OEM Rheem / RUUD ECM Condenser Motor Condenser Motor / Outdoor Commonly Found in Various Rheem / Ruud Units Replaces / Supersedes: 51-102728-20 5110272820 102728 662766555530 and Similar ECM Rheem/Ruud Motors. Rheem Ruud PROTECH OEM ECM Condenser Motor The PROTECH series of quality whole HVAC motors are designed to fit a variety of common aftermarket applications. Additionally, they are approved as OEM replacements for many Rheem, Ruud, and WeatherKing models. Specifications: ECM Condenser Motor Note : Images are for illustration only. Actual part could vary.