Trane MOT8915 Motor

The Trane MOT8915 is a high-efficiency condenser fan motor designed for specific residential air conditioning units and heat pump systems. This 1/8 HP motor operates on a 208-230V single-phase power supply at a fixed speed of 1075 RPM. Built with a NEMA 42 frame size, it features an open air over (OAO) enclosure to ensure maximum heat dissipation during continuous duty cycles in demanding outdoor environments. This OEM Trane replacement motor utilizes a permanent split capacitor (PSC) design, requiring a 5 MFD / 370V capacitor for optimal torque and efficiency. When diagnosing a failed outdoor fan, verify the 42-frame diameter and shaft dimensions to ensure a precise fit within the motor mount bracket. Using this genuine Trane MOT8915 motor ensures the static pressure and CFM requirements of the original equipment are maintained, preventing compressor overheating or coil icing issues common with generic universal replacements.

Technical Specifications and Key Benefits:

• Direct OEM Replacement: Ensures electrical compatibility and physical fitment for Trane and American Standard condenser units.
• Sustained RPM Performance: Rated at 1075 RPM to provide consistent airflow across the condenser coils for thermal exchange.
• Durable Construction: Features all-angle sleeve bearings or ball bearings (model specific) for reliable performance in vertical or horizontal mounting positions.
• Optimized Power Draw: Designed for low amperage consumption on 208-230V circuits to maintain system EER ratings.
• Weather Resistance: Built with high-grade insulation to withstand moisture and temperature fluctuations inherent in HVACR outdoor applications.

Common Installation and Compatibility Questions:

What is the frame size and diameter of the MOT8915?
This motor utilizes a 42-frame diameter, which is approximately 5 inches. It is essential to confirm that your mounting belly band or studs align with this frame size, as it is smaller than the standard 48-frame motors found in larger tonnage units.

Can I use a different capacitor than the one specified?
No. The Trane MOT8915 requires a specific 5 microfarad (MFD) 370-volt capacitor. Using an incorrectly rated capacitor will lead to winding failure, excessive heat, and premature motor burnout.

Is this motor reversible for different airflow directions?
Most MOT8915 motors are factory-set for a specific rotation (typically CWLE or CCWLE). Always check the lead wire color coding and rotation arrow on the nameplate against your existing condenser fan pitch before finalizing the installation.

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.