Trane 4TXM2318BF300AA Service Manual page 38

CAUTlON
In order to drain water normally, the drain pipe shall be processed as specified in the installation manual and shall
be thermal insulated to avoid dew generation. Improper hose connection may cause indoor water leakage.
Requirements
• The indoor drain pipe shall be thermal insulated.
• The connection part between the drain pipe and the indoor
unit shall be insulated so as to prevent dew generation.
• The drain pipe shall be slant downwards (greater than
1/100). The middle part shall not be of stype elbow,
otherwise abnormal sound will be produced.
• The horizontal length of the drain pipe shall be less than
20m. In case of long pipe, supports shall be provided every
1.5-2m to prevent wavy form.
• Central piping shall be laid out according to the right figure.
• Take care not to apply external force onto the drain pipe
connection part.
• For unit with water pump drain pipeuse hard PVC general
purpose pipe VP which can be purchased locally. When
connecting, insert a PVC pipe end securely into the drain
socket before tightening securely using the attached drain
hose and clamp. Adhesive must not be used for connection
of the drain socket and drain hose (accessory).
Pipe and Insulation Material
Insulation
Pipe Rigid PVC Pipe VP20 mm (Internal Diameter)
Foamed PE with Thickness Above 7 mm
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