Installation Guide

20
Installation of Refrigerant
Piping
Direct selection of refrigerant piping
The copper pipe for main pipelines (LM) shall have the sizes chosen from the following table based on
the total capacity of ODUs at the upper reaches (the ones unlabeled can be generally applied)
ODU
capacity
(HP)
Piping length (LM + L1) < 90 m
Main pipe length (LM) < 40 m
Piping length (LM + L1) < 90
m
Main pipe length (LM) > 40 m
Piping length (LM + L1)> 90 m
Liquid pipe (mm)
Gas pipe
(mm)
Liquid pipe (mm)
Gas pipe
(mm)
Liquid pipe (mm)
Gas pipe
(mm)
8
9.52(-SA/ST)
12.7(-S/CSRYA)
22.23
9.52(-SA/ST)
12.7(-S/CSRYA)
25.4
12.7(-SA/ST)
15.88(-S/CSRYA)
25.4
10
9.52(-SA/ST)
12.7(-S/CSRYA)
22.23
9.52(-SA/ST)
12.7(-S/CSRYA)
25.4
12.7(-SA/ST)
15.88(-S/CSRYA)
25.4
12
12.7
25.4
12.7
28.58
15.88
28.58
14 12.7 28.58 12.7 31.75 15.88 31.75
16 12.7 28.58 12.7 31.75 15.88 31.75
18
12.7(-SA/ST)
15.88(-S)
28.58
12.7(-SA/ST)
15.88(-S)
31.75
15.88(-SA/ST)
19.05(-S)
31.75
20
15.88
28.58
15.88
31.75
19.05
31.75
22 15.88 28.58 15.88 31.75 19.05 31.75
24 15.88 28.58 15.88 31.75 19.05 31.75
26 19.05 31.75 19.05 34.92 22.23 34.92
28
19.05
31.75
19.05
34.92
22.23
34.92
30 19.05 31.75 19.05 34.92 22.23 34.92
32 19.05 31.75 19.05 34.92 22.23 34.92
34 19.05 34.92 19.05 38.1 22.23 38.1