Emerson 80-150kW Livre blanc Page 1

A Product Brief from the Experts in Business-Critical Continuity™Liebert® DSE™ with EconoPhase™: Highest Efciency DX Cooling with pumped refrigerant

return air temperatures of 85°F, 100 percent economization is achieved at an outdoor ambient temperature of 50°F. Increasing the return air to 105°F a

Regardless of the system used, an intelligent control system that evaluates room load, room temperature (or supply air temperature) and outdoor temper

While every precaution has been taken to ensure accuracy and completeness in this literature, Liebert Corporation assumes no responsibility, and discl

Introducing the Liebert® DSE™ from Emerson Network PowerIn today’s data center, minimizing annual energy usage while maintaining reliability is increa

Indoor CRAC Unit Designed with State-of-the-art TechnologiesThe Liebert® DSE™ indoor unit (DA080, DA085, DA125 or DA150) is equipped with several hig

The Liebert® MC™ condenser offers other benets beyond the intrinsic efciency gains.The micro-channel coil design eliminates the need for copper/alu

Liebert® iCOM™ Controls: The Industry’s Most Advanced Control SystemThe Liebert DSE™ is managed by the latest Liebert iCOM intelligent controls, which

between mechanical cooling and economizer cooling several times during the year. Instead, they may elect to change to economizer mode only when the sy

Figure 3: Nighttime and Cooler Ambient Temperatures: Mixed-Mode Operation The refrigerant bypasses the CRAC’s rst compressor, allowing it to idle.

Cold-Weather Operation: Pumped Refrigerant Economization with Compressor BypassFinally, as shown in Figure 4, when outdoor temperatures are at their

30%40%50%60%70%80%90%110%100%120%0 10 20 3040 50 60 70 80 90 100Outdoor Ambient °FDSE System Load (%)Model DA12575°F Return85°F Return95°F Return105°F