Product Model

DA165, 165kW

The Liebert DSE is the industry's first pumped refrigeant 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.

Best Suited For:
  • Government
  • Banking, Financial and Insurance
  • Broadcast and Entertainment
  • Data Center/Colocation/Hosting
  • Professional Services
  • Telecom
Warranty: One Year Limited Warranty Against Defects in Material and Workmanship


Minimizes compressor use to maximize free cooling
Eliminates need for bringing outside air and contanimants into the data center
Eliminates water usage, no costly water treatment required
Auto-economization increases the number of free-cooling hours throughout the year
No dampers and louvers to maintain
Industry-best condenser efficiency
N+1 thermal redundancy
Capacity can easily be scaled without affecting the rest of the cooling infrastructure, while maintaining desired redundancy
Lower refrigerant charge than traditional DX systems


Pumped Refrigerant Economizer
Advanced Thermal Controls
Microchannel Condenser
Independent Thermal System Design
 50-250kW capacities
 Upflow and downflow configurations (50kW unit with downflow only)

The Liebert DSE Freecooling Solution provides high efficiency, water-free economization, maximum reliability, low maintenance and rapid scalability – all in highly flexible split-system configurations. Its pumped refrigerant economizer captures the most economization hours across the widest range of temperatures, compared to other similar systems. The Liebert DSE packaged solution uses proven pumped refrigerant economizer technology that is deployed in more than 6,000 sites around the world. With a highly flexible design, the solution is available in configurations from 50kW to 250kW. 60kW, 400kW and 500kW capacities. Highly Flexible. The system provides split-system refrigerant economization with more than two dozens configurations for airflow, form factor and capacity. It can be deployed in perimeter, gallery and full-face discharge applications for raised floor and non-raised floor data centers. No Outside Air. The system’s pumped refrigerant technology separates outside air from data center air to eliminate cross-contamination or humidity transfer. Finely Tuned Controls. The system’s industry-leading Liebert iCOM controls capture every available economization hour, with smooth, automated transitions. Advanced protection routines keep the system operating safely within thresholds. Automatic, multi-unit teamwork modes harmonize thermal management across the data center. Optimization routines reduce energy usage by up to 50% over previous versions. Onboard protocols make integration with building management systems easy. Easy Servicing. The Liebert DSE has fewer moving parts than other economizer systems, reducing the likelihood of component downtime and maintenance. All components can be serviced from the back of the unit, allowing for more flexible installation options.

Air-cooled free-cooling system with water-free economization, a rapidly deployable configuration and advanced Liebert iCOM thermal controls to optimize each unit and harmonize the operation of multiple units for temperature and airflow. Highly scalable and modular design accommodates changing IT loads and is ideal for upgrading outdated or inefficient cooling systems.

DA165, 165kW
Product Specifications
602 [177]
566 [166]
20,000 (24,000 optional)
Total Capacity
617.5 [181]
Airflow Direction
Upflow and Downflow
Heat Rejection Medium
Capacity Modulation
Variable Speed EC Fans
Controls & Monitoring
Liebert iCOM Unit Control
Tools & Selectors
Select, compare, or configure thermal management systems
Tour the Liebert DSE
Learn about the DSE features, capabilities, and benefits.

Find Your Area Contact

Products Support Contacts

Showing contacts for USA 20149 Change
Vertiv (Liebert Services)
610 Executive Campus Drive Westerville Ohio 43082 USA
Product areas of focus: Uninterruptible Power Supplies (UPS), Power Distribution, Thermal Management, Integrated Solutions, Racks and Containment

Language & Location