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Precision Cooling for
                                   Business-Critical Continuity




Designed To A Higher Standard
Of Performance And Reliability
Liebert DS ™ 50 HzDownflow Model
LIEBERT UNDERSTANDS THE NEED
                        FOR PRECISION AND RELIABILITY…
                        AND WHY THIS IS SO IMPORTANT TO YOU



                        For sensitive electronics, environmental control is more than                                           We Have The Right Solution For Your
                        simple cooling. “Comfort” air conditioning systems are                                                  Specific Application
                                                                                                                                    Liebert has identified a number of distinct zones or areas of
                        designed to cool people and office space. They simply cannot
2                                                                                                                               application, found within many business-critical applications,
                        provide the kind of environment required by high                                                        which have a requirement for mission-critical cooling
                        performance computer or communication equipment.                                                        technologies. Each zone has similarities but with different
                                                                                                                                needs for infrastructure protection — all of which can be met
                                                                                                                                by Liebert solutions.
                        Why You Can’t Take Chances
                                                                                                                                Specific zones where the Liebert DS can be used include:
                        When Cooling Your Critical Space
                                                                                                                                I   Data Centers                        I   Telecom/CATV
                          Standard building cooling systems are designed to keep
                                                                                                                                I   Computer Rooms                      I   Labs And Testing
                        people comfortable 8-12 hours each day, five days a week
                                                                                                                                I   Network Operations Centers          I   Production Facilities
                        and only during the warmest months.
                          Sensitive electronics must be maintained in a stable
                        environment of 68°F to 77°F (20°C to 25°C) with a relative
                        humidity of 40% to 55%. Because computers and
                        communications equipment generate large quantities of
                        heat in small areas, six to 10 times the heat density of
                        normal office space, the air conditioning system must                                                   A Tradition Of Reliability You Can Count On
                        have more than just enough cooling capacity. It must have                                                   Liebert Mission Critical Cooling equipment is the standard
                        the precision to react quickly to a drastic change in                                                   by which all others are judged. The number of units that are in
                        heat load and prevent wide temperature fluctuations                                                     the field far exceeds the combined number of all other brands.
                        — something a large building HVAC system cannot do.                                                     9 out of 10 Fortune 500 Companies use Liebert cooling systems.
                                                                                                                                    Liebert Mission-Critical Cooling Systems are used in the most
                                                                                                                                demanding, critical applications in the world. From banking to
                                                                                           80




                                                                                                                                government to corporate computer and communications
    The ASHRAE document, “Thermal Guidelines                                                                                    centers, when it has to be the best — this is the brand of choice.
    for Data Processing Environments,” spells out
                                                                                     75




    the temperature, dew point and humidity
                                                                                                                    ity




    specifications for electronic components
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    operating in mission-critical facilities.
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                                                                                                                                Why You Should Specify Liebert Over
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                                                                                                              ive                   Proper protection of critical facilities takes more than
                                                                                                         lat
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                                                         55                                      40
                                                                                                    %
                                                                                                                                bolting together pre-engineered computer room cooling
                                                    50
                                                                                                                                modules. In many cases, your critical systems are only as
                              Relative Humidity




                                                                                                                                reliable as the support equipment protecting them.
                                                  60%
                                                  50%                                                  Primary precision air    Compromising on a less capable precision cooling system
                                                  40%                                                  conditioning systems     can compromise your operations. Your critical operations
                                                                                                       keep room temperature
                                                                                                       and humidity within      demand support equipment that can provide the highest
                                                                                                       this area of control.
                                                    50   55     60     65       70    75    80                                  level of reliability.
                                                         Room Temperature (°F)
THE LIEBERT DS
                                                                    IS DESIGNED
                                                                    AND BUILT LIKE
                                                                    NO OTHER


                                                                                                                   3
                                                                    Designed For Reliability
                                                                       Because electronic system availability is
                                                                    required 24 hours a day, 365 days a year,
                                                                    the environmental control system must
                                                                    meet the same demands. The Liebert DS
                                                                    is designed with the highest quality
                                                                    components selected for their proven
                                                                    reliability. 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.


