LG ARUB80LT2 Installation Manual page 32

Refrigerant piping installation
1) Keep the 40m distance from the first branch to the farthest indoor.
2) Keep the horizontal level between HR units.( for example, the same flour. )
Y branch
32 Outdoor Unit
Indoor
Unit
Keep the sum of indoor capacity is under 160kBtu/hr
1) under 40m
2) Same horizontal level
Indoor Indoor Indoor Indoor
Unit Unit Unit Unit
Keep the sum of indoor capacity is under 160kBtu/hr
1) under 40m
2) Same horizontal level
Indoor Indoor
Unit Unit
Indoor Indoor Indoor
Unit Unit Unit
It's not allowed
Height
Indoor
Unit
Indoor
Unit