Final Charging Procedure for Partially Charged Units on Empty Containers R-23

Note The R-23 refrigerant should be charged with the container empty, the unit OFF and all refrigeration system components above -5 C (23 F). The R-134a compressor must not have been operated within the past 30 minutes and there must not be frost on the plate-type R-134a / R-23 heat exchanger tubing.

  1. Before attempting to add R23 refrigerant with loaded container check for good cooling capacity by verifying if Suction discharge pressure is in line with specification.

  2. Connect a refrigerant hose to a R-23 refrigerant tank.

  3. Connect the refrigerant hose to the suction line service port. Be sure to purge the air from the refrigerant hose.

  4. Mid-seat the suction service valve.

  5. Set the R-23 refrigerant tank for gas charging. Open the refrigerant tank hand valve.

  6. Observe both the suction and discharge pressures on the unit gauges. When the unit pressure reaches 1700 kPa, 17 bar, 247 psig, close the hand valve on the refrigerant tank. With the unit OFF, the suction and discharge readings should be equal.

    The R-23 refrigerant pressure in the unit during charging with the unit OFF will vary with the ambient temperature:

    Ambient Temperature R-23 System Pressure
    O °C (32 °F) 1600 kPa, 16 bar, 232 psig
    20 °C (68 °F) 1700 kPa, 17 bar, 247 psig
    38 °C (100 °F) 1800 kPa, 18 bar, 261 psig

  7. Remove the gauge manifold set.

  8. Cap all service ports and valve stems.

Parent topic: Charging System with Refrigerant