Ewc Controls END-18X8-MA15S Motorized Zone Damper 18x8 in

Product Description

The EWC CONTROLS END-18X8-MA15S is a motorized zone damper engineered for residential HVAC zoning systems. It delivers power open and power closed operation via a 3-wire configuration, driven by a motor rated at 17 inch-pounds of torque with a manual gear release for override capability. The damper features a 97% leak-proof rating achieved through overlapping blades and a positive-off motor, ensuring accurate airflow control across all zones. Nylon bushings reduce operational noise, and onboard fail-safe LEDs give technicians a fast visual indication of damper status. A quick-connecting terminal block eliminates wire nuts for cleaner, faster field wiring.

This damper is intended for use in residential forced-air zoning installations where individual zone control is required. It mounts directly into the ductwork and is designed to pair with Ultra-Zone zoning control systems. The sturdier frame construction speeds up duct installation and reduces flex during seating. Licensed HVAC technicians performing zoning retrofits or new-construction multi-zone builds are the primary installers. The LED display allows for immediate visual confirmation of blade position during commissioning and troubleshooting without additional test equipment.

Key Features

• Power open and power closed 3-wire operation for reliable zone control
• Motor produces 17 inch-pounds of torque with manual gear release for override
• 97% leak-proof rating from overlapping blade design and positive-off motor
• Nylon bushings for quieter operation and extended motor service life
• Onboard LED display and fail-safe LEDs for fast diagnostic checks
• Quick-connecting terminal block eliminates wire nuts and speeds wiring
• UL listed motor with NEMA Class 2 certification

Compatibility

Designed for use with the Ultra-Zone zoning system and compatible with standard residential forced-air duct systems requiring an 18x8 inch motorized damper.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with forced-air zoning systems and low-voltage control wiring. Power down the air handler and de-energize the zone control board before making any wiring connections at the terminal block. Verify blade orientation and confirm LED status indicators show correct open and closed positions before restoring system power. Follow local mechanical codes and manufacturer wiring diagrams for proper 3-wire hookup.

Technical Specifications

• Damper Size: 18x8 inches
• Operation Type: Power Open / Power Closed (3-wire)
• Motor Torque: 17 inch-pounds
• Leak Rating: 97% leak-proof
• Motor Certification: UL Listed, NEMA Class 2
• Length: 22 inches
• Width: 14 inches
• Height: 7 inches
• Weight: 6.4 pounds

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: END-18X8-MA15S