[ II Restrictions ]
1. Refrigerant pipe size
(1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size)
Outdoor unit set name
(total capacity)
72 model
96 model
120 model
144 model
168 model
192 model
216 model
240 model
264 - 312 model
336 - 360 model
*1. Use ø12.7 [1/2"] pipes if the piping length exceeds 90 m [295 ft].
*2. Use ø12.7 [1/2"] pipes if the piping length exceeds 40 m [131 ft].
(2) Size of the refrigerant pipe between the first branch and the indoor unit (indoor unit pipe size)
model
Pipe diameter (mm) [inch]
06 - 15 models
Liquid pipe
Gas pipe
18 - 54 models
Liquid pipe
Gas pipe
72 model
Liquid pipe
Gas pipe
96 model
Liquid pipe
Gas pipe
(3) Size of the refrigerant pipe between the branches for connection to indoor units
Total capacity of the
downstream units
- 54
P55 - P72
P72 - P108
P109 - P144
P145 - P240
P241 - P308
P309 -
HWE0804A
Liquid pipe size (mm) [inch]
ø9.52 [3/8"]
*1
ø9.52 [3/8"]
*2
ø9.52 [3/8"]
ø12.7 [1/2"]
ø15.88 [5/8"]
ø15.88 [5/8"]
ø15.88 [5/8"]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø19.05 [3/4"]
ø6.35 [1/4"]
ø12.7 [1/2"]
ø9.52 [3/8"]
ø15.88 [5/8"]
ø9.52 [3/8"]
ø19.05 [3/4"]
ø9.52 [3/8"]
ø22.2 [7/8"]
Liquid pipe size (mm) [inch]
ø9.52 [3/8"]
ø9.52 [3/8"]
ø9.52 [3/8"]
ø12.7 [1/2"]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø19.05 [3/4"]
Gas pipe size (mm) [inch]
ø19.05 [3/4"]
ø22.2 [7/8"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
ø41.28 [1-5/8"]
Gas pipe size (mm) [inch]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
ø28.58 [1-1/8"]
ø34.93 [1-3/8"]
ø41.28 [1-5/8"]
- 43 -
GB