13Basic definitionsUnit hand — When facing the supply air outlet from thefront of the unit (air blowing in your face), your right handwill be the right hand side of the unit and your left hand theleft hand side of the unit.Same end connection (2 pipe or 4 pipe) — All pipingconnections are on the same end (side) of the unit. Con-trols and electrical connection will be on the end (side)opposite the piping connection.Standard 2-pipe units will be the same end connection.Opposite end connection (4-pipe option) — Hotwater (HW) piping connections and electrical will be on theend (side) opposite the chilled water (CW) and drainconnections.Application dataUNIT HANDSAME END CONNECTIONNOTE: Piping determines the hand of the unit.OPPOSITE END CONNECTIONNOTE: Chilled water piping determines the hand of the unit.