Burner Operation; Burner Starting - Riello RL 42 BLU Installation, Use And Maintenance Instructions

6.4

Burner operation

6.4.1

Burner starting

Starting phases with progressive time intervals shown in sec-
onds:
– Control device TL closes.
After about 3s:
– 0 s: The control box starting cycle begins.
– 2 s: The fan motor starts.
– 3 s: The ignition transformer is connected.
The pump sucks the fuel from the tank through the pip-
ing and the filter and pumps it under pressure to deliv-
ery. The piston rises and the fuel returns to the tank
through the piping.
The screw closes the by-pass heading towards suction
and the solenoid valves, de-energized, close the pas-
sage to the nozzles.
– 5 s: The servomotor opens the air gate valve: pre-purging
st
begins with the 1
– 26 s: The solenoid valves open 8); and the fuel passes
through the piping 12) and filter 13) and is then sprayed
out through the nozzle, igniting when it comes into con-
tact with the spark. This is the 1
– 32 s: The ignition transformer switches off.
– 33 s: If the control device TR is closed or has been replaced
by a jumper wire, the servomotor opens the fan air gate
nd
valve in the 2 stage.
nd
– 35 s: The 2 stage solenoid valve is opened.
The starting cycle comes to an end.
Legend (Fig. 24)
Yellow Red
For further details see pag. 23.
20023224
Start-up, calibration and operation of the burner
stage air delivery.
st
stage flame.
Green
TL
TR
VS
VH/ L
2°
1°
SM
0
TL
Off
VS
VH/L
20 GB
NORMAL FIRING
A
A
NO FIRING
D10413
D10414
Fig. 24