LG MULTI F LMU183HV Installation Manual page 51

F
MULTI
F
MULTI MAX
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appro-
priate 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 facto-
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 following page for the
connection socket installation procedure.
INSTALLING MULTI F MAX SYSTEMS
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)
Figure 53: Branch Distribution Ports to Indoor
Units -- Side View.
A B
Vapor Line Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Ø5/8 Ø3/8
Table 29: Connection Socket Dimensions.
18,000 Btu/h: Wall-Mounted
18,000 Btu/h: Low Static Duct, Four-Way
*No socket adapter is required if connected to Port D on the PMBD3641.
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.
(Btu/h)
(A, B, C)
C D
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, VAHU
24,000 Btu/h
36,000 Btu/h
Indoor Unit Capacity
15,000 Btu/h: Console;
Cassette, VAHU
24,000 Btu/h*
36,000 Btu/h
Figure 52: Branch Distribution Piping
Connections.
Multi F MAX Outdoor Units
(48, 54, 60 kBtu/h)
(Branch Distribution Unit: PMBD3640)
(For 7~24 kBtu/h Indoor Units)
(Branch Distribution Unit: PMBD3641)
(Ports A~C only for 7~24 kBtu/h
Indoor Units;
Port D only for 24 or 36 kBtu/h
Indoor Units)
Vapor Line Liquid Line
Conn. (in., OD) Conn. (in., OD)
Ø3/8
Ø5/8
Ø1/2
Ø1/2
Ø5/8
Vapor (in., OD) Liquid (in., OD)
A B
Ø1/4
Ø3/8
Ø1/4
Ø1/4
Ø3/8
A B
N/A
N/A
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