Zonefirst ZDS-30X8 30WX8H Parallel 24V 2-Pos S/R

The Zonefirst ZDS-30X8 is a professional-grade HVAC zone damper engineered for side-mount applications in rectangular ductwork. Featuring a parallel blade design, this 30"W x 8"H unit utilizes a 24V motor that operates in a 2-position power-close, spring-return configuration. Built with a sturdy extruded aluminum frame, the ZDS-30X8 ensures silent operation with its 3-inch blades pivoting on self-lubricating bushings. This spring return damper is rated for static pressures up to 1.0" W.C. and includes an adjustable minimum position set screw, allowing for reliable bypass air management without the need for additional components. Designed for straightforward integration, this 24 volt zone damper can be field-converted to power-open if your specific zoning system logic requires it. The side-mount orientation places the actuator on the height dimension, making it ideal for tight clearance installs in multi-zone residential or light commercial systems.

• Durable Construction: Extruded aluminum frame and zinc-plated linkage provide maximum corrosion resistance and long-term HVAC system reliability.
• Silent Operation: Parallel blades with self-lubricating bushings prevent the rattling and whistling often associated with standard duct dampers.
• Fail-Safe Logic: The spring return mechanism ensures the damper returns to the open position upon loss of power, preventing coil freeze-ups or high-limit trips.
• Precision Control: Integrated minimum position adjustment allows for fine-tuning airflow control to maintain head pressure and system balance.
• Versatile Wiring: Simple 2-wire connection is compatible with most HVAC zone control boards and standard 24VAC transformers.

Can the ZDS-30X8 be used in high-pressure commercial ducts?
This model is rated for static pressures up to 1.0" W.C. For systems exceeding this pressure, a heavy-duty industrial damper may be required to prevent blade blow-through or motor stall.

Does this damper require a specific orientation during installation?
As a side-mount (ZDS) model, the motor is located on the height (8") dimension. It can be installed in any position within the duct as long as the motor is accessible for wiring and the blades move freely without obstruction.

Is it possible to adjust how much air bypasses when the damper is closed?
Yes, the unit features an adjustable minimum position screw. By loosening this screw, you can set a mechanical stop that prevents the blades from closing 100%, allowing a controlled amount of air to bleed through for pressure relief.

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.