The Vertiv™ CoolPhase Perimeter free cooling system, the next generation of the Liebert® DSE, provides high efficiency, economization, maximum reliability, low maintenance and rapid scalability – all in highly flexible split-system configurations ranging from 50kW to 265kW. The pumped refrigerant economizer captures the most economization hours across the widest range of temperatures, compared to other similar systems. The system provides split-system refrigerant economization with more than two dozens configurations for airflow, form factor and capacity, and now comes with low GWP refrigerant options. It can be deployed in perimeter, gallery and full-face discharge applications for raised floor and non-raised floor data centers. The system’s pumped refrigerant technology separates outside air from data center air to eliminate cross-contamination or humidity transfer. The system’s industry-leading 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. The Vertiv™ CoolPhase Perimeter 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.