I am installing an updraft 3 ton system with the evaporator on top of the furnace. They fit nicely, but I'm not sure which front-or-back orientation the top unit should be in.
In the attached picture, the copper refrigerant lines are up front, as is the condensate drain, and they're all on the left of the unit. The 1/2" iron pipe stub-out is also on that side, as are the electrical wires. So, everything is conveniently placed.
However, the flue vent is going to go up vertically, and will be just about 3/8" or less away from the coil access panel, as well as the paper product label, and the coil access panel will be difficult to remove.
On the other hand, if I flip the evaporator unit, There's closer to an inch of clearance between flue and evaporator unit (the lips match up differently but it's a tight fit), though now the copper and condensate lines are to the rear.
I really prefer the first setup with the panel accessible. Is that OK? Do I need to elbow the flue away from the unit before I go vertical? Or should the copper/condensate go to the rear as well as the panel? Appreciate your help!