LG LMCN077HV Installation Manual page 35

F
MULTI
F
MULTI MAX
Multi F MAX Outdoor Unit System Piping Connections, continued.
Table 30: Ceiling Cassette Indoor Unit Pipe Sizes.
Indoor Unit Vapor Line
Capacity Piping Size (in., OD)
7,000 Btu/h
9,000 Btu/h
12,000 Btu/h
18,000 Btu/h
Connection sockets (included as a factory-supplied accessory with the indoor units) may need to be used when piping the indoor units to the
branch distribution unit.
Table 32: Connection Socket Dimensions.
Indoor Unit Capacity
18,000 Btu/h
Figure 46: Possible Outdoor Unit or Branch Distribution Unit (Multi F MAX only) to Indoor Unit Connections.
1. 3/8 in. to 3/8 in. Connection
Ø3/8 in.
Flare side to
branch distribution unit or ODU
3. 1/2 in. to 5/8 in.
Connection
Ø1/2 in.
Flare
side pipe
from branch distribution unit or ODU
Torque
wrench
Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Liquid (in.,
Vapor (in., OD)
OD)
A B A
Ø3/8 → Ø1/2 N/A
Flare side to indoor unit
Ø3/8 in.
Piping
Flare nut
Piping
Flare side to indoor unit
Flare nut
Ø5/8 in.
Connection socket
Spanner
Flare nut
Field Piping
Due to our policy of continuous product innovation, some specifications may change without notification.
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PIPING CONNECTIONS
Table 31: Ceiling Cassette Indoor Unit Piping Connections.
Indoor Unit Capacity
7,000 Btu/h
9,000 Btu/h
12,000 Btu/h
18,000 Btu/h
Figure 45: Connection Socket Diagram.
A
B
Connection Socket
2. 3/8 in. to 1/2 in.
Connection
Ø3/8 in.
Flare
side to
branch distribution unit or ODU
4. 1/4 in. to 3/8
Connection
Ø1/4 in.
Flare
side to
branch distribution unit or ODU
IDU to ODU
Vapor Line
Conn. (in., OD) Conn. (in., OD)
Ø3/8
Ø1/2
Piping
Flare side to indoor unit or
Flare nut
pipe to indoor unit
Ø1/2 in.
Connection socket
Piping
Flare side to indoor unit
Flare nut
Ø3/8 in.
Connection socket
Liquid Line
Ø1/4
Ø1/4
B
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