Ewc Controls END-20X8-MA15S Motorized Zone Damper 20x8 in

Product Description

The EWC CONTROLS END-20X8-MA15S is a motorized zone damper from the ND Ultra-Zone series, designed for forced-air HVAC zoning systems. It operates on a three-wire power open/power closed configuration, giving zone controllers direct, positive blade positioning in both directions. The motor delivers 17 inch-pounds of torque and includes a manual gear release for service situations. A built-in LED display lets technicians verify damper operation at a glance during commissioning. Nylon bushings and overlapping blades contribute to quiet, accurate airflow control across individual zones. Licensed HVAC technicians install this damper as part of a multi-zone residential or light-commercial duct system.

The END-20X8-MA15S fits a 20-by-8-inch rectangular duct opening and is intended for use in residential and light-commercial forced-air zoning applications. It is engineered to integrate with the EWC CONTROLS Ultra-Zone zoning system. The damper suits new construction and retrofit installations where individual room or zone temperature control is required. Its quick-connecting terminal block accepts wiring without wire nuts, reducing installation time on multi-damper jobs. The sturdier frame design allows for faster duct insertion compared to standard damper frames.

Key Features

• Three-wire power open/power closed operation for positive bidirectional blade control
• 17 inch-pounds of motor torque with manual gear release for service access
• LED display provides on-damper diagnostic feedback during installation and checkout
• 97 percent leak-proof rating with overlapping blade design for accurate zone isolation
• Quick-connecting terminal block eliminates wire nuts and speeds field wiring
• UL listed motor with NEMA Class 2 certification
• Nylon bushings for quieter operation and extended motor service life

Compatibility

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

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with forced-air zoning systems and low-voltage control wiring. Shut down the air handler and de-energize all control circuits before inserting or wiring the damper. Verify duct dimensions match the 20-by-8-inch damper frame before securing. Follow the zoning system controller wiring diagram and applicable local mechanical codes when terminating the three-wire motor leads at the terminal block.

Technical Specifications

• Damper Size: 20x8 inches
• Motor Torque: 17 inch-pounds
• Operation Type: Power open / power closed, 3-wire
• Leak Rating: 97 percent leak-proof
• Motor Certification: UL listed, NEMA Class 2
• Package Length: 24 inches
• Package Width: 14 inches
• Package Height: 7 inches
• Weight: 6.8 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-20X8-MA15S