EWC Controls RSD 14" Motorized Damper

The EWC Controls RSD 14" Motorized Damper is a professional-grade HVAC zone damper engineered for precision air management in residential and light commercial systems. Constructed from heavy 24-gauge galvanized steel, this spring return motorized damper provides a robust solution for fresh air intake or standard zoning applications. The unit features a 24V damper actuator that is direct-coupled to the damper blade shaft, ensuring reliable 2-wire operation without the complexity of external linkages. A double layered blade design with an integrated Poron foam gasket delivers a superior seal, substantially reducing air leakage compared to standard single-blade models.

Installers benefit from the field-reversible logic; while it comes standard as power closed/spring open, it can be reconfigured for power open/spring closed operation to match specific system requirements. The integrated travel limiter allows for manual adjustment of the minimum air bleed, protecting equipment from high static pressure even when the zone is "closed." This 14-inch model is Made in USA and compatible with the Ultra-Zone BM and BMPlus control panels.

Key Benefits

• Field Reversible Actuation: Easily switch between power closed/spring open and power open/spring closed configurations on the job site.
• Enhanced Sealing: Features an integrated Poron foam gasket and double layered blade to maximize thermal efficiency and minimize energy loss.
• Static Pressure Management: Includes a built-in travel limiter to prevent 100% closure, ensuring safe minimum airflow for the heat exchanger or coil.
• Durable Construction: Built with 24-gauge galvanized steel and a synchronous 24VAC 8VA motor for long-term survival in high-cycle environments.
• Universal Compatibility: Works seamlessly with 24-volt systems and flexible or rigid ductwork.

Common Questions

Can the motor be replaced without swapping the entire damper assembly?
Yes, the MA-RSD motor actuator is direct-coupled and can be field-replaced by removing the anti-rotation nut and motor shaft screw.

Is this damper suitable for high-voltage systems?
The standard RSD is a 24-volt unit. For 120-volt applications, contractors should specify the URD-LF120 or URD-SRE120 models.

Does this unit indicate position via LEDs or end switches?
The RSD series focuses on streamlined 2-wire operation and does not include LEDs or internal end switches. If position feedback is required for your control logic, we recommend moving to the URD series.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.