Specification for refrigerants and refrigerants for water-cooled screw chillers-dongxing refrigeration

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2021-05-13 10:40:40深圳市东星制冷机电有限公司东星制冷

Refrigerant charging regulation the refrigerant used in water-cooled screw chillers is R22. Before charging, make sure that the refrigerant type to be charged is R22. The water-cooled screw chillers have been filled with refrigerant, which is only required if the system leaks. The refrigerant charging port and the refrigerant cylinder of the compressor should be connected according to the refrigerant pressure combination table. Open the outlet on the refrigerant pressure gauge first, and then open the refrigerant cylinder to drain the air in the connecting tube. After the air is exhausted, close the refrigerant cylinder, open the water-cooled water chiller, open the refrigerant cylinder after the start of the water chiller, fill the refrigerant, according to the reading on the refrigerant pressure combination table of the refrigerant saturation physical parameters table. (the outlet temperature of chillers is generally 5 °c higher than the condensing temperature of chillers and the evaporator temperature) . More and less refrigerants will affect the normal operation of the whole unit. When adding refrigerants, it is suggested to find professional water cooler maintenance personnel or professional personnel with refrigeration operation certificate. 2: FROZEN OIL FILLING RULES 1, frozen oil model and dosage: water-cooled screw chiller used for the frozen oil model is Suniso 5GS, frozen oil filling capacity is 12L, filling strictly in accordance with the model and filling. 2, Refrigeration Oil Replacement Cycle following table operation exhaust temperature 65 °c-75 °c 75 °c-85 °c 85 °c-95 °C 95 °c-105 °C 105 °C above replacement time (H)100008000400015005003, change refrigeration oil operation method 1 return system refrigerant to condenser side, the refrigerant in the compressor is excluded, and the frozen oil is discharged from the oil outlet of the compressor. The refrigerant oil of the compressor is released from the drain port of the oil filter, and when the refrigerant oil is nearly exhausted, from the high-pressure end of the compressor detection joint (add a certain amount of nitrogen, with pressure to speed up the cooling oil discharge, stop injection pressure, close the drain port. Then the compressor oil filter removed, the oil tank will be all the frozen oil out, and then the oil filter installed after cleaning fastening. Fill with freezing oil according to standard quantity of compressor. While the system is being evacuated. Vacuum pump contact suggested to choose high (low) pressure side angle valve or other relatively high point, to prevent the damage to the vacuum pump frozen oil. Carry out vacuum pressure or leak detection, observe whether the pressure rebound. 4 pour the oil into the oil tank and connect it to the drain port with a clean plastic pipe. Put the other end of the plastic pipe in the oil tank (the plastic pipe is placed at the bottom of the oil tank) . The oil barrel should be sealed to reduce the air pollution to the oil.

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