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Refrigerant Line Size Information
Air
13AJN Series
Condensing Unit Refrigerant Line Size Information
Liquid Line
Line Size
System
Connection
(Inch O.D.)
Capacity
Size
[mm]
(Inch I.D.)
1/4 [6.35]
3/8 "
1
1
/
Ton
5/16*
[7.94]
2
[9.53]
3/8* [9.53]
1/4 [6.35]
3/8 "
2 Ton
5/16*
[7.94]
[9.53]
3/8* [9.53]
1/4 [6.35]
3/8 "
2
1
/
Ton
5/16*
[7.94]
2
[9.53]
3/8* [9.53]
3/8 "
5/16 [7.94]
3 Ton
[9.53]
3/8* [9.53]
3/8 "
5/16 [7.94]
3
1
/
Ton
2
[9.53]
3/8* [9.53]
3/8 "
3/8* [9.53]
4 Ton
[9.53]
1/2 [12.57]
3/8 "
3/8* [9.53]
5 Ton
[9.53]
1/2 [12.57]
NOTES: *Standard line size
N/A = Application not recommended.
Unit Size
Suction Line
Connection Size
Suction Line Run—
Feet [m]
Optional
25' [7.62]
Standard
Optional
Optional
50' [15.24]
Standard
Optional
Optional
100' [30.48]
Standard
Optional
Optional
150' [45.72]
Standard
Optional
NOTES: *Standard line size
Using suction line larger than shown in chart will result in poor oil return and is not recommended.
[ ] Designates Metric Conversions
24
Liquid Line Sizing (R-410A)
Liquid Line Size – Outdoor Unit Above Indoor Coil
(Cooling Only—Does not apply to Heat Pumps)
Total Equivalent Length—Feet [m]
25
50
75
100
[7.62]
[15.24]
[22.86]
[30.48]
Minimum Vertical Separation—Feet [m]
0
0
0
0
0
0
0
0
0
0
3 [0.91] 29 [8.84] 55 [16.76] 81 [24.69] 108 [32.92] 23 [7.01]
0
0
0
0
0
0
0
14 [4.27] 56 [17.07] 98 [29.87]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16 [4.88] 35 [10.67] 54 [16.46] 25 [7.62] 23 [7.01] 4 [1.22]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Suction Line Length/Size versus Capacity Multiplier (R-410A)
1
1
/
Ton
2 Ton
2
3/4" [19.05] I.D.
5
/
" [15.88 mm] O.D. Opt.
8
3
/
" [19.05 mm] O.D. Std.*
4
1.00
1.00
1.00
1.00
—
—
0.98
0.98
0.99
0.99
—
—
0.95
0.95
0.96
0.96
—
—
0.92
0.92
0.93
0.94
—
—
125
150
25
[38.10]
[45.72]
[7.62]
0
8 [2.44] 24 [7.32] 25 [7.62] 40 [12.19] 25 [7.62] 9 [2.74]
0
0
0
25 [7.62] 50 [15.24] 62 [18.90] 58 [17.68] 53 [16.15] 49 [14.94]
0
0
0
25 [7.62] 50 [15.24] 75 [22.86] 72 [21.95] 70 [21.34] 68 [20.73]
0
0
0
25 [7.62] 36 [10.97] 29 [8.84] 23 [7.01] 16 [4.88] 9 [2.74]
0
0
0
25 [7.62] 50 [15.24] 72 [21.95] 70 [21.34] 68 [20.73] 65 [19.81]
N/A
N/A
25 [7.62]
0
0
0
25 [7.62] 49 [14.94] 38 [11.58] 27 [8.23] 17 [5.18] 6 [1.83]
0
0
0
25 [7.62] 50 [15.24] 68 [20.73] 65 [19.81] 62 [18.90] 58 [17.68]
0
0
9 [2.74] 25 [7.62] 50 [15.24] 37 [11.28] 22 [6.71] 7 [2.13]
0
0
0
25 [7.62] 50 [15.24] 68 [20.73] 63 [19.20] 58 [17.68] 53 [16.15]
0
0
0
25 [7.62] 50 [15.24] 43 [13.11] 36 [10.97] 30 [9.14] 24 [7.32]
0
0
0
25 [7.62] 46 [14.02] 38 [11.58] 30 [9.14] 22 [6.71] 15 [4.57]
0
0
0
25 [7.62] 50 [15.24] 56 [17.07] 55 [16.76] 53 [16.15] 52 [15.85]
0
0
0
25 [7.62] 50 [15.24] 56 [17.07] 44 [13.41] 32 [9.75] 20 [6.10]
0
0
0
25 [7.62] 50 [15.24] 75 [22.86] 81 [24.69] 79 [24.08] 76 [23.16]
2
1
/
Ton
3 Ton
2
5
/
" [15.88 mm] O.D. Opt.
8
3
/
4
3
/
" [19.05 mm] O.D. Std.*
4
7
/
" [22.23 mm] O.D. Std.*
8
7
/
" [22.23 mm] O.D. Opt.
8
1.00
1.00
1.00
1.00
1.00
—
0.96
0.98
0.98
0.99
0.99
—
0.94
0.96
0.96
0.97
0.97
—
0.91
0.94
0.93
0.95
0.95
—
Liquid Line Size – Outdoor Unit Below Indoor Coil
Total Equivalent Length—Feet [m]
50
75
100
[15.24]
[22.86]
[30.48]
Maximum Vertical Separation—Feet [m]
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3
1
/
Ton
4 Ton
2
7/8" [22.23] I.D.
" [19.05 mm] O.D. Opt.
7
/
" [22.23 mm] O.D. Opt.
8
1
1
/
" [28.58 mm] O.D. Std.*
8
1.00
1.00
1.00
1.00
—
—
0.99
0.99
0.99
0.99
—
—
0.96
0.96
0.98
0.98
—
—
0.94
0.95
0.96
0.96
—
—
125
150
[38.10]
[45.72]
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
5 Ton
1.00
1.00
—
0.99
0.99
—
0.97
0.98
—
0.94
0.97
—
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