On side mounted units you need to put a shroud around the unit so that all the hot air coming across the coils is 'piped' to the outside. If you don't do this, the hot air from the coils will be sucked around to the intake on the sides of the unit and just blow hotter air across the coils. It can get so hot that the head pressure on the unit will rise and shut the unit down. The units installed by TM had a piece of sheet metal from one side, over the top, and down the other side. It extended from the unit cabinet to the grille on the side of the trailer.
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Joe from Virginia
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