                                                                    Year-Round Operation Under
                                                                    Many Climate Conditions
                                                                      Comfort conditioning systems cannot
Engineering Excellence Goes                                         be relied upon 24 hours per day 365 days
Into Every Liebert DS                                               per year. They are typically designed to
  The Liebert DS is based on the proven design and                  operate 10 hours per day, from spring to
                                                                    autumn. Many comfort systems have no
technology of Liebert Deluxe Systems used in thousands              provision for winter operation. A precision
of critical data centers around the world since 1965.               environmental control system is designed
                                                                    to operate over a wide range of ambient
  Full scale analysis and evaluation of the Liebert DS during all   temperatures from as low as –30°F
phases of development and production is your assurance of           (-34.4°C) up to 120°F (48.9°C).
the most advanced performance and highest quality. Units are
thoroughly tested under a wide variety of temperature and           Precise Temperature And
humidity conditions.                                                Humidity Control
                                                                      The environmental control system
                                                                    must be able to sense and react to
                                                                    temperature and humidity fluctuations
                                                                    far too small for building HVAC systems
                                                                    to control. The Liebert DS is capable of
                                                                    responding to changes as small as
                                                                    ±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 respond to what has happened.
ENGINEERED FOR STRENGTH
    AND APPLICATION FLEXIBILITY




    The Liebert DS is designed to fit room applications requiring   Downflow Configurations
4                                                                     Designed for use in raised floor applications, such as data
    high level precision control of room environment, including
                                                                    centers, the Liebert DS downflow configuration combines
    temperature, humidity, filtration and airflow.
                                                                    top air return with bottom air supply to circulate air
                                                                    underneath the floor.
    Designed For Energy Efficiency
      Liebert is dedicated to providing maximum energy
                                                                    Quality, Rugged Construction
    efficiency in its precision cooling systems without
                                                                      The durable design of the Liebert DS provides a stable,
    compromising the accuracy and reliability demanded by
                                                                    virtually vibrationless platform for compressor and fan
    sensitive electronics. All enhancements to energy efficiency
                                                                    operation.
    are designed to reduce operating time of key components
                                                                      Autophoretic® frame coating — protects frame against
    and increase the Mean Time Between Failure. This is
                                                                    corrosion for years of reliable service.
    accomplished by taking advantage of alternate sources
                                                                      Welded frame — 14 gauge steel provides rugged
    of cooling without being dependent on their availability
                                                                    construction, proven to withstand shipping and
    or by minimizing compressor operation when heat loads in
                                                                    handling through ISTA (International Safe Transit
    the conditioned space are lower. Energy savings is also
                                                                    Association) certified ship testing.
    gained through the use of high efficiency components
                                                                      Durable powder coated exterior panels — look
    such as advanced digital scroll and 4-step semi-hermetic
                                                                    good and stay that way.
    compressors.
                                                                      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 floorstands allow for installation and connection of the
                                                                    system prior to the installation of the raised floor. Available
                                                                    in heights from 6” to 36”. A field installed turning vane may
                                                                    be specified.
5




Front Access And Serviceability
Save Valuable Floor Space
  Total front access provides space and
serviceability benefits 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 visible and
accessible — from the front of the unit
for easy maintenance and removal.
  Compressors removable from front —
isolated from air stream for easier
maintenance.


Modular Frame
Construction
  The unit’s modular frame
construction allows even more
flexibility in meeting specific needs
for installation, energy efficiency
and other special requirements.
  Frame can be field separated into
three sections — enables unit to fit
into small elevators or through
other tight spaces.
AIR DELIVERY SYSTEM DESIGNED
                     FOR OPTIMIZED AIR DISTRIBUTION
                     AND LONG SERVICE LIFE

                                                                                                                 Centrifugal
                                                                                                                 blowers enable
                                                                                                                 performance over      High efficiency
                                                                     5-YEAR DRIVE COMPONENTS                     a wide range of air   motor meets
                                                                     (bearings, belts, shaft, pulleys)           volume and static     NEMA Premium
                                                                                                                 pressure ranges.      motor standard.

                     Computers and other sensitive electronics
6                    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.




                                                                     Constant delivery     Flexibility for       Static regain         Pillow block fan
                                                                     of full airflow to    high filtration or    duct improves         bearing with
                                                                     keep delivering       external static       underfloor air        minimum L3 life
    Special 5-year                                                   cold air whenever     pressures up          distribution.         of 200,000 hours.
    Liebert Belt                                                     needed.               to 2.5" (625 Pa).




                                                                     Pentadrive ™ Blower System
                                                                     Clean, even air distribution is supplied by large capacity
                                                                     fans, which are statically and dynamically balanced to
                      Pentadrive Blower system/belt
                                     ™                               minimize vibration. Air is drawn evenly and at low velocity
                      tensioning:                                    through the system, using less fan motor energy and
                                                                     operating more quietly than forced air blowers. Filtered air
                      I   Automatic Self-tensioning motor
                                                                     at the right temperature and humidity is fed positively and
                          base increases belt life and reliability
                                                                     evenly into the room.
                          of shaft and bearings.
                      I   Keeps constant tension on belt.
                      I   Maintains good sheave and
                          pulley alignment.
                      I   Prevents over-tightening.
                      I   Dual belts for 100% redundancy.
Electric Panel
The electric panel of the Liebert DS is
designed for easy access to critical
electrical and control components.




