Ewc Controls EURD-8-MA15S Motorized Round Damper 8 Inches

Product Description

The EWC CONTROLS EURD-8-MA15S is an 8-inch round motorized damper with a single-blade design and a two-position, 24-volt motor. The motor is powered in both directions — powered open and powered closed — making it a fully actuated unit rather than a spring-return design. An integrated LED indicator system shows blade position in real time: red when fully closed, green when fully open. These indicators only illuminate once the blade has reached its full travel position, providing a reliable visual confirmation of damper state. HVAC technicians install this unit in residential and light commercial zoning and air quality applications.

The EURD-8-MA15S is suited for duct systems where positive control of airflow in both directions is required. Its 8-inch round form factor fits standard round ductwork used in forced-air zoning systems. The three-wire motor hookup — common, power-open leg, and power-closed leg — integrates with typical 24-volt zone control boards and panel wiring. This makes it a practical choice for new zoning installations as well as retrofit projects where spring-return dampers are being replaced with fully powered actuators.

Key Features

• Two-position motor: powered open and powered closed — no spring return required
• 24-volt motor compatible with standard low-voltage zone control wiring
• LED position indicators: red for closed, green for open
• Indicators activate only at full blade travel — confirms complete open or close stroke
• Three-wire hookup: common, power-open, and power-closed legs
• Single-blade round damper design for 8-inch round ductwork

Compatibility

Designed for use in 8-inch round duct systems in residential and light commercial HVAC zoning and air quality applications. Compatible with standard 24-volt zone control panels that support powered-open and powered-closed damper wiring.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zone control wiring. Shut down the air handler and de-energize the control panel before making any wiring connections. The three-wire connection requires a dedicated common, power-open, and power-closed circuit from the zone controller — verify the controller supports fully powered actuators before installation. Confirm full blade travel and correct LED indication after powering up the system.

Technical Specifications

• Product Type: URD Motorized Damper
• Shape: Round
• Size: 8 inches
• Motor Voltage: 24 volts
• Motor Positions: Two-position (powered open and powered closed)
• Wires to Motor: 3 (common, power-open, power-closed)
• Position Indicators: LED (red = closed, green = open)
• Application: Air Quality

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: EURD-8-MA15S