Air-Cooled Free Cooling Chiller

Liebert HPC-S
60 – 500 kW

A compact and environmentally responsible solution optimized for small and medium-sized data centers, combining scroll compressor technology, a wide operating range and low-GWP refrigerant options.

Scroll Free Cooling Chiller

Liebert HPC-S

Future-ready cooling with low-GWP refrigerants and high efficiency.

Liebert HPC-S is a compact scroll-compressor solution designed to support the sustainability goals of modern data centers. In addition to standard models, it is compatible with next-generation low-GWP refrigerants such as R454B and R1234ze.

Its optimized free cooling coils minimize annual energy consumption and reduce carbon emissions by switching off the compressors when outdoor temperatures fall.

Integrated High-Efficiency Free Cooling

When the outdoor temperature falls below the required chilled-water temperature, the system automatically switches off the compressors and provides cooling entirely through outdoor air. This integrated free cooling technology minimizes energy consumption and delivers high efficiency, particularly during winter and transitional seasons.

High Free Cooling Efficiency

Maximizes energy savings by providing compressor-free cooling at low outdoor temperatures.

Advanced Scroll Technology

Optimized scroll compressors and electronic expansion valves provide efficient operation and precise temperature control, even at partial loads.

Continuous Operation

Operates at full capacity in demanding outdoor conditions up to 50°C, providing continuous cooling for critical systems.

Ideal Applications

Continuous Cooling for Medium-Sized and Critical Facilities

Liebert HPC-S is designed for medium-sized data centers, edge computing applications and temperature-sensitive industrial facilities.

Its integrated free cooling technology uses outdoor air for compressor-free cooling throughout much of the year, helping minimize energy costs. Its advanced scroll compressor architecture provides continuous and efficient cooling for critical loads, even under demanding environmental conditions.

Recommended Applications

  • Medium-sized data centers
  • Edge computing applications
  • Enterprise server rooms
  • Telecommunications and network systems
  • Banking, financial services and insurance facilities
  • Healthcare and medical imaging centers
  • Industrial manufacturing facilities

Three Cooling Modes for Maximum Efficiency

Intelligent Free Cooling Management for Maximum Savings

Liebert HPC-S uses advanced control algorithms to continuously analyze outdoor temperature and system load.

By switching off the compressors and using only outdoor air for free cooling during much of the year, it can reduce energy consumption by up to 90%.

  • Full Free Cooling Mode: At low outdoor temperatures, the compressors are switched off and cooling is provided only by energy-efficient fans.
  • Hybrid Mode: During transitional seasons, outdoor air supports cooling while the compressors operate at partial capacity to provide the remaining cooling demand.
  • Mechanical Mode: During the hottest summer conditions, the compressors operate at full capacity to provide full cooling performance.

Scroll Technology and Environmentally Responsible Design

The HPC-S series is equipped with components designed to exceed conventional industrial requirements. Scroll compressor technology helps minimize operating noise and vibration while delivering high efficiency at partial loads.

  • Scroll Compressors: Their rotary operating principle provides quieter operation, lower vibration and longer system life compared with reciprocating compressors.
  • R454B Refrigerant: A next-generation refrigerant with low Global Warming Potential supports compliance with environmental regulations and long-term system planning.
  • Vertiv™ iCOM™ Control: Manages the entire system through a 10-inch touchscreen and automatically activates backup compressors in the event of a fault.

Critical Systems, Engineered for What’s Next


Let us evaluate your requirements and design the right scalable, secure and efficient system architecture.