Ewc Controls EURD-8 Motorized Round Damper 8 Inches

Product Description

The EWC CONTROLS EURD-8 is a single-blade, round motorized damper designed for zoning and air quality control in ducted HVAC systems. The unit ships with a two-position, 24-volt motor that is powered in both directions — powered open and powered closed — eliminating reliance on a spring return. A 3-wire connection (common, power-open, power-closed) gives the installing technician straightforward wiring to a zone controller or relay board. LED indicators confirm blade position: red signals fully closed, green signals fully open. These indicators illuminate only after the blade reaches its full travel position, making them a reliable status check rather than a simple motor-power indicator.

The EURD-8 is suited for residential and light commercial HVAC zoning applications where positive damper control is required in 8-inch round ductwork. It is a fit for air quality and zoning systems where the zone controller or damper panel requires a powered-open, powered-closed actuator rather than a spring-return type. HVAC technicians and sheet metal installers typically specify this damper in supply or bypass duct runs tied to multi-zone forced-air systems.

Key Features

• Two-position 24-volt motor — powered open and powered closed with no spring-return dependency
• 3-wire hookup: common, power-open leg, and power-closed leg for straightforward zone controller integration
• Red and green LED indicators confirm full blade travel — red for closed, green for open
• LED indicators serve as a failsafe: they do not illuminate until the blade reaches full open or full closed position
• Single-blade round design sized for 8-inch round duct

Compatibility

Designed as an OEM-style motorized damper for use with 24-volt zone control systems requiring a powered-open, powered-closed actuator in 8-inch round duct applications.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zoning systems. Disconnect power to the air handler and zone controller before wiring the damper motor. Confirm the zone control panel or relay board supports a powered-open, powered-closed actuator before connecting the 3-wire harness. Follow all applicable mechanical and electrical codes, including NEC low-voltage wiring requirements, during installation.

Technical Specifications

• Product Type: Motorized Round Damper
• Size: 8 inches
• Shape: Round
• Motor Voltage: 24 volts
• Motor Operation: Two-position, powered open and powered closed
• Wires to Motor: 3
• Application: Air Quality / HVAC Zoning

Standard Information

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