Restrictions On Refrigerant Pipe Size - Mitsubishi Electric PUHY-HP72 Service Handbook

[2-10 Restrictions on Refrigerant Pipes ]
2-10-2

Restrictions on 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
192 model
240 model
*1. Use ø12.7 [1/2"] pipes if the piping length to the farthest indoor unit exceeds 90 m [295 ft].
*2. Use ø12.7 [1/2"] pipes if the piping length to the farthest indoor unit 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]
05 - 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
HWE18240_GB
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"]
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"]
Gas pipe size (mm) [inch]
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"]
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