Product data

Refrigerant Lines – 38CG, CS, SB, & SC
1. The 38CG, CS, SB, & SC series condensers are shipped with a full charge of R-22 refrigerant. Since all
refrigerant lines are on the low side of the system, it is not normally necessary to add or remove charge.
2. The 38CG, CS, SB, & SC series have mixed phase refrigerant flow in the liquid line. DO NOT install a filter
drier in the liquid line. The liquid line must be insulated.
3. No line size changes should be made.
4. All charges, line sizes, and capacities are based on 25 feet of refrigerant lines. For runs over 25 feet see Long
Line Applications.
Note: For runs less than 25 feet, some of the charge may need to be removed to obtain the correct
system superheat. The minimum line length should be 8 feet.
5. Refrigerant lines should not be buried in the ground. If it is necessary to bury the lines, not more than 36”
should be buried. Provide a minimum 6” vertical rise to the service valves to prevent refrigerant migration.
6. The vapor line must be insulated. Use a minimum of 3/8”” thick insulation. Closed cell insulation is
recommended in all long line applications.
7. Special consideration should be given to isolating interconnecting tubing from the building structure. Isolate
the tubing so that vibration or noise is not transmitted into the structure.
Long Line Applications
1. Refrigerant lines: DO NOT resize lines for additional length. The liquid line must be insulated. Size lines per
the following table:
Capacity Liquid Vapor
1.5 Ton ¼” dia ½” dia
2.0 Ton 3/8” dia 5/8” dia
2.5 Ton 3/8” dia 5/8” dia
2. Be sure oil can be properly returned to the compressor. Consult the Bryant Systems Design Guide for proper oil
return recommendations. For line lengths from 8 to 26 feet no special piping requirements are normally
required. For lengths over 26 feet add 0.9oz of refrigerant and 0.35oz of oil for each additional foot of tubing
used.
3. A capillary metering device is used for this series of condensers.
4. Horizontal configuration Diagram #1
a. Slope the vapor line toward the indoor unit to provide for refrigerant migration protection during the
off cycle due to temperature differences caused by slight elevation changes between indoor and
outdoor units. A solenoid valve is not required.
5. Elevated configuration: (Lift) Indoor unit above outdoor unit Diagram #3
a. The maximum elevation difference and the maximum equivalent length of piping is shown in the table
below.
Capacity Difference Equivalent Length
1.5 Ton 49’ 98’
2.0 Ton 66’ 131’
2.5 Ton 33’ 98’
b. Install an inverted trap in the vapor line. The top of the trap must be above the top of the indoor unit.
This prevents the refrigeration from collecting in the vapor line. MORE ON NEXT PAGE