The condensing unit (CDU) market features several players and possible technical layouts. In this complex context, the cornerstones of sustainability are the use of natural refrigerant and the adoption of high-efficiency technology. CAREL has developed a solution to embrace this transition: the Hecu solution.

Hecu is CAREL’s condensing unit proposal, a high-efficiency system tailored for commercial refrigeration - ideal for small to medium supermarkets and convenience stores. It brings together:

• DC inverter efficiency: wide modulation (25–100%) and precise envelope control reduce direct and indirect emissions while boosting part-load efficiency. 

• Continuous system modulation: BLDC compressors are synced with EEVs for unmatched temperature stability (±0.3 °C) and optimal energy consumption. 

• Refrigerant flexibility: supports natural refrigerants (CO₂), including transcritical CO₂ solutions for a real environmental and regulatory impact. 

• User-centric interfaces: wizard-based setup, pLD PRO HMI, and simple menus reduce installation complexity and training needs, aligned with the principle of effortless usability.

• Distributed intelligence: each unit features built-in control boards (Hecu) and DC drivers that manage compressors, EEVs, fans, defrost cycles, and alarms, while networking seamlessly through Modbus and cloud platforms (boss, RED) and enabling real-time supervision, predictive diagnostics, and firmware updates. 

All these components create the Hecu solution, where the continuous modulation approach ensures the most efficient operation and best food preservation at all times. 

Advanced high efficiency features include floating suction and integration with other devices such as the MPXPRO, where synchronisation between Hecu and MPXPRO can unlock the potential of smooth lines control and oil management, in a “SISTEMA” configuration. 

Read the brochure     Read the application note

The condensing unit can operate in different technical layouts, exploiting all the CO₂ options: MT transcritical, LT booster, and also two-stage compressors. 

CAREL Hecu for condensing units improves refrigeration system operation with: high efficiency, natural refrigerants, distributed intelligence, for efficient, low-impact, and smartly managed installations, right where they matter most.

For more information, visit Nat Ref CAREL or the product page.