LG ARUB100LT3, Installation Manual

Page: 34 / 133

Pipe connections between indoor and outdoor unit
34 Outdoor Unit
WARNING
When the equivalent length between a outdoor and the farthest indoor unit
is 90m or more, main pipe(A) must be increased one grade.
Ú
Refrigerant pipe diameter from outdoor unit to first branch. (A)
h
If available on site, it use this size. Otherwise it can't be increased.
Upward outdoor
unit total capacity
Pipe diameter Pipe diameter when pipe length is 90m over to 1st branch
HP
Liquid
mm(inch)
Low pressure gas pipe
mm(inch)
High pressure gas pipe
mm(inch)
Liquid
mm(inch)
Low pressure gas pipe
mm(inch)
High pressure gas pipe
mm(inch)
8
9.52(3/8)
19.05(3/4) 15.88(5/8)
12.7(1/2)
22.2(7/8) 19.05(3/4)
10 22.2(7/8)
19.05(3/4)
25.4(1)
22.2(7/8)
12
12.7(1/2)
28.58(1-1/8)
15.88(5/8)
31.8(1-1/4)
14
22.2(7/8) 25.4(1)
16
18
15.88(5/8) 19.05(3/4)
20
22
34.9(1-3/8)
28.58(1-1/8)
38.1(1-1/2)
31.8(1-1/4)
24
26
19.05(3/4) 22.2(7/8)
28
30
32
34
36
41.3(1-5/8) 44.5(1-3/4)
38
40
42
34.9(1-3/8) 38.1(1-1/2)
44
46
48
50
52
54
56
58
60
62
22.2(7/8)
44.5(1-3/4) 41.3(1-5/8)
25.4(1) 53.98(2-1/8)
44.5(1-3/4)
64
66
53.98(2-1/8) 44.5(1-3/4) 53.98(2-1/8)
68
70
72
74
76
78
80