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Supermarket refrigerated showcase The impact of refrigeration compressors (3)
author: supermarket refrigerated showcase category: commercial refrigeration Views: 484Time: 2016-08-22
Supermarket refrigerated showcase The impact of refrigeration compressors (3)
(5) If the ammonia pump is used for liquid supply, check that there are no obstacles at all operating parts of the ammonia pump.
(6) Start the cooling water pump to supply water to the condenser, compressor water jacket and crankcase cooling water pipe.
(7) When the supply voltage is not less than 10% of the rated voltage, the compressor can be powered on.
(8) The operation and management requirements of the refrigeration system after startup are the same as the trial operation, and will not be repeated.
Two-stage ammonia compressor unit operation
(1) Check whether the inlet and outlet valves of the supermarket refrigerated showcase intercooler and the inlet and outlet valves of the serpentine tube are all open.
(2) Check the liquid level of the intercooler, and it should be kept at the height of the center line of the float. When the pressure exceeds 0.5 MPa, it should be checked.
(3) The two-stage compressor must first start the high-pressure machine, when the intermediate pressure drops to 0.1MPa, the low-pressure machine can be started. When starting the suction valve of the low-pressure machine, it should be noted that the intermediate pressure and the current load of the high-pressure machine shall not exceed the specified requirements. If there are more than two low-voltage machines, one should be started first, and then start one by one after it runs normally. The starting operation method of high-pressure machine and low-pressure machine is the same as that of single-stage.
(4) The high-pressure stage exhaust temperature reaches 60°C, and liquid is supplied to the intercooler.
(5) According to the thermal load of the warehouse, open the relevant liquid supply valve appropriately. If the ammonia pump is used for liquid supply, the ammonia pump should be started according to the ammonia pump operation steps to supply liquid to the liquid sub-regulation station.
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LAST:The influence of walk-in cooler refrigeration compressor (2) NEXT:It will cause the compressor valve to be deformed or misplaced and damage the compressor. Therefore, it is only used when there is no way. In case of poor cooling effect or non-stop failure, use other methods to check that the compressor has no obvious ab
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