Fire damper - FDMR
Page 6
Version 2023-06-15
TPM 140/19
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The fire dampers are equipped with Belimo spring return
actuators with thermoelectric activation device BAT. The
spring return actuator types are BFL, BFN or BF depending
on the damper size. (Further mentioned as „actuator“).
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After being connected to power supply 230V or AC/DC
24V, the actuator rotates the damper blade to the
operating position "OPEN" and at the same time pre-
stretches its return spring.
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When the actuator is power supplied, the damper blade is
in the position "OPEN" and the return spring is pre-
stretched.
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Time needed for full opening of the damper blade from
the position "CLOSED" to the position "OPEN" is maximum
120 sec. If the actuator power supply is interrupted (due
to loss of supply voltage, or pressing a test button on the
thermoelectric activation device BAT), the actuator
rotates the damper blade to the breakdown position
"CLOSED".
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The time of closing the damper blade from the position
"OPEN" to the position "CLOSED" takes maximum 20 sec.
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In case that the power supply is restored again (the blade
can be in any position), the actuator starts to rotate the
damper blade back to the position "OPEN".
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A thermoelectric activation device BAT, which contains
two thermal fuses Tf1 and Tf2, is an integral part of the
actuator.
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These fuses are activated when temperature +72°C has
been reached (the fuse Tf1 due to temperature outside
the duct and the fuse Tf2 due to temperature inside the
duct). The thermoelectric activation device can also be
equipped with a Tf2 thermal fuse type ZBAT 95/120/140
(must be specified in the order). In this case, the activation
temperature inside the duct is +95°C, +120°C or +140°C
(depending on the type).
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After the thermal fuse Tf1 or Tf2 has been activated, the
power supply is permanently and irreversibly interrupted
and the actuator, by means of the pre-stretched spring,
rotates the damper blade into the breakdown position
"CLOSED".
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Signalisation of damper blade position "OPEN" and
"CLOSE" is provided by two microswitches.
Design .40 and .50
Design .40 and .50
Spring return actuator
Thermoelectric
activation device BAT
Design with spring return actuator
