Liebert DSE​ Free Cooling System, 50-265kW

Liebert DSE​ Free Cooling SystemThe Vertiv Liebert DSE​ Free Cooling System, 50-265kW is the industry’s first pumped refrigerant economization system designed specifically for data centers. Ideal for companies seeking sustainable solutions, it provides up to 50% higher efficiency than traditional systems – and it uses no water. Its advanced controls automate economization to get the most free cooling in any environment.

The Liebert DSE is a free cooling economization system with backup DX compressor, that achieves the industry’s highest efficiency operation – up to 50% more efficient than legacy technologies. The Liebert DSE system is approved by the State of California as a prescriptive option for economization to be used to comply with Title 24, Part 6.

The DSE system includes several components – a pumped refrigerant economizer, a micro-channel condenser and an indoor CRAC unit. It operates in free cooling or partial free cooling mode, depending upon outdoor temperatures. When criteria for economization are met, the compressors turn off and the refrigerant pump turns on to move the refrigerant through the system to reject the heat of the data center, using only a fraction of the power of a compressor and eliminates the use of water. In contrast, a cooling system with a water economizer uses an average of 4 million gallons of water per year for a data center with an IT load of 1MW.

Additionally, the Liebert DSE system protects against outside air contamination and reduces system wear and tear by eliminating air dampers and louvers. As a self-contained solution, Liebert DSE system is highly scalable. It also offers higher reliability than chilled water systems, because it does not use chillers, pumps, piping and other potential points of failure.

Liebert DSE​ Free Cooling System Features

  • Highly efficient, with PUEs under 1.20
  • Low total cost of ownership
  • Maximum economization hours across the widest temperature range
  • Elimination of outside air contamination
  • Smooth transitions between economization phases

Liebert DSE​ Free Cooling System Specifications

ModelsTotal Nominal Capacity kBtuh[kW]Net Sensible Capacity
kBtuh [kW]
Nominal Airflow [CFM]Height (in)Width (in)Depth (in)Weight (lbs)
DA050, 50kW170.6 [50.0]184.2 [54.0]70007677351590
DA080, 80kW272.9 [80.0]287.0 [84.0]960076100352200
DA085, 85kW290 [85]321 [94]10,40076100352250
DA125, 125kW426.5 [125]499 [146]18,00094144473465
DA150, 150kW511.8 [150]581 [170]18,000 (24,000 optional)94144473574
DA165, 165kW563 [165]617.5 [181]20,000 (24,000 optional)94144473574
DA250, 228kW253 [228]253 [228] 36,500132 1/8120 1/8 83 1/26285
DA265, 265kW905 [265]905 [265]36,500134 1/8120 83 1/26455

For more information about Vertiv Liebert Cooling solutions,
call 800-876-9373 or email [email protected].