump (Fig. 26) must be loosened in order to bleed off the
air contained in the suction line.
 Start the burner by closing the control devices, with the
switch 1)(Fig. 27) in "MAN" position and switch 10)(Fig. 7) in
"OIL" position.
20148049
Installation
230 kg/h
10 - 21 bar
0.45 bar
2.8 - 200 cSt
90 °C
1.5 bar
12 bar
0.170 mm
Tab. K
D1251
Fig. 26
G 1/2"
G 1/2"
G 1/8"
G 1/8"
24
 The pump can be considered primed when the light oil starts
coming out of the screw 3)(Fig. 26). Stop the burner: set
switch 1)(Fig. 27) to "OFF" and tighten the screw 3)(Fig. 26).
 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. And so
on.
After 5 or 6 starting operations allow 2 or 3 minutes for the
transformer to cool.
 Do not light the flame sensor in order to prevent the burner
lockout; the burner locks out in any case about ten second
after its start.
The above-mentioned 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
ATTENTION
through the opening on the vacuum meter prior to
starting; otherwise, the pump will seize.
Whenever the length of the suction piping
exceeds 20-30 meters, the supply line must be
filled using a separate pump.
GB
1 2
D791
Fig. 27