Io Hvac Controls SC-ZD-20 Modulating Zone Damper 20in

Product Description

The IO HVAC CONTROLS SC-ZD-20 is a modulating zone damper designed for commercial HVAC zoning systems. It controls airflow within a duct zone by adjusting blade position across a continuous range of travel rather than simple open/close operation. This modulating action allows precise airflow balancing, which is essential for variable air volume and multi-zone commercial applications. At 20.125 inches wide and 20.125 inches deep, with a profile height of 7.875 inches, the SC-ZD-20 is sized for larger commercial duct runs. Weighing 17.2 pounds, it is a substantial unit suited for permanent commercial installation. Licensed HVAC technicians and sheet metal mechanics are the typical installing trade.

The SC-ZD-20 is intended for commercial zoning applications where precise, modulated airflow control is required across a zone or branch duct. It is suited for multi-zone VAV systems, commercial air handlers, and larger duct distribution networks where a round or rectangular 20-inch duct fitting is present. This damper is appropriate for light commercial and commercial HVAC builds and retrofits requiring reliable, repeatable zone control over extended duty cycles.

Key Features

• Modulating operation provides continuous airflow adjustment rather than binary open/close control
• 20-inch nominal size fits larger commercial duct applications
• Compact depth of 20.125 inches accommodates standard commercial duct configurations
• Robust construction at 17.2 pounds supports long-term commercial duty cycle use
• Designed for integration into commercial zoning control systems

Compatibility

Designed as an OEM-style modulating zone damper for commercial HVAC zoning systems requiring a 20-inch damper assembly.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic familiar with commercial zoning systems. Shut down and de-energize the air handling unit and all associated controls before beginning installation. Ensure the control wiring to the damper actuator complies with applicable NEC requirements and the zoning system manufacturer wiring specifications. Do not force the damper blades manually during commissioning, as this may damage the actuator mechanism.

Technical Specifications

• Width: 20.125 inches
• Height: 7.875 inches
• Depth: 20.125 inches
• Weight: 17.2 pounds

Standard Information

• Brand: IO HVAC CONTROLS
• Manufacturer Part Number: SC-ZD-20