Installation Guide
Table Of Contents
21
Installation of Refrigerant
Piping
● The piping between the last-level branch pipe and IDU should have the same size
with the IDU connecting pipe.
● The pipe between branch pipes should be based on the total capacity of downstream
IDUs connected to the pipe.
Total capacity of
connected IDUs (kw)
Liquid Pipe
Specifications (mm)
Gas Pipe
Specifications (mm)
X<16.8 Φ 9.52 Φ15.88
16.8 ≤ X < 22.5 Φ9.52 Φ19.05
22.5 ≤ X < 33.0 Φ9.52 Φ22.23
33.0 ≤ X < 46.0 Φ12.7 Φ25.40
46.0 ≤ X < 67.0 Φ15.88 Φ28.58
67.0 ≤ X < 94 Φ19.05 Φ31.75
X ≥94
Φ19.05 Φ34.92
Remarks: The size of the piping between branch pipes shall not be greater than that of the
cooper pipe of the main pipe in the figure above.
Installation of branch pipes
● Branch pipes should be selected based on the total capacity of downstream IDUs
connected:
Total capacity of downstream IDUs
connected to branch pipes (kw)
Model of branch pipes
X<16.8 TBP4022TA
16.8 ≤ X < 22.5 TBP4022TA
22.5 ≤ X < 33.0 TBP4033TA
33.0 ≤ X < 46.0 TBP4072TA
33.0 ≤ X < 46.0 TBP4072TA
X ≥ 67.0 TBP4073TA
For branch pipe component installation, the model of branch pipe components and
the diameters of connected main pipe and branch pipe should be confirmed
according to the construction drawings and installation instructions. There should not
be sharp turns (90° angle) or other branch pipe components falling within 500 mm of
branch pipe components. The straight pipe distance between two adjacent branch
pipes should not be less than 1000 mm.