LG MULTI V Installation Manual page 40

Pipe connections between indoor and outdoor unit
u Pipe Connection Method/Precautions for Series connections between Outdoor units
- Separate Y branch joints are needed for series connections between outdoor units.
- Please refer to the below connection examples to install pipe connections between outdoor units.
n Pipe connection between outdoor units
(General Case)
n Pipes between outdoor units are
2m(6.6ft) or less
n Pipes between outdoor units are
2m(6.6ft) or longer
• If the distance between the outdoor units becomes more than 2m(6.6ft), apply Oil Traps between the gas pipes.
• If the outdoor unit is located lower than the main pipe, apply Oil Trap.
n Examples of Wrong Pipe Connections
If the main pipe is higher
than the outdoor units, oil
is accumulated in the
outdoor unit.
If there are differences in the height
between the outdoor units, oil is
accumulated in the lower outdoor unit.
40 Outdoor Unit
2m(6.6)ft or less
Oil Trap
0.2m(0.66ft) or more
2m(6.6ft) or less
2m(6.6ft) or longer
Oil Trap Oil Trap
2m(6.6ft) or less
2m(6.6ft) or less
2m(6.6ft) or longer 2m(6.6ft) or longer
The maximum pipe length
after the first branching
between the outdoor units is
10m(33ft) or less
Oil Trap