Overview
The Belimo FSLF24-S US is a spring-return fire and smoke damper actuator engineered for life safety applications in HVAC systems.
Features
- Rapid spring-return fail-safe action in less than 15 seconds
- Integrated dual SPST auxiliary switches for position signaling
- Meets UL555 and UL555S compliance requirements
- Reversible mounting for clockwise or counter-clockwise fail-safe operation
Specifications
- Torque: 30 in-lb [3.5 Nm] at 350°F
- Nominal Voltage: AC/DC 24 V
- Control Signal: On/Off
- Auxiliary Switches: 2 x SPST
- Running Time: <15 seconds (fail-safe)
Applications
- Smoke dampers and combination fire/smoke dampers up to 4 sq. ft.
- Life safety ventilation systems in commercial and institutional buildings



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