                                                                                                        Low voltage
Optional disconnect                                                                                     terminal strip
switch available    Location for          Solidstate contactors                                         provides
as locking or       optional secondary    for optional SCR      Contactors,         Miniature Circuit   connection            Control interface
non-locking         disconnect switch     reheat                IEC type            Breakers            flexibility           board for easy access



                                                                                                                                                      7




Unit Monitoring And Control Options
I   Dual float condensate pump — installed in unit, with secondary float to shutdown
    unit and trigger alarm if high water detected
                                                                                                        Motors
I   Optional Low Voltage Terminal Package — two extra n/o common alarm contacts,                          The Liebert DS features fan motors
    two extra remote shutdown terminals, one main fan auxilliary contact, water sensor                  that are optimized for reliability and
    signal shutsdown unit, and provides dry contact (water sensor is optional).                         energy efficiency.
I   Smoke sensor — senses the return air, shuts down the unit upon detection, and sends
                                                                                                          High efficiency open drip proof
    visual and audible alarm. Dry contacts are available for a remote customer alarm. This
                                                                                                        motor meets National Electrical
    smoke sensor is not intended to function as, or replace, any room smoke detection system
                                                                                                        Manufacturers Association (NEMA)
    that may be required by local or national codes.
I   High temperature sensor — alerts users to any high temperature situations                           Premium motor standard.
    within the system. Senses return air temperature and shuts down unit if temperature
                                                                                                         Motor Options
    exceeds 125°F (51.7°C)
                                                                                                         I   Optional TEFC (totally enclosed
I   Analog input wiring — includes four customer accessible analog inputs for
    sensors provided by others. The analog inputs accept a 4 to 20 mA signal. Gains                          fan-cooled) motors — for rugged
    Calibration for each input are programmable from the front panel.                                        industrial environments.
I   Compressor overload — activates an audible and visual alarm in the event                             I   Optional larger horsepower
    of a compressor overload.                                                                                motors available — for higher air
I   Main Fan Overload - activates an audible and visual alarm in the event of a                              volume or higher static pressures.
    motor overload.
DEPENDABLE, EFFECTIVE
        COOLING SYSTEM

        At the heart of the Liebert DS are its
        cooling system components, each
        designed to provide maximum reliability.




8
                                                                                                     Draw through design
                                                                                                     pulls air evenly
                                                                                                     through the cooling
                                                                                                     coil, reheat and
                                                                                                     humidification
                                                                                                     systems.



                                                                                                     A-frame coil design
                                                                                                     maximizes coil area
                                                                                                     reduces air velocity,
                                                                                                     lowers chance of
                                                                                                     water blowing off
                                                                                                     coil, results in far less
                                                                                                     turbulence with
                                                                                                     superior efficiencies
                                                                                                     in heat transfer.


                                                                                                     Optional polymeric
                                                                                                     coating on coils
                                                                                                     protects against
                                                                                                     corrosion due to harsh
                                                                                                     environments.




    A-frame coil                                                         Refrigeration System Features
        This Liebert designed and manufactured A-Frame coil                  Each refrigeration circuit includes:
    features a large face area/low face velocity design for precise      I   Sight glasses — serve as a means of quick visual inspection
    control of cooling and dehumidification — and is designed to             to determine if there is moisture in the system and if the
    optimize heat transfer and minimize pressure drop.                       system is properly charged.
                                                                         I   Refrigerant dehydrators — assure a moisture-free
    Dual Refrigeration Circuits For Redundancy                               refrigerant system for extended component life.
        Dual compressors and refrigeration circuits assure reliability   I   Expansion valve — externally equalized expansion
    and feature automatic sequencing for even wear of                        valves smoothly control refrigerant flow during indoor
    components.                                                              heat loads and outdoor ambients by controlling
    I   Components include — dual compressors and dual                       evaporator superheat.
        refrigeration circuits enabling the system to operate even if    I   Muffler — specially engineered mufflers afford a quiet
        one circuit fails.                                                   pulsation free refrigeration system.
    I   Pump-down evacuation of refrigerant from compressor              I   Safety controls — Each compressor has an automatic
        crankcase — shields the compressors from the "hard starts"           reset high pressure switch, that locks-out after the third
        that can shorten their life.                                         trip. A low pressure transducer protects against coil
                                                                             freezing and low refrigerant pressure.
DUAL COOLING OPTION
INCREASES ENERGY EFFICIENCY

For even greater efficiency, Liebert offers energy efficient
alternatives such as its Dual Cool option, which provide
compressorless operation, where climate permits, to
substantially reduce energy costs.



