LG MULTI V PLUS LRUV Series Installation Manual page 40

Refrigerant piping installation
3 Outdoor Units
Example : 5 Indoor Units connected
: Outdoor Unit
: 1st branch(Y branch)
: Y branch
: Indoor Unit
: Connection branch pipe
between Outdoor units:
ARBL302C
: Connection branch pipe
between Outdoor units:
ARBL202C
: Header
: Sealing
➲ Sub2 Outdoor unit ~ Connection branch pipe
High/Low Pressure Common pipe
(mm)
Ø19.05(3/4 inch)
➲ Connection branch pipe
High/Low Pressure Common pipe
(mm)
Ø19.05(3/4 inch)
➲ Connection branch pipe
Liquid pipe
(mm)
Ø22.2(7/8 inch)
➲ Refrigerant pipe diameter from branch to branch (B,C)
Downward Indoor Unit total capacity
[kW(Btu/h)]
~8.3(28,300)
~17.8(60,700)
~27.9(95,200)
~42.4(144,700)
~58.5(199,600)
~75.4(257,300)
75.5(257,600)~
40 Outdoor Unit
10m or
less
Liquid pipe
Ø12.7(1/2 inch)
~ Connection branch pipe
Liquid pipe
Ø19.05(3/4 inch)
~ Main pipe diameter (A)
Gas pipe
(mm)
3
Ø44.5(1 / inch)
4
Liquid pipe
(mm)
Ø9.52(3/8 inch)
Ø12.7(1/2 inch)
Ø12.7(1/2 inch)
Ø12.7(1/2 inch)
Ø15.88(5/8 inch)
Ø19.05(3/4 inch)
Ø22.2(7/8 inch)
Branch pipe can not be used after header
Pipe diameter (F)
Gas pipe
(mm) (mm)
Ø28.58(1
Gas pipe
(mm) (mm)
Ø38.1(1
Gas pipe
(mm)
Ø15.88(5/8 inch)
Ø19.05(3/4 inch)
Ø25.4(1 inch)
Ø28.58(1
Ø31.8(1
Ø38.1(1
Ø44.5(1
1
/ inch)
8
Pipe diameter (E)
1 / inch)
2
1
/ inch)
8
1 / inch)
4
1
/ inch)
2
3 / inch)
4