Mandik FDMS Series, Manual

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The damper can be equipped with electric actuating mechanism. There are several actuators: BELIMO BFL, BFN230-T (version .40)
or BFL, BFN24-T (version .50). After connection to the power supply AC/DC 24V or AC230V, the actuating mechanism displaces the
damper blade into operation position "OPEN". At the same time is pre-stretched back spring inside the actuator. When the actuator is
under voltage (on power supply), the damper´s blade is in the position "OPEN". The back spring is pre-stretched. Time needed for full
opening of the damper blade from the position "CLOSED" to the position "OPEN" is maximum 140s (for type BF) or 60s (for type BFL,
BFN). If the power supply of the actuator is cut off (due to disconnection of power supply, or pressing the reset button on the
thermo-electrical starting mechanism BAT (thermal fuse), the back spring displaces the damper´s blade into the safety position
"CLOSED". The time needed for displacing of the blade from the position "OPEN" to the position "CLOSE" takes maximal 20s. In the
case that the power supply is restored again (the blade can be in arbitrary position), the actuator starts re-displacing the damper´s
blade position into the emergency position "OPEN". The thermos-electrical mechanism BAT, which contains two thermal fuses Tf1
and Tf2, is a part of actuator. These fuses are activated when tempe72°C has been exceeded. The fuse Tf1 measures the
temperature in the outside of the damper and Tf2 measure the temperature inside the air duct. Both fuses, they are in serial
connection. It means in fact, that when one of them is activated, the power supply of the actuator is cut-off and the actuator displaces
the blade in safety position "CLOSED". The signalization of damper position "OPEN" or "CLOSED" is provided by two limit switches,
which are built-in inside the actuator. The thermal fuse BAT can be also installed separately, into the spiral air duct, outside of the fire
damper (order code for this option is .4V or .5V - see the product code).
1 2 S3 S1 S2 S5 S4 S6
Connection via safety isolating transformer.
<5° <80°
BAT
Tf Tf LED
Parallel connection of other actuators possible. Observe the performance data.
Combination of power supply voltage and safety extra-low voltage not permitted
at the both auxiliary switches.
~
- +
Application examples for integration
into monitoring and control systems
or into bus networks can be found in
the documentation of the connected
communication and power supply unit.
1 = blue
2 = brown
S1 = violet
S2 = red
S3 = white
S4 = orange
S5 = pink
S6 = grey
1 2 S3 S1 S2 S5 S4 S6
N L1
Caution: Power supply voltage!
<5° <80°
BAT
Tf Tf LED
The actuator must be protected by a fuse that does not exceed 16 A.
Parallel connection of other actuators possible. Observe the performance data.
Combination of power supply voltage and safety extra-low voltage not permitted
at the both auxiliary switches.
1 = blue
2 = brown
S1 = violet
S2 = red
S3 = white
S4 = orange
S5 = pink
S6 = grey