LG Multi F Series Installation Manual page 51

F
MULTI
F
MULTI MAX
Multi F MAX Outdoor Unit System Piping Connections
Avoid Pipe Damage
• When routing field-provided piping,
• 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 26: Branch Distribution Unit Piping Connections.
Refrigerant Connections
Branch
Pipe Size (in.)
Distribution
Unit
Liquid
PMBD3620 Ø1/4 x 2
PMBD3630 Ø1/4 x 3
PMBD3640 Ø1/4 x 4
PMBD3641 Ø1/4 x 4
Table 27: Indoor Unit Pipe Sizes.
Indoor Unit
Capacity Piping Size (in., OD)
7,000 Btu/h
9,000 Btu/h
12,000 Btu/h
15,000 Btu/h
15,000 Btu/h: Console;
18,000 Btu/h
24,000 Btu/h
36,000 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
branch distribution unit. The connection sockets for 36k indoor units are
factory supplied with the branch distribution units. See tables above
and below for indoor unit piping connection and connection socket
dimensions. See the follow page for the connection socket installation
procedure.
INSTALLING MULTI F MAX SYSTEMS
avoid damaging the outdoor unit from excessive vibration.
Connectible Indoor Unit Capacity
Vapor
Ø3/8 x 2 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
Ø3/8 x 3 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
Ø3/8 x 4 7,000, 9,000, 12,000, 15,000, 18,000, 24,000
7,000, 9,000, 12,000, 15,000, 18,000, 24,000
Ø3/8 x 3
Ø1/2 x 1 24,000, 36,000 (D)
Vapor Line Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Ø5/8 Ø3/8
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.
Table 25: Outdoor Unit Piping Connections.
Outdoor Unit Piping Connections
Liquid Line Connection
(in., OD) x Qty.
Vapor Line Connection
(in., OD) x Qty.
(Btu/h)
(A, B, C)
Table 28: 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
15,000 Btu/h: Console;
18,000 Btu/h: Low Static Duct,
Four-Way Cassette
24,000 Btu/h
36,000 Btu/h
Table 29: Connection Socket Dimensions.
Indoor Unit Capacity
18,000 Btu/h: Wall-
Mounted
15,000 Btu/h: Console;
18,000 Btu/h: Low Static
Duct, Four-Way Cassette
24,000 Btu/h
36,000 Btu/h
LMU480HV, LMU540HV,
LMU600HV
3/8 x 1
3/4 x 1
Figure 50: Branch Distribution Ports to Indoor
Units -- Side View.
A B C
Vapor Line
Conn. (in., OD)
Ø3/8
Ø5/8
Ø1/2
Ø1/2
Ø5/8
Vapor (in., OD)
A B
Ø5/8
D
Liquid Line
Conn. (in., OD)
Ø1/4
Ø3/8
Ø1/4
Ø1/4
Ø3/8
Liquid (in., OD)
A B
N/A
N/A
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