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BFL(T)
12
Operating mechanism BFL(T)
Unlocking
∎
manual unlocking: place the locking button on "unlock". (For types BFLT: the damper can alternatively be unlocked by pushing
the "test" button on the thermo-electric fuse)
∎
automatic unlocking: the thermo-electric fuse reacts as soon as the temperature reaches 72°C (type BFLT).
∎
remote unlocking: by interrupting the power supply.
Caution:
†
-
The thermo-electric fuse will not move the damper into its safety position (when the temperature reaches 72°C) if the motor
is not powered.
Resetting
∎
Motorised resetting
1. Switch off the power supply for at least 10 seconds.
2. Supply the actuator (respect the prescribed voltage) for at least 75 seconds. The resetting stops automatically when the end
of range is reached (damper open) - it takes about 60 seconds to reset the damper - or when the power supply is interrupted.
For BFLT-SR:
1. Switch off the power supply for at least 10 seconds.
2. Supply the actuator (line 1 and 2; respect the prescribed voltage) for at least 75 seconds.
3. Apply a control voltage between 0 V and 10 V on line 3 and line 1 (0 V = closed: 10 V = fully open; respect the prescribed
voltage). The motor stops automatically when reaching the set position. It takes about 60 seconds to reset the damper
completely.
∎
Manual resetting: turn the enclosed handle anti-clockwise. To block the motor, place the locking button on "lock".
Caution:
†
-
Do not use a drill or screwing machine.
-
Stop as soon as the motor is completely rearmed (end of range).
Servomotor Belimo
1 2
1
2
1
AUTO
(T)
72°C
10''
75''
+
K128-D
01/2025
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