(1) unparalleled reliability: a step approach to achieve the required capacity of air, the unit has spare capacity. Major equipment failures greatly reduce the possibility; the unparalleled reliability of the refrigeration system to run. (2 run economy - is running at maximum efficiency modular units: the unit broken down into modular structure, changes in the load from the smallest to the largest case, the unit's output and the load always maintain the best match, saving operating costs ; compared with conventional chiller operating cost savings of 20-26%, air-conditioning cooling capacity can automatically increase or decrease the load changes. (3) small size and light weight: due to the cooler is divided into several modules, one module very convenient to transport and lifting. (4), small vibration, low noise: the compressor and took a large well-designed noise attenuation measures and isolation devices, and the large-scale chillers significantly reduced compared to the noise. (5) maintenance and repair Low cost: The closed compressor and plate heat exchanger, coupled with automatic conversion start and stop each computer running the compressor to ensure that the use of each unit approximately the same time, extend the life of the unit, reducing maintenance and repair costs. and modular design allows itself has spare capacity, maintenance can be non-stop manner, so as not to affect the whole cooling system to work properly. (6) units started directly reduce the impact of current: computer control unit starts the compressor followed by the start not only saves energy needed to control the start, but also greatly reduce the impact of current power instantly. reduce the power load, reduce distribution capacitors.