baltur TBG 450LX ME, Instruction Manual For Installation, Use And Maintenance

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OPERATING DESCRIPTION
Blown air burners with electronic modulation may be used on hearths
under strong pressure or in a vacuum, according to the corresponding
operating curves.
They combine a very stable fl ame with total safety and high perfor-
mance.
The burner is fi tted with an electronic cam controlled by a micropro-
cessor for intermittent operation, and for the control and monitoring of
the blown air gas burners.
Electronic modulation achieved by means of two step air gas regu-
lation motors.
The burner is fi tted with a valve tightness control device. To better
understand the operation of the electronic cam, read the specifi c in-
structions in the manual provided carefully.
The progressive two-stage operation consists in the progressive pas-
sage of combustion air and fuel, from the minimum of the fi rst stage
to the maximum of the second stage, obtaining considerable advan-
tages for the pressure stability in the gas mains.
Ignition is preceded by pre-ventilation of the combustion chamber.
The combustion chamber pre-ventilation stage takes place with the
air damper fully open.
At the end of pre-ventilation stage, the combustion air damper goes
back to ignition position.
If the air pressure switch has detected a suffi cient pressure, the igni-
tion transformer activates at the end of the ventilation phase and after
3 seconds the safety and main valves open in sequence.
The gas reaches the combustion head, mixes with air supplied by
the fan and is ignited. The gas output is regulated by the gas throttle
valve.
Three seconds after the valves (main and safety) activate, the ignition
transformer switches off.
The presence of the fl ame is detected by the control device immersed
in the fl ame (ionisation probe).
The programmer relay moves past the lock-out position and takes the
air/gas fl ow rate regulation servomotors and inverter (if fi tted) to the
minimum point.
If the modulation probe allows it (regulation at a temperature or pres-
sure value higher than the one present in the boiler), the equipment
controls the rotation of the air/gas fl ow rate regulation servomotors
and regulates the motor's RPM (if the inverter is fi tted). This deter-
mines a gradual increase of the power burned until you reach the
maximum output to which the burner has been set.
CAUTION / WARNINGS
The electronic cam controls the burner, activating the combu-
stion air, gas servomotor and the fan motor, if the inverter is
fi tted, according to a curve that has ten points set (see curve
regulation table).
The burner remains in the maximum output position as long as the
temperature or pressure reaches a value suffi cient enough to cause
the intervention of the probe that rotates the gas/air fl ow rate regula-
tion servomotors. This progressively reduces the gas, combustion air
and motor's RPM (if the inverter is fi tted) to the minimum.
If the threshold value of temperature or pressure to which the control
device is set is reached, the burner will be shut down.
As temperature or pressure drops below the control device set-point,
the burner is started again as described above.
During normal operation, the modulation probe installed on the boiler
measures any variation in temperature or pressure and automatical-
ly adjusts the fuel and combustion air fl ow rate through the relevant
servomotors.
• in a clockwise direction the air fl ow increases;
• anticlockwise rotation: the air fl ow decreases.
In this way the burner is able to optimise the request of heat to be
supplied to the boiler.
If the fl ame does not appear within 3 seconds after the gas valves
have opened, the control box goes into the lock-out condition (the
burner shuts down completely and the warning light turns on).
To “reset” the control box operation, press the reset button.
ENGLISH
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0006160281_202007