LG ARUV140LTS4 Installation Manual page 35

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 ~ 60 Ø 19.05(3/4)
62 ~ 64 Ø 22.2(7/8)
66 ~ 82 Ø 22.2(7/8)
* If the step up size is not available, you can not select the next higher size available.
Header Method
1 Outdoor Unit
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
2 Outdoor Units
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe between Outdoor
units: ARCNN21
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
When pipe length is 90m 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 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 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)
Ø 44.5(1-3/4) Ø 25.4(1)
Ø 53.98(2-1/8) Ø 25.4(1)
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)
Ø 31.8(1-1/4) Ø 15.88(5/8) not increased
Ø 31.8(1-1/4) Ø 19.05(3/4) not increased
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)
L 200m
40m
Slave
Slave
Master
Master
10m or
less
h1
L 200m
40m
35
or more
Gas pipe
[mm(inch)]
not increased
not increased
not increased
not increased
not increased
not increased
40m
Slave
Master
ODU Capacity
Master ≥ Slave
40m