Brochures and Data Sheets

Liebert DS
™
The World Standard For Protecting Critical Environments
21
Liebert iCOM Control System
The Liebert iCOM control system featured on
the Liebert DS brings high-level supervision to
multiple units, allowing them to work together
as a single system to optimize room performance.
The Liebert iCOM control system offers a variety
of advantages:
Saves Energy using Predictive Humidity Control.
Built-in Lead/Lag Functions for enhanced
system reliability.
Wellness Calculation alerts service personnel
before problems occur.
Unit-to-Unit Communications allows Lead/Lag
and optional teamwork settings for maximum
flexibility of control.
Removable display makes troubleshooting easier.
Monitors all key system functions and
reports to alarm, if needed.
The standard Small Graphic Display features a
128 x 64 dot matrix backlit screen. Advanced
monitoring can be achieved with the addition
of the Optional Wall Mounted Display.
A Choice Of Compressors Offers
Higher Efficiency, Adaptability And
Reliable Operation
Only Liebert offers you a choice of energy efficient compressor systems
to suit your specific application and budget requirements.
U2U Configuration 2
Liebert DS units with Small Graphic Display may
be centrally monitored and controlled with the
Optional Wall Mounted Display.
Now Available With Energy Efficient
EC Plug Fans
Liebert DS downflow models
are now available with ener-
gy efficient EC Plug Fans. In
fact, many utility companies
offer a rebate for using this
energy efficient option —
check with your local utility
for details.
The Liebert DS with EC Plug
Fans delivers energy efficien-
cy gains via the fan system. These electrically commutated fans are a back-
ward curved motorized impeller powered by a direct drive DC Motor with
integrated AC-DC conversion. This design uses less energy than standard
centrifugal blowers by lowering motor kW. The EC Plug Fan uses 10-30%
less energy on average than standard AC motors.
The EC Plug Fan is located in the area beneath the raised floor or within the
unit. Superior energy savings can be realized with the fans located beneath
the raised floor. Placing the fan in the raised floor space, is 30 percent more
energy efficient than centrifugal blowers. The EC Plug Fan also provides
greater energy savings than variable speed drives.
The Standard Scroll Compressor:
Rugged, Quiet,Efficient
The standard scroll compressor offers efficient, reliable
performance with a robust design that contains only
a few moving parts. Quiet operation is accomplished
through a continual, smooth compression process.
Discharge gas and vibration are kept at a low level.
Optional Energy Saving Variable
Speed Drive Fan Motor
Liebert DS models using digital Scroll compressors are
also available with an optional variable speed drive on
the fan motor used to drive centrifugal blowers. This
feature matches the motor speed to the room cooling
requirements, allowing the unit to use far less motor
energy to move room air. This drive is controlled by the
Liebert iCOM control system to match the speed of the
blower with the load in the room. This option eliminates
excessive energy use due to an oversized design or
changing room conditions.