29
Refrigerant Piping Connections
Due to our policy of continuous product innovation, some specifications may change without notification.
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• ARUN038 = 6
• ARUN048 = 8
• ARUN053 = 9
IDU = Indoor Unit
ODU = Outdoor Unit
All elevation limitations are measured in actual feet
ELF = Equivalent length of pipe in feet
Copper Tubing Size
2'
Equivalent Pipe Length*
Standard 90° Elbow
0.6
0.9
1.3
1.6
1.9
2.5
Long Radius 90° Elbow
0.4
0.6
0.8
1.0
1.3
1.7
Street 90° Elbow
1.0
1.6
2.1
2.6
3.1
4.2
Standard 45° Elbow
0.3
0.5
0.7
0.8
1.0
1.3
Street 45° Elbow
0.5
0.8
1.1
1.4
1.6
2.2
Y-Branch
1.6
1.6
1.6
1.6
1.6
1.6
Header
3.3
3.3
3.3
3.3
3.3
3.3
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The equivalent length of a FULL port ball valve is the physical length of the valve. In other words, treat as straight
pipe. A full port ball has the same bore diameter as the connected pipe.
Table 16:
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Values calculated based on formula and factors from www.sporlanonline.com.
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Pipe Length
Longest total
984 ELF
Longest distance
from ODU to IDU
492 feet (Actual)
574 feet (Equivalent)
Distance Between
Fittings and IDUs
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IDU to any Y-Branch
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first Y-Branch to farthest IDU
131 feet
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IDU to Y-Branch
3 feet
Elevation
If ODU is above IDU
164 feet
If ODU is below IDU
131 feet
Between any two IDUs
49 feet
Table 17:
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Total Piping Length Cannot Exceed 984 Feet
Longest Piping Length After First Branch
Maximum 131 Feet
Level Difference Between IDU and IDU
Maximum 49 Feet
Outdoor Unit
Longest Piping Length
Maximum 492 Feet (Actual)
Maximum 574 Feet (Equivalent)
If the Outdoor Unit Is Mounted Below the Indoor Unit(s)
Figure 32:
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If the Outdoor Unit is Mounted Above the Indoor Unit(s)
Longest Piping Length
Maximum 492 Feet (Actual)
Maximum 574 Feet (Equivalent)
Actual Pipe Length—Actual Physical Length of a Pipe
Level Difference Between IDU and IDU
Maximum 49 Feet
Level Difference Between
ODU and IDU
Maximum 164 Feet
Total Piping Length Cannot Exceed 984 Feet
Outdoor Unit
Longest Piping Length After First Branch
Maximum 131 Feet
REFRIGERANT PIPING CONNECTIONS
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