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 errors: do not turn off the shell and tube before the start of the condenser inlet valve, 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. Thus, the utility model has the advantages of low cost, low cooling efficiency and increased failure rate.
        From the above error operation, the main engine cooling water temperature and condensation pressure rise. 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 childhood to learn some operators 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. Small series that the cooling water system is the correct operation:

A, before starting off shell and tube condenser inlet valve, prevent channeling water unit.

B, open the shell and tube condenser on the water inlet and outlet valves and cooling water pump, adjust the condenser inlet and outlet pressure

C, if the shell and tube condenser inlet and outlet water pressure gauge pointer swing is too large, indicating that the cooling water system with air, it is necessary to empty the gas in the unit, the pressure gauge should be normal.