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0006081041_200708
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 star
-
ts 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 corresponding to
the second flame, thus the preventila
-
tion 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
transformer 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.
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 22.1A2
0
2
2
11
12
12
LME 22.2A2
0
2
2
11
0
0
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 cham-
ber.
The ignition transformer is then
switched on (LED 4) and, after 2 se
-
conds, 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 regu
-
lated 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. Subsequently 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 val
-
ves immediately close again.
To release the equipment from this sa-
fety position you have to press button
8 on the display panel.
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 allows the equip
-
ment to proceed to the ignition stage
with the switching off of the ignition
transformer. Subsequently the second
flame switches on (increase of combu
-
stion 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 val
-
ves immediately close again.
To release the equipment from its sa-
fety position you have to press button
8 on the display panel.
