LG multi V ARUN Series Installation Manual page 44

Pipe connections between indoor and outdoor unit
Distribution Method
1. Line Distribution
Slave
Master
1st
Slave
Master
1st
1st
Main pipe
Distribution
2. Vertical Distribution
Ensure that the branch pipes are attached vertically.
Slave
3. The others
Slave
Master
44 Outdoor Unit
2nd
2nd
3rd
2nd
Main pipe
Distribution
Master
Slave
3rd main pipe distribution
Master
2nd
1st
3rd
Slave
Master
Slave
Master
Header