LG multi V ARUN Series Installation Manual page 35

u Combination of Y branch/header method
1 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
2 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN21
Ⓕ : Header
Ⓖ : Sealed piping
Pipe connections between indoor and outdoor unit
Branch pipe can not be used after header
Slave
Master
10m or
less
Branch pipe can not be used after header
L 150m(200m : Conditional application)
40m(90m : Conditional application)
Slave Slave
Master Master
ODU Capacity
Master ≥ Slave
L 150m(200m : Conditional application)
40m(90m : Conditional application)
Installation Manual 35