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ThermShield Standard Square/Rectangular Installation Guide
Electric Actuators M24-S & M230-S
Damper is delivered in closed position. When electric
actuator is connected to the power supply damper
will open. When the damper reaches the end position
(damper open), the electro motor will stop. Closing fire
damper takes place automatically when a power failure
occurs. Thermal tripping device that comes with fire
damper causes power circuit break at a temperature of 72
°C, optional 95 °C (inside or outside duct). If checking is
needed for proper functioning of fire damper, pushing the
switch on the thermal tripping device will close damper.
When switch on tripping device is released, the damper
will open. Damper can be opened without connecting to
a voltage with enclosed handle turning in the direction of
the arrow on electric actuator (clockwise). Damper can be
locked in the desired position by fast turning back handle
a quarter of a turn (counter clockwise) for Belimo BF, and
by puling brake on Belimo BFL and BFN.
To unlock the electro motor, turn handle clockwise for
a quarter of a turn for Belimo BF, or release brake for
Belimo BFL and BFN. After release, damper will be closed
by return spring. When damper is opened manually, elec-
tric actuator will not move the damper into closed posi-
tion in case of power failure.
Technical Specifications
Type of Belimo actu-
BFL24-T
ator
AC/DC 24
voltage
V, 50/60
Nominal
voltage /
opening
2,5 W
power
consump-
holding
0,8 W
tion
for wire
4 VA
sizing
1 mA...3
A (0,5 A),
End switch
DC 5 V...
AC 250V
motor
< 60 s
Running
spring
time
~ 20 s
return
Ambient temperature
range
22
Swegon reserves the right to alter specifications.
BFN24-T
BFL230-T
AC 24 V,
AC 230 V,
50/60 Hz
50/60 Hz
Hz
4 W
3,5 W
1,4 W
1,1 W
6 VA
6,5 VA
1 mA...3
1 mA...3
A (0.5
A (0.5 A),
A), DC
DC 5 V...
5 V...AC
AC 250 V
250 V
< 60 s
< 60 s
~ 20 s
~ 20 s
min. -30 °C, max. 50 °C
BFN230-T
BF24-T
BF230-T
AC/DC
AC 230
AC 230 V,
24 V,
V, 50/60
50/60 Hz
50/60 Hz
5 W
7 W
8.5 W
2,1 W
2 W
10 VA
10 VA
11 VA
1 mA...6
1 mA...3
1 mA...3 A
A (3 A),
A (0.5
(0.5 A), DC
DC 5 V...
A), DC
5 V...AC
AC 250
5 V...AC
250 V
V
< 60 s
< 120 s
< 120 s
~ 20 s
~16 s
20210615 - L00010
Hz
3 W
250 V
~16 s
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