Responding to Sparky's query: No. The disconnect has to be in sight FROM the HVAC unit. So a door with a window wouldn't work. I know you were only kidding, but some folks like to push rules to the limit, so they might try to get away with that suggestion.
Mvillines, interesting how the words can get equivocal. I never focused on the way the two expressions are used in the Code for seemingly the same scenario. But, for me,"grouped" means kept close together (where "close" depends on the practical context - as B-Bren mentions), and "adjacent" means being close, but not necessarily TOGETHER, and not necessarily on the same wall space, but perhaps around the inside corner of a wall.
I don't know..does this make sense?