µRack CO2

µRack CO₂ is CAREL’s compact controller for the management of condensing units and small transcritical CO₂ compressor racks. 
The main feature of the proposal is NFC and Bluetooth connectivity which, through the Applica app for mobile devices, extends the features of traditional user interfaces, simplifying interaction with the controller by making the functions available directly from a smartphone or tablet.
µRack CO₂ can manage the following typical compressor rack configurations:

• up to 2 suction lines, maximum 4 compressors on a single line or in configurations such as 2+2, 3+1, etc.
• compressor types: modulating, timed, rotation, and inverter
• gas cooler fans (on/off, modulating)
• high pressure valve (HPV) control
• FGV control for liquid receiver pressure
• single-stage heat recovery
• direct connection to CAREL or third-party supervisory systems (Modbus protocol)
• algorithms for managing system safety and optimising efficiency (Floating Condensing and Floating Suction)

The high flexibility means the controller can be used in stand-alone mode to manage just the HPV and FGV valves (with optional management of the compressors/gas cooler fans).
Completing the proposal is a software suite of useful tools for each stage of the system life cycle: from design and end-of-line configuration/testing, to maintenance in the field.