Liebert DSE Packaged Free-Cooling Solution, 400-500kW Rooftop Configuration


  • High capacity 400kW – 500kW
  • Highly efficient pumped refrigerant economizer
  • Advanced monitoring and control
  • Large condenser surface area to minimize operating and peak power
  • No dampers to service or outside air filters to replace
  • All components can be serviced from the end of the unit
  • Thermal break construction keeps air from leaking
  • 3 airflow configurations
  • Perimeter or rooftopdeployments
  • Reduced weight and footprint


Saves Money
  • High-efficiency, with an operational PUE under 1.2•High-efficiency, with an operational PUE under 1.2
  • Eliminates water usage, cost and treatment
  • Low maximum kW to allow downsizing of backup generator capacity or more IT power for sale
  • No air leakage or volumetric displacement, eliminating the need for additional fan power or make-up air capacity
  • Highly efficient in low load / part load conditions Makes You Money
  • Rapidly scalable for faster deployment and time to market
  • Low operating costs for higher profitabilityLowers Your Risks
  • Proven pumped refrigerant economization technology used in more than 4,000 installations worldwide
  • Multiple fans, DX circuits and other key components for ride-through
  • Simplifies Thermal Management
  • Advanced controls that automatically manage unit lead/lag, protect against coil freeze, maximize economization and other routine

Brochures and Data Sheets

Specification Documentation