EWC Controls ND Series 12X12 ND Rectangular Motorized Damper, 12" x 12" Opening Size, Rectangular, 24 VAC, 550 CFM, Slip-In, Side/Bottom Mount (Motor), 1.5 In. Wc. Pressure Rating, Power Open/Power Close, Non-Spring Return

This ND Series rectangular motorized damper simplifies HVAC zoning installations. Built with heavy-duty 0.80" extruded aluminum and quiet nylon bearings, it ensures durability and minimal noise. The overlapping parallel blade design provides low leakage, enhancing system efficiency. It operates reliably at static pressures up to 1.5" w.c. and duct velocities up to 1500 FPM.The damper features a robust 24V, 3-wire power-open/power-close motor actuator delivering 18 in-lbs of torque. Integrated diagnostic LEDs clearly indicate open and closed positions, aiding setup and troubleshooting. Adjustable end stops allow for setting minimum airflow (leakage) when closed or limiting the maximum open position for balancing purposes.

EWC Controls Rectangular Motorized Damper, Model: ND Series, 12" x 12" Opening Size, Rectangular, 24 VAC, 550 CFM, Slip-In, Side/Bottom Mount (Motor), 1.5 In. Wc. Pressure Rating, Power Open/Power Close, Non-Spring Return, 18 in-lb, 40 Seconds Timing Range, 24 VAC, 3-Wire Power Open/Power Close (Floating Function), 18 in-lb Torque, NEMA 1 Housing, UL Listed, 12" H x 12" W x 4" D Dimensions, Quick Connecting Terminal Block, 3-Wire Electrical Connection, Extruded Aluminum (Frame/Blades), Nylon (Bearings), UL Listed (Motor Actuator), NEMA 1 (Motor Housing), Mill Finish (Extruded Aluminum), Silver, Overlapping Parallel, 1,500 FPM, 1.5 A, 185 °F (Maximum, Operating), 50 Hz, 60 Hz, 1 Phase, Domestic

• Constructed with a heavy-duty 0.80" extruded aluminum frame and blades.
• Nylon bearings ensure quiet operation, reducing noise complaints.
• Features a reliable 24V AC/DC, 3-wire power-open/power-close motor (18 in-lb torque).
• Overlapping parallel blade design minimizes air leakage for better zone control.
• Integrated LEDs provide clear visual indication of damper open/closed status.
• Adjustable end stops allow customization of minimum and maximum airflow positions.
• Motor actuator is UL Listed.

• Catalog https://s3.amazonaws.com/open-secret-production-public/data-studio/marcone/documents/catalog-3970-5413.pdf
• Submittal https://s3.amazonaws.com/open-secret-production-public/data-studio/marcone/documents/model-nd-rectangular-dampers-with-ma-nd5-actuator-submittal-sheet-3970-5414.pdf
• Sell Sheet https://s3.amazonaws.com/open-secret-production-public/data-studio/marcone/documents/nd-series-rectangular-zone-dampers-sell-sheet-3970-3320.pdf
• Warranty https://s3.amazonaws.com/open-secret-production-public/data-studio/marcone/documents/warranty-3970-3413.pdf