Slots Setting For The Flue Gases Recirculating; Pump Pressure; Flame Detector Adjustment; Fuel Heating - Riello BG1 Instrucciones De Instalación, Uso Y Mantenimiento

4.5 AIR DAMPER ADJUSTMENT
To vary the setting adjust the screw (7) after loosing the nut (8). Values in the table refer to 12% CO
to sea level.
When burner shuts down the air damper automaticallyclose still a max. chimney depressure of 0.5 mbar.
4.6

SLOTS SETTING FOR THE FLUE GASES RECIRCULATING,

The flame tube is equipped with a device for the slots setting for
the flue gases recirculating; this recirculating system allows to
reduce the pulsations of the burner during the start.
The burner leaves the factory with the slots completely
opened.
This setting requires the following operations:
Loosen the screw (1).
Turn the ring (2) closing the slots in part until to eliminate
the pulsations verifying that the combustion values meet
the limits stated by the standards in force.
Tighten the screw (1) .
4.7

PUMP PRESSURE

12 bar: the pump leaves the factory set at this value.
To change it act on pump pressure adjust screw (5, fig. 7, page 5).
4.8

FLAME DETECTOR ADJUSTMENT,

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.
4.9

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 bur-
ner. The pre-heater remains energised during working and cuts out when burner shuts-down.
3399
(fig. 14, page 8)
(fig. 17)
9 GB
(fig. 16)
Fig. 16
S7329
Fig. 17
1
Black
Brown
and
2
3
2
Blue
S7903