                                                                                                Dual Cooling coil
                                                                                                increases availability by                9
                                                                                                using building chilled
                                                                                                water as primary,
                                                                                                compressor as back-up.

                                                                                                Optional econo-coil
                                                                                                nested within A-frame
                                                                                                coil to minimize air
                                                                                                pressure drop
                                                                                                and increase efficiency

                                                                                                Provides redundancy
                                                                                                and energy savings
                                                                                                for increased ROI.


                                                                                                Optional 70/30 Cu/Ni
                                                                                                free-cooling coil
                                                                                                must be specified
                                                                                                to prevent tube
                                                                                                corrosion when using
                                                                                                with a cooling tower
                                                                                                loop or other open
                                                                                                water system.




                                                                     Dual Cool
                                                                       Utilizing this option, a conventional air cooled Liebert DS
                                               Modulating econo-
                                               coil valve controls   is converted to a dual source cooling system by the addition
                                               chilled water for     of a second coil that utilizes a central building chiller supply.
                                               dual-cooling
                                               systems               Using a modulating control valve and a comparative
                                                                     temperature sensor, the unit can function either as a
                                                                     chilled water system, as a compressorized system —
                                               Modulating
                                               valve— for            or a combination of both.
                                               optional dual           During times when the chiller supply is available,
                                               cooling or
                                               free-cooling coil.    compressor operation is eliminated, reducing energy costs. .
                                                                     Switchover between the two cooling modes is performed
                                                                     automatically by a microprocessor control and temperature
                                                                     sensor. In addition to energy efficiency, this option can
                                                                     provide increased redundancy and flexibility to the
                                                                     environmental control system.
CONTROLLING THE
                           CRITICAL ENVIRONMENT
                           A key to the ability of a quality
                           Mission Critical Cooling system to
                           control conditions within the critical
                           space is its high “sensible heat ratio.”
                                                                        Standard Infrared Humidifier
                                                                        Instant humidification on when
                                                                        needed, off when not needed.



10                           Unlike people, computers generate
                           dry or “sensible” heat, but not
                           humidity. With a large percentage of
                           their total capacity devoted to the
                           removal of moisture, comfort systems
                           can lower room humidity far below
                           acceptable standards for electronic
                           equipment — and they have no
                           provisions for adding moisture.
                             To correct this situation, precision air
                           conditioning systems typically have a
                           high ratio of sensible-to-total cooling
                           capacity to remove heat from the air.
                           This capability is provided through the
                           use of integrated humidification
                           systems to provide the necessary level
                           of moisture control, higher air supply
                           capacity and larger coil size.


                                                                        Humidifier make-up      Pure water vapor        Does not depend on water quality. High
                                                                        valve controls flow     provides most           intensity quartz lamps shine on water
                                                                        of water to the         effective               creating instantaneous moisture using
                                                                        humidifier pan.         humidification.         almost any water quality.



                                                                        Humidity Control
                                                                          Maintaining the correct humidity level in the room is just as important as
                                                                        maintaining proper temperature. Inadequate humidity control can cause static
                                                                        electricity if it’s too dry — or condensation that can corrode circuitry if the air is
                                                                        too moist. Comfort cooling systems can lower room humidity far below
                                                                        acceptable standards for electronic equipment — and they usually have no
     Optional Steam Generating                                          provisions for adding moisture. The Liebert DS utilizes an integrated
     Canister Humidifier                                                humidification system to provide the necessary level of moisture control.
     I   Utilizes replaceable bottle—
         requires a specific water quality                              Dehumidification Control
         level for optimum operation.                                     The compressors operate at full capacity during dehumidification. The
     I   Utilizes a drain and refill cycle—                             precision control of the Liebert DS saves energy by tightly regulating

         to maintain a current setpoint.                                compressor operation and avoiding over-dehumidification that causes the
                                                                        humidifier to come on when not needed.
Minimum Efficiency Reporting Value (MERV),
                               adopted by ASHRAE in it's 52.2 standard.




                                                                                                                                                        11

                                                                                     Filtration System
                                                                                       The Liebert DS features integral air filtration to protect
                                                                                     against airborne contaminants within the critical
                                                                                     environment. Without proper air filtration, even small
                                                                                     amounts of dust and other particles can damage storage
                                                                                     media and charged electronic components.
                                                                                     • High efficiency air-filtration — removes damaging
                                                                                       particles from air.
                                                                                     • Standard filter — 4” deep, Merv 8. (45% ASHRAE 52.1).
                                                                                     • Optional high efficiency filter — 4” deep, Merv Merv 11
                                                                                       (60-65% ASHRAE 52.1)
                                                                                     • Optional 2" Merv7 pre-filter with 2" Merv 11 filter.
                                                                                     • V bank filter arrangement — reduces air pressure
                                                                                       drop, top filter access.




