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The water-cooled screw chiller is one of the chillers. The water-cooled screw chiller has the characteristics of high efficiency and low overall energy consumption, and has been widely favored by many enterprises.

However, no matter what kind of mechanical equipment, maintenance is required during use. Otherwise, if it is not well maintained, it may cause some small problems or shorten the service life of the water-cooled screw chiller. Therefore, we must maintain the water-cooled screw chiller.

   Maintenance method of water-cooled screw chiller:

    1, screw compressor

    The screw compressor is a very critical component in the unit. The quality of the compressor is directly related to the stability of the unit.

    2, the check of the safety valve

    The condenser and evaporator on the screw chiller belong to the pressure vessel. According to the regulations, the safety valve should be installed on the high pressure end of the unit, that is, the condenser body. Once the unit is in an abnormal working environment, the safety valve can be automatically vented. Pressure to prevent high pressure damage to the human body. Therefore, the regular calibration of the safety valve is very important for the safety of the entire unit.

    3. Charge of refrigerant

    If there are no other special reasons, the general unit will not generate a large number of leaks. If a certain amount of refrigerant leaks due to improper use or after repair, it is necessary to re-add the refrigerant. To charge the refrigerant, you must pay attention to the grade of the refrigerant used by the unit.

    4, dry filter replacement

    The drying filter is an important part to ensure the normal circulation of the refrigerant. Since water and refrigerant are incompatible with each other, if the system contains moisture, it will greatly affect the operating efficiency of the unit. Therefore, it is very important to keep the internal drying of the system. The filter element inside the drying filter must be replaced regularly.

    5, replace the lubricant

    After long-term use of the screw chiller, the oil quality of the lubricating oil will deteriorate, and the impurities and moisture inside the oil will increase, which will affect the cooling effect of the chiller. Therefore, it is necessary to observe and check the oil quality regularly. Once the problem is found, it should be replaced in time, and the replacement lubricant grade must comply with the technical data.

    6, the condenser and evaporator cleaning

    Since the cooling water of the water-cooled condenser is an open circulation circuit, it is generally recycled through tap water through a cooling tower. When the content of calcium salt and magnesium salt in the water is large, it is easily decomposed and deposited on the cooling water pipe to form scale, which affects the heat transfer effect. Excessive fouling also reduces the flow cross section of the cooling water, reduces the amount of water, and increases the condensing pressure. Therefore, when the water quality of the cooling water used is poor, the cooling water pipe is cleaned at least once a year to remove scale and other contaminants in the pipe.