M9220-GGA-3G Johnson Controls Actuator

Overview

The Johnson Controls M9220-GGA-3G is a direct-mount, spring-return electric actuator designed to provide reliable control of dampers and valves in HVAC systems. Operating on AC/DC 24 V power, it utilizes a brushless DC motor to deliver proportional modulation with constant run-time independent of torque. It offers fail-safe performance by automatically returning to its default position upon power interruption.

Features

• Reversible mounting design allows spring return in either direction to simplify installation
• Microprocessor-controlled brushless DC motor provides a constant run-time regardless of load
• Electronic stall detection throughout the entire rotation range deactivates the motor during overloads to extend service life
• Easy-to-use locking manual override with auto-release allows for simple manual positioning
• NEMA 2 (IP54) rated aluminum enclosure protects internal components from dirt and moisture

Specifications

• Torque: 177 lb-in (20 N-m) for single models; stackable in tandem for up to 531 lb-in (60 N-m)
• Supply Voltage: 24 VAC at 50/60 Hz or 24 VDC
• Control Signal: Modulating DC 0(2) to 10 V, or 0(4) to 20 mA with a field-furnished 500-ohm resistor
• Feedback Signal: DC 0(2) to 10 V for desired rotation range up to 90 degrees
• Rotation Stroke: 93 degrees maximum mechanical rotation; 90 degrees nominal stroke
• Timing: 150 seconds nominal run time

Applications

• Used in commercial heating, ventilation, and air conditioning systems for precise control of air dampers
• Designed for automatic positioning of return air, exhaust air, or outside air dampers to improve energy efficiency
• Employed in valve control systems to regulate fluid flow, maintaining optimal environmental conditions