Resideo zd24x20tz/u Zone Damper 24x20 in 2-position 24V

Product Description

The RESIDEO zd24x20tz/u is a parallel-blade zone damper designed for use in residential and light commercial HVAC zoning systems. Operating on 24 volts, this damper uses a 2-position, spring-return actuator that drives the blades fully open or fully closed based on a signal from the zone control panel. At 24 inches wide by 20 inches tall, it fits rectangular duct sections and provides reliable zone isolation to match conditioned air delivery with thermostat demand. HVAC technicians install this damper as part of a multi-zone forced-air system to balance comfort across independently controlled areas.

This damper is suited for residential forced-air zoning applications where the supply duct layout calls for a parallel-blade design. The spring-return function ensures the damper returns to its fail-safe position on power loss, which is an important consideration for system design and safety. Typical installations place this unit in a main trunk or branch duct serving a dedicated zone, with low-voltage wiring routed back to a compatible zoning control panel.

Key Features

• Parallel-blade configuration for efficient airflow control across the full duct opening
• 2-position operation: fully open or fully closed, controlled by zone panel signal
• Spring-return actuator returns damper to fail-safe position on loss of power
• 24-volt low-voltage control compatible with standard zoning control panels
• 24 inches x 20 inches rectangular duct size fits common residential and light commercial trunk layouts

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for 24-inch by 20-inch rectangular duct openings in forced-air HVAC zoning systems using 24-volt, 2-position control wiring.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with forced-air zoning systems and low-voltage control wiring. Power down the air handler and de-energize the zone control panel before making any wiring connections. The damper must be mounted with attention to airflow direction as marked on the unit, and sheet metal screws are typically used to secure the damper frame to the duct. Follow local mechanical codes and the zoning control manufacturer's wiring diagram when connecting the 24-volt actuator leads.

Technical Specifications

• Damper Width: 24 inches
• Damper Height: 20 inches
• Blade Configuration: Parallel
• Control Voltage: 24 volts
• Actuator Type: 2-Position Spring Return

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: zd24x20tz/u