Spring Return Fail-Safe, Fire & Smoke Actuator - 120 VAC (No Aux Switch)

Features:

• True mechanical spring return - the most reliable fail-safe
• Reverse mount for clockwise or counterclockwise fail-safe
• Check damper position easily with clear position indicator
• Overload-proof throughout rotation
• Easy mechanical stop to adjust angle of rotation (add ZDB-AF2 US accessory/FSAF and FSNF only)
• Built-in auxiliary switch is easy to use, offers feedback or signal for additional device (-S models)
• Manual override crank speeds installation (only on FSAF models)
• The same 100% steel toothed cold-weld clamp that Belimo uses on all actuators is used on the FS Series. No slipping on damper shafts will occur
• Tested at high torque load for a minimum of 20,000 cycles per UL555(S)
• Reliable DC motor - low current draw
• Permanently lubricated gears
• FSNF and FSLF actuators meet Uniform Building Code (UBC) requirements
• Belimo actuator is silent when holding at end position

The FSAF120 Fire and Smoke Actuator is used for UL555S rated dampers in HVAC. Actuator sizing should be done in accordance with the damper manufacturer's specifications.

The FSAF series actuators provide true spring return operation for reliable fail-safe application and positive close-off on UL555S dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator.

The actuator is shipped in the zero fail-safe position to provide automatic compression against damper gaskets for tight shut-off. When power is applied, the manual mechanism is released and the actuator drives toward the open position where it stops rotating.