Riello G20 Installation, Use And Maintenance Instructions page 10

ADJUSTMENTS, TO AVOID FLAME - DETACHMENT, AT BURNER - IGNITION
1) CORRECT POSITIONING OF THE ELECTRODES
2) NOZZLE: ATOMIZING ANGLE
Choose 60° nozzle.
3) PUMP - SETTING
The pump is factory set, at a pressure of 12 bar.
When the temperature of the gas-oil decreases below + 5 °C, increase the pressure to 14 bar.
4) COMBUSTION-HEAD SETTING
Regulate the combustion-head one set-point further ahead than indicated in the instructions.
Example: the instructions require to set the combustion-head on set-point 3.5.
Instead, the setting is made on set-point 4.5.
5) FAN - AIR DAMPER ADJUSTMENT
Adjust the damper, reducing the excess air until the Bacharach number is not near 1.
(i.e. a combustion with the lowest possible excess-air).
20013653
4 ±
0.3 mm
D5288
A
MOVE THE ELECTRODE
HOLDER BACKWARDS TO
THE END
8 GB
6.5 ±
0.5 mm