Description Of Working - baltur TBG 50LX PN Instrucciones

DESCRIPTION OF WORKING

Closing switch 1, if the thermostats are closed, the voltage rea-
ches the command and control equipment (switching on of LED 2)
which starts it working. The fan motor is thus switched on (LED 3)
to carry out the preventilation of the combustion chamber, at the
same time the air damper control servo motor moves to the ope-
ning position corresponding to the maximum regulated power.
At the end of the preventilation stage the air damper has to be re-
turned to the ignition flame position. If the pressure control switch
for the ventilation air detects sufficient pressure, the ignition tran-
sformer goes on(LED 4) and, after two seconds, the main gas and
safety valves open (LED 5)
Note that:
a) The main valve has a device for the proportional adjustment of
the air to gas ratio.
b) The safety valve is an ON/OFF type.
c) The air damper is activated by an electric servo motor (see
00029336650), remember that when the burner is stop p e d
by the thermostat, the gate damper is brought back by the
servo motor to its closed position.
Note: The gas supply at the ignition flame position must general-
ly be greater than the minimum modulation capacity. The ignition
flame position can be adjusted with the air damper control servo
motor. (see 0002933650).The presence of the flame, detected by
the control device itself, permits the continuance and completion of
the ignition stage with the switching off of the ignition transformer.
Subsequently the servo motor progressively opens the air damper
and the pneumatic valve allows the gas supply to increase to its
set maximum.
If there is no flame, the control box stops in its "safety lock-out"
(LED 7) within 3 seconds from the opening of the main valve. In
the case of safety lock-out the valves immediately close again. To
release the control box from its safety position press button 8 on
the display panel.
DESCRIPTION OF MODULATION WORKING
When the burner is running at minimum capacity, if the modula-
tion probe allows, (adjusted to a temperature or pressure value
greater than that in the boiler) the air adjustment servo motor star-
ts to turn causing gradual increase in combustion air supply and,
consequently also of gas, up to the maximum supply for which
Equipment or Safety
programmer time
s
LME 22.331A2 3
LME 22.233A2 3
Preventilation
Pre-
time ignition
s s
30 2
30 2
27 / 73
000608327_2007
Legend:
1 Main switch on/off
2 Thermostat off indicator light
3 Fan motor indicator light
4 Ignition transformer indicator light
the burner has been set. The increase in the fan air pressure is
detected by the proportional gas valve sensor which gradually
adjusts gas supply to the change in air pressure. The burner stays
at maximum delivery until the temperature or pressure reaches a
level high enough to cause the modulation probe to turn the air
adjustment servo motor in the opposite direction.
The backward rotation and consequent reduction in gas and air
supply happens at brief time intervals. With this manoeuvre the
modulation system seeks to balance the quantity of heat supplied
to the boiler with that which the boiler itself provides. The mo-
dulation probe applied to the boiler detects changes in demand
and automatically adjusts the supply of fuel and of combustion
air, switching on the servo motor with an increased or decreased
rotation. If, even with fuel supply at minimum, the limit value is
reached (temperature or pressure) for which the device is set for
complete stop, (through thermostat or pressure switch) the burner
is stopped by the device.
By lowering the temperature or pressure again below the burner
stop device-triggering figure it is switched on again in accordance
with the program described in the previous paragraph.
Post Opening time
-
ignition 1st flame valve
and the 2nd flame valve
s s
2 11
2 11
5 Gas valve indicator light
7 Shutdown indicator light
8 Release button
time travel time travel
opening
closing
damper damper
s s
12 12
30 30
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