Several years ago, Vertical Express had a week long training class in Memphis, Tenn. it was probably the best training class I have ever attended. The instructor's name was Robert Bowman, he was fantastic, we went through every line of electrical print. We went through the entire I-2 valve theory and setup. I do not know if they still offer this class. It was free, just had to fly there and pay hotel and food. They took us to the Thyssen factory in Walnut, Mississippi. And down the road to the factory where. Controllers are built and valves adjusted. If they offer this class, it is Awesome!! Give you books, and all the knowledge you need to install, and troubleshoot......Good Luck