Some customers in the operation of screw chillers use process and formulated manufacturers differ, resulting in unit repair rate increase. Xiaobian that operation of screw type chiller also has rules, just like our car gear from 1 to 5 step by step, if the damage is easy to cause the leapfrog gear transmission. Screw type cold water machine in the operation of the existence of the error: before the boot did not close the water inlet valve shell tube condenser, which will cause water channeling phenomenon. Part of the cooling water flow away from the shell and tube condenser, which reduces the flow of cooling water pipe shell type condenser, causing condenser pressure rising, the host running current increases, lead to a decrease in the refrigeration quantity, serious will also cause the screw chillers stop working. This is the cost of electricity, so that the cooling efficiency is reduced, equipment failure rate increased.
From the beginning of the error operation, the cooling water temperature and condensation pressure of the main engine is increased. The unit will alert, will cause the wrong judgment to the operator, so the thought of cooling water is not enough, the water inlet valve and the condenser cooling water pump outlet valve open, there will be a cooling tower fan is opened, it will cause the cooling tower fan, water pump and power consumption increase, the cost will increase the number of. From a small series of operators to understand and even open the cooling water pump. To open the cooling water pump can reduce the condensing pressure and temperature of cooling water, so the pump power is wasted. Xiao Bian believes that the correct operation method of unit cooling water system is:
A, before starting off shell and tube condenser inlet valve, prevent channeling water unit.
B, open the inlet and outlet valves of the shell and tube condenser and the cooling water pump, adjust the inlet and outlet pressure of the condenser.
C, if the shell and tube type condenser water inlet and outlet pressure meter pointer swing is too large, it shows that the cooling water system has air, you need to empty the gas inside the unit, the pressure gauge to indicate the normal rear can be.