What are you trying to achieve by training? I mean, are you trying to become a chiller technician, are you looking after some chillers already & want to know how they operate, are you a dx system designer & need to know how to design for chilled water systems?

Trane, and I assume the others, have various training courses tailored to what you're doing - Working in the industry & just need an understanding, Designer, Facilities Maintenance, Service Technician, etc.