TABLE 3
LIQUID LINE SIZING (R-410A)
14
NOTES:
*Standard line size
N/A - Application not recommended.
Liquid Line Size
Outdoor unit above or below indoor coil
(Heat Pump Only)
Total Equivalent Length - Feet [m]
Maximum Vertical Separation - Feet [m]
25 50 75 100 125 150
System
Capacity
1 1/2 Ton
2 Ton
2 1/2 Ton
3 Ton
3 1/2 Ton
4 Ton
5 Ton
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
3/8” [9.5]
1/4 [6.4] 25 [7.6] 40 [12.2] 25 [7.6] 9 [2.7] N/A N/A
5/16 [7.9] 25 [7.6] 50 [15.2] 62 [18.9] 58 [17.7] 53 [16.2] 49 [14.9]
3/8* [9.5] 25 [7.6] 50 [15.2] 75 [22.9] 72 [21.9] 70 [21.3] 68 [20.7]
1/4 [6.4] 23 [7.0] N/A N/A N/A N/A N/A
5/16 [7.9] 25 [7.6] 36 [10.9] 29 [8.8] 23 [7.0] 16 [4.9] 9 [2.7]
3/8* [9.5] 25 [7.6] 50 [15.2] 72 [21.9] 70 [21.3] 68 [20.7] 65 [19.8]
1/4 [6.4] 25 [7.6] N/A N/A N/A N/A N/A
5/16 [7.9] 25 [7.6] 49 [14.9] 38 [11.6] 27 [8.3] 17 [5.2] 6 [1.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 65 [19.8] 62 [18.9] 58 [17.7]
5/16 [7.9] 25 [7.6] 50 [15.2] 37 [11.3] 22 [6.7] 7 [2.1] N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 68 [20.7] 63 [19.2] 58 [17.7] 53 [16.2]
5/16 [7.9] 25 [7.6] 23 [7.0] 4 [1.2] N/A N/A N/A
3/8* [9.5] 25 [7.6] 50 [15.2] 43 [13.1] 36 [10.9] 30 [9.144] 24 [7.3]
3/8* [9.5] 25 [7.6] 46 [14.0] 38 [11.6] 30 [9.144] 22 [6.7] 15 [4.5]
1/2 [12.7] 25 [7.6] 50 [15.2] 56 [17.1] 55 [16.8] 53 [16.2] 52 [15.8]
3/8* [9.5] 25 [7.6] 50 [15.2] 56 [17.1] 44 [13.4] 32 [9.8] 20 [6.1]
1/2 [12.7] 25 [7.6] 50 [15.2] 75 [22.9] 81 [24.7] 79 [24.1] 76 [23.2]
Line Size
Connection Size
(Inch I.D.) [mm]
Line Size
(Inch OD)
[mm]