Single Zone Engineering Bulletin

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46 | REFRIGERANT DESIGN
Art Cool
™
Mirror Wall Mounted Engineering Manual
REFRIGERANT PIPING DESIGN
Figure 18: Art Cool Mirror System Layout.
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Max Length = A
Max Elevation = B
Unit = Feet
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 19 lists pipe length limits that must be
followed in the design of a Single Zone Art Cool Mirror refrigerant
pipe system. Refer to Figure 18 for maximum length and elevation of
piping.
Table 19: Single-Zone Art Cool Mirror Wall-Mount Refrigerant Piping System Limitations.
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Longest total equivalent piping length
LA090HSV4 LA120HSV4 LA180HSV4
65.6 feet 65.6 feet 98.4 feet
Shortest total equivalent piping length
6.6 feet 6.6 feet 9.8 feet
Distance between fittings and indoor units
or outdoor units
≥20inches ≥20inches ≥20inches
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
32.8 feet 32.8 feet 49.2 feet
If outdoor unit is below indoor unit
32.8 feet 32.8 feet 49.2 feet
Additional Refrigerant Needed (oz/ft)
0.22 0.22 0.38
Pipe
Length
1
Fluid Temperature °F
35° 40° 45° 50° 55° 60° 65° 70° 75° 80° 85° 90° 95° 100° 105° 110° 115° 120° 125° 130°
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
1
Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com.
Table 20: Linear Thermal Expansion of Copper Tubing in Inches.