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Device Connection Limitations
A single-zone system consists 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 Vertical Air Handling Unit
refrigerant pipe system.
Table 47: Single-Zone Vertical Air Handling Unit Refrigerant Piping System Limitations.
System Model Name
LV180HV4, LV240HV4 LV360HV4, LV480HV, LV488HV
Pipe Length
(ELF = Equivalent
Length of Pipe in Feet)
Longest total equivalent piping length
164 feet 246 feet
Shortest total equivalent piping length
6.6 feet 6.6 feet
Distance between fittings and indoor or
outdoor units
≥20 inches ≥20 inches
No additional refrigerant
24.6 feet 24.6 feet
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
98 feet 98 feet
If outdoor unit is below indoor unit
98 feet 98 feet
Additional Refrigerant Needed (oz/ft)
0.43 0.43
System Layout
Figure 54: Typical LV180HV4 and LV240HV4 System Layout.
REFRIGERANT PIPING DESIGN
Design Guideline Summary
Outdoor Unit
Indoor Unit
A
B
Outdoor Unit
Indoor Unit
A
B
Unit = Feet
Max. Length = A
Max. Elevation = B
164 164
98 98
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
80 | APPLICATION
Single Zone Vertical Air Handling Unit Engineering Manual
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