German component manufacturer Eckelmann AG has expanded its portfolio with the launch of a compact transcritical CO2 refrigeration controller, the Virtus Pack Controller (VPC 5000), which is capable of controlling up to three MT and three LT compressors.
The VPC 5000 includes all functions needed to ensure “highly efficient and safe” operation of CO2 transcritical booster systems, Eckelmann said in a statement. This includes low-, high- and medium-pressure control, gas coolers, fan control, refrigerant collectors and connection of heat recovery systems.
“Apart from the Virtus 5 system control unit, refrigeration case controllers and a single pack controller, refrigeration companies will not need any other electronic control components for the reliable operation of CO2 integrated systems in the future,” Eckelmann said.
The VPC 5000 is very compact with dimensions of 255mm wide x 130mm high x 100mm depth (10in x 5.1in x 3.9in). The units have no lateral connections, allowing for gapless series installations on the top-hat rail. “Well thought-out connection technology not only reduces the time required for commissioning and servicing, but also prevents potential damage due to inappropriate wiring,” Eckelmann said.
The VPC 5000 units cab be operated remotely via an internet browser. It can also be operated onsite via an “easily accessible” USB service interface, handy in case of network issues. However, it does have both Ethernet interface and CAN bus, increasing the connection reliability.
The controller has a variety of input and output options. For outputs it has eight 230 VAC/6 A relays, and six analog outputs for speed control of fans and compressors, control of high and medium pressure valves, for gas cooler control, and additional functions.
It has 21 digital inputs to record system operating status, and analog inputs to record outside and room temperatures plus gas cooler outlet temperature. Additional analogue inputs include pressure transmitters, humidity sensors, and read back of opening degree of high-pressure valve.
“Apart from the Virtus 5 system control unit, refrigeration case controllers and a single pack controller, refrigeration companies will not need any other electronic control components for the reliable operation of CO2 integrated systems in the future”Eckelmann
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