Emerson Liebert DS 28-105kW Brochures and Data Sheets

Liebert® DS

Designed To A Higher Standard Of Performance And Reliability

™

Emerson Network Power Understands The Need For
Precision And Reliability...
And Why This Is So Important To You

For sensitive electronics, environmental
control is more than simple cooling.
“Comfort” air conditioning systems are
designed to cool people and office space.
They simply cannot provide the kind of
environment required by high performance
computer or communication equipment.

Why You Can’t Take Chances When
Cooling Your Critical Space

Standard building cooling systems are designed
to keep people comfortable 8-12 hours each
day from spring to autumn with no provision
for winter operation. A precision cooling system
is designed to operate over a wide range of
ambient temperatures from as low as -30°F
(-34.4°C) up to 120°F (48.9°C).

Sensitive electronics must be maintained in a
stable environment of 64.4°F to 80.6°F (18°C to
27°C) with moisture between 41.9°F (5.5°C) dew
point and 60% relative humidity with 59°F (15°C)
dew point. Computers and communications
equipment generate six to ten times the

heat density of normal of ce space, the air

conditioning system must have more than just
enough cooling capacity.

Liebert DS Is Ideally Suited For:

Data Centers

Computer Rooms

Network Operations

Telecom/CATV

Labs And Testing

Production Facilities

Centers

A Tradition Of Reliability You Can Count On

Liebert Precision Cooling equipment is the
standard by which all others are judged.

The number of units that are in the  eld

far exceeds the combined number of all
other brands. Nine out of ten Fortune 500
Companies use Liebert cooling systems.

Liebert Precision Cooling Systems are used
in the most demanding, critical applications
in the world. From banking to government
to corporate computer and communications
centers, when it has to be the best—this is
the brand of choice.

It must have the precision to react quickly to
a drastic change in heat load and prevent wide
temperature fluctuations—something a large
building HVAC system cannot do.

Liebert® DS TM delivers Ef ciency Without Compromise

TM

Efficiency Without Compromise provides a path to optimize data center infrastructure around design, operating and
management efficiencies – while maintaining or improving availability. This is achieved through the proper selection and
utilization of cooling, power and monitoring technologies, supported by key services and local expertise.

INFRASTRUCTURE
MANAGEMENT

Improving performance
of the IT infrastructure
and environment

ECO AVAILABILITY

Balancing high levels of
availability and efficiency

FLEX CAPACITY

Adapting to IT changes for
continuous optimization
and design flexibility

HIGH DENSITY

Delivering architectures
from 10–60 kW/Rack to
minimize space and cost

2

The Liebert® DS™ is Designed and Built
Like No Other

Why You Should Specify Liebert DS Over
Competitive Precision Systems

Proper protection of critical facilities takes more than
bolting together pre-engineered computer room cooling
modules. In many cases, your critical systems are only
as reliable as the support equipment protecting them.
Compromising on a less capable precision cooling system
can compromise your operations. Your critical operations
demand support equipment that can provide the highest
level of reliability.

Engineering Excellence Goes Into Every Liebert DS

The Liebert DS is based on the proven design and
technology of Liebert Deluxe Systems used in thousands of
critical data centers around the world since 1965. Full scale
analysis and evaluation of the Liebert DS during all phases
of development and production is your assurance of the
most advanced performance and highest quality. Units are
thoroughly tested under a wide variety of temperature and
humidity conditions.

Reliability:

The Liebert DS is designed with the highest quality

components selected for their proven reliability and
performance.

Microprocessor technology adds automatic sequencing

of components to even wear and extend service life.

An alarm system and self-diagnostics provide rapid

troubleshooting and can prevent a problem before it
affects the electronic equipment room environment.

Air delivery system designed for optimized air

distribution and long service life.

Corrosion resistant frame and cabinet.

Flexibility:

Available in both downow and upow congurations

to cover a wide range of room applications.

Choice of compressors to match performance and

energy efciency requirements.Front access provides
easy serviceability and saves valuable oor space.

Modular frame construction allows even more exibility

in meeting specic needs for installation—frame can be
eld-separated into three sections.

Built-in humidity control and reheat function.

Liebert iCOM control system brings high-level

supervision to multiple units allowing them to
work together as a single system to optimize room
performance.

R-407C environmentally friendly refrigerant.

Low Total Cost Of Ownership:

Energy efciency options and congurations can save

money and even pay back part of your investment over
the life of the product.

Built for serviceability, with many components—such as

the Paradenser™ cleanable condenser—designed to be
maintained rather than replaced.

Specically designed for the demanding requirements

of year-round operation, the Liebert DS is actually
less expensive to operate over its life cycle compared
to both comfort cooling equipment and competitive
precision air conditioning products.

3

Engineered For Precision, Efciency And Strength

The Liebert® DS™ is designed to fit room applications
requiring high level precision control of the room
environment, including temperature, humidity,
filtration and airflow.

Precise Temperature And Humidity Control

The environmental control system must be able to sense

and react to temperature and humidity uctuations far too

small for building HVAC systems to control. The Liebert
DS is capable of control to within ±1°F (°C) and ±1% RH. By
analyzing the rate of change in temperature or the moisture
content in the environment, the control system anticipates
what is going to happen in the room, not simply responding
to what has happened.

Designed For Energy Efficiency

Liebert DS provides maximum energy efciency

without compromising the accuracy and reliability
demanded by sensitive electronics. All enhancements

to energy efciency are designed to reduce operating

time of key components and increase the Mean
Time Between Failure. This is accomplished by
taking advantage of alternate sources of cooling by
minimizing compressor operation when heat loads in
the conditioned space are lower. Energy savings is also

gained through the use of high efciency components

such as advanced digital scroll and 4-step semi­hermetic compressors.

