Ewc Controls EURD-7-MA15S 7 Inch Round Motorized Damper

Product Description

The EWC CONTROLS EURD-7-MA15S is a single-blade round motorized damper designed for zone control and air quality applications in ducted HVAC systems. The unit ships with a two-position, 24-volt motor actuator that operates in both directions — powered open and powered closed — eliminating the need for a spring-return mechanism. The motor uses a 3-wire hookup consisting of a common, a power-open leg, and a power-closed leg. Built-in LEDs provide a visual position indicator: red signals fully closed, green signals fully open. These indicators are failsafe by design, meaning they will not illuminate until the blade has reached its full open or full closed position.

The EURD-7-MA15S is suited for residential and light commercial forced-air HVAC zoning installations where positive damper control is required in both the open and closed positions. The 7-inch round form factor fits standard round duct runs. Typical applications include multi-zone air distribution systems, indoor air quality control setups, and fresh-air or ventilation bypass configurations where reliable, confirmed blade positioning is critical to system performance.

Key Features

• Two-position 24-volt motor actuator — powered open and powered closed, no spring return required
• 3-wire motor connection: common, power-open, and power-closed legs
• LED position indicators: red for fully closed, green for fully open
• Failsafe LED logic — indicators only illuminate after blade reaches full travel
• Single-blade round damper design for straightforward installation in round duct
• 7-inch diameter fits standard round duct sizing

Compatibility

Designed as an OEM-style replacement or new-installation motorized damper for residential and light commercial ducted HVAC zoning systems that use 24-volt two-position control wiring.

Installation Notes

Installation is typically performed by a licensed HVAC technician. Power down the air handler and de-energize the 24-volt control circuit before wiring or repositioning the damper. Verify that the duct diameter matches the 7-inch damper size before installation. Follow local mechanical codes and the system manufacturer's wiring diagram when connecting the 3-wire actuator to the zone control board.

Technical Specifications

• Product Type: URD Motorized Damper
• Shape: Round
• Size: 7 inches
• Motor Voltage: 24 volts
• Motor Operation: Two-position, powered open and powered closed
• Wires to Motor: 3
• Application: Air Quality

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: EURD-7-MA15S