LG Multi V ARUN100LM3, Руководство по установке, Страница: 24 / 81

Pipe connections between indoor and outdoor unit
24 Outdoor Unit
Solo
-
24 Outdoor Unit
Solo
- Heat Pump
Ú
Refrigerant pipe length
Ú
Refrigerant pipe diameter from outdoor unit to first branch. (A)
• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose.
• : It is recommended that indoor unit is installed at lower position than the header.
• The difference between the indoor unit pipe length can occur the difference in performance.
Y branch Header Y branch/ Header
L Longest pipe length A+B+C+D+e ≤ 100 m A+f ≤ 100 m
A+B+b ≤ 100 m
A+B+e ≤ 100 m
ℓ
Longest pipe length after 1st branch 40 m 40 m 40 m
H
Difference in height (Outdoor unit
÷
Indoor unit)
50 m 50 m 50 m
h Difference in height (Indoor unit
÷
Indoor unit) 15 m 15 m 15 m
LTotal Total pipe length Equivalent pipe length 150 m 170 m 150 m 170 m 150 m 170 m
Outdoor unit Total capacity
[kW (Btu/h)]
Standard pipe Diameter
Liquid pipe[mm (inch)] Gas pipe[mm (inch)]
22.4 (76,400) Ø9.52 (3/8) Ø19.05 (3/4)
28.0 (95,900) Ø9.52 (3/8) Ø22.2 (7/8)
33.6 (172,000) Ø12.7 (1/2) Ø25.58 (1 1/8)
Ú
Refrigerant pipe diameter from branch to branch (B,C,D)
Downward Indoor Unit total capacity [kW(Btu/h)]
≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2)
< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)
≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)
< 33.6(114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4(172,000) Ø12.7(1/2) Ø28.58(1
1
/
8
)
Liquid pipe [mm(inch)] Gas pipe [mm(inch)]
u
Outdoor unit Connection
WARNING
• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the
same size with A.
Ex) In case indoor unit combination ratio 130% is connected to 28kW outdoor unit.
1) Outdoor unit main pipe diameter A : Ø22.2(Gas pipe), Ø9.52(Liquid pipe)
2) Pipe diameter B after first branch according to 130% indoor unit combination (36.4kW) ; Ø28.58(Gas pipe),
Ø12.7(Liquid pipe)
Therefore, pipe diameter B connected after first branch would be Ø22.2(Gas pipe)/ Ø9.52(Liquid pipe) which
is same with main pipe diameter
u
Indoor Unit Connection
Ú
Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
≤ 22.4(76,400)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]