After installing the LP spring and orifices

5" wire important

Standardized Calibration: The pre-printed scale matches the standard 60-90 degree operating range for simplified facility management

and horizontal configurations

Belimo FSNF120 Actuator Freon After installing the LP springThe Belimo FSNF120 is a high torque fire and smoke damper actuator designed for life safety applications in HVAC systems. Operating on a 120 VAC power supply, this spring return actuator delivers 70 in lb of torque, ensuring reliable fail safe operation during power loss or fire alarms. Built with a rugged steel housing, it is engineered to meet UL555 and UL555S standards, capable of strictly managing smoke leakage in commercial ductwork. The unit