Autoflush system    High water float   Bypass air slots        Cleanable stainless     Natural air-gap.
reduces build-up    switch shuts       ensure that             steel humidifier        No need for back-
mineral deposits    down humidifier    moisture can be         pan. Removable          flow prevention.
and impurities in   upon high water.   introduced into         from front.
the water pan.                         air stream.
                                                                                                             Reheat Options
                                          Reheat Function                                                    I    SCR electric reheat — For
                                              The reheat function of the Liebert DS is primarily
                                                                                                                  specialized applications requiring
                                          used to keep the temperature from going too low
                                                                                                                  tight temperature control.
                                          during the dehumidification cycle.
                                                                                                                  Multiple pulses of reheat vs. three
                                                                                                                  equal stages provide smooth
                                          Standard Reheat
                                                                                                                  temperature adjustment.
                                          I   Three-stage electric reheat — low watt-density, 304
                                                                                                             I    Optional hot water reheat —
                                              stainless-steel fin-tubular reheat, location maximizes
                                                                                                                  Uses existing building hot water,
                                              airflow to maximize element life and improve reliability.
                                                                                                                  saving energy.
                                                                                                             I    Reheat/humidifier lockout —
                                                                                                                  Reduces power requirements
                                                                                                                  during emergency power
                                                                                                                  operation.
A CHOICE OF COMPRESSORS OFFERS
     HIGHER EFFICIENCY, ADAPTABILITY
     AND RELIABLE OPERATION
     It Starts With Reliable Scroll                                 New Refrigerants To Meet Government Regulations
     Compressor Technology                                          Without the ability to utilize newer environmentally-friendly
     The scroll compressor design provides high efficiency,         refrigerants, your cooling equipment could become obsolete
     low sound levels and excellent durability. The Liebert DS      and “out of compliance.” The Montreal Protocol and EPA
     precision cooling system is available with either:             Clean Air Act require cooling equipment manufacturers to
     I   A standard fixed-capacity scroll compressor.               switch to environmentally-friendly refrigerants by 2010
     I   An optional Digital Scroll compressor with energy          I   R-407C — is Liebert’s choice for optional environmentally-
12
         saving, variable capacity operation.                           friendly refrigerant to meet future environmental
                                                                        standards. This is the best fit for Liebert applications, with
     The Standard Scroll Compressor:                                    near drop-in replacement.
     Rugged, Quiet, Efficient                                       I   R-22 — is the standard refrigerant offered in the Liebert DS
     The standard scroll compressor offers efficient, reliable      I   Field conversion — from R-22 to R-407C refrigerant is
     performance with a robust design that contains only a few          most practical for scroll compressors. Systems operating
     moving parts. Quiet operation is accomplished through              on R-22 use mineral oil, while R-407C refrigerants utilize
     a continual, smooth compression process. Discharge gas             POE (polyolester) oil. Therefore, a complete system
     and vibration are kept at a low level.                             clean-out may be required.


     The Digital Scroll Compressor: A New
     Standard For Performance and Reliability
         The exclusive digital scroll compressor option on
     the Liebert DS utilizes the latest control technology to
     deliver precise operation and significantly higher energy
     efficiency. In addition to the advantages of the dependable
     scroll design, Digital Scroll technology provides infinitely
     variable capacity modulation that enables the output to
     precisely match the changing cooling demands of the
     room. This approach is as much as 30 percent more
     efficient than traditional hot-gas bypass.
     Benefits include:
     I   Greater energy savings— variable capacity system
         allows maximum load tracking for higher efficiency.
     I   Improved reliability — by reducing compressor
         cycling and component wear.
     I   Improved Performance — the compressor can easily
         adapt to changing load conditions, providing precise
         temperature control.
Digital Scroll Compressors                                                                                                                 Cumulative Compressor Cycles
    No other precision air conditioning product line offers                                                                               As Load Grows From 50% To 100%
as many choices for energy efficiency as the Liebert DS.
The exclusive digital scroll compressor option utilizes the                                                                    60% Load         70% Load    80% Load                90% Load
                                                                                                                     140000
latest control technology to deliver significantly higher




                                                                                      Cumulative Compressor Cycles
                                                                                                                     120000                                            Single Compressor
energy efficiency.
                                                                                                                     100000
I   Variable capacity system — for maximum load tracking,                                                             80000
                                                                                                                                                                        Two Compressors         13
    reduced compressor cycling and minimized compressor wear.
                                                                                                                      60000
I   Optional crankcase heater — for quick start operation.
                                                                                                                      40000
I   Saves energy over single-stage compressors.
                                                                                                                      20000
I   Improves reliability by reducing compressor cycling.                                                                                                               Digital Compressor
                                                                                                                         0

