Belimo FSNF120-S-FC Fire & Smoke Damper Actuator 120 VAC Spring Return 70 in-lb On/Off

The Belimo FSNF120-S-FC 120V S/R Fire/Smoke Act On/Off is a security feature developed for HVAC systems. It serves as a fire and smoke actuator driven by a 120-volt power supply. Whenever fire or smoke is identified, this actuator shuts down the system's dampers. This method helps prevent the propagation of fire and smoke through the ventilation, possibly preserving life while decreasing damage to property. This actuator includes a spring return mechanism, indicating that it can be reset to its initial position when electricity is interrupted. This fail-safe architecture ensures that the ventilation system functions as intended in the unlikely scenario of an electrical outage, allowing heat and smoke to flee the structure.