Understandable but everyone had to start somewhere and either asked for help or learned through experience.
I understand the need for this to be done properly and why I seek advice here.
I just spent some time reading through the manual and think I understand how to run it and why a similar unit wasn't working properly on a past gig. Also, some things I assumed were not correct. Probably should have done that first before seeking advice and seeming ignorant.
I agree that everyone has to start somewhere. Getting advice on which speakers to use or how to connect a powered box vs a passive, etc. is a good use for a forum like this. If you already have a good basic understanding of power and distribution, this is not a bad place to gt a clarification or learn the best way to deal with unusual circumstances.
Frankly, your OP shows a serious lack of basic understanding. This post mentions "things I assumed". When dealing with power doing it wrong can be very expensive-if you are lucky. Doing it wrong can leave you or others dead.
The story about having it setup to run incandescent lighting on 277/480 and having it stall scares me-switching it to 120/208 3 phase or 120/240 single phase should not have worked with incandescent lighting setup for 277/480 (maybe it could on some newer flourescent ??). You need to get a skilled
electrician involved-that is a much smaller group than those who call themselves "electricians." Spend the money to make sure it is right. Even if it "works", it may not be safe because of bonding & grounding-safety concerns that way too many non-electricians have no clue and no concern regarding.