                                                                                                                                Year 1           Year 2     Year 3                     Year 4



                                                                                                                      Increasing compressor cycling takes a toll on compressor life.
                                                                                                                      Liebert Four-Step Semi-Hermetic compressors and Digital Scroll
                                                                                                                      compressors automatically adjust to yearly increases in heat
              Digital Scroll Capacity Control Diagram                                                                 load, providing significantly greater component life than other
                                                                                                                      compressor technologies.
                                                              100%
                             7.5 secs                        capacity
                50% Load
                                                                          0%
                                        7.5 secs                        capacity

                                  15 secs
                            5 secs
                33% Load
                                    10 secs


                                 15 secs




             Digital Scroll Capacity adapts as load changes




                                                   Future Load                 100%


                           Initial Load



                10%
                                                                 Capacity

                                               Load
LIEBERT


                                                                 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.



                                                                                                                                     The standard Small
14                                                                                                                                   Graphic Display
                                                                                                                                     features a 128x64 dot
                                                                                                                                     matrix backlit screen.
                                                                                                                                     Advanced monitoring
                                                                                                                                     can be achieved with
                                                                                                                                     the addition of the
                                                                                                                                     Optional Wall
                                                                                                                                     Mounted Display.
     Removable display makes
     servicing easier.




                                         Small Graphic Display



                                                                 Intelligent Communications
     Parts list available on control
     for easier maintenance.                                     And Monitoring
                                                                 I   Saves Energy using Predictive Humidity Control.
                                                                 I   Built-in Lead/Lag Functions for enhanced
                                                                     system reliability.
                                                                 I   Wellness Calculation alerts service personnel
                                                                     before problems occur.
                                                                 I   Unit to Unit Communications allows Lead/Lag
                                                                     and optional teamwork settings for maximum
                                                                     flexibility of control.

     Monitors all key system functions
     and reports to alarm, if needed.




                                                                                                             The Optional Wall
                                                                                                             Mounted Large
                                                                                                             Graphic Display
                                                                                                             provides centralized
                                                                                                             monitoring and
     On-board Unit Diary provides a                                                                          control of connected
     maintenance history to any                                                                              Liebert DS units.
     authorized user.
Standby Settings
 (Lead/Lag Set-up)




                                              The optional Large
                                              Graphic Display features
                                              a 320x240 dot matrix
                                              backlit screen with
                                              helpful system and
                                              maintenance views.


                                                                                      Additional Views Available
                                                                                      with Large Graphic Displays                  15
                                                                                      I   System View — Allows you to see the
                                                                                          average operation of the “system” or
                                                                                          all units that are working together in
                                                                                          Unit to Unit (U2U) Communication
                                                                                          mode for Teamwork or Lead/Lag from
                                                                                          a centralized location.
                                                                                      I   Spare Parts List — Critical spare part
                                                                                          numbers are saved in unit memory
                                                                                          and may be displayed on the Large
                                                                                          Graphic Display, speeding
                                                                   Maintenance/
                                                                                          identification of parts.
Large Graphic Display                                              Wellness Set-up
                                                                                      I   Unit Diary — Free field area within
                                                                                          the unit memory where unit
                                                                                          maintenance shares history with any
                                                                                          authorized users or logged-in service
                                                                                          contacts, including record of what
                                                                                          others have done.




Spare Parts                                Unit Diary


U2U Configuration 2                                               Teamwork: Mode 2
Liebert DS units with Small Graphic Display may                   Units work together to provide precision
be centrally monitored and controlled with the                    cooling in rooms with unbalanced loads.
Optional Wall Mounted Display.
PARADENSER ™ CLEANABLE
     CONDENSER PROVIDES
     LIEBERT DS WITH LONGER
     SERVICE LIFE



     The Liebert DS mission-critical cooling system offers the new
16
     Paradenser ™ condenser for use in water/glycol systems. This
     patented component utilizes a counter-flow design and features
     a shell and tube type construction.


