MB Frigo selects Carel µRack solution

MB Frigo, an engineering and manufacturing company specialising in servicing air conditioning and refrigeration units based in Zagreb, has chosen Carel as its partner for equipping a refrigeration system in its new convenience store.

Carel says its new µRack control system features fast commissioning, simplified interaction, advanced connectivity, and energy saving functions.

“[µRack] offers an easy-to-navigate user interface and quick parameter setting, enabling unit commissioning and setup in record time,” the company says.

According to Carel and MB Frigo, the µRack control system provides three major benefits:

• NFC and Bluetooth connectivity to extend the features of the user interface, including interaction via the dedicated Carel Applica mobile app (simplified interaction)
• Management of modulating loads to ensure the highest efficiency: with 0-10V analogue outputs which enable variable-speed fans and compressors to always operate at the minimum conditions required by the cooling load based on the outside temperature (energy saving)
• A built-in ModBus protocol management and BMS serial port to enable the µRack controller to be connected directly to Carel or third-party supervisory systems, enabling further synergies for energy saving and alarm monitoring (direct connection to a supervisor).

“The new Carel μRack controller represents the ideal compromise in a context that sees the return of small supermarkets, where a complete system controller in a compact package is needed. The µRack solution was a perfect fit for our compressor rack, offering fast commissioning and wireless connectivity via NFC and Bluetooth,” says MB Frigo.

Two compressor lines (with up to 4+2 compressors), energy saving options (floating condensing stage control, compressor and fan modulation), compressor protection against liquid return and generic functions can be set using the Applica app, connected to the device via Bluetooth or NFC. According to Carel, everything can be easily configured via a user interface that simplifies unit configuration and commissioning in the field. The range also features a BMS port for connection to supervisory systems.

Carel says the µRack family will be further enhanced throughout the year by a model for management of transcritical CO₂ systems, making it easier to adopt natural refrigerants on condensing units and small compressor racks.