Wuxi Guanya Refrigeration Technology co., ltd

What should I pay attention to when replacing a water-cooled chiller compressor

Once the compressor of the water-cooled chiller fails, the compressor needs to be replaced in time, but the replacement of the compressor is not as simple as imagined.

Before the water-cooled chiller compressor is replaced, the reasons for the damage to the original compressor must be checked, and the defective parts must be replaced. Because the damage of other parts of the water-cooled chiller will directly cause damage to the compressor. After removing the original damaged compressor, the system must be purged with nitrogen before the new compressor system can be connected.

During the welding operation of the water-cooled chiller, in order not to form an oxide film on the inner wall of the copper pipe, it is recommended to pass in nitrogen gas, and the time to pass the nitrogen gas should be sufficient. It is forbidden to use the compressor as a vacuum pump to empty the air in the pipeline of the external machine when replacing the compressor or other parts, otherwise the compressor will be burned, and a vacuum pump must be used to vacuum. When replacing, you must add refrigerating oil that meets the nature of the compressor, and the amount of refrigerating oil should be appropriate. Generally speaking, the new original compressor has refrigerating oil.

When replacing the water-cooled chiller compressor, the filter drier must be replaced in time. Because the desiccant in the desiccant filter has been saturated and has lost the water filtering function, clean the refrigerating oil in the original system. Because the new pump has been injected with sufficient mass-produced refrigerated lubricating oil, refrigerating oils of different brands cannot be mixed, otherwise it will Deterioration causes poor lubrication, causing the compressor to pull cylinders, turn yellow, and burn.

When replacing the compressor of a water-cooled chiller, attention should be paid to prevent excessive refrigerating oil in the system, otherwise the heat exchange effect of the system will be reduced, which will increase the pressure of the system and damage the system and the compressor. Do not fill the refrigerant too fast, otherwise it will cause liquid shock, which will cause the valve plate to break and cause the compressor to lose pressure.

After the compressor of the water-cooled chiller is installed, check that the compressor is working normally, such as: suction pressure/temperature, discharge pressure/temperature, oil pressure differential pressure and other system parameters. If the parameter exceeds the normal value, the reason for the abnormal system parameter must be clarified.

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