Advanced controls used in the Liebert DSE continually modulate economization based on outdoor ambient temperatures, resulting in maximum free-cooling hours.

Full Compressor:
During warm temperatures, the units variable-speed evaporator fans, variable speed condenser fans, and digital scroll compressors automatically adjust to match IT load and optimize energy usage.

Partial Economization:
During cooler temperatures seasonally or overnight, the refrigerant economizer bypasses one of the unit's compressors, to provide partial free cooling, offsetting some of the compressor power usage.

Full Economization:
During cold temperatures, all of the unit's compressors are idled and bypassed by the economizer pump, saving considerable energy.