Ewc Controls END-10X20-MA15S Motorized Zone Damper 10x20

Product Description

The EWC CONTROLS END-10X20-MA15S is a motorized zone damper from the ND Ultra-Zone series, engineered for residential and light-commercial HVAC zoning applications. This 10 x 20 inch damper operates on a 3-wire power open/power closed configuration and is driven by a motor producing 17 inch-pounds of torque with a built-in manual gear release. An LED display on the motor assembly allows technicians to verify damper position during commissioning without additional test equipment. Nylon bushings reduce operational noise, and a 97% leak-proof blade seal rating ensures accurate zone control with minimal air bypass.

The END-10X20-MA15S installs into rectangular sheet metal ductwork in zoned forced-air systems, both new construction and retrofit. It is designed for use with the EWC Ultra-Zone zoning system and pairs with compatible zone control boards and thermostats. The quick-connecting terminal block eliminates wire nuts and speeds field wiring. Licensed HVAC technicians handling residential zoning projects will find this damper suited for multi-zone split systems, air handlers, and ducted heat pump applications where precise zone isolation is required.

Key Features

• 3-wire power open/power closed motor operation for positive zone control
• 17 inch-pounds of motor torque with manual gear release for commissioning or emergency override
• LED diagnostic display for visual confirmation of damper position without a meter
• 97% leak-proof blade seal rating with overlapping blade design
• Nylon bushings for quieter operation and extended motor service life
• Quick-connect terminal block — no wire nuts required
• UL listed motor with NEMA Class 2 certification

Compatibility

Designed for use with the EWC Ultra-Zone zoning system. Fits standard 10 x 20 inch rectangular duct openings in forced-air HVAC systems.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with zoned forced-air systems. Power down the air handler and zone control panel before wiring the damper. Verify duct opening dimensions match the damper frame size before fastening to avoid frame distortion. Follow applicable mechanical codes and the zone panel manufacturer's low-voltage wiring diagram when terminating the 3-wire connection at the control board.

Technical Specifications

• Damper Size: 10 x 20 inches
• Motor Operation: 3-wire power open / power closed
• Motor Torque: 17 inch-pounds
• Leak Rating: 97% leak-proof
• Motor Certification: UL listed, NEMA Class 2
• Package Length: 22 inches
• Package Width: 14 inches
• Package Height: 7 inches
• Weight: 6.9 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-10X20-MA15S