Air conditioning control module EVD

DIN rail

The EVD evolution series of controllers for electronic valves is the latest step in the development of the famous CAREL drivers for superheat control. Compared to the standard EVD, this instrument adds advanced functions and a new user interface that makes it even easier to use and configure. A new graphic display and a simple programming procedure allow the controller to be started by selecting just 4 parameters: refrigerant used, model of valve, type of pressure probe and application (chiller, display cabinet, etc.), selected from the multiple choice menus. EVD evolution is complete with LEDs for controlling the main functions, and can house a removable LCD display for the configuration and monitoring of all the variables. EVD evolution can be connected to the pCO series controllers or PlantVisorPRO for the integrated management of the driver via tLAN (EVD0000E00), pLAN (EVD0000E10) or RS485/Modbus® (EVD0000E20); it can also operate independently (stand-alone version) using a digital input to switch the device ON/OFF. EVD evolution can also act as a simple positioner, with a 4 to 20 mA or 0 to 10 V analogue input signal. The new EVD evolution series can manage other functions in addition to superheat control, such as hot gas bypass, evaporator pressure control (EPR) and control of the valve downstream of the gas cooler in circuits with CO2 transcritical cycle; other control functions include the management of the condenser pressure or the modulating thermostat function.