Title: +038=67.011-##033._01-Ø1_Aggregat.pdf
■ 4.3. Refrigerant charge Charge the system using only the refrigerant for which the unit has been designed. Refrigerant charging should always take place in the liquid phase in order to maintain the correct blend of azeotropic refrigerants. Pre-charging should be performed on the liquid piping. The remaining refrigerant can be charged in the suction line until the nominal operating conditions of the system are reached (operational installation). Please consult the section on “Pre-start checks” before switching on. Never start the compressor under a vacuum, whether high or low pressure, and ensure that the compressor housing is pressurized. To do this, it is recommend to slowly charge the refrigeration circuit to 4 or 5 bar when using R404A, and approximately 2 bar when using R-134a.