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Tonnage *
-24
-36
-48
-60
* Applicable to all minor revision numbers unless otherwise specified.
** Some applications may require a field-provided 1-1/8" to 7/8" adapter.
Table 3. Standard Refrigerant Line Set – Up to 50 Linear Feet in Length
Maximum Total
Tonnage
Equivalent
Length (ft)
-24
-36
180
-48
-60
Tonnage
Line SIze
-24
3/8"
3/8"
-36
1/2"
3/8"
-48
1/2"
3/8"
-60
1/2"
NOTE: Shaded rows indicate rated liquid line size.
A. Find your tonnage on the left side of the table.
B. Start with the rated liquid line size (shaded row) on the outdoor tonnage.
C. Select the actual Total Linear Length of your system shown at the top of the table.
D. The elevation listed in the table is the maximum allowed for the liquid line listed.
E. Select or consider the larger liquid line size shown in the table if the elevation does not meet your requirements.
Page 6 of 26
Valve Size Connections
Liquid Line
3/8" (10mm)
Maximum Linear
Maximum Vapor
(actual) Length
(ft)
150
Table 4. Line Set Guidelines – 51 to 150 Linear Feet in Length
25
50
25
50
25
50
25
50
25
50
25
50
25
50
25
50
Table 5. Liquid Line Diameter Selection
Suction Line
3/4" (19mm)
7/8" (22mm)
1-1/8" (29mm) **
Maximum Linear
Riser (ft)
Liquid Lift (ft)
60
60
Total Linear Length (ft.)
75
60
60
60
50
60
36
60
Issue 2250
Recommended Line Sets
Line Set Length
30' (9.1m)
40' (12.2m)
50' (15.2m)
Field-fabricated
Preferred Vapor
Line Sizes for
Horizontal Runs
7/8"
100
125
60
60
56
51
60
60
41
31
60
60
22
8
60
60
508311G01 / 31-5000754
Required Vapor
Riser Size
5/8"
3/4"
7/8"
150
60
45
60
22
60
NR
59
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