Answer: There are national standards for the pressure of condenser of refrigeration equipment. High pressure of refrigerant is called condensation pressure, and its reading should be 1.4~2.5MPa. If it is lower than this range, check and adjust the cooling water volume; low pressure is called evaporation pressure, which usually ranges from 0.4~0.55MPa. If it is not in this range, the screw of hot gas bypass valve should be adjusted.
In normal operation, the condensation pressure of R22 should not exceed 1.5MPa. Long-term operation under high condensation pressure will affect the service life of refrigeration compressor. In addition, the dryer is equipped with high pressure protection device.
