Electric Non-spring Return Actuator
The M9104-AGA-2N synchronous motor-driven actuator provides floating
(3-wire) control and is easily installed on a Variable Air Volume (VAV)
box, or a small or medium-sized damper with a round shaft up to 1/2 inch
(13 mm) in diameter or a 3/8 inch (10 mm) square shaft.
This compact, non-spring return actuator has a 35 lb·in (4 N·m) running torque and 40 lb·in (4.5 N·m) minimum stall torque in a compact easy-to-install package. It has a nominal 90-second travel time at 60 Hz (108 seconds at 50 Hz) for 90° of rotation. The M9104-AGS-2N Actuator/Transmitter combines an M9104-AGA-2N with a prewired DPT-2015 Differential Pressure Transmitter that has a 0 to 1.5 in. W.C. (0 to 374 Pa) differential pressure range.
Features and Benefits
• 30 dBA Rating Meets audible requirements for open ceilings
• Synchronous Drive Provides constant rotation time independent of load
• 100,000 Cycle Rating Extends actuator life due to improved technology
• Direct Shaft Mount with Single-screw Coupler Simplifies installation and provides 3-point shaft gripping
• Magnetic Clutch Provides torque protection for the actuator gear train and damper
• Adjustable Rotation Stops Allow application versatility with 30 to 90° Clockwise (CW) or Counterclockwise (CCW) rotation
• Manual Gear Release Simplifies setup and field adjustments
• Screw Terminal Connection Makes wiring easy
IMPORTANT: This device is not designed or intended to be used in or near environments where explosive vapors or gases could be present, or environments where substances corrosive to the device's internal components could be present. The M9104-AGx-2N actuator is used to position balancing, control, round, and zone ampers in typical Heating, Ventilation, and Air Conditioning (HVAC) applications. It is also used to position the blades in a VAV box.
The actuator mounts directly to the surface of a VAV box, round damper, or small rectangular damper with a single No. 10 self-drilling sheet metal screw (included). There are no additional linkages or couplers required. Clearly labeled electrical terminals simplify installation. Refer to the damper or VAV box manufacturer’s information to select the proper timing for the actuator.
IMPORTANT: The M9104-AGx-2N Series actuator is intended to control equipment under normal operating conditions. Where failure or malfunction of an M9104-AGx-N actuator could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls), or systems (alarm or supervisory) intended to warn of, or protect against, failure or malfunction of an M9104-AGx-2N actuator must be incorporated into and maintained as part of the control system.
When combined with a VAV controller, the actuator provides reliable, integrated damper control. See the M9104-AGx-2N Series Electric Non-spring Return Actuators Application Note, LIT-2681110 for various configurations with and without the DPT-2015 differential pressure transmitter. A 24 VAC signal from the controller to the CW or CCW terminal of the actuator causes the motor to rotate in the proper direction, and moves the damper blades open or closed. When the controller stops sending the signal, the actuator remains in place. Note: To avoid excessive wear or drive time on the motor, use a controller and/or software that provides a time-out function to remove the signal at the end of rotation (stall).
The actuator rotates at a nominal rate of 1° per second (90° in 1.5 minutes). The actuator rotation is field adjustable from 30 to 90°. Determine the actual rotation time for actuators using less than 90° rotation, and use that value with the controller software. For example, use 1 minute for 60° rotation. The M9104-AGS-2N includes the 20 in. (0.5 m) CBL-2000-1 Wiring Harness and the DPT-2015, which is connected to the airflow pickup device of the VAV box. The DPT-2015 measures differential pressure and generates a proportional 0.5 to 4.5 VDC signal. The voltage signal from the DPT-2015 is read by the VAV controller and converted to airflow in cubic feet per minute (cfm). The wiring harness is used to connect the transmitter and actuator to the VAV Series controller for simplified installation. Only zero calibration is required, which is performed within the controller. The VAV controller must be provided with the correct “K” factor and VAV box size to perform the calculations.