Ewc Controls END-14X8-MA15S Nd Series Motorized Damper

Product Description

The EWC CONTROLS END-14X8-MA15S is a motorized zone damper in the ND Series Ultra-Zone line, sized at 14 inches by 8 inches for rectangular duct applications. It is designed for HVAC zoning systems and is installed by licensed HVAC technicians to control airflow across individual zones in residential and light commercial ductwork. The motor delivers 17 inch-pounds of torque and operates on a 3-wire power-open/power-closed configuration. Nylon bushings reduce operational noise, and a 97 percent leak-proof blade seal rating ensures accurate zone isolation. An LED display lets the technician confirm damper position and status at a glance during installation and checkout.

The END-14X8-MA15S fits into standard rectangular duct systems where zone control is required. It is intended for use as part of a zoning system, particularly compatible with the EWC CONTROLS Ultra-Zone zoning platform. A sturdier frame design allows faster field installation compared to earlier ND Series models. The quick-connecting terminal block eliminates wire nuts and simplifies wiring connections during rough-in. The damper is well suited for residential forced-air systems where multiple zones are served by a single air handler or furnace.

Key Features

• 17 inch-pounds of motor torque for reliable blade actuation
• 3-wire power-open/power-closed operation with fail-safe LED diagnostics
• 97 percent leak-proof rating from overlapping blade design and positive-off motor
• Nylon bushings for quieter operation and extended motor service life
• Quick-connecting terminal block eliminates wire nuts for faster wiring
• Manual gear release for damper positioning during power-off conditions
• UL listed motor with NEMA Class 2 certification

Compatibility

Designed for use with the EWC CONTROLS Ultra-Zone zoning system. Fits standard 14-inch by 8-inch rectangular duct openings in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation should be performed by a qualified HVAC technician familiar with duct zoning systems. Disconnect power to the air handler and zone control board before wiring or mounting the damper. Verify duct dimensions before installation to confirm proper fit. Follow all applicable mechanical codes and the zone controller manufacturer wiring diagram during low-voltage connection.

Technical Specifications

• Damper Size: 14 inches x 8 inches
• Motor Torque: 17 inch-pounds
• Operation Type: 3-wire power-open/power-closed
• Leak-Proof Rating: 97 percent
• Motor Certification: UL Listed, NEMA Class 2
• Length: 21 inches
• Width: 14 inches
• Height: 7 inches
• Weight: 5.5 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-14X8-MA15S