The YORK S1-6111672 3HP Programmed Variable Frequency Drive Controller is an HVAC control component designed for compatible 240V, three-phase motor applications. It regulates motor speed by adjusting the frequency and voltage of the electrical power supplied, helping match equipment operation to changing heating and cooling demands. This controller is used in compatible YORK commercia... https://www.partshnc.com/s1-6111672-york-3hp-programmed-variable-frequency-drive-controller-240v-3ph