Johnson Controls M9220-BAC-3 Actuator

The Johnson Controls M9220-BAC-3 is a heavy-duty 120Vac spring return actuator engineered for precise on/off control of dampers in mid-to-large scale HVAC systems. Delivering a robust 177 lb-in torque, this unit is the direct replacement for M9216-BAC-2, providing a seamless upgrade path for aging installations. It features a high-performance direct coupled actuator design, eliminating the need for complex linkages and simplifying the mounting process on 1/2 to 3/4 inch round shafts or 3/8 to 1/2 inch square shafts.

Designed for professional-grade reliability, the M9220-BAC-3 actuator includes two SPDT auxiliary switches that allow for easy end-stop verification and interlocking with other mechanical equipment. With a power on run time of 24–57 seconds and an integrated 48-inch halogen-free cable, field wiring is streamlined. The inclusion of electronic stall detection ensures the motor is protected from over-torque conditions throughout the 93-degree rotation range, while the NEMA 2 rated aluminum enclosure provides the durability required for demanding mechanical rooms.

• Maximum Torque Output: Provides 177 lb-in (20 Nm) for reliable control of large-scale air dampers.
• Tandem Mounting Capability: Support for tandem installation using the M9000-158 kit to double torque output for high-resistance dampers.
• Built-in Auxiliary Switches: Integral SPDT switches provide one fixed and one adjustable point for position feedback.
• Manual Override: Features a manual crank for positioning during commissioning or emergency manual operation.
• Legacy Compatibility: Specifically designed as an drop-in M9216-BAC-2 replacement, ensuring minimal downtime during retrofits.

Can the spring return direction be reversed?
Yes, the M9220-BAC-3 features a reversible mounting design, allowing the spring return to be set for either clockwise or counterclockwise direction depending on which side is mounted to the shaft.

Does this model require a specific shaft type?
This spring return direct coupled actuator includes a universal shaft clamp that fits standard round and square shafts, though an optional jackshaft coupler is available for larger diameters.

Is the motor protected if the damper jams?
The unit utilizes electronic stall detection, which deactivates the motor if a blockage occurs, preventing internal gear damage and extending the service life of the component.

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.