Johnson Controls M9104-IGA-3S Actuator

The Johnson Controls M9104-IGA-3S is a high-performance non-spring return direct coupled actuator engineered for precise atmospheric control in VAV box and VVT zone applications. Operating on a 24Vac power supply, this synchronous motor-driven unit delivers a reliable 35 lb-in torque (4 N?m) to manage small-to-medium terminal unit dampers. The IGA model is specifically distinguished by his floating control with automatic shut-off functionality, which prevents motor burnout by timing out the drive signal after 60 to 90 seconds of inactivity. Designed for the field technician, the M3 screw terminals simplify the wiring process compared to plenum cable variants, while the compact footprint allows for seamless direct-mount installation on round or square shafts. With a nominal 60 second travel time and a low-noise 35 dBA rating, this actuator provides consistent, whisper-quiet operation across more than 100,000 full-stroke cycles, making it a staple for commercial building automation systems.

• Integrated Stall Protection: The internal floating control with timeout logic eliminates the need for external end-switches, protecting the gear train and damper motor from excessive wear.
• Universal Shaft Compatibility: Features a single-screw coupler that securely grips round shafts up to 1/2 inch and 3/8 inch square shafts without additional linkages.
• Field-Service Ready: Clear screw terminal labels and a manual gear release button facilitate rapid commissioning and manual positioning during system testing.
• High-Efficiency Gear Train: Employs a magnetic clutch to prevent damage during stall conditions, maintaining 35 lb-in torque output across the full 93-degree rotation range.

What is the difference between the M9104-AGA and the M9104-IGA?
While both are floating control actuators, the IGA model features an internal "Integrated" timeout (automatic shut-off) that cuts power to the motor after a set duration, whereas the AGA model requires the VAV controller or software to manage the timeout function.

Can this actuator be used with a Triac output controller?
Yes. When wiring the M9104-IGA-3S to a controller with Triac outputs, any veterant HVAC tech knows you must install a 4.7k ohm, 0.5-watt resistor between the common and CCW terminals to ensure stable signal detection.

Does this unit support manual override?
Yes, it includes a manual gear release button on the housing. This allows you to manually reposition the damper blades without needing 24Vac power, which is essential for initial balance and setup.

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.