LG LMN078HVT Installation & Maintenance page 26

GENERAL INSTALLATION GUIDELINES
Refrigerant Piping
See table below for precalculated anticipated expansion for various pipe sizes and lengths of refrigerant tubing.
To find the anticipated expansion value:
1. From the table below, find the row corresponding with the actual feet of the straight pipe segment.
2. Estimate the minimum and maximum temperature of the pipe.
3. In the column showing the minimum pipe temperature, look up the anticipated expansion distance corresponding to the segment length.
Do the same for the maximum pipe temperature.
4. Calculate the difference in the two expansion distance values. The result will be the change in pipe length.
Table 16: Linear Thermal Expansion of Copper Tubing in Inches
Pipe
Length
1
35° 40° 45°
10
0.04 0.04 0.05 0.06 0.06 0.07 0.08 0.08 0.09 0.09 0.10 0.10 0.11 0.11 0.11 0.12 0.13 0.14 0.15 0.15
20 0.08 0.08 0.10 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.22 0.23 0.26 0.28 0.29 0.30
30 0.12 0.12 0.15 0.18 0.20 0.21 0.23 0.24 0.26 0.27 0.29 0.30 0.32 0.33 0.32 0.35 0.39 0.42 0.44 0.45
40 0.16 0.16 0.20 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.43 0.46 0.52 0.56 0.58 0.60
50
0.20 0.20 0.25 0.30 0.33 0.35 0.38 0.40 0.43 0.45 0.48 0.50 0.53 0.55 0.54 0.58 0.65 0.70 0.73 0.75
60
0.24 0.24 0.30 0.36 0.39 0.42 0.45 0.48 0.51 0.54 0.57 0.60 0.63 0.66 0.65 0.69 0.78 0.84 0.87 0.90
Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com.
1
Figure 18: Coiled Expansion Loops and Offsets
L
R
Large Tubing U-bend (>3/4 in.)
Table 17: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets
Anticipated Linear
Expansion (LE) (inches)
1/2
1
1-1/2
2
2-1/2
3
3-1/2
4
26
50° 55° 60° 65° 70°
L
1/4
R
6
1
L 38
2
R 9
1
L 54
2
R 11
1
L 66
2
R 12
1
L 77
2
R 14
1
L 86
2
R 15
1
L
94
2
R 16
1
L
102
2
R 17
1
L
109
2
Due to our policy of continuous product innovation, some specifications may change without notification.
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Fluid Temperature °F
75° 80° 85° 90° 95° 100° 105° 110° 115° 120° 125° 130°
R
Loop
Nominal Tube Size (OD) inches
3/8
7
44
10
63
12
77
14
89
16
99
17
109
19
117
20
126
MULTI
MULTI
L
Small Tubing U-bend (<3/4 in.)
1/2
8 9
50 59
11 13
70 83
14 16
86 101
16 19
99 117
18 21
111 131
19 23
122 143
21 25
131 155
22 26
140 166
F
F
MAX
3/4