Rheem-Ruud 51-42179-01 Motor

The Rheem-Ruud 51-42179-01 Condenser Fan Motor is a high-performance direct-drive replacement motor designed for heavy-duty residential and light commercial condensing units. This 1/3 HP HVAC motor operates at 1075 RPM and is engineered for 208-230V single-phase applications, drawing 1.8 Amps at full load. Built with a NEMA 48 frame, this motor features a totally enclosed air over (TEAO) enclosure, specifically designed to protect internal windings from environmental debris and moisture during operation in the outdoor airstream. The sleeve bearing design provides quiet operation, while the 1/2" x 3-11/16" shaft is optimized for standard fan blade attachment. As a Permanent Split Capacitor (PSC) motor, it requires a precision-matched run capacitor to ensure optimal torque and thermal efficiency. The CCW rotation (lead end) and shell-band/shell-screw mounting options allow for versatile installation across various outdoor heat pump and AC configurations. Using genuine OEM Rheem-Ruud parts ensures the mechanical integrity and thermal protection necessary to prevent compressor overheating and maintain system head pressure.

• OEM Precision Fit: Engineered specifically for Rheem and Ruud units to eliminate mounting modifications and ensure proper static pressure performance.
• Enhanced Protection: The totally enclosed enclosure prevents dust and moisture ingress, critical for maintaining service life in harsh outdoor conditions.
• Thermal Efficiency: Designed for continuous duty with internal thermal overload protection to prevent winding failure during high-ambient operation.
• Versatile Mounting: Features both shell-band and shell-screw mounting capabilities for quick field replacement in NEMA 48 frame applications.

What is the correct rotation for this motor?
The 51-42179-01 is a CCW (Counter-Clockwise) rotation motor when viewed from the lead end. Always verify the fan blade pitch matches this rotation to ensure proper airflow through the condenser coil.

Does this motor require a specific capacitor?
Yes, as a Permanent Split Capacitor (PSC) motor, it must be paired with the MFD rating specified on the nameplate. Installing a new capacitor at the same time as the motor is a best practice to prevent premature failure.

Can this replace an ECM condenser motor?
This is a standard PSC motor. While physical mounting may be similar, replacing an ECM with a PSC typically requires wiring modifications and the addition of a run capacitor, which should only be performed by a qualified technician.

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.