Quality, Rugged Construction

The durable design of the Liebert DS provides a stable,
virtually vibrationless platform for compressor and fan
operation:

Autophoretic

corrosion for years of reliable service.

Welded frame—14 gauge steel provides rugged

construction, proven to withstand shipping and
handling through ISTA (International Safe Transit

Association) certied ship testing.

®

frame coating—protects frame against

Durable powder coated exterior panels—look good

and stay that way.

Slot and tab sheet metal—for consistent, quality

construction.

Optional double-skin panels—eliminate insulation in

the air stream. This allows for easy panel cleaning.

Optional floorstands—Adjustable standard and

seismic-rated oorstands allow for installation and

connection of the system prior to the installation of

the raised oor. Available in heights from 6” to 36”, a
eld installed turning vane may be specied.

4

Front Access And Serviceability Save
Valuable Floor Space

Total front access provides space and

serviceability bene ts not found on

previous models or competitive units.

The Liebert

®

DS™ can be placed
adjacent to or in back of other
equipment or against a wall or
partition.

All key components are visible and
accessible—from the front of the unit
for easy maintenance and removal.

Compressors are removable from
front—isolated from air stream for
easier maintenance.

Modular Frame Construction

The unit’s modular frame
construction allows even more

 exibility in meeting speci c needs
for installation, energy ef ciency and

other special requirements.

The frame can be  eld-separated into

three sections—enabling the unit to

 t into small elevators or through

other tight spaces.

5

Flexible Cooling Congurations

The Liebert® DS™ provides a complete environmental
control package, including both precision air

conditioning as well as humidity control. Both upow
and downow congurations are available to cover
raised oor and non-raised applications.

The Liebert DS product line has been designed
to cover the widest possible range of application

requirements. These include choice of airow
conguration, cooling method options and many

other selections that will create the most effective and

efcient system for your facility.

Liebert DS Units Can Be Configured For Optimum
Cooling Of Any Type Of Space

Downflow congurations are designed for use in raised

oor applications such as data centers and other

facilities housing sensitive electronic equipment.

The Liebert DS downow conguration combines

top air return with bottom air supply to circulate air

underneath the oor.

Liebert DS Downflow

Upflow units can be specied in situations where

the oors are not raised, such as communications

facilities, industrial control rooms and laboratories.
These units can supply air directly into the room or be
connected to distribution ductwork.

Compressorized Systems Offer Flexibility,
Efficiency, Reliability

Long recognized as the standard in environmental
control systems for data center operations, Liebert
DS compressorized systems are built to the highest

specications in the industry with proven components

and design. They feature direct expansion operation in

four types of cooling congurations: air cooled, water

cooled, glycol cooled and our exclusive GLYCOOL free­cooling option.

Liebert DS Upflow

6

The Widest Variety Of Air Supply Choices

Downflow Supply

Designed for raised- oor applications, the down ow

air supply con guration is commonly found in data

centers and other similar facilities housing sensitive
electronic equipment.

Top Front Supply with Plenum & Grille

and Front Return

In-the-space applications without ductwork, such as

Telecommunications, Networks and Switching Centers,

bene t from this economical con guration. Optional high
 ltration may be desirable.

Top Front Supply and Front Return

Engineered for in-the-space applications utilizing

duct work, this air ow design is commonly used for

Telecommunications or Industrial applications. High

static pressure and  ltering options may be selected.

Top Rear Supply and Rear Return

Designed for use in out-of-space applications, this

con guration is typical for Industrial Processes such as

Control Rooms, and Labs. Many of these sites will select a

higher static pressure and optional high ef ciency  lters.

(Customer ducted supply and return)

7

Air Delivery System Designed For Optimized Air
Distribution And Long Service Life

Constant delivery of

full air ow to keep

delivering cold air
when needed.

Flexibility for high

 ltration or external

static pressures up to

2.5”(625 Pa).

5-YEAR WARRANTY
on drive components
(bearings, belts, shaft,
pulleys).

Centrifugal blowers
enable performance
over a wide range of
air volume and static
pressure ranges.

Pillow block fan
bearing with
minimum L3 life of
200,000 hours.

Static regain duct

improves under oor air

distribution.

Pentadrive™ Blower - Special 5-year Liebert Belt.
Automatic self-tensioning motor base increases
belt life and reliability of shaft and bearings.

Computers and other sensitive electronics require greater
air volumes than comfort air conditioning can provide. The
high density heat load in the relatively small space of a data
center requires more air changes to remove heat properly.
A key to the outstanding performance of the Liebert® DS™ is
its optimized air delivery design. It combines high efficiency
and effective air handling to deliver reliable, constant cooling
under the most demanding conditions.

High ef ciency motor

meets NEMA Premium
motor standard.

Pentadrive™ Blower System

Large capacity fans are dynamically balanced
to minimize vibration and provide even air
distribution. The low velocity fans use less fan
motor energy and operate more quietly than
forced air blowers. Filtered air at the right
temperature and humidity is fed positively and
evenly into the room.

Motors

The Liebert DS features fan motors that are optimized for reliability and energy ef ciency.

High-efficiency open drip-proof motor meets National Electrical Manufacturers Association (NEMA) Premium

motor standard.

Motor Options

Optional TEFC (Totally Enclosed Fan-Cooled) motors—for rugged industrial environments.

Optional larger horsepower motors available—for higher air volume or higher static pressures.

8