Here's some reading material for you.
Hope it helps.
Thank you. I found the sequence of operation in that 192 (!!!!!) page document.
That is sure to help. I will start on it this weekend. My boss has been giving
me a questioning look these past few days--"Can this guy handle this account?"
It is going to take a few more service calls to calm those fears. Unlike residential,
commercial doesn't have some homeowner standing there watching you while
you work. So I can think much more clearly without that "help." I'll figure
it out with all of this documentation and my secret HVAC-Talk weapons!
Thanks again to everyone.