Customer had a side discharge RTU that needed replacement. Roof products salesman sold him a roof coating that was 6" thick and coated up to RTU panels. Pullung this would have left a huge hole on roofing.
I told customer, let's leave it and put new RTU over duct-roof penetration.
Whats wrong with that?
I think the unit on the left is just sitting there. It was previously installed on the curb to the right, but they took it off and set it aside and put a new unit on.
Looks suspicious indeed. Could it be that the owner of the building informed hvac/r contractor to leave it on roof so it could be seen by insurance, warranty company, other. Probably more along the lines of a couple of guys not feeling like rigging another unit that day. Could be that Helicopter received call to replace Donald Trumps Rooftop, WHO KNOWS, but as you know you've seen it all until you get to work today!