ZoneFirst AOBD-16X8 Damper

The ZoneFirst AOBD-16X8 is a professional-grade automatic opposed blade damper designed for rigorous HVAC zoning system applications. Featuring a 16" wide by 8" high frame, this motorized rectangular damper utilizes an opposed blade design to minimize air turbulence and provide superior linear airflow control compared to standard bypass dampers. The unit is powered by a high-torque 24VAC power open/power closed actuator, ensuring positive seal and reliable operation in high-static environments up to 0.75" W.C. A critical feature for contractors is the integrated built-in end switches, which allow for seamless electrical interlocking with auxiliary equipment or verification of damper position at the zoning control panel. The actuator is side-mounted on the 8" dimension, facilitating a low-profile installation in tight plenum spaces. Built to withstand extreme mechanical rooms, it maintains a wide operating temperature range from -55°F to 200°F.

Key Benefits for HVAC Professionals

• Precision Air Balancing: The opposed blade orientation ensures even pressure distribution throughout the duct run, preventing "hot spots" in the forced-air zoning layout.
• Synchronized System Feedback: Internal end switches eliminate the need for external relays when sequencing fans or verifying damper actuator status.
• Simplified Field Wiring: Robust screw terminal connections accommodate standard 18-gauge thermostat wire for fast, secure integration.
• Two-Position Control: The PO/PC motor provides 30-second travel times, offering a stable and predictable response for residential and light commercial airflow requirements.

Common Installation Questions

What is the power draw for this damper?
The AOBD-16X8 operates on a 24V 60Hz circuit and draws approximately 6 Watts (10VA) during motor travel. Ensure your 24VAC transformer is sized correctly for the total number of zones in the system.

Can the actuator be replaced without removing the damper?
Yes, the motorized zoning damper is designed with a field-serviceable actuator mounted on the 8" side, allowing for direct replacement if necessary without breaking the duct seal.

How do the end switches assist in system protection?
The end switches provide a dry contact closure once the damper reaches its full position, which is essential for technicians setting up purge cycles or secondary fan interlocks in HVAC airflow control setups.

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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.