Ewc Controls END-12X8-MA15S Motorized Zone Damper 12x8 in

Product Description

The EWC CONTROLS END-12X8-MA15S is a motorized zone damper built for forced-air HVAC zoning systems. It uses a power open/power closed, 3-wire motor configuration to precisely control airflow through a 12 x 8 inch duct opening. The motor delivers reliable torque with a manual gear release and a fail-safe LED indicator system for fast diagnostic checks in the field. Overlapping blades and a strong positive-off motor position combine to achieve a 97% leak-proof rating, minimizing air bypass between zones. Nylon bushings reduce operating noise, and the heavy-duty frame allows for faster duct installation. Licensed HVAC technicians working on residential or light commercial zoning systems install this damper as part of a multi-zone air distribution setup.

This damper is sized for 12 x 8 inch rectangular duct and is intended for use in forced-air zoning applications where individual zones require independent airflow control. The ND series is designed to integrate with the EWC Ultra-Zone zoning system. A quick-connecting terminal block eliminates wire nuts and simplifies field wiring. The motor is always mounted on the second dimension specified, which is the 8-inch side on this unit. The LED indicators allow the installer to visually confirm open and closed damper positions without additional test equipment, reducing checkout time on multi-zone jobs.

Key Features

• Power open/power closed 3-wire motor operation with manual gear release
• 97% leak-proof rating with overlapping blade design
• Fail-safe LED indicators for visual damper position confirmation
• Nylon bushings for quieter operation and extended motor service life
• Heavy-duty frame for faster, more secure duct installation
• Quick-connecting terminal block eliminates wire nuts for clean, reliable field wiring

Compatibility

Designed for use with the EWC Ultra-Zone zoning system and sized for 12 x 8 inch rectangular duct openings in forced-air HVAC distribution systems.

Installation Notes

Installation should be performed by a licensed HVAC technician. Power down the air handler and zone controller before wiring or mounting the damper. The motor mounts on the side corresponding to the second dimension specified in the part number, which is the 8-inch dimension on this unit. Follow NEC low-voltage wiring guidelines and local mechanical codes when routing control wiring to the zone controller terminal block.

Technical Specifications

• Duct Size: 12 x 8 inches
• Operation Type: Power Open / Power Closed, 3-Wire
• Blade Leakage Rating: 97% leak-proof
• Motor Certifications: UL Listed, NEMA Class 2
• Package Length: 17 inches
• Package Width: 14 inches
• Package Height: 7 inches
• Weight: 5 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-12X8-MA15S