Selection Of Refrigerant Piping - LG ARUV025GSD0 Engineering Product Data Book

7. Refrigerant Piping System
7.1 Pipe Connection Method between outdoor unit / indoor unit

7.1.1 Selection of Refrigerant Piping

Gas pipe
Main pipe
No. Piping parts
Outdoor unit
①
1st branching section
Branching section
②
Branching section
Branching section
③
Indoor unit
12 _
R410A(50/60Hz)
Outdoor unit
Liquid pipe
Branching
pipe
Branching
pipe
Name
↓
Main pipe
↓
Branching pipe
Indoor unit
↓
connecting pipe
Indoor unit
Selection of pipe size
Size of main pipe
Liquid pipe
Outdoor unit capacity[HP]
[mm(inch)]
2.5 Ø9.52(3/8)
3 Ø9.52(3/8)
4 Ø9.52(3/8)
Pipe size of between branching sections
Indoor unit Liquid pipe
capacity[kW(Btu/h)] [mm(inch)]
≤ 5.6(19,100)
Ø6.35(1/4)
< 16.0(54,600) Ø9.52(3/8)
< 22.4(76,400) Ø9.52(3/8)
< 36.4(124,200) Ø9.52(3/8)
Connecting pipe size of indoor unit
Indoor unit Liquid pipe
capacity[kW(Btu/h)] [mm(inch)]
≤ 5.6(19,100)
Ø6.35(1/4)
< 16.0(54,600) Ø9.52(3/8)
≤ 22.4(76,400)
Ø9.52(3/8)
≤ 28.0(95,900)
Ø9.52(3/8)
Gas pipe
[mm(inch)]
Ø15.88(5/8)
Ø15.88(5/8)
Ø15.88(5/8)
Gas pipe
[mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Gas pipe
[mm(inch)]
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)