LG ARUM080LTE5 Engineering Product Data Book page 732

Multi V 5
7. Refrigerant piping system
■ Limits of pipe length and difference in height
Connection method
Longest pipe length (L)
: between Outdoor Unit and Indoor Unit
Max.pipe
Longest pipe equivalent length* (L)
length
: between Outdoor Unit and Indoor Unit
Longest pipe length after 1st branch (l)
Total pipe length
Difference in height (H)
: between Outdoor Unit and Indoor Unit
Max.difference
in height
Difference in height (h)
: between Indoor Unit and Indoor Unit
Note
• * : Assume equivalent piping length of Y branch to be 0.5m (1.64ft), that of header to be 1m (3.28ft), calculation
purpose.
• ** : To apply Conditional Application
WARNING
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 90m (295ft) or more
(Liquid or Gas pipes are increased in accordance with below table)
• The level difference (Outdoor unit ↔ Indoor unit) is 50m (164ft) or more (Only liquid pipe is increased)
■ Refrigerant pipe diameter from outdoor unit to first branch. (A)
Upward
Outdoor 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)
24 Ø 15.88(5/8)
26 ~ 34 Ø 19.05(3/4)
36 ~ 60 Ø 19.05(3/4)
62 ~ 64 Ø 22.2(7/8)
66 ~ 96 Ø 22.2(7/8)
Note
• * : If available on site, select pipe size from the pipe diameter table according to capacity.
Otherwise it doesn't need to be increased.
• Model line up could be different in accordance with target region.
Y branch only
A+B+C+D+e ≤ 150m [492ft]
(200m [656ft]**)
175m [574ft]
(225m [738ft]**)
40m [131ft]
(90m [295ft]**)
1,000m [3,281ft]
110m [361ft]
40m [131ft]
When equivalent pipe length is 90m(295ft)
or more from ODU to farthest IDU
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)
Ø 28.58(1-1/8) Ø 15.88(5/8)
Ø 28.58(1-1/8) Ø 19.05(3/4)
Ø 34.9(1-3/8) Ø 19.05(3/4)
Ø 34.9(1-3/8) Ø 22.2(7/8)
Ø 41.3(1-5/8) Ø 22.2(7/8)
Ø 41.3(1-5/8) Ø 25.4(1) *
Ø 53.98(2-1/8) Ø 25.4(1) *
Installation of Outdoor Units
Combination of Y
branch/header
A+B+b ≤ 150m [492ft] )
(200m [656ft]**)
A+C+e ≤ 150m [492ft]
(200m [656ft]**)
175m [574ft]
(225m [738ft]**)
40m [131ft]
(90m [295ft]**)
1,000m [3,281ft]
110m [361ft]
40m [131ft]
Increased Pipe Diameter
When level difference is 50m
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)
not increased 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)
not increased Ø 19.05(3/4)
Ø 38.1(1-1/2) * Ø 22.2(7/8)
not increased Ø 22.2(7/8)
Ø 53.98(2-1/8) Ø 25.4(1) *
not increased Ø 25.4(1) *
Header only
A+f ≤ 200m
[656ft]
225m [738ft]
40m [131ft]
1,000m [3,281ft]
110m [361ft]
40m [131ft]
or more
Gas pipe
[mm(inch)]
not increased
not increased
not increased
not increased
not increased
not increased
not increased
not increased
not increased
not increased
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