Carrier 53QG18-H Installation Manual

20INSTALLATION OF INDOOR UNITS (Cont.)INSTALLATION STEPS OF INDOOR UNIT (Cont.)NOTES:a. Fasten the wall hang bracket to the wall withall the 5 (Five) screws supplied with unit.This correct fixation will prevent motion ofbracket after fixation, which can cause noisyunit operation.b. The wall hang bracket must be leveled in bothhorizontal and vertical directions after fixationwithout tilting to the right or lift to avoid waterdropping from the unit onto the floor. See Fig.c. Install the wall hang bracket so that three isno gap between it and the wall to avoidvibrations and sound during unit operation.d. Check that the wall hang bracket does notmove.This can cause noise during operation.Step (6): Electrical wiring of indoor unit See chapter (18) : Connecting Electrical Wiring.Step (7): Forming refrigerant piping drainhose and electrical cables ofindoor unit.• As per the selected location of wall hole,form and tie together with vinyl tape therefrigerant piping, electrical cables anddrain hose.The drain hose should be at the bottom.• For left piping fit the refrigerant piping,electrical cords and drain hose into therecess at back of indoor unit.Notes:a. Do not crush or kink the indoor unit piping.Avoid tight bending with a bending radiusless than 100 mm.b. Do not bend the same part of the pipe toooften.c. Do not remove the flare nuts from the indoorunit piping until the piping is ready forconnection with refrigerant piping lines.XAn Uneven InstallationIndoor unit pipingDrain hoseBind with vinyl tapeLeft PipingIndoor unitpipingConnectioncables