FDMB - Fire damper
Page 6
Version 2022-12-20
TPM 164/22
Design with actuating mechanism
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The dampers are equipped by Belimo actuators with
spring return and thermoelectric activation device of BFL,
BFN or BF depending on the damper size (further mentio-
ned as „actuators“).
■
After being connected to power supply 230V or AC/DC
24V, the actuating mechanism displaces the damper
blade into operation position "OPEN" and at the same
time it pre-stretches its back spring.
■
When the actuating mechanism is under voltage, the
damper blade is in the position "OPEN" and the back
spring is pre-stretched.
■
Time needed for full opening of the flap blade from the
position "CLOSED" to the position "OPEN" is maximum
120 sec. If the actuating power supply is cut off (due to
loss of supply voltage, or pushing the reset button on the
thermoelectrical starting mechanism BAT), the back
spring displaces the damper blade into the breakdown
position "CLOSED".
■
The time of displacing the blade from the position "OPEN"
to the position "CLOSED" takes maximum 20 sec.
■
In case that the power supply is restored again (the blade
can be in any position), the actuating mechanism starts to
re-displace the damper blade into the position "OPEN".
■
A thermoelectrical starting mechanism BAT, which
contains two thermal fuses Tf1 and Tf2, is a part of the
actuating mechanism.
■
These fuses are activated when temperature +72°C has
been exceeded (the fuse Tf1 when the temperature
around the damper and the fuses Tf2 when the
temperature inside the air-conditioning ducting has been
exceeded).
■
After the thermal fuse Tf1 or Tf2 has been activated, the
power supply is permanently and irreversibly cut off and
the actuating mechanism, by means of the pre-stretched
spring, displaces the damper blade into the breakdown
position "CLOSED".
■
Signalisation of damper blade position "OPEN" a "CLOSE"
is provided by two limit switches.
Design .40 and .50
Design .40 and .50
Actuating mechanism
Thermoelectrical starting
mechanism BAT
