13 - 16 SEER Single-Stage Air-Conditioners
Unit Size
Allowable
Liquid Line
Size
Allowable
Suction Line
Size
Apply Long Line
Guidelines if Linear Line
Length Exceeds Those
Shown Below (Feet)
Equivalent Length (Feet)
< 25 26-50 51-75 76-100 101-125 126-150 151-175 176-200 201-225 226-250
(-)A13 A/B Maximum Vertical Rise (Outdoor Unit Below Indoor Unit) * / Capacity Multiplier
4 Ton
3/8" 3/4" 148 25 / 0.99 50 / 0.98 75 / 0.96 77 / 0.95 67 / 0.93 57 / 0.92 46 / 0.91 NR NR NR
1/2" 3/4" 74 25 / 0.99 50 / 0.98 75 / 0.96 100 / 0.95 100 / 0.93 100 / 0.92 100 / 0.91 NR NR NR
3/8" 7/8" 148 25 / 1.00 50 / 0.99 75 / 0.99 77 / 0.98 67 / 0.97 57 / 0.97 46 / 0.96 36 / 0.96 26 / 0.95 15 / 0.95
1/2" 7/8" 74 25 / 1.00 50 / 0.99 75 / 0.99 100 / 0.98 100 / 0.97 100 / 0.97 100 / 0.96 100 / 0.96 99 / 0.95 97 / 0.95
5 Ton
3/8" 3/4" 78 25 / 0.99 50 / 0.97 75 / 0.94 61 / 0.92 46 / 0.90 NR NR NR NR NR
1/2" 3/4" 39 25 / 0.99 50 / 0.97 75 / 0.94 100 / 0.92 100 / 0.90 NR NR NR NR NR
3/8" 7/8" 78 25 / 1.00 50 / 0.99 75 / 0.98 61 / 0.97 46 / 0.96 32 / 0.95 18 / 0.94 NR NR NR
1/2" 7/8" 39 25 / 1.00 50 / 0.99 75 / 0.98 100 / 0.97 100 /0.96 100 / 0.95 97 / 0.94 95 / 0.94 92 / 0.93 89 / 0.92
3/8" 1-1/8" 78 25 / 1.01 50 / 1.01 75 / 1.00 61 / 1.00 46 / 0.99 32 / 0.99 18 / 0.99 NR NR NR
1/2" 1-1/8" 39 25 / 1.01 50 / 1.01 75 / 1.00 100 /1.00 100 / 0.99 100 / 0.99 97 / 0.99 95 / 0.99 92 / 0.99 89 / 0.98
14
Air Refrigerant Line Size Information
RA13 Series
Refrigerant Line Size Information (con’t.)
NOTES:
1) Do not exceed 200 ft linear line length.
2) *Do not exceed 100 ft vertical separation if outdoor unit is above indoor unit.
3) **3/4" suction line should only be used for 1.5 ton systems if outdoor unit is below or at same level as indoor to assure proper oil return.
4) Always use the smallest liquid line allowable to minimize refrigerant charge.
5) Applications shaded in light gray indicate capacity multipliers between 0.90 and 0.96 which are not recommended, but are allowed.
6) Applications shaded in dark gray are not recommended due to excessive liquid or suction pressure drop.
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