LG Tri-Zone Multi F Installation Manual page 38

REFRIGERANT PIPING CONNECTIONS
Multi F MAX Outdoor Unit System Piping Connections
Avoid Pipe Damage
•
• Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame.
• See table below for Multi F MAX outdoor unit connection types.
Correctly route the piping so it does not make contact with mount-
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connec-
tion wiring) to the appropriate branch distribution ports.
• Clearly note on the indoor unit's refrigerant piping (liquid, vapor)
which branch distribution port it is connected to (A, B, C, D).
Table 29: Branch Distribution Unit Piping Connections.
Branch Distribution Unit PMBD3620 PMBD3630 PMBD3640
Piping Connections to Outdoor Unit
Liquid (in., OD) x Qty.
Vapor (in., OD) x Qty.
Piping Connections to Indoor Units
Liquid (in., OD) x Qty. Ø1/4 x 2
Vapor (in., OD) x Qty. Ø3/8 x 2
Table 30: 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
15,000 Btu/h
18,000 Btu/h
24,000 Btu/h
36,000 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
Table 32: Connection Socket Dimensions.
Indoor Unit Capacity
18,000 Btu/h: Wall-
Mounted
18,000 Btu/h: Low Static
Duct, Four-Way Cassette
24,000 Btu/h
36,000 Btu/h
38
Ø3/8 x 1
Ø3/4 x 1
Ø1/4 x 3 Ø1/4 x 4
Ø3/8 x 3 Ø3/8 x 4
Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Ø5/8 Ø3/8
Vapor (in., OD) Liquid (in., OD)
A B A
Ø5/8
N/A
N/A
Due to our policy of continuous product innovation, some specifications may change without notification.
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Table 28: Outdoor Unit Piping Connections.
Outdoor Unit Piping Connections
Liquid Line Connection
(in., OD) x Qty.
Vapor Line Connection
(in., OD) x Qty.
Figure 46: Branch Distribution Ports to Indoor Units.
PMBD3641
Ø1/4 x 4
Ø3/8 x 3, Ø1/2 x 1
Table 31: 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
18,000 Btu/h: Low Static Duct,
Four-Way Cassette
24,000 Btu/h
36,000 Btu/h
Figure 47: Connection Socket Diagram.
A
B
MULTI
MULTI
LMU480HV, LMU540HV,
LMU600HV
3/8 x 1
3/4 x 1
A B C D
Vapor Line
Conn. (in., OD)
Ø3/8
Ø5/8
Ø1/2
Ø1/2
Ø5/8
Connection Socket
F
F
MAX
Liquid Line
Conn. (in., OD)
Ø1/4
Ø3/8
Ø1/4
Ø1/4
Ø3/8
B