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[2-10 Restrictions on Refrigerant Pipes ]
2-10-2
Restrictions on Refrigerant Pipe Size
(1) Between outdoor unit and the first twinning pipe (Part A)
Outdoor units
72
96
144
192
(2) Between BC controller and indoor unit (Sections a, b, c, d, e, and f )
Indoor unit
P06, P08, P12, P15, P18
P24, P27, P30
P36, P48, P54
P72
P96
(3) Between the main and sub BC controllers (Section C)
Indoor unit
- P72
P73 - P108
P109 - P126
P127 - P144
P145 - P168
Select the proper size pipes for the main unit based on the total capacity of the indoor units that are connected to both sub
BC controllers. Select the proper size pipes for the sub controller side based on the total capacity of the indoor units that are
connected to the sub controller.
HWE13080
Refrigerant pipe size
Low-pressure pipe
High-pressure pipe
ø19.05 [3/4"]
ø15.88 [5/8"]
ø22.2 [7/8"]
ø19.05 [3/4"]
ø28.58 [1-1/8"]
ø22.2[7/8"]
Refrigerant pipe size
Liquid pipe
ø6.35 [1/4"]
ø9.52 [3/8"]
ø12.7 [1/2"]
Refrigerant pipe size (Brazed connection on all models )
Liquid pipe
ø9.52 [3/8"]
ø12.7 [1/2"]
ø15.88 [5/8"]
- 57 -
Connection to outdoor unit and BC controller
Low-pressure pipe
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
Indoor unit connection
(Flare connection for all models)
Gas pipe
Liquid pipe
ø12.7 [1/2"]
ø6.35 [1/4"]
ø15.88 [5/8"]
ø9.52 [3/8"]
ø19.05 [3/4"]
ø12.7 [1/2"]
ø22.2
[7/8"]
High-pressure gas pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Unit : mm [inch]
High-pressure pipe
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2 [7/8"]
Unit : mm [inch]
Gas pipe
ø12.7 [1/2"]
ø15.88 [5/8"]
ø19.05 [3/4"]
ø22.2
[7/8"]
Unit : mm [inch]
Low-pressure gas pipe
ø19.05 [3/4"]
ø22.2 [7/8"]
ø28.58 [1-1/8"]
GB
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