Zonefirst ZDB-12X12 12HX12W Parallel 24V 2-Pos S/R

The Zonefirst ZDB-12X12 is a professional-grade 12x12 zone damper engineered for robust airflow management in residential and light commercial HVACR systems. Built with a heavy-duty extruded aluminum frame and 3-inch parallel blades, this bottom-mount zone damper features a 24V spring return motor that ensures fail-safe operation by defaulting to the open position during power loss. The low-voltage HVAC actuator utilizes a synchronous hysteresis motor, tested to exceed 250,000 cycles, providing reliable 2-position (power-close/spring-open) control. Designed for high-performance HVAC zoning solutions, the unit maintains a tight seal against duct pressures up to 1.0” W.C. and includes self-lubricating Delrin bushings for silent, maintenance-free operation. Contractors can easily field-convert this unit to power-open/spring-close configurations in minutes, making it a versatile choice for direct-wire or master-sub damper setups. Note that the damper dimensions are 1/4” undersized for seamless insertion into standard 12H x 12W ductwork.

• Fail-Safe Logic: The 24V spring return mechanism ensures the system defaults to the open position if power is interrupted, preventing equipment freeze-ups.
• Durable Construction: Features a corrosion-resistant aluminum frame and zinc-plated linkage for long-term reliability in varying humidity levels.
• Silent Blade Operation: Parallel 3-inch blades pivot on self-lubricating bushings for quiet transitioning in noise-sensitive environments.
• Contractor-Friendly Setup: Simplified adjustment of the 2-position motor and the ability to field-reverse operation reduces installation time on the job site.

Is the ZDB-12X12 compatible with generic 24V zone control panels?
Yes, this 2-wire zone damper is compatible with most 24V AC standard zoning panels. It requires 24VAC to power the actuator closed and relies on the internal spring to return it to the open state.

Can I install this damper in any orientation?
The Zonefirst ZDB-12X12 is designed for bottom-mount applications where the motor and end plate reside on the width dimension, but it can be installed in any position within a properly sized duct provided the motor remains accessible for maintenance.

What is the typical timing for the actuator?
The motor typically achieves a full power-close in approximately 30 seconds and a spring-return to the open position in about 8 seconds, ensuring rapid response to thermostat calls.

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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.