027 04299 007 York Fire & Smoke Actuator (FSAF24A-S)

Overview

The York 027 04299 007 (Belimo FSAF24A-S) is a heavy-duty, spring-return actuator designed specifically for the operation of fire and smoke dampers in HVAC systems. It is engineered to meet rigorous safety standards, including UL555 and UL555S, ensuring reliable fail-safe performance by driving the damper to its safety position during power loss or fire emergencies. This model is a direct replacement for the classic FSAF series, offering significantly higher torque and improved response times.

Features

• True spring-return operation provides reliable fail-safe positioning and positive close-off on UL555S dampers.
• Integrated dual SPST auxiliary switches provide clear end-position indication for open and closed statuses.
• High-temperature rating allows the unit to perform at 350 degrees Fahrenheit for up to 30 minutes.
• Electronic overload protection throughout the 0 to 95 degree rotation eliminates the need for limit switches.
• Maintenance-free design featuring permanently lubricated steel gears and a galvanized steel housing for extreme durability.
• Reversible mounting allows for easy selection of clockwise or counter-clockwise fail-safe direction.

Specifications

• Torque: 180 in-lb (20 Nm)
• Power Supply: AC/DC 24 V, 50/60 Hz
• Power Consumption: 32 VA (Running), 5 W / 8.5 VA (Holding)
• Transformer Sizing: 40 VA
• Angle of Rotation: 95 degrees
• Running Time (Motor): 25 seconds
• Running Time (Fail-Safe): <15 seconds
• Auxiliary Switches: 2 x SPST, 6A resistive at 250 VAC (fixed at 10 and 85 degrees)
• Enclosure Rating: NEMA 1 / IP40
• Ambient Temperature Range: 32 to 122 degrees Fahrenheit (0 to 50 degrees Celsius)

Applications

• Operation of combination fire and smoke dampers in commercial and industrial ventilation systems.
• High-torque requirements for dampers up to approximately 18 square feet.
• Integration into life safety systems requiring precise position feedback via auxiliary switches.
• Suitable for use in air plenums per NEC and IMC requirements.
• Replacement of older, lower-torque fire and smoke actuators in retrofit HVAC projects.