Trane 4TXM2318BF300AA Service Manual page 35

• Each of the air sending duct and air return duct shall be fixed on the prefabricated panel of the floor by the iron
bracket. The recommended distance between the edge of the air return duct and the wall is over 150mm.
• The gradient of the condensate water pipe shall keep over 1%.
• The condensate water pipe shall be thermal insulated.
• When installing the ceiling Concealed type indoor unit, the air return duct must be designed and installed as figure
shown
1. Installation of Air sending duct
• This unit uses rounded duct, the diameter of the duct is
180mm.
• The rounded duct needs to add a transition duct to connect
with the air-sending duct of indoor unit, then connect
with respective separator. As Figure shown, all the fan
speed of any of the separator's air outlet shall be adjusted
approximately the same to meet the requirement for the
room air conditioner.
2. Installation of Air Return Duct
• Use rivet to connect the air return duct on the air return
inlet of the indoor unit, then connect the other end with the
air return blind as figure shown.
3.Thermal Insulation of Duct
• Air-sending duct and air return duct shall be thermally
insulated. First stick the gluey nail on the duct, then attach
the heat preservation cotton with a layer of tinfoil paper and
use the gluey nail cap to fix. Finally use the tinfoil adhesive
tape to seal the connected part. As figure shown.
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