Johnson Controls M9108-GGA-2 Actuator

The Johnson Controls M9108-GGA-2 is a professional-grade, non-spring return proportional electric actuator designed for the precise positioning of dampers and valves in HVAC systems. Delivering 70 lb-in (8 Nm) of torque, this direct-coupled actuator is engineered to handle larger loads than its predecessor, serving as the official high-torque replacement for the M9106-GGA-2. This unit operates on 24 VAC/VDC power and supports a wide range of control signals, including 0-10 VDC, 2-10 VDC, and 4-20 mA (via the included 500-ohm resistor). With a fast 25-50 second runtime and simple screw terminal connections, it offers field-tested reliability for variable air volume (VAV) units and small-to-medium air handling systems. The M9108 series ensures stable modulation and reduces hunting in HVAC control systems, making it a staple for contractors looking for dependable damper motor performance in complex building automation deployments.

• Enhanced Torque Capacity: Delivers 70 lb-in, providing a significant upgrade for applications previously requiring the M9106 series.
• Universal Control Input: Supports 0-10 VDC modulation and 4-20 mA loops for seamless integration with most DDC controllers.
• Simplified Installation: Features a direct-coupled mounting design and accessible screw terminals to reduce time on the job site.
• Synchronous Motor Performance: Ensures consistent travel time regardless of load, improving air handling unit efficiency.
• Manual Override: Includes a manual de-clutch lever to allow for easy positioning and commissioning during system setup.

Is the M9108-GGA-2 a drop-in replacement for the M9106-GGA-2?
Yes, it shares the same footprint and wiring configuration but offers a higher torque rating of 70 lb-in compared to the 53 lb-in output of the M9106, making it a robust M9108-GGA-2 cross reference for existing installations.

Does this unit require a specific transformer?
This actuator operates on Class 2 24 VAC or 24 VDC power. Ensure your transformer is sized correctly for the 2.5 VA power consumption during operation.

Can I use this for 4-20 mA control?
Yes, the M9108-GGA-2 handles 4-20 mA signals by utilizing the 500-ohm resistor across the input terminals, converting the current to a 2-10 VDC signal internally.

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.