Dwyer DDA User Manual

Bulletin V-19

Series DDA 17, 35, 53 and 70 in-lb On/Off Damper Actuator

Specifications - Installation and Operating Instructions

DDA Series Direct Coupled Actuators are non-spring return actuators

that are perfect for positioning of dampers and valves in HVAC systems.
Actuators are designed to accept floating control signals and come in a
variety of power supplies. Actuators produce 17 to 70 in-lb (2 to 8 Nm) of
torque. Contact factory for optional internal auxiliary switch.

Features

• Direct mount.

• Actuator travel indicator.

• Overload protection.

• Manual override.

• Floating control signal.

• 60,000 cycles nominal.

FUNCTION TESTING

Press the manual button on the back of the actuator. The gearing inside
the actuator will break away. The damper can be operated manually
while pressing the manual button. DO NOT OPERATE WHEN POWER
IS ON!

SPECIFICATIONS
Power Requirements: 110 VAC, 24 VAC, ±10%, 50/60 Hz, single

phase. Optional 230 VAC.
Power Consumption: 110 VAC models: 5 VA, 230 VAC models: 5 VA,
24 VAC models: 3 VA.

Control Input: Two-position, floating.
Overload Protection: Magnetic clutch.
Angle of Rotation: 95° (mechanically adjustable).
Fits Shaft Diameter: 0.4˝ (10 mm) or 0.5˝ (13 mm).
Position Indication: Visual indicator.
Direction of Rotation: CW/CCW.
Running Time: 17 in-lb, 35 in-lb, 53 in-lb: 72 sec.; 70 in-lb:160 sec.
Electrical Connection: Terminal block, 18 AWG.
Manual Override: Push button.
Temperature Limit: -22 to 122°F (-30 to 50°C).
Sound: <45 dB.
Life Expectancy: 60000 full cycles.
Housing: NEMA 2 (IP48).
Standard Accessories: (2) imitative baffles, (2) baffle setscrews, (1)

actuator body setscrew, and (1) aluminum gasket.

Weight: 1.72 lb (0.78 kg).

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]

WIRING DIAGRAM

(Normal model)

INSTALLATION

Before installation, the aluminum gasket should be put into the hole of
Output Axle. Install the damper actuator on the damper shaft by
universal holder.

MODELS (With optional auxiliary switches)

MAINTENANCE

Upon final installation of the Series DDA Non-Spring Return Direct
Coupled Actuator, no routine maintenance is required. A periodic check
of the system calibration is recommended. The Series DDA is not field
serviceable and should be returned if repair is needed (field repair
should not be attempted and may void warranty). Be sure to include a
brief description of the problem plus any relevant application notes.
Contact customer service to receive a return good authorization number
before shipping.

a = .4˝ (10 mm)

or

.5˝ (13 mm)

©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 5/14 FR# R3-443451-00 Rev. 2

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]