When the screw type chiller starts, it is necessary to determine which loop is the first to start, that is, in the cold water control panel, to determine the selection button on the "A" or "B" orientation. After determining the good press "ON" or "1" button, screw chillers can be launched.
        If we will be placed in the system of "A" range, so the earliest launch is A system at the top of the compressor, when increasing the load demand, after a few minutes of screw chillers will take the initiative to launch the B system at the top of the compressor; if demand continues to increase the load, then after a few minutes cold water machine A system of second compressors and will take the initiative to start again. Thus, the compressor of the two refrigerating circuit of the screw type water chiller starts to stop running in sequence.
        If we first select the button on the "B" position, then the first launch of the B system with the top compressor. According to the user demand for refrigeration system, a few minutes after the screw chiller and will take the initiative to launch A system at the top of the compressor, the compressor in order to launch later with, all two refrigeration circuit until the engine stop cold water machine.

       Why do we need to do more than the cold water? First, according to a production needs any open refrigeration loop therebetween; second, if a loop in trouble, can open another loop to ensure the no

       

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