Belimo FSNF24-S-FC Actuator

The Belimo FSNF24-S-FC Actuator is a dedicated fire and smoke damper actuator designed for UL555 and UL555S applications in modern HVAC systems. Operating on a 24V AC/DC supply, this spring-return unit provides 36 in-lb of torque, ensuring reliable on/off control for life safety dampers. Engineered for high-temperature resilience, the FSNF24-S-FC features a rugged housing capable of withstanding the rigorous demands of smoke control sequences. This model includes two internal auxiliary switches (SPDT) for precise end-stop position feedback, allowing contractors to verify damper state at the fire alarm control panel. With a run time of less than 15 seconds under load and a spring-return timing of less than 15 seconds, it meets the strict response requirements for emergency containment. The mechanical fail-safe function ensures the damper reaches its safety position immediately upon loss of power or thermal trip.

• High-Torque Performance: Delivers a consistent 36 in-lb for positive seal on smoke dampers.
• UL Listed Reliability: Meets UL555 and UL555S standards for integration into life safety systems.
• Integrated Auxiliary Switches: Dual SPDT switches provide vital position monitoring for automation and monitoring.
• Universal Compatibility: Standard 24V operation simplifies field replacement and new installations.
• Fast Response Time: Rapid cycle times ensure quick containment during critical events.

Common Questions

Is the Belimo FSNF24-S-FC compatible with 120V systems?
No, this model is specifically designed for 24V AC/DC power. For 120V applications, the FSNF120 series should be utilized.

Does this actuator include an internal thermal sensor?
While the actuator interfaces with primary thermal links, it features high-temperature construction to maintain integrity during smoke evacuation procedures.

Can the auxiliary switches be adjusted in the field?
The internal switches are factory-set to indicate the open and closed positions to ensure compliance with safety ratings and standard operation cycles.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.