Ewc Controls nd248 Motorized Damper 24x8 Inch Rectangular

Product Description

The EWC CONTROLS nd248 is a 24 x 8 inch rectangular motorized damper designed for zoned HVAC duct systems. It operates on a power-open, power-close actuation method, meaning the motor drives the blade in both directions rather than relying on a spring return. This design gives the zone controller positive blade position confirmation in both the open and closed states. The nd248 uses a side-mount configuration, making it suitable for installations where end-mount access is restricted. Licensed HVAC technicians and sheet metal contractors are the primary installers of this type of damper in residential and light commercial zoning applications.

The nd248 is intended for rectangular duct zoning installations where reliable two-way motorized control is required. Its 24 x 8 inch face size fits standard duct openings of that dimension and is commonly installed in trunk-and-branch or extended plenum duct systems. The side-mount actuator positioning allows the damper to be placed in tighter duct runs where clearance above or below the duct is limited. It works within a zone control panel wiring scheme that supplies power to open and a separate power signal to close the blade.

Key Features

• Power-open and power-close actuation provides positive blade position control in both directions
• 24 x 8 inch rectangular face size fits standard duct openings of that dimension
• Side-mount actuator design accommodates installations with limited clearance above or below the duct
• Suitable for residential and light commercial HVAC zoning systems
• Compatible with zone control panels wired for dual-powered damper operation

Compatibility

Designed as an OEM-style replacement or new-installation motorized damper for rectangular duct zoning systems requiring power-open and power-close operation in a 24 x 8 inch duct opening.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage duct zoning wiring. Shut off power to the zone control panel and the air handler before beginning installation. Verify the duct opening measures 24 x 8 inches before mounting and confirm the zone panel supports power-open, power-close damper wiring. Follow local mechanical codes and the zone controller manufacturer wiring diagram when making low-voltage connections.

Technical Specifications

• Duct Opening Size: 24 x 8 inches
• Duct Shape: Rectangular
• Actuator Mount: Side Mount
• Actuation Type: Power Open / Power Close

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: nd248