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INSTALLATION
NOTE
Avoid Pipe Damage
• When routing field-provided piping,
sive vibration.
• Properly insulate the liquid and gas lines separately up to the point of connection at the
unit frame.
• See table below for Multi F / Multi F with LGRED outdoor unit connection types.
Correctly route the piping so it does not make contact with mounting bolts. Allow room
Table 11: Single Fan Multi F / Multi F with LGRED Outdoor Unit Piping Connections.
Outdoor Unit Piping Connections
Liquid Line Connection (in., OD) x Qty.
Vapor Line Connection (in., OD) x Qty.
Table 8: Indoor Unit Pipe Sizes.
Vapor Line
Indoor Unit Capacity
Piping Size (in., OD)
7,000 Btu/h
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
18,000 Btu/h
24,000 Btu/h
Connection sockets (included as a factory-supplied accessory with the indoor units) will need to be used when piping the indoor units to the outdoor
unit. See tables above and below for indoor unit piping connection and connection socket dimensions. See the follow page for the connection socket
installation procedure.
Table 9: Connection Socket Dimensions.
Indoor Unit Capacity
18,000 Btu/h Wall-Mounted and Vertical Air Handling Units
18,000 Btu/h Low Static Duct and Four-Way Cassette Units
24,000 Btu/h
30
avoid damaging the outdoor unit from exces-
18,000 Btu/h 24,000 Btu/h 30,000 Btu/h 36,000 Btu/h
Ø1/4 x 2
Ø1/4 x 3
Ø3/8 x 2
Ø3/8 x 3
Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 36: Single Fan Multi F Outdoor Unit Refrig-
erant Pipe Connections.
Liquid Piping
Service
Port
Ø1/4 x 4
Ø1/4 x 4
Ø3/8 x 4
Ø3/8 x 4
Table 10: Indoor Unit Piping Connections.
Indoor Unit Capacity
7,000 Btu/h
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
18,000 Btu/h Wall-Mounted and
Vertical Air Handling Units
18,000 Btu/h Low Static Duct
and Four-Way Cassette Units
24,000 Btu/h
Vapor (in., OD)
Liquid (in., OD)
A
B
F
MULTI
F
MULTI
Single Fan Multi F Outdoor Unit
(18~36kBtu/h)
Vapor Piping
Service Port
Liquid
Piping
Vapor Line
Conn. (in., OD)
Conn. (in., OD)
Ø3/8
Ø5/8
Ø1/2
Ø1/2
A
B
N/A
N/A
MAX
Vapor Piping
ROOM A
ROOM B
ROOM C
Liquid Line
Ø1/4
Ø3/8
Ø1/4
Ø1/4
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