Zonefirst ZDS-24X16 24WX16H Parallel 24V 2-Pos S/R

The Zonefirst ZDS-24X16 is a heavy-duty rectangular zone damper engineered for professional HVAC zoning applications. Built with a sturdy extruded aluminum frame and 24-inch by 16-inch dimensions, this parallel blade damper features 3-inch blades that pivot on self-lubricating bushings for silent, long-term operation. As a 2-wire 24V power-close spring-return unit, it remains normally open to ensure fail-safe airflow during power loss, a critical requirement for static pressure management and A2L refrigerant safety compliance. The side-mount actuator design places the motor on the 16-inch height dimension, allowing for a 4-inch side-slot insertion that simplifies HVAC zone control retrofit projects. This model is rated for duct pressure up to 1.0” W.C. and includes a minimum position adjustment screw to allow bypass air, often eliminating the need for a dedicated bypass damper. The synchronous 24VAC motor is field-reversible to power-open if system integration requirements change.

• Fail-Safe Operation: The spring return zone damper motor ensures the blades return to the open position upon loss of power, preventing coil freeze-ups or high-limit trips.
• Precision Construction: Features extruded aluminum frames and zinc-plated linkage to prevent corrosion and ensure smooth blade modulation under high static pressure.
• Contractor-Friendly Install: Designed for a standard 4-inch duct cut-in, the side mount ZDS damper slides directly into the airflow path with minimal hardware.
• Field Flexibility: Includes a minimum position setting to maintain continuous air circulation in specific zones and can be field-converted from power-closed to power-open in minutes.

How do I wire the ZDS-24X16 to a standard zone panel?
This is a 2-wire actuator. Simply connect the two motor leads to the M1 (Common) and M6 (Closed) terminals on your 24V zone control panel. The damper requires constant power to stay closed and will spring open when power is removed.

Can this damper be used in high-velocity systems?
The Zonefirst ZDS series is rated for a maximum static pressure of 1.0” W.C., making it suitable for most residential and light commercial forced-air systems.

Is the actuator motor replaceable?
Yes, the actuator can be swapped in under a minute by loosening the shaft setscrew. This allows for easy maintenance without removing the entire damper assembly from the ductwork.

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.