The York S1-6109896 3HP VFD Controller Programmed is a variable frequency drive controller designed to regulate compatible HVAC motor operation. It works by adjusting the frequency and voltage supplied to a motor, allowing precise control of motor speed according to system demand. Used in York commercial HVAC equipment, including air handlers and other motor-driven systems, this progr... https://www.partshnc.com/s1-6109896-york-3hp-240v-3ph-programmed-vfd