13VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Liebert
®
EFC is equipped with a rack with several nozzles, placed at the exit of the heat exchanger, on the process air side. These racks
evaporated is collected on the unit basin and then recirculated: considering during water recirculation the minerals concentration increase,
there is a limit on maximum number of recirculation cycles (see table 3.2) and the conductivity value is used as indicator of potential
new water is feed into the unit. This is to avoid scaling grow up, that would means heat exchanger clogging and environment of bacterial
proliferation, and pH increase, that would be dangerous for heat exchanger corrosion risk.
The evaporative cooling system is comprised of (see enclosure C):
• Submersible pump, that is able to provide water to the rack at a maximum pressure of 3 bar;
• One rack with several nozzles used to spray water on the surface of the heat exchanger;
• Droplet separator;
•
• Flow switches;
• Level switch to control water level;
• Conductivity sensor, to measure water conductivity;
• Feeding ball valve;
• Discharge ball valve;
•
• Flow meter;
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