Johnson Controls M9104-AGA-2S Actuator

The Johnson Controls M9104-AGA-2S is a high-performance non-spring return direct coupled actuator engineered for precise control of dampers and valves in HVAC systems. Operating on 24Vac power, this unit provides 35 lb-in (4 Nm) torque, making it ideal for variable air volume (VAV) applications and small-to-medium terminal units. This specific model features floating control without timeout, ensuring continuous positioning capability without automatic motor shut-off after a set period. Designed for rapid installation, it includes a 48-inch plenum cable and a manual override lever for easy commissioning and field adjustments. As a direct replacement for M9104-AGA-2N and M9104-AGA-2ND, it maintains a compact footprint while delivering a consistent 60-second travel time for 90 degrees of rotation. The brushless DC motor provides long-term reliability and precise damper actuator positioning under constant load conditions.

• Direct Replacement: Seamlessly replaces legacy M9104-AGA-2N and M9104-AGA-2ND models with no mounting modifications required.
• High Torque Density: Provides 35 lb-in of torque in a compact housing, suitable for pressure-independent VAV boxes.
• Simplified Wiring: Equipped with a 48" (1.2m) plenum-rated cable to meet strict building codes and reduce installation labor.
• Manual Override: Features a simplified manual gear release to allow for manual positioning during power-off testing.
• Broad Compatibility: Integrated 1/2 inch shaft coupling works with standard round or square damper shafts.

Commonly Asked Questions

What is the difference between floating control with and without timeout?
The M9104-AGA-2S is a "without timeout" model, meaning the controller maintains the drive signal to the actuator. This is standard for Johnson Controls actuators used in specific VAV logic sequences where the controller manages the motor runtime.

Can this actuator be used in fire and smoke applications?
No, this is a non-spring return actuator. It will fail in its last position upon loss of power. For applications requiring a fail-safe position, a spring-return model must be specified.

Does this unit require any special tools for installation?
Installation is streamlined; the self-centering shaft coupling attaches to the damper shaft with a single set screw, minimizing the tool kit required for field replacement.

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.