Io Hvac Controls TD-2820 Rectangular Zone Damper 28x20

Product Description

The IO HVAC CONTROLS TD-2820 is a rectangular zone damper designed for use in zoned forced-air HVAC systems. It ships with a Belimo 3-wire actuator pre-mounted, allowing the damper blade to modulate or open and close in response to zone controller signals. At 28 inches wide by 20 inches tall, it handles large duct trunk lines common in residential and light commercial applications. The 3-wire actuator configuration supports spring-return fail-safe operation, which closes or opens the blade on loss of power depending on actuator setup. Licensed HVAC technicians and sheet metal installers are the typical trade for this component.

This damper is specified for Trane and American Standard zoning applications where duct dimensions call for a 28-by-20-inch rectangular damper. It fits into zoned systems that use low-voltage zone controllers to manage airflow distribution across multiple conditioning zones. The included Belimo actuator integrates directly with standard 24-volt zone control panels. Typical install scenarios include trunk-and-branch duct systems in residential new construction and retrofit zoning projects where a large rectangular bypass or zone damper is required.

Key Features

• Pre-mounted Belimo 3-wire actuator eliminates field actuator selection and mounting
• 28-inch by 20-inch rectangular blade size suits large trunk duct applications
• 3-wire actuator wiring supports both modulating and on/off zone control panels
• Spring-return fail-safe actuator operation provides default blade position on power loss
• Built for Trane and American Standard zoning system compatibility

Compatibility

Designed for use with Trane and American Standard rectangular zone damper applications requiring a 28-by-20-inch damper with a Belimo 3-wire actuator.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zoning wiring and duct fabrication. Shut off the air handler or furnace and de-energize the zone control panel before mounting the damper or connecting actuator wiring. Secure the damper into the duct section using sheet metal screws and seal all edges per applicable mechanical code requirements. Verify actuator travel direction and fail-safe position match system design before restoring power.