Lennox 12Y17 Motor

If you are looking for a reliable Lennox 12Y17 Blower Motor, this 460V 3-Phase powerhouse is the industry standard for commercial air handlers and large-scale furnace applications. Designed for high-duty cycles, this 3 HP motor runs at a 1750 RPM nominal speed and features a 56HZ frame. This unit is the direct replacement for Lennox 34W47, as well as legacy part numbers 79W66 and 101501-02, ensuring a drop-in fit for your existing blower assembly without the need for mounting modifications.

Built with ball bearings for horizontal mounting and a reversible rotation (CW/CCW) design, the 12Y17 motor provides maximum flexibility for various ductwork configurations. The 3.9 Amp full load rating and thermal protection with automatic reset ensure it can handle the static pressure demands of commercial blowers. When swapping this 3-phase HVAC motor, always check the blower wheel for balance to prevent premature vibration-related failure in the drive train.

Key Benefits

• OEM Compatibility: Direct fit for Lennox units and replaces discontinued 34W47 and 103204-08 models.
• Industrial Durability: Features heavy-duty ball bearings and a 56HZ rigid base for stable, long-term operation.
• Versatile Application: Reversible rotation allows for easy integration into multiple air delivery systems.
• Efficient Performance: Optimized for 460V power supplies with a precision 1750 RPM shaft speed for consistent airflow.

Common Questions

Can I use the 12Y17 to replace a single-phase motor?
No. This is a 3-phase motor and requires a 460V 3-phase power supply and compatible starter or drive. Using it with single-phase power will result in immediate failure.

What should I check if the motor hums but won't start?
Check for a seized blower wheel or an open winding. Transitioning from the older 34W47 may also require verifying your lead connections for proper phase rotation.

Are the shaft dimensions identical to the 34W47?
Yes, it maintains a 7/8-inch shaft diameter and approximately 2.25-inch length, ensuring your existing blower pulleys or wheels fit standard 56HZ specs.

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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.