Refrigerant Piping System; Pipe Connection Method Between Outdoor Unit/Indoor Unit - LG ARUN080LTE4 Installation Manual

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Refrigerant piping system

1 Outdoor Units
Y branch method
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Combination of Y
branch/header Method
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
Header Method
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ⓔ : Header
Series Outdoor Units (2 Units ~ 4 Units)
Y branch method
Ⓐ : Outdoor Unit
10m or
Ⓑ : 1st branch (Y branch) less
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch
pipe between Outdoor
units: ARCNN41
Ⓕ : Connection branch
pipe between Outdoor
units : ARCNN31
Ⓖ : Connection branch
pipe between Outdoor
units : ARCNN21
Combination of Y branch/
header Method
Ⓐ : Outdoor Unit 10m or
less
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe
between Outdoor
units : ARCNN41
Ⓕ : Connection branch pipe
between Outdoor
units : ARCNN31
Ⓖ : Connection branch pipe
between Outdoor
units : ARCNN21
Ⓗ : Header
Ⓘ : Sealing
Indoor
Unit
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
h 40m
h * : See Table 4
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
h * : See Table 4
L200m
l 40m
h 40m
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
Slave3
Slave2
Slave3
Slave1
Slave2
Master
Slave1
Master
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
h 40m
h * : See Table 4
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
Slave3
Slave3
Slave2
Slave2
Slave1
Slave1
Master
Master
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
h * : See Table 4
Header Method
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe
between Outdoor
units : ARCNN41
Ⓕ : Connection branch pipe
between Outdoor
units : ARCNN31
Ⓖ : Connection branch pipe
between Outdoor
units : ARCNN21
Pipe Connection Method between outdoor
unit/indoor unit
Master
L2
L3
Indoor
Unit
1st branch
l 40m
h 40m
h See Table 2
A : Refrigerant pipe diameter from outdoor unit to first branch
E : Refrigerant pipe diameter for outdoor unit capacity
(Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outdoor unit capacity
(Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outdoor unit capacity(Slave 3)
Level Difference
(Outdoor unit ↔ Outdoor unit)
Max length from first branch to
each outdoor unit (L1, L2, L3)
Indoor
Unit
(Table 1) Limit Pipe length
Longest
length(L)
Outdoor Unit
Max pipe
↔
length
Equivalent
Indoor Unit pipe length
Total pipe
Outdoor Unit
Difference in
Max
↔ Indoor Unit
height(H)
difference
in height
Indoor Unit Difference in
↔ Indoor Unit
Longest pipe
length after
length(l)
1st branch
h * : See Table 4
! WARNING
Increased Pipe Diameter(table 2)
- When pipe length is 90m or more from ODU to 1st branch
- When level difference is 50m or more
Slave3
Slave2
Slave1
Slave3
10m or
Slave2
Master
less
h 40m
Slave1
Slave2
H1
L1
Refrigerant pipe diameter from outdoor unit to first branch
5m
Less than 10m
(equivalent length of piping 13m)
Combination of Y
Y branch
branch/header
Method
Method
A+B+b≤150 m
A+B+C+D+e≤150 m
A+C+e≤150 m
pipe (200 m: Conditional
(200 m: Conditional
application)*
application)*
175 m 175 m
(225 m: Conditional (225 m: Conditional
application)* application)*
1,000 m 1,000 m
length
110 m 110 m
40 m 40 m
height(h)
40 m 40 m
Pipe
(90 m: Conditional (90 m: Conditional ap-
application)* plication)*
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
Slave1
Master
L200m
l 40m
Slave3
Header
Method
A+f≤200 m
225 m
1,000 m
110 m
40 m
40 m