Io Hvac Controls LD-09 Round Zone Damper 9 Inch 2 Position

Product Description

The IO HVAC CONTROLS LD-09 is a 9-inch round, 2-position zone damper designed for use in forced-air HVAC zoning systems. It ships with a 3-wire actuator and an integrated LED indicator that confirms blade position at a glance. The damper cycles between fully open and fully closed, making it suitable for zone-control applications where modulating airflow is not required. Licensed HVAC technicians install this unit as part of a multi-zone control system, typically alongside a zone control board and low-voltage thermostat wiring. The 3-wire actuator interface is compatible with standard 24-volt zone controllers.

This damper is used in residential and light commercial duct systems where individual zones need independent airflow control. It fits into 9-inch round ductwork and is appropriate for new construction as well as retrofit zoning projects. The LED indicator makes it easy to verify damper status during commissioning or service calls without opening the duct. Typical installations include trunk-and-branch duct layouts, side-wall takeoffs, and branch runs serving individual rooms or zones.

Key Features

• 9-inch round duct size fits standard trunk-and-branch and branch-run duct configurations
• 2-position operation (fully open / fully closed) for straightforward zone control
• 3-wire actuator interfaces with 24-volt zone control boards
• Integrated LED indicator confirms blade position without opening the duct
• Compact actuator housing suits tight mechanical spaces

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for 9-inch round ductwork in residential and light commercial forced-air zoning systems.

Installation Notes

Installation is performed by a licensed HVAC technician. Power down the air handler and de-energize the zone control board before making any low-voltage wiring connections. Secure the damper in the duct run before connecting the actuator leads to the zone controller, following the controller manufacturer's wiring diagram. Verify LED indicator status and blade travel during system commissioning to confirm proper operation before returning the system to service.