I just had new AC installed - a 4 ton Bryant 538A system (tall & skinny system)
I looked at the literature, and it says it should be level. It was installed on a driveway which has a slight slope, so it isn't level.
When i put a level on it, I'm off of level - I only have a little torpedo level so don't know how badly off level, but at least 1/4" per 12" run.

So - is this something I should be concerned about?
Or is it likely close enough?
The slope is such that the end away from the lineset is lower if that matters.