     I   Fully cleanable — eliminates costly condenser failures
         due to plugging and providing a longer service life.
         Large water passages prevent plugging and allow for
         conventional tube cleaning methods.
     I   Constructed of copper tubes with removable cast
         iron heads nickel plated plugs— the Paradenser can be
         mechanically cleaned from the top.
     I   Shell side of the condenser acts as a receiver — holds
         refrigerant charge during pumpdown.
     I   Works equally well with either R-407C or R-22
                                                                      Fully cleanable Paradenser
         refrigerants — Counterflow design and high refrigerant       tubes are located for
                                                                      convenient maintenance.
         velocities significantly maintain performance when
         using R-407C refrigerant.
     I   Utilizes no gaskets — offers further reliability by
         preventing leaks.
LIEBERT HEAT REJECTION SYSTEMS—
    FLEXIBLE CONFIGURATIONS TO
    MEET APPLICATION REQUIREMENTS




Liebert Condensers
    Liebert manufactures its own                                                                                                  17
high-efficiency, air cooled condensers
that are precisely matched to the
heat rejection requirements of our
precision air conditioning systems.
Constructed with an aluminum
cabinet and a copper-tube aluminum-
fin coil, these exceptionally
dependable units are corrosion
resistant and designed to operate for
prolonged periods of exposure to the
worst weather conditions. Liebert
condensers are fully factory wired
and tested for easy installation.




I   Wide range of configurations — including horizontal and       I   Indoor piggyback condensers — convert Liebert
    vertical airflow configurations.                                  environmental control units to completely self-contained
I   Standard units — ambient temperature ratings of 85°F              systems in applications where an outdoor heat rejection
    (29.4°C) to 105°F (40.6°C).                                       location is not practical, such as high-rise buildings.
I   Liebert Lee-Temp option — winter control system’s             I   Indoor centrifugal condensers — high rise applications
    heated receivers permit startup and positive head pressure        where outdoor heat rejection is not available
    control at ambient temperatures as low as -30°F (-34.4°C).    I   High ambient condensers — utilize increased coil surfaces
I   Fan Speed Control — winter control system features a              for operation in outdoor climates up to
    variable speed motor specifically designed to be used in          120°F (48.9°C).
    conjunction with the solidstate fan-speed control             I   Quiet-Line™ condensers — operate with the lowest noise
    transducer. These transducers directly sense the head             level of any heat rejection equipment available, offering
    pressure of either of the compressors and vary the speed of       levels of less than 57 dBA.
    the fan to maintain constant condensing temperature and
    system capacity. This system allows for operation at
    ambient temperatures as low as -20°F (-28.9°C).
STAND-ALONE MONITORING AND
     LEAK DETECTION SOLUTIONS
                                                                                                                  Liqui-tect
                                                                                                                  410 Point
                                                                                                                  Leak Detection
     Autonomous microprocessor controlled modules are available to provide                                        Configuration

     supervision, control and remote notification of Liebert precision cooling
     equipment. These stand-alone devices include:




     Liebert Universal Monitor
18     The Liebert Universal Monitor is an all-purpose easy                                                       Liqui-tect
     to use, microprocessor-based monitoring panel with                                                           460 Zone
                                                                                                                  Leak Detection
     connections for up to 8 digital inputs, 8 digital outputs and 4                                              Configuration
     analog inputs. Designed to bring critical monitoring
     information directly to your facility or offsite location, the
     unit includes an on-board modem to provide remote
     monitoring while minimizing configuration and installation
     requirements. It features a built-in LCD user interface,
     making the panel self contained and accessible without
     additional hardware and software.


     Contact Closure Alarm Panels                                        Liebert Leak Detection Modules
       The Liebert RCM series of contact closure alarm panels              Liebert Liqui-tect® leak detection systems provide
     provides customized alarm indication at a single location for       quick sensing and accurate reporting of leaks below
     any dry contact input from environmental, power and UPS             the floor or above the ceiling in critical facilities.
     systems, including Liebert units. These remote systems              These reliable systems provide immediate warning
     continuously monitor your most critical support equipment           and precise location, allowing you to find and
     and instantly alert you to alarm conditions. Three different        correct a leak before moisture can damage computers,
     system configurations are available for monitoring up to            wiring connections or other sensitive electronics.
     eight points with communications and pager interface plus
     eight digital outputs.                                              Temperature and Humidity Recorder
                                                                           A seven-day temperature and humidity recorder permits
                                                                         close examination of computer room environment condition
                                                                         and can be used as a permanent record of the environmental
                                                                         control system's operation efficiency.




