LG Multi V ARUN100LTH4 Installation Manual page 34

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
34
Total pipe length = A+B+C+a+b+c+d+e ≤ 1,000 m
Longest pipe length
L
A+B+b ≤ 150 m(200 m**)
Longest pipe length after 1st branch
B+b ≤ 40 m(90 m**)
Difference in height (Outdoor Unit ↔ Indoor Unit)
H
H ≤ 110 m
Difference in height (Indoor Unit ↔ Indoor Unit)
h
h ≤ 40 m
Difference in height (Outdoor Unit ↔ Outdoor Unit)
h1
h1 ≤ 5 m
• * : Assume equivalent pipe length of Y branch to be 0.5 m, that of header to be 1 m, cal-
culation purpose
• ** : To apply Conditional Application
• Indoor Unit should be installed at lower position than the header.
WARNING
!
• It is recommended that difference of piping length for pipes connected to the Indoor Unit
is minimized. Performance difference between Indoor Units may occur.
• When the any one (or both ) of below conditions are satisfied, the diameter of main pipe
(A) must be increased according to below table.
- The equivalent length between outdoor unit and the farthest indoor unit is 90 m or more
(Liquid and Gas pipes are increased)
- The level difference (Outdoor unit ↔ Indoor unit) is 50 m or more (Only liquid pipe is in-
creased)
Refrigerant pipe diameter from outdoor unit to first branch. (A)
Upward Out-
door unit Standard Pipe Diameter
total capacity
Liquid pipe
HP
[mm(inch)]
8 Ø 9.52(3/8)
10 Ø 9.52(3/8)
12 ~ 14 Ø 12.7(1/2)
16 Ø 12.7(1/2)
18 ~ 22 Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4)
24 Ø 15.88(5/8)
26 ~ 34 Ø 19.05(3/4)
36 ~ 48 Ø 19.05(3/4)
* If the step up size is not available, you can not select the next higher size available.
When pipe length is 90 m or
more from ODU to 1st branch
Gas pipe Liquid pipe
[mm(inch)] [mm(inch)]
Ø 19.05(3/4) Ø 12.7(1/2)
Ø 22.2(7/8) Ø 12.7(1/2)
Ø 28.58(1-1/8) Ø 15.88(5/8) not increased
Ø 28.58(1-1/8) Ø 15.88(5/8)
Ø 34.9(1-3/8) Ø 19.05(3/4) not increased
Ø 34.9(1-3/8) Ø 22.2(7/8)
Ø 41.3(1-5/8) Ø 22.2(7/8)
*Equivalent pipe length
A+B+b ≤ 175 m(225 m**)
Increased Pipe Diameter
When level difference is 50 m
Gas pipe Liquid pipe
[mm(inch)] [mm(inch)]
Ø 22.2(7/8) Ø 12.7(1/2)
Ø 25.4(1) Ø 12.7(1/2)
Ø 15.88(5/8)
Ø 31.8(1-1/4) Ø 15.88(5/8)
Ø 31.8(1-1/4) Ø 19.05(3/4)
Ø 19.05(3/4)
Ø 38.1(1-1/2) Ø 22.2(7/8)
not increased Ø 22.2(7/8)
or more
Gas pipe
[mm(inch)]
not increased
not increased
not increased
not increased
not increased
not increased
not increased
not increased