Branch Distribution To Indoor Unit Piping Connections; Indoor Unit Piping Connections - LG MULTI F Series Installation Manual
Multi-zone heat pump systems with lgred 1.5 to 3.5 tons
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- Engineering manual (392 pages) ,
- Installation manual (104 pages) ,
- Owner's manual (234 pages)
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F
MULTI
WITH
F
MULTI
MAX
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appropri-
ate 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.
Vapor Line
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 con-
nection socket dimensions. See
the follow page for the connection
socket installation procedure.
INSTALLING MULTI F MAX WITH
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
Ø3/8 x 3
7,000, 9,000, 12,000, 15,000, 18,000, 24,000 (A, B, C)
Ø1/2 x 1
24,000, 36,000 (D)
Figure 51: Branch Distribution Ports to Indoor
Units -- Side View.
Liquid Line
Piping Size (in., OD)
Ø3/8
Ø1/4
Ø1/2
Ø5/8
Ø3/8
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
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
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
24,000 Btu/h
36,000 Btu/h
LGRED SYSTEMS
Figure 50: Branch Distribution Piping
Connections.
Multi F MAX with LGRED Outdoor Units
(36, 42 kBtu/h)
(Branch Distribution Unit: PMBD3640)
(Only for 18, 24 kBtu/h Indoor Units)
(Branch Distribution Unit: PMBD3641)
(Only for 36 kBtu/h Indoor Units
to Connect to "D ROOM")
Vapor Line
Conn. (in., OD)
Ø3/8
Ø5/8
Ø1/2
Ø1/2
Ø5/8
Vapor (in., OD)
A
B
Liquid Line
Conn. (in., OD)
Ø1/4
Ø3/8
Ø1/4
Ø1/4
Ø3/8
Liquid (in., OD)
A
B
N/A
N/A
49
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