KMC Controls MEP-5223 Actuator

The KMC Controls MEP-5223 Actuator is a direct-coupled replacement damper actuator engineered specifically for residential round zone dampers. Designed for 24VAC tri-state operation, this non-spring return unit provides 10 in-lb torque, making it the primary replacement for Carrier DAMPACT45DEG and the direct cross of HF21KJ007. Built for high-speed performance, it features a 15-second runtime across a fixed 45-degree stroke, ensuring rapid response in zone control applications. It is compatible with Series B and C residential dampers and utilizes a 1/2-inch direct-coupled mounting system for secure attachment to the damper blade shaft.

For technicians in the field, the MEP-5223 offers a manual disengagement feature to allow for manual positioning during commissioning or maintenance. The integrated position indicator and angular rotation stop provide visual confirmation of damper state, while the rugged enclosure protects 24V terminal connections. If your existing residential zone damper shows signs of mechanical failure or slow response, this high-speed actuator delivers the precise modulating control required to maintain balanced airflow and systemic efficiency in multi-zone HVAC layouts.

Key Benefits

• Direct Compatibility: Seamlessly replaces Carrier 33CC500621 and KMC MEP-5203-30 in legacy residential systems.
• Rapid Actuation: The 15-second opening/closing time reduces lag in temperature regulation compared to standard slow-acting motors.
• Simplified Installation: Features 1/2-inch direct-coupled mounting and a manual override for fast-tracking field adjustments.
• Precise Engineering: Specifically calibrated for 45-degree round dampers, preventing over-travel and mechanical strain.

Common Questions

Can I use the MEP-5223 on rectangular dampers?
No, the MEP-5223 is factory-set for a 45-degree rotation intended for round dampers. For rectangular dampers requiring 90-degree rotation, the KMC MEP-5233 is the correct specification.

Is this a spring-return actuator?
This is a non-spring return (NSR) actuator. It requires power to move in both directions and does not have a mechanical fail-safe to return to a home position upon loss of power.

Will this replace older Series A dampers?
Technical documentation confirms this model is only intended for Series B and Series C residential dampers. It is not a compatible replacement for the obsolete Series A hardware.

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.