Industrial chiller compressor can not start? What to do before starting?

Industrial Refrigeration Equipment - What can the industrial chiller fail to start? The compressor is the heart of the industrial chiller. If it fails to start, the entire unit will not function properly. When the compressor is started, it is necessary to know in detail the data range of various instruments and meters (such as thermometers, pressure gauges, flow meters, voltmeters, ammeters, etc.) during the normal operation of the industrial chiller refrigeration system, so that all kinds of data can be excluded based on relevant data. Industrial chiller operation failure. Industrial chiller compressor can not start? Can be ruled out by the following experience: 1, first check the main circuit. If the power supply has power, the voltage is normal, whether the fuse has been blown due to the start overload, the air switch is tripped, the switch contacts are good, and the power supply is missing phase. Observe the voltmeter and ammeter when starting, and when the chiller is not equipped with an ammeter or voltmeter, use a multimeter or a stylus to check the power supply. When the power supply voltage is too low, the compressor will not start. 2. For the piston refrigeration compressor, whether the shaft of the connecting rod big head bush and the curved sleeve is pivoted. These may be caused by the exhaust gas temperature being too high in the past operation, or it may be the coking of the lubricating oil, which causes the adhesion of the cylinder and the piston, so that the compressor cannot be started. 3, check the differential pressure relay and high and low voltage relays. When the compressor's oil pressure is abnormal (above or below a certain value), the compressor can be stopped. At the same time, when the compressor discharge pressure (high pressure) and suction pressure (low pressure) are abnormal, the compressor will not start immediately or after it has been started. 4, check the amount of frozen water, cooling water, water temperature is normal. If the water volume is small and the water temperature is high, the condensing pressure will rise sharply, and the evaporating temperature will drop rapidly. Because the unit protection facilities act, they often stop quickly. 5, check whether the relevant solenoid valve, regulating valve failure, whether to open or close as required. 6. Check whether there is leakage of working medium in the temperature sensing package of the temperature relay or if the adjustment is incorrect. Industrial chillers should generally do the work before they start: 1, first check the power is normal. The power supply voltage should not exceed or fall below ±10% of the rated voltage of the unit. Commonly used voltages include 3-phase 380V and single-phase 220V. When the voltage is too low or too high, the chiller cannot be started. 2. The compressor system of the water system carefully inspects the cooling water system and the chilled water system for water and water pressure, and whether the cooling water and chilled water piping systems are unblocked. 3. Check whether various pressure gauges, thermometers, flow meters, solenoid valves, relays, and energy regulating valves of the industrial chiller are intact. 4, check the transmission device, if the belt drive, its various protection devices are completely reliable, all kinds of wrong equipment, protective equipment is complete and effective. 5, check the industrial chiller high pressure system, low pressure system of various types of valves, in the start or run the switch state is correct. 6, check the crankcase lubricants. The oil level should not be lower than the indicated oil level, nor should it be higher than the indicated oil level. If the lubricating oil is not enough, add the same size, type of lubricant. 7. Check whether there is leakage in the industrial chiller refrigerant system and whether the lubricating oil system leaks oil. 8. Check whether the liquid level of the liquid storage tank is normal and the liquid level should be kept between one-third and two-thirds. 9. Read handover records, install and repair relevant records, reports and drawings. Johnson Machinery Tips: The role of industrial chillers is to provide industrial chilled water cooling equipment to ensure the stability of product quality, improve the entire plant's production efficiency. During use, it is necessary to carefully observe and listen to the sounds and abnormalities of the various components of the crew, and to regularly perform maintenance work on the chillers. When the units are not used for a long time, clean the water in the pipelines and cover the units with the objects, etc. . Chiller selection does not understand? Please refer to "Suggestions for Chiller Selection and Points to Be Noted in the Use of Evaporators"

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