Flame Detector Adjustment; Fuel Heating - Riello BG5 Instrucciones De Instalación, Uso Y Mantenimiento

4.4

FLAME DETECTOR ADJUSTMENT,

(see fig. 16)
The flame detector comes with a factory setting of 4.
It comprises:
- Potentiometer (3) for adjusting sensitivity.
- Led (1) indicating sensitivity.
- Led (2) indicating operation.
ATTENTION:
During pre-purging, the led (1 and 2) are unlit.
Stable operation is reported by both Leds lighting.
To adjust, proceed as follows:
Using the potentiometer (3), turn the indicator anticlockwise
until led (1) lights, thus determining the minimum setpoint
value.
Using the potentiometer (3), turn the indicator clockwise until
led (1) is steadily lit. Consider the final setting as the minimum
value determined, increasing by 1 or 2 notches.
Check after at least a 5-minute stop that the resulting adjust-
ment produces a correct burner start-up programme.
4.5

FUEL HEATING

In order to assure regular ignition and working also at low temperature the burner has an oil pre-heater
fitted in combustion head. The pre-heater starts when thermostats close.
When the required temperature for ignition is reached the thermostat fitted on the nozzle holder starts the
burner.
The pre-heater remains energised during working and cuts out when burner shuts-down.
3402
Black
10 GB
Fig. 16
1
Brown
3
2
Blue
S7903