Pump; Oil Pressure Switch - Riello RL 100/E Installation, Use And Maintenance Instructions

4.10.4 Pump

Pump model
Min. delivery rate at 290 PSI pressure
Delivery pressure range
Max. suction pressure
Viscosity range
Max light oil temperature
Max. suction and return pressure
Pressure calibration in the factory
Filter mesh width
Key (Fig. 25)
1 Suction
2 Return
3 Pressure gauge attachment
4 Vacuum gauge attachment
5 Pressure adjustment screw
6 By-pass screw

4.11 Oil pressure switch

The oil pressure switch 15)(Fig. 3, page 9) is factory set to 43.5 PSI
(3 bar). If the oil pressure goes above this value in the return piping,
the pressure switch stops the burner.
Burner starts again automatically if the pressure goes down under
43.5 PSI (3 bar) after burner shut down.
If a loop circuit with Px pressure feeds the burner, the pressure
switch should be adjusted to Px + 43.5 PSI.
Installation
SUNTEC J7 C
GPH 60.8
PSI 145 - 304.5
"Hg 13
cSt 2.8 - 200
°F 194 (90 °C)
PSI 21.8
PSI 290
inch 0.006
Tab. M
D2352
Fig. 25
1/2" NPT
1/2" NPT
G 1/8"
G 1/8"
25
Pump priming
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the seal located
WARNING
on the pump shaft to break.
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 priming operation is possible because the
pump is already full of fuel when it leaves the facto-
ry. If the pump has been drained, fill it with fuel
through the opening on the vacuum meter prior to
CAUTION
starting; otherwise, the pump will seize.
Whenever the length of the suction piping exceeds
66 - 98 ft, the supply line must be filled using a sep-
arate pump.
GB
20103379