Google and Youtube can provide you with exposure to the information you seek.... as well as some amusement once you become arrogant.........................Good luck.
It's All about Heat.............................to a degree
You can get a boatload of information from the Carrier Commercial site. HVAC Partners is another site that has lots of information if you have the patience and they allow you. Both Trane and York equipment IOMs are fairly easy to find on the internet.