I use my decade of servicing York, Trane, Carrier, & Daikin chillers to show you why and how these units work, join me here https://chilleracademy.com/p/intro-to-chillers We installed some ABB 580 vfd in a chiller plant retrofit. We are retrofitting the plant to Multi Stack chillers from Trane water cooled screws. We changed out the pump skids and converted them to variable speed. The start stop on a ABB vfd with bypass gets a lot of hvac technician tripped up.