Electrode Setting; Burner Start-Up Cycle; Combustion Head Setting - Riello Burners 40 G20S Manuel D'entretien

ELECTRODE SETTING

Attention:
Before assembling or remov-
ing the nozzle, loosen the
screw (A) and move the
electrodes ahead.

BURNER START-UP CYCLE

Thermostat
Motor
Ignition transformer
Valve
Ignition flame
High flame
Lock-out lamp
ADJUSTMENTS, TO AVOID FLAME - DETACHMENT, AT BURNER - IGNITION
1) CORRECT POSITIONING OF THE ELECTRODES
( See fig. 7)
2) NOZZLE: ATOMIZING ANGLE
Choose 60° nozzle
3) 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.
4) 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).
2354
(see fig. 7)
Fig. 7
Normal
~ ~
12s
4 ±
0.3 mm
D6303
Lock-out, due to light-failure
6s
9
GB
MOVE THE ELECTRODE
HOLDER BACKWARDS
TO THE END
A
6.5 ±
0.5 mm
~ ~
12s 5s D5796