Specifications

Economical Chilled Water Systems
Liebert CW
™
Chilled Water Cooled Precision Air Conditioning For Data Centers
EC Plug Fans in underfloor configuration
(available on all Liebert CW downflow models)
EC Plug Fans in-unit configuration
(available on all Liebert CW downflow models)
By taking advantage of your existing central air conditioning
chiller, the Liebert CW provides thrifty, durable cooling and
humidity control around the clock, throughout the year.
The Liebert CW chilled water system offers rugged, yet
affordable cooling and humidity control where a central
water chiller is available as a year-round cooling source.
In these applications, a single chiller can be used for
multiple air conditioning units, providing savings on
additional heat rejection components.
The full line of Liebert chilled water systems use Liebert
iCOM microprocessor-based controls to maintain
precise temperature and humidity levels, while the
cooling hardware is designed and built for continuous,
trouble-free operation.
More Cooling Capacities
Available in ten cooling capacities, with either upflow
or downflow configurations.
Chilled Water Control Valve
The chilled water valve provides proportional control
action in response to room temperature and humidity
as sensed by the microprocessor control. It includes
operating linkage and electronic motor. Unlike other
systems of this nature it requires no over-travel linkage
or end switches to be adjusted. The control uses
“intelligent logic” to eliminate valve hunting, thus
greatly increasing the life of the valve. The valve can be
a 3-way or 2-way to meet the appropriate requirements
of the installed system.
Economizer operation
For economical, free-cooling operation, Liebert CW is
compatible with the Liebert Air Economizer solution,
and also works with Chiller Plant Series Economizer
applications. Economizers can reduce operating costs
by up to 50%, based on regional ambient conditions.
All Liebert CW Downflow Models Are Now Available With
Energy Efficient EC Plug Fans.
The energy saving capabilities
of the Liebert CW with EC Plug
Fans or variable speed drive
fans result in a quick payback
through lower electricity costs.
21
Premium efficiency centrifugal fans,
and optional Variable Speed Drive fan
motors, are available on all models
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