Io Hvac Controls TD-04 Round Zone Damper 4 Inch 24V

Product Description

The IO HVAC CONTROLS TD-04 is a 4-inch round zone damper designed for use in ducted HVAC zoning systems. It ships with a 60-second, 3-wire, 24-volt AC Belimo-compatible actuator already paired to the damper assembly, eliminating the need to source a separate actuator on the job. The damper controls airflow through a 4-inch round duct by opening and closing on a timed cycle driven by the actuator. Licensed HVAC technicians install this part during new zoning installations or as a replacement in existing low-voltage zone control systems.

This damper is intended for residential and light commercial ducted air distribution systems where zone-by-zone airflow control is required. It fits inline in 4-inch round ductwork and is driven by a 24-volt AC control signal from a zone control board or thermostat. The included actuator is rated for a 60-second open-to-close cycle, which is standard for most residential zoning panel requirements. The assembly is noted as compatible with Trane AS zone systems, making it a direct fit for service work on those installations.

Key Features

• 4-inch round duct damper for inline zone airflow control
• Integrated 60-second, 3-wire, 24-volt AC actuator included
• Belimo-compatible actuator design suits a wide range of zone control panels
• Compatible with Trane AS zone control systems
• Ready-to-install assembly reduces field sourcing time

Compatibility

Compatible with Trane AS zone control systems. The actuator is Belimo-compatible and designed to work with 3-wire, 24-volt AC zone control panels commonly used in residential and light commercial zoning applications.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zoning systems. De-energize the zone control panel and confirm 24-volt AC power is off before wiring the actuator. Secure the damper inline in the duct run per the zone system layout, and verify polarity and wire assignments against the zone board documentation before restoring power. Follow applicable mechanical and electrical codes during installation.