LG Multi V PRHR042A Installation Manual page 25

Outdoor unit Y-branches can only be installed in a horizontal or vertical
UP configuration.
The vertical DOWN configuration is not permitted.
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures
described is different from the size of the joint, the connecting
section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
Insulator
(included with kit)
Header
A
B
C
• When the number of indoor units to be connected to the branch
pipes is less than the number of branch pipes available for
connection then cap pipes should be fitted to the surplus branches.
B
• Fit branch pipe lie in a horizontal plane.
Horizontal plane
View from point B in the direction of the arrow
Tape
(field supply)
Liquid and gas
Insulator for
pipe joints
field piping
Ⓐ To Outdoor Unit
Ⓑ To Indoor Unit
• The indoor unit having larger
capacity must be installed closer
to Ⓐ than smaller one.
• If the diameter of the refrigerant
piping selected by the
procedures described is
different from the size of the
joint, the connecting section
should be cut with a pipe cutter.
ⓒ Pipe cutter
• When the number of pipes to be
connected is smaller than the
number of header branches,
install a cap to the unconnected
branches.
Pinched pipe
• Header should be insulated with the insulator in each kit.
• Joints between branch and pipe should be sealed with the tape
included in each kit.
Tape
Insulator
Insulator of field pipe
• Any cap pipe should be insulated using the insulator provided with
each kit and then taped as described above.
Insulator for cap pipe
Cap pipe
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
Tape
25