Priming The Pump - Riello PRESS 3G Installation, Use And Maintenance Instructions

All burner controls are clearly indicated into the instruction.
Only the air damper adjustment for the second flame, is determined at the place of installation, depending on
the boiler pressure.
ATTENTION
At the first ignition, passing from the first to the second flame, the oil pressure decrease noticeably because of the
filling of the second nozzle line - this decreasing can cause the burner shutdown, sometimes with strong pulsantions.

PRIMING THE PUMP

In case of a gravity feed system, from the bottom of the oil-storage tank, loosen the screw of the suction-gauge fixing
point 3 (fig. 1), until the fuel flows out.
In the other two cases, remove the high voltage cable from the ignition transformer and release air from the pressure
gauge fixing point, by loosening the screw 4 (fig. 1) do not light on the photo-resistor, because lock-out immediately
will occur.
Should the burner go to lock-out re-set the control-box and repeat the cycle as often as necessary.
CAUTION
Check, before starting the burner, that the return line to the oil-storage tank is not in any way obstructed.
Any obstruction would cause the breakage of the pump seal.
Thermostat
Motor
Ignition transformer
st
1 Solenoid valve
nd
2 Solenoid valve
Lock-out lamp
MOTOR LOCK-OUT
This is caused by the thermal protector relay, in case of overloading, or by the lacking of the phase.
To reset pushdown the appropriate knob, after having removed the protective cover
5903
BURNER START-UP CYCLE 60Hz
Normal
9
Lock-out because
no ignition
D2713