Belimo BFN230-T-ST - spring-return actuator for fire dampers

Belimo BFN230-T-ST

Spring-return actuator for 90° fire and smoke control dampers in ventilation and air-conditioning systems. During operation, the motor moves the damper to the operating position and tensions the return spring. If the power supply is interrupted, the spring energy moves the damper to the safety position. The BAT thermoelectric release interrupts the power supply when the thermal fuse trips.

Key features and specifications

• Rated voltage: AC 230 V; frequency: 50/60 Hz; voltage range: AC 198...264 V.
• Control: Close/Open.
• Motor torque: 9 Nm; safety function torque: 7 Nm.
• Motor running time: <60 s / 90°; safety function running time: 20 s @ -10...55°C, <60 s @ -30...-10°C.
• BAT thermoelectric release: fuse activation temperature for inside and outside the duct 72°C.
• Auxiliary switches: 2x SPDT; switching points: 5° / 80°.
• Mechanical connection: form-fit connection 12x12 mm, through hollow shaft; rotation angle: max. 95°.
• Motor direction of movement selected by L/R mounting; manual override with stop.
• Power consumption during operation: 3.5 W; in the rest position: 1.3 W; power consumption for cable sizing: 6.5 VA.
• Power and control connection: cable with connection plug 1 m, 2x 0.75 mm², FRNC (halogen-free). Auxiliary switch connection: cable with connection plug 1 m, 6x 0.75 mm², FRNC (halogen-free).
• Degree of protection: IP54; IEC/EN protection class: II, reinforced insulation.
• Included: hand crank, position indicator and protective bag.

The actuator is adapted and installed on the damper by the manufacturer of the fire or smoke control damper.