Rheem Manufacturing Company
17
Condensing Unit Refrigerant Line Size Information
System
Capacity
Line Size
(Inch O.D.)
[mm]
Liquid Line Size – Outdoor Unit Above Indoor Coil
(Cooling Only – Does not apply to Heat Pumps)
Liquid Line Size – Outdoor Unit Below Indoor Coil
Minimum Vertical Separation—Feet [m]
Maximum Vertical Separation—Feet [m]
25
[7.62]
50
[15.24]
75
[22.86]
100
[30.48]
125
[38.10]
150
[45.72]
25
[7.62]
50
[15.24]
75
[22.86]
100
[30.48]
125
[38.10]
150
[45.72]
Total Equivalent Length—Feet [m]
Total Equivalent Length—Feet [m]
5/16 [7.94]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 62 [18.90] 58 [17.68] 53 [16.15] 49 [14.94]
1
1
/
2
Ton
1/4
*
[6.35]
0
0
0
0
8 [2.44] 24 [7.32] 25 [7.62] 40 [12.19] 25 [7.62] 9 [2.74]
N/A
N/A
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 75 [22.86] 72 [21.95] 70 [21.34] 68 [20.73]
3 Ton
5/16
*
[7.94]
0
0
0
0
0
9 [2.74] 25 [7.62] 50 [15.24] 37 [11.28] 22 [6.71] 7 [2.13]
N/A
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 68 [20.73] 63 [19.20] 58 [17.68] 53 [16.15]
3
1
/
2
Ton
5/16
*
[7.94]
0
0
0
16 [4.88] 35 [10.67] 54 [16.46] 25 [7.62] 23 [7.01] 4 [1.22]
N/A
N/A
N/A
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 43 [13.11] 36 [10.97] 30 [9.14] 24 [7.32]
4 Ton
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 46 [14.02] 38 [11.58] 30 [9.14] 22 [6.71] 15 [4.57]
1/2 [12.57]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 56 [17.07] 55 [16.76] 53 [16.15] 52 [15.85]
5 Ton
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 56 [17.07] 44 [13.41] 32 [9.75] 20 [6.10]
1/2 [12.57]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 75 [22.86] 81 [24.69] 79 [24.08] 76 [23.16]
5/16 [7.94]
0
0
0
0
0
0
25 [7.62] 49 [14.94] 38 [11.58] 27 [8.23] 17 [5.18] 6 [1.83]
2
1
/
2
Ton
1/4
*
[6.35]
0
14 [4.27] 56 [17.07] 98 [29.87]
N/A
N/A
25 [7.62]
N/A
N/A
N/A
N/A
N/A
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 68 [20.73] 65 [19.81] 62 [18.90] 58 [17.68]
5/16 [7.94]
0
0
0
0
0
0
25 [7.62] 36 [10.97] 29 [8.84] 23 [7.01] 16 [4.88] 9 [2.74]
2 Ton
1/4
*
[6.35]
0
3 [0.91] 29 [8.84] 55 [16.76] 81 [24.69] 108 [32.92] 23 [7.01]
N/A
N/A
N/A
N/A
N/A
3/8* [9.53]
0
0
0
0
0
0
25 [7.62] 50 [15.24] 72 [21.95] 70 [21.34] 68 [20.73] 65 [19.81]
3/8
″
3/8
″
3/8
″
3/8
″
3/8
″
3/8
″
Line Size
Connection
(Inch I.D.)
3/8
″
Liquid Line Sizing (R-410A)
Suction Line Length/Size versus Capacity Multiplier (R-410A)
Suction Line Run—
Feet [m]
3
/
4
" [19.05 mm] O.D. Opt.
7
/
8
" [22.23 mm] O.D. Std.*
7
/
8
" [22.23 mm] I.D.
Optional
Standard
Optional
Optional
Standard
Optional
Suction Line
Connection Size
Optional
Standard
Optional
3
/
4
" [19.05 mm] I.D.
Optional
Standard
Optional
3 Ton
4 Ton
2 Ton
Unit Size
1
1
/
2
Ton
5
/
8
" [15.88 mm] O.D. Opt.
3
/
4
" [19.05 mm] O.D. Std.*
25' [7.62]
1.00
1.00
N/A
1.00
1.00
N/A
1.00
1.00
N/A
1.00
1.00
N/A
50' [15.24]
.98
.99
N/A
.98
.99
N/A
.99
.99
N/A
.98
.99
N/A
100' [30.48]
.95
.96
N/A
.95
.96
N/A
.96
.98
N/A
.96
.97
N/A
150' [45.72]
.92
.93
N/A
.92
.94
N/A
.95
.96
N/A
.94
.95
N/A
2
1
/
2
Ton
1.00
1.00
1.00
.96
.98
.99
.94
.96
.97
.91
.93
.95
3
1
/
2
Ton
1.00
1.00
N/A
.99
.99
N/A
.96
.98
N/A
.94
.96
N/A
7
/
8
" [22.23 mm] O.D. Opt.
1
1
/
8
" [28.58 mm] O.D. Std.*
5 Ton
1.00
1.00
N/A
.99
.99
N/A
.97
.98
N/A
.94
.97
N/A
5
/
8
" [15.88 mm] O.D. Opt.
3
/
4
" [19.05 mm] O.D. Std.*
7
/
8
" [22.23 mm] O.D. Opt.
NOTES: *Standard line size
N/A = Application not recommended.
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