Ewc Controls END-8X20-MA15S Motorized Zone Damper 8x20

Product Description

The EWC CONTROLS END-8X20-MA15S is a motorized zone damper from the ND Ultra-Zone series, designed for use in forced-air HVAC zoning systems. The damper provides power open and power closed operation using a 3-wire configuration, giving zone controllers precise airflow control across multiple zones. The motor delivers 17 inch-pounds of torque and includes a manual gear release for quick service access. Nylon bushings reduce operating noise, and an onboard LED display lets technicians visually confirm damper position and run fast diagnostic checks without additional test equipment. The unit carries a 97 percent leak-proof rating thanks to overlapping blade construction and a strong positive-off motor.

The END-8X20-MA15S is sized for 8 x 20 inch rectangular duct runs and is intended for residential and light-commercial zoning installations where reliable airflow regulation is required. It is designed to integrate with the EWC Ultra-Zone zoning system and is well suited for multi-zone forced-air applications. Licensed HVAC technicians handling zone system commissioning or retrofit work are the primary installers. The quick-connecting terminal block eliminates wire nuts and speeds up field wiring during system checkout.

Key Features

• Power open and power closed 3-wire operation for positive zone control
• Motor rated at 17 inch-pounds of torque with manual gear release
• 97 percent leak-proof rating with overlapping blade design
• Nylon bushings for quieter operation and extended motor life
• LED display for in-field damper position verification and diagnostics
• Quick-connecting terminal block eliminates wire nuts and simplifies wiring
• UL listed motor with NEMA Class 2 certification

Compatibility

Designed for use with the EWC Ultra-Zone zoning system. Fits 8 x 20 inch rectangular duct openings in residential and light-commercial forced-air HVAC systems.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoned forced-air systems and applicable mechanical codes. Power down the air handler and zone control panel before wiring the damper to the terminal block. Verify duct dimensions before installation to ensure a proper fit, and confirm the motor rotation direction matches the zone controller wiring scheme. Do not force the blades manually while the motor is energized.

Technical Specifications

• Damper Size: 8 x 20 inches
• Operation Type: Power Open / Power Closed (3-wire)
• Motor Torque: 17 inch-pounds
• Leak Rating: 97 percent leak-proof
• Motor Certification: UL Listed, NEMA Class 2
• Length: 24 inches
• Width: 14 inches
• Height: 7 inches
• Weight: 6.8 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-8X20-MA15S