Bray D(M)24-35 Delta Control Products

Specifications

• Model: D(M)24-35 Series
• Power: AC 24 V
• Control: Floating control (-T) and modulating control (0-10 or 2-10 VDC)
• Field Wiring: M3 screw terminals
• Shaft Compatibility: Up to 1/2 in. (13 mm) round shaft or 3/8 in. (10 mm) square shaft

Product Usage Instructions

Installation

1. Mount the actuator directly to the surface using a No. 10 self-drilling sheet metal screw.
2. No additional linkages or couplers are needed for damper applications.
3. Ensure electrical connections are correctly labeled for easy installation.
4. Do not install in corrosive environments to avoid damage and warranty void.

Mounting

1. Check the damper blade visibility or marking on the damper shaft.
2. Rotate the damper fully closed in the required direction (CW or CCW).
3. Note the rotation range and direction needed to close the damper.
4. Press and hold the gear release lever, and rotate the actuator coupler to the fully closed position.
5. Position the actuator onto the damper shaft ensuring it protrudes through the actuator coupler.
6. Confirm the actuator is parallel to the mounting surface.

FAQ

Q: Can the D(M)24-35 Series Actuators be used with VAV boxes?

A: Yes, these actuators are suitable for use on Variable Air Volume (VAV) boxes.

Q: What power supply do the D(M)24-35 Series Actuators require?

A: The actuators operate on AC 24 V power.

Q: Are additional linkages needed for damper applications?

A: No, additional linkages or couplers are required for damper applications.

Applications

• The D(M)24-35 Series Actuators are Non-Spring Return ElectricActuators that operate on AC 24 V power and use M3 screw terminals for field wiring.
• Employing a synchronous motor, these actuators provide floating control (-T), and modulating control with selectable 0-10 or 2-10 VDC (DM).
• All models are compact and are easily installed on Variable Air Volume (VAV) boxes, Variable Air Volume and Temperature (VVT) two-position zone applications, or small to medium-sized dampers with a round shaft up to 1/2 in. (13 mm) in diameter, or a 3/8 in. (10 mm) square shaft.
• The D(M)24-35 Series Electric Non-Spring Return Actuators provide a running torque of 35 lb·in (4 N·m), and the nominal travel time is 60 seconds at 60 Hz (72 seconds at 50 Hz) for 90° of rotation.

Installation

• For damper applications, the D(M)24-35 Series Electric Non-Spring Return Actuators mount directly to the surface in any convenient orientation using a single No. 10 self-drilling sheet metal screw.
• No additional linkages or couplers are required. Electrical connections on the actuator are clearly labeled to simplify installation.

Parts Included

• one electric non-spring return actuator with M3 screw terminals for the terminal strip option.

Special Tools Needed

• 5/16 in. (8 mm) square socket

• 2 Phillips screwdriver

• 3/8 in. (10 mm) 12-point socket
• drill with a 5/16 in. (8 mm) hex nut driver
• digital voltmeter or Commissioning Tool
• IMPORTANT: Use this D(M)24-35 Series Electric Non-Spring Return Actuator only to control equipment under normal operating conditions. Where failure or malfunction of the 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 actuator.
• IMPORTANT: Before specifying D(M)24-35 Series Electric Non-Spring Return Actuators for plenum applications, verify acceptance of exposed plastic materials in plenum areas with the local building authority.
• Building codes for plenum requirements vary by location. Some local building authorities accept compliance to UL 1995, Heating and Cooling Equipment, while others use different acceptance criteria.
• IMPORTANT: Do not install or use this D(M)24-35 Series Electric Non-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.

Dimensions

Mounting

To mount the actuator to a damper:

1. Check that the damper blade is visible, or its position is permanently marked on the end of the damper shaft, as illustrated in Figure 2.
2. Grasp the damper shaft firmly with pliers and rotate the damper fully closed, as illustrated in Figure 3.
3. Make a note of the rotation range and direction, either Clockwise (CW) or Counterclockwise (CCW), required to close the damper.
4. Press and hold the gear release lever, and rotate the actuator coupler to the fully closed position, as determined in Step 2.
5. Position the actuator onto the damper shaft so that the damper shaft protrudes through the actuator coupler, as illustrated in Figure 4.
   • Figure 4: Mounting the Actuator onto the Damper Shaft
6. Be certain that the actuator is in the desired mounting position parallel to the mounting surface, as illustrated in Figure 5.
7. Hold the actuator in place on the damper shaft, and insert the No. 10 self-drilling sheet metal screw through the shoulder washer, as illustrated in Figure 6.
8. Place a 5/16 in. (8 mm) socket on the screw and use a drill and extension to drill the screw into the mounting surface.
   • Drive the screw until it is tight against the washer.
   • IMPORTANT: Do not overtighten the mounting screw. Overtightening may strip the threads.
9. Tighten the square coupler bolt to the shaft using an 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12- point socket. Tighten to 11 to 15 N·m (100 to 130 lb·in).

Wiring

(Floating)

Note: When using the D24-35-T -T S or D24-35-T P model, you must use a VAV or VVT controller and/ or software that provides a timeout function at the end of rotation (stall) to avoid excessive wear or drive time on the actuator motor.

(Modulating)

• The DM24-35 Series actuators are factory set for Direct Acting (DA) mode and for a DC 0 to 10 V input control signal. In DA mode, a minimum control signal drives the actuator to the full Counterclockwise (CCW) position, and a maximum control signal drives the actuator to the full Clockwise (CW) position.
• For Reverse Acting (RA) operation, a minimum control signal drives the actuator to the full CW position and a maximum signal drives the actuator to the full CCW position.
• CAUTION: Risk of Electric Shock.
• Disconnect the power supply before making electrical connections to avoid electric shock.
• To change the factory settings (DA, 0-10 V), remove the actuator cover and adjust the switches on the circuit board as shown in Figure 13.
• CAUTION: Risk of Property Damage.
• Do not apply power to the system before checking all wiring connections. Short-circuited or improperly connected wires may result in permanent damage to the equipment.
• IMPORTANT: Make all wiring connections under local, national, and regional regulations. Do not exceed the electrical ratings of the D(M)24-35 Series Electric Non-Spring Return Valve Actuator.

Setup and Adjustments

Commissioning

• After wiring is completed, apply power to the VAV or VVT controller and provide input signals to the actuator to drive it at least one complete cycle open and closed.

Troubleshooting

• verify that the actuator assembly is properly secured to the duct
• check that all electrical connections are complete and that power is applied
• verify that the damper fully opens and closes, using the gear release button on the actuator
• check that the actuator stroke is set for the desired application
• Bray Controls Commercial Division
• 13788 West Road, Suite 200A
• Houston, Texas 77041
• BCDSales@Bray.com
• Phone: 1-888-412-2729
• Fax: 1-888-412-2720
• www.bravcommercialdivision.com

Documents / Resources

| Bray D(M)24-35 Delta Control Products [pdf] Instruction Manual
D M 24-35 Delta Control Products, D M 24-35, Delta Control Products, Control Products, Products
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