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42
Single Zone High Efciency, Standard, Extended Pipe and Mega Wall Mount Installation Manual
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.
REFRIGERANT PIPING CONNECTIONS
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 refriger-
ant piping. Table 21- Table 24 list pipe length limits that must be followed in the design of a Single Zone Wall Mount refrigerant pipe system.
Refer to Figure 37 for maximum length and elevation of piping.
Table 21: Single Zone High Efciency Refrigerant Piping System Limitations
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Longest total equivalent piping length
LS091HSV3 LS121HSV3 LS181HSV3 LS240HSV3
65.6 65.6 98.4 98.4
Distance between fittings and indoor units
or outdoor units
≥20 inches ≥20 inches ≥20 inches ≥20 inches
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
32.8 32.8 49.2 49.2
If outdoor unit is below indoor unit
32.8 32.8 49.2 49.2
Additional Refrigerant Needed (oz/ft)
0.22 0.22 0.38 0.38
Table 22: Single Zone Standard Refrigerant Piping System Limitations
Figure 37: Single Zone System Layout
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Max Length = A
Max Elevation = B
Unit = Feet
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Longest total equivalent piping length
LS307HV3 LS360HV3
98.4 98.4
Distance between fittings and indoor units
or outdoor units
≥20 inches ≥20 inches
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
49.2 49.2
If outdoor unit is below indoor unit
49.2 49.2
Additional Refrigerant Needed (oz/ft)
0.38 0.38
Refrigerant Piping System Limitations
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