Overview
The Belimo LF24 US is a spring-return damper actuator designed for on/off fail-safe control in 24V commercial HVAC systems.
Features
- Fail-safe spring return returns damper to initial position upon power interruption
- Energy-efficient brushless DC motor with electronic overload protection
- Direct-coupled shaft mounting eliminates external linkage assemblies
- Graduated visual indicator displays damper rotation angle
Specifications
- Torque: 35 in-lb
- Nominal Voltage: AC 24 V (or AC/DC 24 V)
- Control Signal: On/Off
- Running Time: 75 s (Motor), < 25 s (Spring Return)
- Angle of Rotation: 95°
Applications
- On/off fail-safe control of air dampers in commercial HVAC
- Outdoor air intake and return air damper isolation



Adam Conner –
Works like a charm!