3VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
Liebert
®
The Liebert
®
EFC standard unit is provided with EC fans (4) that
push the data center air and pull the outdoor air through an air-to-
air composite heat exchanger (), where the outdoor air absorbs
heat from the data center air. The Data Center air passes through
1) and the heat exchanger () where it cools down.
1) and through the heat
exchanger () where it absorbs heat from the Data Center air. If
required, the evaporative system, composed of sprinklers (2),
pumps () and droplet separator (6), cools down the outdoor air
as it passes through the heat exchanger (), increasing thus its
capacity to extract heat from the Data Center air.
In climates featuring high levels of humidity the unit requires the
integration of a (DX) System or the installation
of a (CW) Coil.
When the unit is equipped with a DX backup system the Data
Center air passes, after it exits the air-to-air heat exchanger (),
through an evaporator (7) which cools down the air to the desired
temperature. The other main components of the DX system are: the
condenser (8) mounted at the exit of the heat exchanger () on the
outdoor air side, the digital scroll compressor (9), the liquid receiver
(10), the safety valve and the thermostatic expansion valve (11).
To data
center
External
air in
External
air out
From data
center
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