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Device 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. The table
below lists pipe length limits that must be followed in the design of a Single Zone
Mega, Standard Efficiency, or Mega 115V refrigerant pipe system. Refer to the
figure at right for maximum length and elevation of piping.
Table 55: Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mount Refrigerant Piping System Limitations.
Model Numbers
Pipe Sizes
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
Additional Refrigerant Needed (oz/ft)
REFRIGERANT PIPING DESIGN
LS090HEV2, LS120HEV2,
LS090HFV3, LS120HFV3
Vapor
Liquid
Standard Piping Length
Piping Length with No
Additional Refrigerant
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
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 41: System Layout.
Max Length = A
Max Elevation = B
Indoor unit
LS180HEV2, LS240HEV2,
LS180HFV3, LS240HFV3
3/8 inches
1/2 inches
1/4 inches
1/4 inches
24.6
24.6
49.2
9.8
≥20 inches
≥20 inches
23 feet
32.8 feet
23 feet
32.8 feet
0.22
Design Guideline Summary
A
A
B
Outdoor unit
Indoor unit
LS090HXV2, LS120HXV2
3/8 inches
1/4 inches
24.6
24.6
65.6
9.8
≥20 inches
23 feet
23 feet
0.26
APPLICATION GUIDELINES | 83
Unit = Feet
Outdoor unit
B
24.6
24.6
49.2
9.8
0.22
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