LG MULTI V IV PRO ARUN220LLN4 Installation Manual page 16

16
! CAUTION
• Bending radius should be
at least twice the
diameter of the pipe.
• Bend pipe after 500 mm or
more from
branch (or header).
Do not bend U type.
It may cause Performance
unsatisfactory or noise.
• If want U type, bending R
is more than 200 mm.
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 connec-
tions between outdoor units.
Pipe connection between outdoor
units (General Case)
Pipes between outdoor units
are 2 m or less
Pipes between outdoor units
are 2m or longer
- If the distance between the outdoor units becomes more than 2 m,
apply Oil Traps between the gas pipes.
- If the outdoor unit is located lower than the main pipe, apply Oil Trap.
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.
500mm or more 500mm or more
The maximum pipe
The maximum pipe
length after the first
length after the first
branching between the
branching between the
outdoor units is 10m or
outdoor units is 10m or
less
less
2 m or less
2 m or less
Oil Trap
0.2m or more
2m or less
2m or longer
Oil Trap Oil Trap
2m or less 2m or less
2m or longer 2m or longer
Oil Trap
- The pipes between the outdoor units must maintain horizontal level-
ness or give an inclination to prevent a back flow toward the slave
outdoor unit. Otherwise, the unit may not operate properly.
(Example 1)
Toward indoor unit
(Example 2)
Toward indoor unit
Toward indoor unit
Pipe inclination (2 or more)
(Example 3)
Toward indoor unit
- Apply Oil Trap as shown below when the length of the pipe between
the outdoor units is more than 2 m. Otherwise, the unit may not op-
Toward indoor unit
erate properly.
(Example 1)
Toward indoor unit
Toward indoor unit
Toward indoor unit
(Example 2)
Toward indoor unit
Pipe inclination (2 or more)
Toward indoor unit
2 m
Toward indoor unit
Toward indoor unit
- When connecting the pipes between the outdoor units, the accumu-
Toward indoor unit
Pipe inclination (2° or more)
lation of oil in the slave outdoor unit should be avoided. Otherwise,
the unit may not operate properly.
(Example 1)
Toward indoor unit
Toward indoor unit
(Example 2)
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
Pipe inclination (2° or more)
Toward indoor unit
h
Toward indoor unit
Oil Trap
Toward indoor unit
h
Toward indoor unit
Toward indoor unit
Toward indoor unit
2 m
Toward indoor unit
Toward indoor unit
Oil Trap
2 m
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
h
Toward indoor unit