LG MULTI F MAX

37
Refrigerant Piping Connections
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
F
MAX
MULTI
F
Table 24: Outdoor Unit Piping Connections.
Figure 43: Multi F Refrigerant Pipe Connections
(LMU36CHV shown as example).
Avoid Pipe Damage
• When routing field-provided piping, avoid damaging the outdoor unit from
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• Properly insulate the liquid and gas lines separately up to the point of
connection at the unit frame.
• See table below for Multi F outdoor unit connection types.
Main gas
valve
Main liquid
valve
Gas Piping Connections
Liquid
Piping
Connections
A-UNIT
B-UNIT
C-UNIT
D-UNIT
Connection sockets (included as a factory-supplied accessory with
the indoor units) may need to be used when piping the indoor units
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sockets are included with the Branch Distribution unit.
Indoor Unit Capacity
Vapor (in., OD)
Liquid (in.,
OD)
A B A B
18,000 Btu/h: Wall-
Mounted
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Ø5/8
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18,000 Btu/h: Low Static
Duct, Four-Way Cassette
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24,000 Btu/h ĺ N/A
A
B
Flare
to
Indoor
Unit
Flare
to
Outdoor
Unit
1. Align the center of the piping sections and tighten the flare nut by
hand.
2. Tighten the flare nut with a torque wrench, using the arrows on
the wrench as a guide, until a click is heard.
REFRIGERANT PIPING CONNECTIONS
Multi F Outdoor Unit to Indoor Unit Piping Connections
Outdoor Unit Piping Connections LMU18CHV LMU24CHV LMU30CHV LMU36CHV
Liquid Line Connection (in., OD) x Qty. 1/4 x 2 1/4 x 3 1/4 x 4 1/4 x 4
Vapor Line Connection (in., OD) x Qty. 3/8 x 2 3/8 x 3 3/8 x 4 3/8 x 4
Table 25: Indoor Unit Pipe Sizes.
Table 26: Connection Socket Dimensions.
Figure 44: Connection Socket Diagram.
Using the Connection Socket
Connection Socket
Figure 45: Performing Connections.
Indoor Unit Capacity
Vapor Line
Piping Size (in., OD)
Liquid Line
Piping Size (in., OD)
7,000 Btu/h
Ø3/8
Ø1/4
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
18,000 Btu/h
Ø1/2
24,000 Btu/h
Table 27: Indoor Unit Piping Connections.
Indoor Unit Capacity
Vapor Line
Conn. (in., OD)
Liquid Line
Conn. (in., OD)
7,000 Btu/h
Ø3/8 Ø1/4
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
18,000 Btu/h: Wall-Mounted Ø5/8 Ø3/8
18,000 Btu/h: Low Static Duct,
Four-Way Cassette
Ø1/2 Ø1/4
24,000 Btu/h Ø1/2 Ø1/4
Correctly route the piping so it does not make contact with mounting bolts.
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