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0006081041_201102
TBG 55P -210P
Closing switch 1, if the thermostats are closed, the voltage
reaches 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 servomotor moves to the opening position corre
-
sponding to the second flame, thus the preventilation takes
place with the air damper in second flame position.
At the end of the preventilation stage the air damper goes
back to the first flame position and then the ignition tran
-
sformer switches on (LED 4) and, after 2 seconds, the gas
valves (LED 5).
Note that:
a) The main two-stage valve has a device to adjust gas
supply to the first (LED 5) and to the second flame (LED 6).
b) The safety valve is an ON/OFF type.
c) The air damper is activated by an electric servomotor
(see adjustment page 69), remember that when the burner
stops because the thermostat is triggered, the damper is
moved by the servomotor back to its closed position.
The flame’s presence is detected by control device and al
-
lows the equipment to proceed to the ignition stage with the
switching off of the ignition transformer. Subsequently the
second flame switches on (increase of combustion air and
opening according to the main second stage valve LED 6)
If there is no flame, the equipment stops at “safety lock-out”
(LED 7) within 3 seconds from the first flame opening of the
main valve.
If there is a “safety lock-out”, the valves immediately close
again.
To release the equipment from its safety position you have
to press button 8 on the display panel.
DESCRIPTION OF WORKING
TBG 55
Closing switch 1, if the thermostats are closed, the voltage
reaches the command and control equipment
(switches on LED 2) which start it working. The fan motor is
thus switched on (LED 3) to carry out the
preventilation of the combustion chamber.
The ignition transformer is then switched on (LED 4) and,
after 2 seconds, the gas valves .
In particular:
a) The main two-stage valve has a device to adjust gas
supply to the first (LED 5) and second flame (LED 6).
b) The safety valve is an ON/OFF type.
c) The combustion air can be manually regulated by means
of a gate (see page 41). Bearing in mind the burner is an
ON/OFF type, the position in which the air damper must be
regulated is that necessary for working at maximum desired
supply.
The presence of the flame is detected by the detection
device and allows the equipment to go on to the completion
of the ignition stage with the ignition transformer off. Sub
-
sequently the second flame (LED 6, opening of the second
main stage valve).
If there is no flame, the equipment stops at “safety lock-out”
(LED 7) within 3 seconds from the first flame opening of the
main valve.
If there is a “safety lock-out”, the valves immediately close
again.
To release the equipment from this safety position you have
to press button 8 on the display panel.
Equipment or
Safety
Preventilation
Pre-
Post
-
Opening time
time travel
time travel
programmer
time
time
ignition
ignition
1st flame valve
opening
closing
and the 2nd flame valve
damper
damper
s
s
s
s
s
s
s
LME 22.331A2
3
30
2
2
11
12
12
LME 22.233A2
3
30
2
2
11
30
30
Summary of Contents for TBG 55
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