baltur TBG 80 LX ME /V, Instruction Manual For Installation, Use And Maintenance

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MODULATION OPERATION 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 flame with total safety and high perfor -
mance.
The burner is fitted 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 fitted with a valve tightness control device. To better
understand the operation of the electronic cam, read the specific in -
structions in the manual provided carefully.
The term two-stage progressive operation indicates that transition
from the first to the second state (from minimum to maximum ope -
ration) is progressive in terms of both amount of combustion air let
in and the amount of output fuel. This results in a greater pressure
stability in the gas supply network.
Ignition is preceded by the combustion chamber pre-ventilation, as
set forth by the standards, with air open and with a duration of approx.
30 seconds.
If the air pressure switch has detected a sufficient 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.
Gas reaches the combustion head, mixes with air supplied by the fan
and is ignited. The gas supply is regulated by the butterfly gas valve.
Three seconds after the valves (main and safety) come on, the igni-
tion transformer goes off. Thus the burner is ignited at the ignition
point.
The presence of the flame is detected by the control device (ionisa -
tion probe immersed in the flame).
The programmer relay moves past the locking position and sends
voltage to the air/gas supply adjustment servomotors, which go to the
minimum point (200).
If the second stage boiler thermostat (or pressure switch) allows it
(set to a temperature or pressure value higher than the existing value
in the boiler), the air/gas supply servomotors will start to turn, gra -
dually increasing gas and combustion air supplies up to the maximum
supply to which the burner has been set (999).
CAUTION / WARNINGS
The electronic cam controls the burner, activating the combu -
stion air, gas servomotor and the fan motor, if the inverter is
fitted, 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 sufficient enough to cause
the intervention of the probe that rotates the gas/air flow rate regula -
tion servomotors. This progressively reduces the gas, combustion air
and motor's RPM (if the inverter is fitted) 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 flow rate through the relevant
servomotors.
In this way the burner is able to optimise the request of heat to be
supplied to the boiler.
If the flame 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.
A
B
farfalla_gas_TBGME
A Graduated scale.
B Gas throttle valve position reference index.
ENGLISH
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0006081328_202001