LG ARWN Serie Manual De Instalación página 32

Refrigerant piping system
3. When installing 3 outside units
Ex) 6 Indoor Units connected
Ⓐ : Outside Units
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe between
Outside units:ARCNN30
Ⓕ : Connection branch pipe between
Outside units:ARCNN20
Ú Slave2 outside unit ~ Connecting
branch pipe Ⓕ: Pipe diameter
between outside units (F)
Liquid pipe Gas pipe
[mm(inch)] [mm(inch)]
Ø9.52(3/8)/12.7(1/2) Ø22.2(7/8)/28.58(1-1/8)
Ú Slave1 outside unit ~ Connecting
branch unit Ⓔ : Pipe diameter
between outside units (E)
Liquid pipe Gas pipe
[mm(inch)] [mm(inch)]
Ø15.88(5/8)/19.05(3/4) Ø34.9(1-3/8)/41.3(1-5/8)
Ú Total refrigerant pipe length = A + B + C + D + a + b + c + d + e ≤ 300m(984ft)
Longest pipe length (Equivalent pipe length)
L
A +f ≤ 150m(492ft)( 175m(574ft))
Longest pipe length after 1st branching
ℓ
f ≤ 40m(131ft)
High/Low difference (Outside unit ÷ Indoor unit)
H
H ≤ 50m(164ft)
High/Low difference (Indoor unit ÷ Indoor unit)
h
h ≤ 15m(49ft)
High/Low difference (Outside unit ÷ Outside unit)
h1
h1 ≤ 2m(6.6ft)
• For the pipe length after the header branch (a~f), it is recommended to install the unit so that the difference of the pipe distance connected to
the indoor unit is minimized.
• The large difference in pipe distance can cause performance difference between indoor units.
• After the header branch, you cannot use the Y branch and header branch.
• When the pipe distance corresponding to the farthest indoor unit from the outside unit is 90m or above, you must change the main pipe diame-
ter according to the outside unit capacity in accordance with the following table. (This applies to both the liquid and gas pipes.)
40,48,50,60HP ............................................Ø41.3(1-5/8)
32 Outside Unit
Low/high pressure
common pipe
Ø19.05(3/4)
Low/high pressure
common pipe
Ø19.05(3/4)
Gas Pipe
Slave2
Slave1
Master
Below 2m(6.6ft) Below 2m Below 2m
(h1) (h1) (h1)
10m or
less
Below 15m(49ft)
Branch pipe can not be used after header
Ú Connecting branch pipe Ⓔ ~ Header branch
part Ⓑ : Main pipe diameter (A)
Outside unit capacity Liquid pipe[mm(inch)] Gas pipe [mm(inch)]
40,48,50,60HP Ø19.05(3/4)
40,48,50,60HP ............................................Ø19.05(3/4) ' Ø22.2(7/8)
L150m(492ft)
l 40m(131ft)
Ø41.3(1-5/8)
Liquid Pipe