LG MULTI V IV ARUN072BTE4 Installation Manual page 104

reFrIGeraNt PIPING DeSIGN
Pipe Sizing for Heat Pump Units
triple-Frame Heat Pump outdoor Unit connections
Figure 25: Heat Pump Triple-Frame Connections.
Slave2
A1
A2
A1, A2, and A3 diameters match the outdoor unit connection diameters. Main pipe D diameters are sized by LATS. See
the table below for B, C1, and C2 diameters.
Table 33: Heat Pump Triple-Frame Connection Pipe Sizes.
Size (tons) Model
ARUN312BTE4
26
ARUN312DTE4
ARUN336BTE4
28
ARUN336DTE4
ARUN360BTE4
30
ARUN360DTE4
Note:
• Larger-capacity outdoor units must be the master in a multi-frame system.
• Single-compressor outdoor units (72,000 Btu/h capacity) cannot be the master outdoor units in a multi-frame system.
• Master outdoor unit capacity must be greater than or equal to the slave1 outdoor unit capacity, and, where applicable, slave1 outdoor
unit capacity must be greater than or equal to the slave2 outdoor unit capacity.
• Insulate all refrigerant system piping and piping connections as detailed on pages 131-132.
• Common pipe no longer required between frames.
106
Slave1
ARCNN21
B
(Multi-frame Outdoor Unit
Y-branch Connector)
Master
ARUN144BTE4
ARUN144DTE4
ARUN144BTE4
ARUN144DTE4
ARUN144BTE4
ARUN144DTE4
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.
Master
A3
ARCNN31
(Multi-frame Outdoor Unit
Y-branch Connector)
Slave1 Slave2
ARUN096BTE4 ARUN072BTE4
ARUN096DTE4 ARUN072DTE4
ARUN096DTE4 ARUN096BTE4
ARUN096DTE4 ARUN096DTE4
ARUN121BTE4 ARUN096BTE4
ARUN121DTE4 ARUN096DTE4
ARCNN21 and ARCNN31
Outdoor Unit Connector
Pipe Accessories
D (main pipe
sized by LATS)
To Indoor Units
B
Liquid
5/8"
5/8"
5/8"
Vapor
1-1/8"
1-1/8"
1-1/8"