Return water temperature and water temperature detection unit (1 unit normal): boot after 30 minutes through the parameters of the unit control system check chilled water system system or unit water thermometer, water temperature, water temperature can be read out when the unit operation, to ensure that the difference in 4-6 degrees, if the difference in temperature of water. Large, said water flow water system through the plate is too small, which may cause the unit can not operate normally or damage.
The water inlet pipe of the pressure detection unit 2: through the detection of back pressure and outlet pressure value, and then in the random instructions set Richard water flow of the cold water machine in the import under the water pressure difference is the number of instructions by referring to the unit water flow corresponding to the table or graph, to determine the water system is normal and through; this difference to determine what a water pipe resistance value is too large, and make corresponding rectification plan and action.
3 compressor suction temperature detection tube (detection only in the refrigeration operation): if the refrigeration boot operation after 30 minutes to detect the compressor suction temperature below 0 degrees, the water side heat exchanger water flow not enough to cause the evaporation temperature and pressure drop, and also lead to evaporation of freon in the evaporator to the compressor suction the pipeline will lead to heat, suction temperature of the compressor is less than 0 degrees; in addition to the set point is too low and lead to the exclusion of water evaporation pressure and evaporation temperature drop and low temperature; non-standard units as long as 6 to 8 DEG C to ensure the compressor suction superheat can be considered normal. Therefore, under normal water flow, the suction temperature of the compressor will generally be greater than 0 DEG C, below this value need to exclude water system problems.
4 pump running current detection: by detecting water running current, compared with the rated current, can be judged for the actual water flow than the rated pump water flow is large or small, and in front of several parameters together with the comprehensive judgment, in order to obtain an exact test of water system analysis report.
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