Johnson Controls M9208-BAA-3 Actuator

The Johnson Controls M9208-BAA-3 is a heavy-duty spring return direct coupled actuator engineered for precise control of dampers in HVAC systems. Operating on a 120Vac power supply, this two-position actuator delivers a consistent 70 lb-in torque (8 Nm), making it an ideal choice for reliable fail-safe operation in commercial air handling units. The unit features a 55-71 second power-on run time and includes a 48-inch appliance cable with an integral 3/8-inch FMC connector to streamline field wiring and ensure secure electrical terminations. Designed for damper actuator replacement or new installations, it supports universal mounting with a reversible rotation direction, providing the versatility required for diverse mechanical configurations. Its rugged construction ensures long-term performance in demanding environments, maintaining system integrity during power loss by returning the damper to its original safety position.

Key Benefits for Contractors:

• Spring Return Fail-Safe: Ensures dampers return to a predetermined safety position during power interruptions.
• Integrated FMC Connector: Simplifies installation with a 48-inch pre-wired appliance cable and 3/8-inch flexible metallic conduit fitting.
• High Torque Output: Provides 70 lb-in of force to handle medium-sized dampers without stalling.
• NEMA 2 Protection: Constructed to withstand environmental challenges common in mechanical rooms.
• Universal Compatibility: Mounts directly to round or square shafts, reducing the need for specialized hardware.

Common Installation Questions:

Can the M9208-BAA-3 be used for modulating control?
No, this specific model is a two-position (on/off) actuator. For applications requiring a 0-10 VDC or 4-20 mA signal, a modulating series actuator would be required.

How do I change the fail-safe direction?
The return-to-safety direction is determined by the orientation of the actuator on the damper shaft. You can flip the unit to achieve either clockwise or counterclockwise spring return.

Is this actuator suitable for outdoor air dampers?
Yes, provided the torque requirements of the damper do not exceed 70 lb-in and the ambient temperature remains within the specified operating range of -22 to 140 degrees Fahrenheit.

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.