iO HVAC Controls HD-MOTOR-RR Damper Actuator

The iO HVAC Controls HD-MOTOR-RR is a 2-wire, 24VAC spring-return damper actuator designed as a replacement motor for compatible iO HVAC Controls HD-Series rectangular and D-Series round zone dampers.

This actuator provides spring-return operation for dependable airflow positioning in HVAC zoning and fresh-air applications. The HD-MOTOR-RR can replace the previous HD-MOTOR and supports retrofit installations using the appropriate shaft adapter.

For D-Series round dampers with a 5/16-inch shaft, the DDC-S adapter converts the shaft to 1/2 inch. HD-Series rectangular dampers can use the CD-ZD-SD-EB adapter for 3/8-inch square-to-1/2-inch round conversion.

Before installation, verify the existing damper series, shaft size, spring-return position, wiring, mounting arrangement, and control sequence.

Key Benefits

• Manufacturer: iO HVAC Controls
• Part Number: HD-MOTOR-RR
• Product Type: HVAC Damper Actuator / Replacement Damper Motor
• Voltage: 24VAC
• Wiring: 2-wire
• Spring-return actuator design
• Replacement for the previous HD-MOTOR
• Compatible with applicable D-Series round zone dampers
• Compatible with applicable HD-Series rectangular zone dampers
• Supports retrofit installations using application-specific shaft adapters
• DDC-S adapter accommodates applicable 5/16-inch round damper shafts
• CD-ZD-SD-EB adapter accommodates applicable 3/8-inch square rectangular damper shafts
• Suitable for HVAC zoning and compatible fresh-air damper applications

Common Questions

What is the iO HVAC Controls HD-MOTOR-RR?
The HD-MOTOR-RR is a 2-wire, 24VAC spring-return actuator used to replace the motor on compatible iO HVAC Controls zone and fresh-air dampers.

Does the HD-MOTOR-RR replace the older HD-MOTOR?
Yes. The HD-MOTOR-RR is used as a replacement actuator for applicable dampers previously equipped with the HD-MOTOR. Verify the shaft configuration before installation.

Can the HD-MOTOR-RR be used on round dampers?
Yes, it can be used with compatible D-Series round dampers. Some installations require a DDC-S 5/16-inch-to-1/2-inch shaft adapter.

Can it be used on rectangular dampers?
Yes. It can also be used with compatible HD-Series rectangular dampers. Depending on the existing shaft configuration, a CD-ZD-SD-EB 3/8-inch-square-to-1/2-inch-round shaft adapter may be required.

Is the HD-MOTOR-RR a 24V actuator?
Yes. It is designed for 24VAC HVAC control applications and uses a 2-wire connection.

How do I verify compatibility?
Check the existing damper series, shaft dimensions, actuator mounting arrangement, wiring, control sequence, and required spring-return position before replacing the existing motor.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

HD-MOTOR-RR is the cross for HD-MOTOR