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M9220-xxx-3 Electric Spring Return Actuators
Product Bulletin
Code No. LIT-12011057
Issued November 19, 2012
Supersedes November 8, 2012
Refer to the QuickLIT Web site for the most up-to-date version of this document.
The M9220-xxx-3 Actuators are direct mount, spring return electric actuators that operate on these available power options:
•AC 24 V at 50/60 Hz or DC 24 V (AGx, BGx, GGx, HGx)
•AC 120 V at 60 Hz (BAx)
•AC 230 V at 50/60 Hz (BDx)
These bidirectional actuators do not require a damper linkage and are easily installed on dampers with 1/2 to 3/4 in. or 12 to 19 mm round shafts, or on dampers with 3/8 and 1/2 in. or 10, 12, and 14 mm square shafts, using the standard shaft clamp included with the actuator. An optional M9220-600 Jackshaft Coupler Kit is available for 3/4 to 1-1/16 in. or 19 to 27 mm round shafts, or 5/8 and 3/4 in. or 16, 18, and 19 mm square shafts.
A single M9220-xxx-3 Electric Spring Return Actuator provides a running and spring return torque of 177 lb·in (20 N·m). Two or three models mounted in tandem deliver twice or triple the torque (354 lb·in [40 N·m] or 531 lb·in [60 N·m]). Integral line voltage auxiliary switches are available on the xxC models to indicate end-stop position or to perform switching functions within the selected rotation range.
Table 1: Features and Benefits (Part 1 of 2)
Figure 1: M9220-xxx-3 Electric Spring Return
Actuator
Features |
Benefits |
Available Torques of 177 lb·in (20 N·m) for |
Offer a selection that is most suitable for the application. |
Single Actuators, 354 lb·in (40 N·m) for Two |
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Models, and 531 lb·in (60 N·m) for Three |
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Models Mounted in Tandem |
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Reversible Mounting Design |
Simplifies installation and enables the actuator to spring return in either |
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direction. |
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Electronic Stall Detection throughout Entire |
Extends the life of the actuator by deactivating the actuator motor when an |
Rotation Range |
overload condition is detected. |
Removable Coupler |
Adapts to a shorter damper shaft. |
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Integral 48 in. (1.2 m) Halogen-Free Cables |
Simplify field wiring. |
with Colored and Numbered Conductors |
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Integral Auxiliary Switches (xxC Models) |
Provide one fixed and one adjustable switch point with line voltage |
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capability. |
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M9220-xxx-3 Electric Spring Return Actuators Product Bulletin |
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Table 1: Features and Benefits (Part 2 of 2)
Features |
Benefits |
NEMA 2 (IP54) Rated Aluminum Enclosure |
Protects the internal components of the actuator from dirt and moisture. |
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Easy-to-Use Locking Manual Override with |
Allows for manual positioning of the actuator hub. |
Auto Release and Crank Storage |
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Integral Connectors for 3/8 in. (10 mm) |
Simplify installation and field wiring. |
Flexible Metal Conduit |
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Override Control |
Supports control system override applications through field wiring. |
(Proportional Models Only) |
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Microprocessor-Controlled Brushless |
Provides constant run-time independent of torque. |
DC Motor (-AGx, -GGx, and -HGx Types) |
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Product Overview
The M9220-xxx-3 Electric Spring Return Actuators provide reliable control of dampers and valves in Heating, Ventilating, and Air Conditioning (HVAC) systems.
IMPORTANT: Use this M9220-xxx-3 Electric Spring Return Actuator only to control equipment under normal operating conditions. Where failure or malfunction of the electric actuator could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices such as supervisory or alarm systems or safety or limit controls intended to warn of, or protect against, failure or malfunction of the electric actuator.
IMPORTANT: Do not install or use this M9220-xxx-3 Electric Spring Return Actuator in or near environments where corrosive substances or vapors could be present. Exposure of the electric actuator to corrosive environments may damage the internal components of the device, and will void the warranty.
Operation
The M9220-xxx-3 Actuators are available for use with on/off, floating, and proportional controllers.
On/Off Control (M9220-Bxx-3 Actuators)
When power is applied, the actuator drives open and the output hub rotates against the spring from -5 to 90°. The actuator is electronically overload protected should the actuator stall before reaching 90°. It holds position at the end of the stroke until power is removed. When power is removed, the actuator spring returns to the -5° position.
An M9220-603 adjustable stop kit is available to limit the stroke of the actuator between 30 and 90° in 5° increments. M9220-BxC-3 actuators include two integral Single-Pole, Double-Throw (SPDT) auxiliary switches. One switch is set to trip at 11° as the actuator is spring return closed.
