Io Hvac Controls D-09-PO Round Zone Damper 9 in

Product Description

The IO HVAC CONTROLS D-09-PO is a 9-inch round two-position zone damper configured for powered-open operation. Zone dampers regulate airflow through duct sections in forced-air zoning systems, directing conditioned air only to occupied or calling zones. The powered-open design means the actuator drives the blade to the open position on demand, with spring or gravity return to closed when de-energized. HVAC technicians install this damper as part of a multi-zone control system, typically alongside a zone control board and individual thermostats. At 6 pounds, the unit is substantial enough for durable duct installation in residential and light commercial applications.

This damper is suited for residential and light commercial forced-air zoning installations where round ductwork is used. It fits into a 9-inch round duct section and is controlled by a zone panel that sends a signal to open the blade when a zone calls for heating or cooling. The powered-open configuration is common in systems where positive actuation is required to move air to a specific zone, and the damper closes when the zone call ends.

Key Features

• 9-inch round duct sizing for standard residential and light commercial round ductwork
• Two-position operation: fully open or fully closed for precise zone control
• Powered-open actuator drives the blade open on zone call
• Compatible with standard zone control boards that provide low-voltage switching signals
• Durable construction rated for long-term installation in concealed duct systems

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for 9-inch round duct zoning systems controlled by low-voltage zone control panels.

Installation Notes

Installation is performed by a licensed HVAC technician familiar with forced-air zoning systems and low-voltage wiring. Power down the zone control panel and disconnect low-voltage wiring before servicing or replacing a damper. Secure the damper into the duct section per the manufacturer's instructions and verify blade travel is unobstructed before reconnecting control wiring. Low-voltage wiring practices should comply with applicable NEC guidelines for Class 2 circuits.