The cold water unit's turn on and stop order must ensure that the air conditioning host can operate normally after starting, and it must:
Otherwise, the cooling temperature and corresponding condensing pressure of the chiller will be too high, causing the operation of the high-pressure protection device of the chiller to stop or even cause failure.
Cooling water should circulate in the evaporator, otherwise it will stop because the cold water temperature is low, causing the action of the cold water temperature protection device to stop, or because the evaporation temperature and the corresponding evaporation pressure are too low, which is the action of the low-pressure protection device of the chiller, and even causes the freezing of the cold water in the evaporator to damage the equipment. Therefore, the starting order of the chiller is :(it must be strictly observed) when the cooling tower fan is on -- > cooling water pump is on -- > cold water pump is on -- > cold water unit is on -- (it must be strictly observed) when the chiller is off -- > cooling tower fan is off -- > cooling water pump is off -- > cold water pump is off
