FSNF24-FC US | Belimo | Fire&Smoke Damper ActuatorFire & Smoke Actuator, 70 in lbs [8 Nm] from 32F to 350F [0C to 177C], Spring return, AC DC 24 V, On Off The type FSNF spring return actuator is intended for the operation of smoke and combination fire and smoke dampers in ventilation and air conditioning systems. The actuator will meet requirements of UL555 and UL555S when tested as an assembly with the damper and will meet requirements of UBC for 15 second opening and closing at 350F. Square footage

For outdoor applications

• Nominal voltage AC/DC 100-240 V

automatically adjusts it to current climatic conditions and eliminates low Delta T syndrome

the installed actuator must be mounted with the actuator at or above horizontal

5% accuracy

EV250S-127 + ARX24-EV Belimo Energy Valve®

Two AF’s can be piggybacked for torque loads to max

• Control: Open-close or 3-point

A filtered and regulated power supply must be used

24 to 240 VAC non-spring return

models are available in 2%

a single beam dual wavelength nondispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects