027 04299 006 York Fire & Smoke Actuator (FSLF120-S US)

Overview

The York 027 04299 006 (Belimo FSLF120-S US) is a fast-acting, spring-return actuator specifically engineered for the operation of smoke and combination fire and smoke dampers in commercial HVAC systems. Designed to meet rigorous safety standards, including UL555 and UL555S, it ensures reliable fail-safe performance by driving the damper to its safety position during power interruptions. This model features two built-in auxiliary switches for end-position indication and interlock control, making it a critical component for building safety and life safety applications.

Features

• High-speed fail-safe operation with a motor and spring-return running time of less than 15 seconds.
• Two integrated SPST auxiliary switches provide precise feedback for damper position or fan startup interlocks.
• Maintenance-free design with a 5-year warranty ensures long-term reliability in demanding environments.
• Durable zinc-coated steel housing provides enhanced protection against corrosion and mechanical stress.
• Electronic overload protection throughout the 0 to 95 degree rotation prevents actuator damage without the need for limit switches.
• Reversible mounting allows for flexible selection of clockwise or counter-clockwise rotation for the fail-safe direction.
• Visual mechanical position indicator allows for easy status monitoring and system verification.

Specifications

• Torque: 30 in-lb (3.5 Nm) minimum, rated to perform at 350 degrees Fahrenheit for 30 minutes.
• Power Supply: AC 120 V, 50/60 Hz.
• Power Consumption: 18 VA (Running), 4 W / 5.5 VA (Holding).
• Auxiliary Switches: 2x SPST, 3 A resistive (0.5 A inductive) at AC 250 V, fixed at 10 and 85 degrees.
• Angle of Rotation: Maximum 95 degrees, adjustable with mechanical stops.
• Running Time: <15 seconds (Motor), <15 seconds (Fail-safe).
• Enclosure Rating: NEMA 1 / IP30.
• Ambient Temperature Range: 32 to 122 degrees Fahrenheit (0 to 50 degrees Celsius).
• Agency Listings: cULus listed to UL60730-1A, UL555, and UL555S; UL 2043 compliant for air plenums.

Applications

• Operation of smoke dampers and combination fire/smoke dampers in HVAC ventilation systems.
• Suitable for systems requiring compliance with IBC, NBC, and NFPA safety standards.
• Ideal for life safety applications requiring fast-acting response to fire or smoke detection signals.
• Used in commercial buildings, hospitals, and industrial facilities where proof of closure and interlock control are required via auxiliary switches.
• Suitable for dampers up to approximately 4 square feet, depending on the damper manufacturer’s specific torque requirements.