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The EWC CONTROLS END-30X10 is a rectangular motorized zone damper built for residential and light-commercial HVAC zoning systems. Measuring 30 inches by 10 inches, this ND-series damper operates on 24 volts and uses a 3-wire motor connection with a side-mount motor configuration. An onboard LED indicator lets the installing technician visually confirm damper position and operation during checkout without additional test equipment. The reinforced frame speeds duct installation, and nylon bushings on the blade shaft reduce mechanical noise during operation, contributing to a longer service life for the motor assembly.
This damper is intended for rectangular supply or return duct sections in forced-air zoning applications where independent temperature control is needed for separate building zones. It is suited to air quality and zone control setups where quiet, reliable blade actuation is a priority. The 24-volt control signal makes it compatible with standard low-voltage zone control panels and thermostats used in residential zoning installations. A licensed HVAC technician typically handles sizing, ductwork modification, and panel wiring.
Designed as an OEM-style replacement or new-installation motorized damper for rectangular duct zoning systems operating on 24-volt low-voltage control circuits, consistent with EWC CONTROLS ND-series Ultra-Zone applications.
Installation should be performed by a qualified HVAC technician. Power down the air handler and de-energize the zone control panel before making any wiring connections. Confirm duct dimensions match the damper face size before cutting or modifying ductwork, and follow the zone panel manufacturer wiring diagram for the 3-wire motor connection. Refer to applicable mechanical codes for duct penetration and damper placement requirements.
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