ENGLISH-28
Refrigerant pipe installation
Size of the pipe between branch joints (B)
Select the pipe size according to the sum of indoor unit capacity which will be connected after the branch.
Indoor unit capacity
Branch pipe length within 45 m (147.6 ft)
Branch pipe length between 45~90 m
(147.6 ~ 295.3 ft)
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
MBH
kW
mm
inch
mm
inch
mm
inch
mm
inch
~ 51
~ 15.0
9.52
3/8
15.88
5/8
12.70
1/2
19.05
3/4
51 ~ 76
15.0 ~ 22.4
9.52
3/8
19.05
3/4
12.70
1/2
22.22
7/8
76 ~ 96
22.4 ~ 28.1
9.52
3/8
22.22
7/8
12.70
1/2
25.40
note1)
1
note1)
96 ~ 136
28.1~ 40.0
12.70
1/2
28.58
1 1/8
15.88
5/8
28.58
1 1/8
136 ~ 154
40.0 ~ 45.0
12.70
1/2
28.58
1 1/8
15.88
5/8
31.75
note2)
1 1/4
note2)
154 ~ 240
45.0 ~ 70.3
15.88
5/8
28.58
1 1/8
19.05
3/4
31.75
note2)
1 1/4
note2)
240 ~ 336
70.3 ~ 98.4
19.05
3/4
34.92
1 3/8
22.22
7/8
38.10
note3)
1 1/2
note3)
336 ~ 461
98.4 ~ 135.2
19.05
3/4
41.28
1 5/8
22.22
7/8
41.28
1 5/8
461 ~ 577
135.2 ~ 169.0
19.05
3/4
41.28
1 5/8
22.22
7/8
53.98
2 1/8
577 ~
169.0 ~
22.22
7/8
53.98
2 1/8
25.40
note1)
1
note1)
53.98
2 1/8
Note1) If 1” (25.40) pipe is not available on site, use 1 1/8” (28.58) pipe.
Note2) If 1 1/4” (31.75) pipe is not available on site, use 1 3/8” (34.92) pipe.
Note3) If 1 1/2” (38.10) pipe is not available on site, use 1 5/8” (41.28) pipe
Size of the pipe between the branch joint and the indoor unit
Make a selection according to outdoor unit capacity.
Indoor unit capacity
Pipe size (Outer Diameter)
Liquid pipe
Gas pipe
MBH
kW
mm
inch
mm
inch
~ 20
~ 6.0
6.35
1/4
12.70
1/2
24 ~ 52
7.1 ~ 16.0
9.52
3/8
15.88
5/8
68 ~ 78
20.0 ~ 23.0
9.52
3/8
19.05
3/4
78 ~
23.0 ~
9.52
3/8
22.22
7/8
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