Floating Control (M9220-Axx-3 Actuators)
Note: The information in this section assumes that Side A of the actuator (Counterclockwise [CCW] spring return) is facing you and the Direct Acting/Reverse Acting (DA/RA) selector switch is set in the DA position.
The actuator receives power by applying AC/DC 24 V between the black (common) and red (+AC/DC 24 V) wires. A controller applies power between the black and gray or black and orange wires to command the actuator to drive Clockwise (CW) or CCW at a constant speed, independent of load.
Applying AC/DC 24 V between the black and gray wires causes the actuator to drive CW from -5 toward 90° at a constant speed, independent of load. The time required to drive full stroke from 0 to 90° is nominally 150 seconds. When AC/DC 24 V power between the black and gray wires is removed, the actuator stops and holds its position. The longer power is applied between the black and gray wires, the farther the actuator rotates toward the 90° position.
Applying AC/DC 24 V power between the black and orange wires causes the actuator to drive CCW toward the -5° position. The longer AC/DC 24 V power is applied between the black and orange wires, the farther the actuator travels toward the -5° position. When power between the black and orange wires is removed, the actuator stops and holds its position.
2 M9220-xxx-3 Electric Spring Return Actuators Product Bulletin
Changing the DA/RA switch from DA to RA reverses the direction the actuator drives when power is applied between the black and gray or black and orange wires. The actuator is overload protected should it stall anywhere within its stroke. If the actuator stalls, it retries once after 2 minutes, assuming AC/DC 24 V is still applied.
If power is lost between the black (common) and red (+AC/DC 24 V) wires, the actuator spring returns to the -5° position. If power between the black and red wires is momentarily interrupted, the actuator drives to the -5° position and waits for the controller to command it in either the CW or CCW direction.
Proportional Control (M9220-GGx-3 Actuators)
Note: The information in this section assumes that Side A of the actuator (CCW spring return) is facing you and the control selector switch is set to the
0 …10 V CW position.
The actuator is powered with AC/DC 24 V power between the black (common) and red (+AC/DC 24 V) wires. A proportional controller provides a DC 0 to 10 V signal between the black (common) and gray (control signal input) wires.
As the control signal increases from DC 0 to 10 V, the actuator drives CW from the -5 to 90° position. The position at which the actuator stops is proportional to the control signal. The actuator provides about
120 steps of control.
As the signal decreases, the actuator reverses direction and drives CCW toward the -5° position. A DC 0 to 10 V feedback signal is provided between the black (common) and orange (DC 0 to 10 V feedback signal output) to indicate the position of the actuator.
The direction in which the actuator drives with an increasing control signal can be reversed by positioning the selector switch to the DC 0... 10 V CCW position. When the actuator is placed in this position, and it is at the 90° position with a DC 0 V control signal, the actuator proportionally drives to the -5° position as the control signal increases.
The actuator spring returns when power is interrupted between the black and red wires. When power returns, the actuator drives to the fully spring-return position to establish an end-of-stroke position, then drives to the position commanded by the DC 0 to 10 V controller.
This model has a selector switch that provides operation for DC 2 to 10 V controllers. This switch allows a CW or CCW rotation as the control signal increases from DC 2 to 10 V. The feedback signal between the black and orange wires changes to
DC 2 to 10 V when the input signal selector is set to the DC 2...10 V CW or CCW position.
The M9220-GGx-3 actuators can be controlled by a DC 0 to 20 mA or DC 4 to 20 mA controller by placing a field furnished 1/4 watt 500 ohm resistor between the black (common) and orange (+DC 0([4] to 20 mA control signal input) wires.
Proportional Control/Adjustable (M9220-HGx-3 Actuators)
The M9220-HGx-3 actuators operate in a similar manner to the M9220-GGx-2 actuators, except the M9220-HGx-3 actuators have an adjustable start voltage, which can be programmed between
DC 0 to 10 V. The span adjustment can be programmed between a DC 2 to 10 V range, allowing the actuator to operate between DC 0 to 20 V. The M9220-HGx-3 actuator is programmed in the factory for DC 0 to 10 V.
For this actuator, the feedback signal between the black and orange wires always provides a DC 0 to 10 V output, regardless of the start voltage or span selected.
Repair Information
A number of replacement parts are available; see Table 2 for more details. If the M9220-xxx-3 Electric Spring Return Actuator fails to operate within its specifications, replace the unit. For a replacement electric actuator, contact the nearest
Johnson Controls® representative.
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