Mitsubishi Electronics PUHY-P72 User Manual

Page of 326
[
II  Restrictions ] 
- 43 -
HWE08040
GB
1. Refrigerant 
pipe 
size
(1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size)
(2)  Size of the refrigerant pipe between the first branch and the indoor unit (indoor unit pipe size)
(3)  Size of the refrigerant pipe between the branches for connection to indoor units 
Outdoor unit set name 
(total capacity)
Liquid pipe size (mm) [inch]
Gas pipe size (mm) [inch]
72 model
ø9.52 [3/8"]
ø19.05 [3/4"]
96 model
ø9.52 [3/8"]
*1
*1. Use ø12.7 [1/2"] pipes if the piping length exceeds 90 m [295 ft]. 
ø22.2 [7/8"]
120 model
ø9.52 [3/8"]
*2
*2. Use ø12.7 [1/2"] pipes if the piping length exceeds 40 m [131 ft]. 
ø22.2 [7/8"]
144 model
ø12.7 [1/2"]
ø28.58 [1-1/8"]
168 model
ø15.88 [5/8"]
ø28.58 [1-1/8"]
192 model
ø15.88 [5/8"]
ø28.58 [1-1/8"]
216 model
ø15.88 [5/8"]
ø28.58 [1-1/8"]
240 model
ø15.88 [5/8"]
ø28.58 [1-1/8"]
264 - 312 model
ø19.05 [3/4"]
ø34.93 [1-3/8"]
336 - 360 model
ø19.05 [3/4"]
ø41.28 [1-5/8"]
model
Pipe diameter (mm) [inch]
06 - 15 models
Liquid pipe
ø6.35 [1/4"]
Gas pipe
ø12.7 [1/2"]
18 - 54 models
Liquid pipe
ø9.52 [3/8"]
Gas pipe
ø15.88 [5/8"]
72 model
Liquid pipe
ø9.52 [3/8"]
Gas pipe
ø19.05 [3/4"]
96 model
Liquid pipe
ø9.52 [3/8"]
Gas pipe
ø22.2 [7/8"]
Total capacity of the 
downstream units
Liquid pipe size (mm) [inch]
Gas pipe size (mm) [inch]
 - 54
ø9.52 [3/8"]
ø15.88 [5/8"]
P55 - P72
ø9.52 [3/8"]
ø19.05 [3/4"]
P72 - P108
ø9.52 [3/8"]
ø22.2 [7/8"]
P109 - P144
ø12.7 [1/2"]
ø28.58 [1-1/8"]
P145 - P240
ø15.88 [5/8"]
ø28.58 [1-1/8"]
P241 - P308
ø19.05 [3/4"]
ø34.93 [1-3/8"]
P309 - 
ø19.05 [3/4"]
ø41.28  [1-5/8"]