Zonefirst ZDS-30X12 30WX12H Parallel 24V 2-Pos S/R

The Zonefirst ZDS-30X12 is a professional-grade rectangular zone damper engineered for high-performance airflow management in residential and commercial HVAC zoning systems. This side-mount (ZDS) model measures 30"W x 12"H and features an extruded aluminum frame with 3" parallel blades, ensuring minimal air pressure drop and smooth, silent operation. Equipped with a 24V spring return (S/R) motor, this 2-wire actuator is designed for a power-closed/spring-open fail-safe configuration, although it can be field-converted for power-open applications in minutes. The hysteresis synchronous motor is rated for over 250,000 cycles, providing reliable 2-position control even in systems with static pressures up to 1.0" W.C. With self-lubricating bushings and a integrated minimum position adjustment screw, the ZDS-30X12 parallel damper allows technicians to fine-tune bypass air directly at the unit, optimizing internal air circulation without the need for additional bypass ductwork in many installations.

• Durable Aluminum Construction: The extruded frame and parallel blades resist corrosion and maintain structural integrity in high-velocity airflow.
• Fail-Safe S/R Operation: The 2-wire 24V motor automatically springs to the open position upon loss of power, ensuring continuous ventilation.
• Field Versatility: Simplified side-mount design allows for quick insertion into a 4-inch duct slot, while the motor can be easily replaced via a single set-screw.
• Precision Airflow Control: Features a manual adjustment for setting a minimum position to meet specific air exchange requirements.

Is this damper compatible with standard zone control panels?
Yes, the 2-wire 24V motor is compatible with most HVAC zone control boards using M1 and M6 terminals or a dedicated transformer-switched circuit.

Can I install this damper vertically?
The ZDS series can be installed in any position within a properly sized duct, provided the motor is accessible for service and the duct opening is cut to the full height and width seams.

How do I adjust the minimum air bleed?
With the power off (damper open), loosen the minimum position set screw and slide it to the desired stop point indicated on the label to prevent the damper from closing fully.

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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.