Resideo ZD12X20TZ Damper

The Resideo ZD12X20TZ is a heavy-duty, 12" x 20" rectangular zone damper engineered for precision airflow management in TrueZONE and other 24V electronic HVAC zoning systems. This parallel blade zone damper features high-integrity extruded aluminum construction, ensuring long-term structural stability and a low leakage rate of less than 1% at 0.5 in. WC. Designed for fail-safe normally open operation, the integrated ZD series 24Vac actuator utilizes a synchronous motor to power the blades closed during active zoning calls, while a robust spring return mechanism ensures the damper reverts to the open position upon power loss. The synchronous motor is strategically bottom-mounted on the 20" side, specifically tailored for 12" high by 20" wide duct configurations. With a 30-second power-close and 10-second spring-return timing, this unit provides immediate response to zone thermostat demands without excessive static pressure spikes.

• Mechanical Visual Indicator: Allows for immediate onsite verification of damper blade position (Open/Closed).
• Universal Mounting Flexibility: The multi-poise actuator and 4-inch frame depth permit installation in any orientation within the ductwork.
• Low Pressure Drop: Optimized parallel blade design maintains system efficiency with a minimal pressure drop of 0.0329 in. WC at 800 FPM.
• Two-Wire Installation: Simplified wiring to the Honeywell TrueZONE panel using M1 (Power) and M6 (Common) terminals, with an optional M4 terminal for LED status.
• High Static Pressure Rating: Rated for operation in systems with static pressures up to 1.0 in. WC.

Commonly Asked Questions

Can the ZD12X20TZ be used as a fresh air intake damper?
No. This model is a power-closed/spring-return-open unit. For fresh air or combustion air intake applications requiring a normally closed position, an EARD series damper should be used.

What happens during a power failure?
The internal spring return automatically opens the blades, ensuring that the zone remains open to prevent restricted airflow or high static pressure in the event of a control system failure.

Is the actuator replaceable?
Yes, the 24V synchronous motor is field-replaceable using a single set screw, allowing for maintenance without removing the entire damper frame from the ductwork.

This item is not eligible for free shipping.

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.