How to Install a Roof Air Conditioner in an RV

1). Climb the ladder to the roof of the RV. Make a square on the roof big enough to fit the connections between the ceiling portion of the unit and the roof portion of the air conditioner. Make sure the spot is free of interior obstructions.
2). Double check the measurements of the air conditioning unit. Mark the locations of the mounting bolts. Drill the holes in the corners of the square.
3). Saw a hole in the roof where the air conditioner will go. Install the roof portion over the hole. Secure the unit with the mounting bolts.
4). Return inside the RV and install the bolts that hold the ceiling portion in place. Mount the ceiling unit and secure it to the roof unit.
5). Apply sealant where the air conditioner meets the roof. Connect all the wires and plug the ceiling unit into the roof unit.