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REFRIGERANT PIPING CONNECTIONS
Refrigerant Piping System Limitations/Installation
Connection Limitations
Single zone systems consist of one outdoor unit and one indoor unit. One of the most
critical elements of a single zone system is the refrigerant piping. Table 14 lists pipe
length limits that must be followed in the design of a Single Zone Wall Mount refriger-
ant pipe system. Refer to Figure 27 for maximum length and elevation of piping.
Table 14: Single Zone High Efficiency Refrigerant Piping System Limitations
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
Additional Refrigerant Needed (oz/ft)
Installation
Duct Free Single Zone Wall Mounts are a one-to-one system. There is a direct piping connection between the outdoor unit and the indoor
unit. Figure 28 Illustrates the basic pipe connections between the outdoor and indoor unit. Refer back to this illustration as you proceed with
pipe connections. This illustration shows the indoor unit being installed at a higher position than the outdoor unit, however, should you install
the outdoor unit at a higher position than the indoor unit, the basic pipe connections should be the same.
Refer back to the table within the "Connection Limitations" section (above) for specific length limitations in conjunction with outdoor unit
and indoor unit positioning.
• As you proceed with the piping connections be sure to adhere to pipe support
spacing lengths as shown in Figure 29 below. Refer back to "Pipe Supports" sec-
tion for in-depth information regarding using elbows, clamps and pipe supporting
materials.
• Always adhere to state and local codes regarding piping and accurate support
spacing along the outdoor pipe line.
Figure 29: Pipe Support Lengths - Outdoors
Pipe
Clamps
A + B ≈ 12"–19"
26
Longest total equivalent piping length
Shortest total equivalent piping length
Distance between fittings and indoor units or outdoor units
If outdoor unit is above indoor unit
If outdoor unit is below indoor unit
A
B
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.
Figure 27: Single Zone System Layout
Max Length = A
Indoor unit
Max Elevation = B
A
B
Outdoor unit
LS090HSV4 LS120HSV4 LS180HSV4
65.6
6.6
≥20 inches
≥20 inches
32.8
32.8
0.22
Figure 28: Installation and Piping Connection Overview
Installation Overview
Saddle
Air Inlet
Air Outlet
Base Plate
Additional accessories/parts/tools that will be
needed for installation but are not provided by LG.
Unit = Feet
Outdoor unit
A
B
Indoor unit
65.6
98.4
6.6
9.8
≥20 inches
32.8
49.2
32.8
49.2
0.22
0.38
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealant)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
Vinyl tape (Wide)
• Apply after carrying out a
drainage test.
Gas side piping
Liquid side piping
Additional drain pipe
Vinyl tape (Narrow)
Drain Hose
Connecting cable
Tubing Cover
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