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31
ENGLISH
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.
❋
However, if the size of the pipe between branch joints (B) is bigger than the size of the pipe connected to the outdoor
unit (A), apply the pipe size (A).
Indoor unit capacity
Branch pipe length within 45m(147.6ft)
note1)
Branch pipe length between 45~90m(147.6~295.3ft)
note1)
Liquid
Low pressure gas
High pressure gas
Liquid
Low pressure gas
High pressure gas
MBH
kW
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
~51
~15.0
9.52
3/8
15.88
5/8
15.88
5/8
12.70
1/2
15.88
5/8
15.88
5/8
51~76
15.0~22.4
9.52
3/8
19.05
3/4
15.88
5/8
12.70
1/2
19.05
3/4
15.88
5/8
76~96
22.4~28.1
9.52
3/8
22.22
7/8
19.05
3/4
12.70
1/2
22.22
7/8
19.05
3/4
96~115
28.1~33.6
12.7
1/2
28.58
1 1/8
19.05
3/4
15.88
5/8
28.58
1 1/8
19.05
3/4
115~154
33.6~45.0
12.7
1/2
28.58
1 1/8
22.22
7/8
15.88
5/8
28.58
1 1/8
22.22
7/8
154~172
45.0~50.4
15.88
5/8
28.58
1 1/8
22.22
7/8
19.05
3/4
28.58
1 1/8
22.22
7/8
172~240
50.4~70.3
15.88
5/8
28.58
1 1/8
28.58
1 1/8
19.05
3/4
28.58
1 1/8
28.58
1 1/8
240~336
70.3~98.4
19.05
3/4
34.92
1 3/8
28.58
1 1/8
22.22
7/8
34.92
1 3/8
28.58
1 1/8
336~360 98.4~105.5
19.05
3/4
41.28
1 5/8
28.58
1 1/8
22.22
7/8
41.28
1 5/8
28.58
1 1/8
360~461 105.5~135.2
19.05
3/4
41.28
1 5/8
34.92
1 3/8
22.22
7/8
41.28
1 5/8
34.92
1 3/8
461~577 135.2~169.0
19.05
3/4
41.28
1 5/8
34.92
1 3/8
22.22
7/8
41.28
1 5/8
34.92
1 3/8
577~
169.0~
22.22
7/8
53.98
2 1/8
41.28
1 5/8
25.40
1
note2)
53.98
2 1/8
41.28
1 5/8
Note1)
Note on measuring distance between branch joints (B)
: You must measure the distance between first branch joint
to the last indoor unit. (NOT from first joint to the last branch joint)
Note2) If 1" (25.4mm) pipe is not available on site, use 1 1/8" (28.58mm) pipe.
Note3) If 1 1/4" (31.75mm) pipe is not available on site, use 1 3/8" (34.92mm) pipe.
Note4) If 1 1/2" (38.1mm) pipe is not available on site, use 1 5/8" (41.28mm) 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(O.D)
Liquid
Gas
MBH
KW
mm
inch
mm
inch
~20
~6.0
6.35
1/4
12.7
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
78~96
23.0~29.0
9.52
3/8
22.22
7/8
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