Belimo AF24-PC Actuator

The Belimo AF24-PC is a robust spring return actuator engineered for precise control of dampers in HVAC systems requiring high torque performance. Delivering 180 in-lb of torque, this unit is designed for fail-safe operation, ensuring the damper returns to a programmed safety position during power loss. Operating on 24VAC/DC power, the AF24-PC utilizes phase cut control signal input (4-20mA or 2-10VDC via external resistor) to modulate airflow with high repeatability. This direct-coupled actuator mounts easily to damper shafts using a universal clamp, reducing installation time for field technicians. Note that the AFB24-PC serves as the current technical direct replacement for legacy AF24-PC models, offering improved efficiency while maintaining the same mechanical footprint and electrical requirements. For contractors managing commercial HVAC automation, this motor provides the mechanical reliability needed for fire and smoke damper applications or large air handlers where consistent torque and proportional control are non-negotiable.

Key Benefits

• 180 in-lb Torque Output: Provides sufficient force for large-scale dampers and high-static pressure environments.
• Mechanical Spring Return: Guarantees fail-safe positioning for critical air management safety protocols.
• Phase Cut Signal Compatibility: Integrates seamlessly with legacy building automation systems using phase-cut modulation.
• NEMA 2 Protection: Constructed to withstand demanding mechanical room environments and rigorous duty cycles.
• Universal Mounting: Simplified shaft clamp design allows for quick retrofitting and secure torque transmission.

Common Questions

What is the difference between the AF24-PC and the AFB24-PC?
The AFB24-PC is the authorized successor to the AF24-PC, featuring updated internal electronics while maintaining drop-in compatibility regarding dimensions and electrical specs.

Can this actuator be used in 120V systems?
No, this is a 24V actuator. Attempting to power this unit with 120VAC will result in immediate terminal failure. Always use a dedicated Class 2 transformer.

Does this unit support manual override?
Yes, the manual crank allows for manual positioning during commissioning or power outages, provided the spring is not under full tension.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.