LIEBERT® ECONOPHASE™ Pumped

Highly Efficient, -Free BENEFITS Economization

High Efficiency The Liebert® EconoPhase Pumped Refrigerant Economizer has changed the Annual Energy Usage yyActive refrigerant economizer face of data center cooling by providing high efficiency without using water. The 1.5MW IT Load provides more hours of annual 450 than passive first pumped refrigerant economizer for 400 data centers, this innovative technology is thermosyphon systems 350 installed in more than 6000 locations 300 60% yy Pumps use less than one-tenth worldwide. It offers significant advantages 250 SAVINGS over passive thermosiphon systems. 200 the energy as 150 CRAC The economizer is a critical part of the 100 Liebert DSE system, working with the 50 yy Refrigerant carries 2 times twice Cost ($1000’s) Annual Utility 0 indoor and Liebert MC or DX with Liebert DSE as much as water and 40 MCV Outdoor Condensers to significantly Water-Side with Air-Side with times as much heat as air improve data center efficiency —without Economizer Economizer EconoPhase Liebert DSE with Cooling PUE bringing in outside air and without EconoPhase Pumped yy Instant changeover to using water. Refrigerant Economizer 1.3 - 1.05 economizer mode, even for short periods How It Works Greater Protection Liebert EconoPhase™ operates as part of the Liebert DSE™ Free-Cooling yy No outside air contamination, Economization Solution to reduce energy and no dampers or usage. All of the system's main to maintain components - compressors, condenser fans, CRAC fans and refrigerant yyAutomatic failure diagnostics; pumps - are coordinated by its Liebert pump unit serviceable without iCOM™ controls. The controls loss of cooling automatically transition the system Cutaway view of between full economization, partial EconoPhase pumps Low Maintenance economization and full and piping phases, based on IT loads, return air yy Virtually maintenance-free, with temperatures and outdoor temperatures, no moving parts except the maximizing the use of available sealed pumps economization hours. Easy to Install In cold temperatures, iCOM deactivates the compressors and activates the yy Can be installed as a unit or as economizer pumps which move part of a bundle with the Liebert refrigerant at a fraction of the energy MC or MCV usage. During the hottest temperatures, compressors are activated, bypassing the yyAllows for greater line lengths economizer pumps. In moderate than passive thermosiphon temperatures - fall, spring or even during systems (up to 300 ft) the night - iCOM may activate one compressor and one refrigerant pump to gain partial economization and energy savings.

1 LIEBERT® ECONOPHASE™

COMPARING HEAT REJECTION EFFICIENCES Refrigerant v Air Refrigerant v Water

Heat Density of Fluid 6931 btu/ft3 v 0.5 btu/ft3 6831 btu/ft3 v 3445 btu/ft3

Heat Removal Coefficient Performance (COP) 1188 kW/kW v 29.5 kW/kW 1188 kW/kW v 591 kW/kW Increase in Heat Removal Efficiency Compared to Air +4023% +2000 %

Refrigerant carries 2 times as much heat as water and 40 times as much heat as air.

Liebert DSE Pumped Refrigerant Economization By City

Chicago Dallas Full compressor 14% Full compressor 37% Full Economization Partial 43% Economization 17%

Full Economization 69%

Partial Economization 20%

San Jose Ashburn, VA

Full compressor Full compressor 12% 22%

Partial Economization Full 22% Partial Economization Economization 59% 19%

Full Economization 66%

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SL-18921 (R02/19) 2