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refrigerAnT PiPing DeSign
design Guideline Summary/Selecting Field-Supplied copper tubing
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. Table 17 lists pipe length limits that must be
followed in the design of a Single Zone Wall Mount refrigerant pipe
system. Refer to Figure 18 for maximum length and elevation of
piping.
Table 17: 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)
Table 18: Linear Thermal Expansion of Copper Tubing in Inches.
Pipe
Length
1
35°
40°
45°
10
0.04
0.04
0.05
20
0.08
0.08
0.10
30
0.12
0.12
0.15
40
0.16
0.16
0.20
50
0.20
0.20
0.25
60
0.24
0.24
0.30
Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com.
1
44 | reFrIGerant deSIGn
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
50°
55°
60°
65°
70°
0.06
0.06
0.07
0.08
0.08
0.12
0.13
0.14
0.15
0.16
0.18
0.20
0.21
0.23
0.24
0.24
0.26
0.28
0.30
0.32
0.30
0.33
0.35
0.38
0.40
0.36
0.39
0.42
0.45
0.48
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 18: Single Zone System Layout.
Indoor unit
A
B
Outdoor unit
LS090HSV4
65.6
6.6
≥20 inches
32.8
32.8
0.22
Fluid Temperature °F
75°
80°
85°
90°
95° 100° 105° 110° 115° 120° 125° 130°
0.09
0.09
0.10
0.10
0.11
0.17
0.18
0.19
0.20
0.21
0.26
0.27
0.29
0.30
0.32
0.34
0.36
0.38
0.40
0.42
0.43
0.45
0.48
0.50
0.53
0.51
0.54
0.57
0.60
0.63
Unit = Feet
Max Length = A
Max Elevation = B
A
Indoor unit
LS120HSV4
LS180HSV4
65.6
6.6
≥20 inches
32.8
32.8
0.22
0.11
0.11
0.12
0.13
0.14
0.22
0.22
0.23
0.26
0.28
0.33
0.32
0.35
0.39
0.42
0.44
0.43
0.46
0.52
0.56
0.55
0.54
0.58
0.65
0.70
0.66
0.65
0.69
0.78
0.84
Outdoor unit
B
98.4
9.8
≥20 inches
49.2
49.2
0.38
0.15
0.15
0.29
0.30
0.44
0.45
0.58
0.60
0.73
0.75
0.87
0.90
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