Development of a Control and Monitoring Circuit for a Chilled Water Machine (Chiller)

In this paper, a monitoring and control circuit for an air-cooled chilled water machine has been developed to replace an old expensive electronic control panel, so that the new control circuit covers all control functions of the old panel with greater efficiency and lower cost. The chiller mechanism and its components are characterized, and the alternative control circuit and its hardware and software components are described. A temperature controller and a set of electric drive elements are used. A simulation of the drive circuit was performed using Automation Studio. The user interface created in the (LAB VIEW) environment and connected to the (Arduino MEGA) allows to view the operating condition of the chiller, fault cases and water temperature at the inlet and outlet of the machine. The last section of the paper discusses the test results of the monitoring and control circuit designed and implemented by us.