NOTE: Evacuate the A/C system before charging.
Close the low-side valve on the control panel.
Open the high-side valve on the control panel.
Refer to the manufacturer's instructions for the charging station in use.
Enter the amount of refrigerant needed to charge the A/C, making sure to use the correct system of measurement, i.E. Kilogram (kg) or pound (lb).
Begin the charging process.