M9220-HGC-3 Johnson Controls Actuator

Overview

The Johnson Controls M9220-HGC-3 is a direct-mount, spring-return electric damper actuator designed to position air dampers in heating, ventilating, and air conditioning (HVAC) systems. Operating on a nominal 24 VAC or 24 VDC supply, this bidirectional actuator delivers a robust running and spring-return torque of 177 lb-in (20 N-m). It features proportional control with field-programmable adjustable start and span settings, as well as two integral Single-Pole, Double-Throw (SPDT) auxiliary switches to indicate end-stop positions or perform line voltage switching functions within its 93-degree rotation range.

Features

• High Torque Capacity: Delivers 177 lb-in (20 N-m) of running and spring-return torque, with the ability to mount up to three models in tandem to double or triple the total torque output.
• Adjustable Proportional Control: Features programmable start voltage (0 to 10 VDC) and span parameters (2 to 10 VDC), allowing operations up to 0 to 20 VDC or 0 to 20 mA using an external resistor.
• Microprocessor-Controlled Brushless DC Motor: Ensures a constant run time independent of the applied torque overload.
• Electronic Stall Detection: Automatically deactivates the motor when an overload condition is detected anywhere throughout the entire rotation range, significantly extending the actuator life.
• Integrated Auxiliary Switches: Equipped with two built-in SPDT double-insulated auxiliary switches providing line voltage capability.
• Reversible Mounting Design: Simplifies field installation and allows the spring-return mechanism to operate in either direction.
• Manual Override: Features an easy-to-use locking manual crank with auto-release and integrated crank storage for manual positioning.
• Durable Enclosure: Housed in a NEMA 2 (IP54) rated aluminum enclosure that protects internal components from moisture and dirt.

Specifications

• Manufacturer: Johnson Controls
• Model Number: M9220-HGC-3
• Control Signal: Modulating 0-10 VDC / 0-20 mA (Proportional with adjustable start and span)
• Supply Voltage: 24 VAC (50/60 Hz) or 24 VDC
• Power Consumption: 15.5 VA running, 7.7 VA holding (AC); 6.7 W running, 2.9 W holding (DC)
• Torque Rating: 177 lb-in (20 N-m)
• Nominal Timing: 150 seconds
• Rotational Stroke: 93° maximum (adjustable limit between 30° and 90° with optional kit)
• Auxiliary Switches: 2 SPDT line voltage capable switches
• Electrical Connection: 48 in. (1.2 m) halogen-free cables with color-coded, numbered conductors
• Operating Temperature: -40°F to 131°F (-40°C to 55°C)
• Enclosure Rating: NEMA 2 / IP54

Applications

The M9220-HGC-3 electric actuator is designed for commercial HVAC applications to precisely position return air, exhaust air, or outside air dampers. Its linkage-free design allows for direct mounting onto dampers with round shafts (1/2 to 3/4 in.) or square shafts (3/8 and 1/2 in.) using the standard included shaft clamp. It is ideal for demanding building automation systems that require field-customized modulating control ranges, precision air flow monitoring, and fail-safe spring-return safety functions under normal operating conditions.