     Liebert Universal Monitor
MAXIMIZING YOUR INVESTMENT
THROUGH ADAPTIVE MONITORING


Distributed Management                   Centralized Mangement                     Enterprise Management
with OpenComms                           with OpenComms                            with SiteScan Web
Interface Cards                          Nform Software                            Software
  For enchanced remote communications      As business grows your critical           For customers that require extensive
and control of your Liebert units, the   equipment infrastructure will expand,     management of critical system
OpenComms Web cards will deliever        thus the need for centrailzed             equipment that may spand multiple
SNMP and web-management                  management of this equipment will         locations in an ever moving global                   19
communications capabilities.             be key to your business success.          enterprise, SiteScan Web will centrally
                                         Connecting to equipment in the            manage your critical equipment and
  Monitoring and control through         distributed critcial space is only part   give you the power to move beyond
your existing Network with not           of the monitoring challenge.              the event responsive service paridigm.
additional software required.
                                           Liebert OpenComms Nform                 SiteScan Web does it all —
                                                                                   I Real-Time Monitoring and Control
  Each Liebert system equipped with      leverages the network connectivity
                                                                                   I Event Management and Reporting
an OpenComms Web card takes full         capabilities of your Liebert equipment
                                                                                   I Data Analysis and Trending
advantage of your Ethernet network,      to provided a centralized monitoring
                                                                                   I Building Management Integration
allowing remote monitoring from your     view of your distributed equipment.
computer desktop, network operations
                                                                                     Liebert SiteScan®Web is a
center or whereever network access         Utilizing the SNMP and Web
                                                                                   comprehensive critical systems
is permitted, without the need for       technologies built into each of the
                                                                                   management solution dedicated to
front-end software.                      OpenComms communication cards,
                                                                                   ensuring reliability through graphics,
  The OpenComms Web cards support        OpenComms Nform will centrally
                                                                                   event management and data
10 and 100 MBit Ethernet network         manage alarm notifications to provide
                                                                                   extrapolation. The standard Web
transmissions speeds, which will be      you with an easy interface to access
                                                                                   interface allows users easy access
auto-detected upon connection to         critical status information. OpenComms
                                                                                   from anywhere at anytime.
the network. Plus, these cards support   Nform puts critical systems               I Single and multi-site applications.
in-the-field firmware updates, which     information at the fingertips of          I Event management and unit control.

increase the value of your investment.   support personnel - wherever they         I Trend and historical data captures

                                         are- increasing responsiveness to           and reporting.
                                         alarm-event conditions, thus allowing     I Full ASHRAE BACnet compatibility.

                                                                                   I Java based.
                                         IT organizations to maximize their
                                                                                   I Windows 2000, XP and 2003
                                         system availability.
                                                                                     compatible.




                                                                                                                        Site Scan Web
                                          OpenComms Nform
         OpenComms Web
Ensuring The High Availability Of
Mission-Critical Data And Applications.



                                                                                                           Liebert Corporation
                                                                                                           1050 Dearborn Drive
                                                                                                           P.O. Box 29186
                                                                                                           Columbus, Ohio 43229
                                                                                                           800 877 9222 Phone (U.S. &
Trust Liebert to deliver power protection and cooling strategies to ensure
                                                                                                           Canada Only)
business continuity through the high constant availability of mission-critical data,                       614 888 0246 Phone (Outside U.S.)
                                                                                                           614 841 6022 FAX
applications and communications.
                                                                                                           Via Leonardo Da Vinci 8
                                                                                                           Zona Industriale Tognana
  Liebert provides a high-availability strategy of applying adaptive                                       35028 Piove Di Sacco (PD)
technologies across your network. This expertise comes from decades                                        Italy
                                                                                                           39 049 9719 111 Phone
of protecting the most critical systems in the world from downtime, data                                   39 049 5841 257 FAX
loss and equipment damage. Liebert knows how to assess your network
                                                                                                           Emerson Network Power Asia Pacific
availability to ensure your enterprise information and applications will                                   7/F., Dah Sing Financial Centre
always be available, even as networks and technology change.                                               108 Gloucester Rd, Wanchai
                                                                                                           Hong Kong
                                                                                                           852 25722201 Phone
  Liebert delivers unmatched support and service before, during and after                                  852 28029250 FAX

installation. Liebert is the only company in the industry that maintains                                   liebert.com
a national network of technical experts to assess customer needs and
recommend appropriate solutions. And, Liebert provides comprehensive                                       24 x 7 Tech Support
support through the largest service organization in the industry. Liebert                                  800 222 5877 Phone
                                                                                                           614 841 6755 (outside U.S.)
is backed by the development and technology resources as well as the
expertise of Emerson Network Power, the global leader in powering                                          While every precaution has been taken to ensure accuracy and
                                                                                                           completeness in this literature, Liebert Corporation assumes no
business-critical systems.                                                                                 responsibility, and disclaims all liability for damages resulting
                                                                                                           from use of this information or for any errors or omissions.

                                                                                                           © 2005 Liebert Corporation. All rights reserved throughout
                                                                                                           the world. Specifications subject to change without notice.
  The full range of Liebert solutions helps you create an information                                      All names referred to are trademarks or registered trademarks
                                                                                                           of their respective owners.

infrastructure that delivers the level of network reliability you need—                                    ® Liebert and the Liebert logo are registered trademarks
                                                                                                           of the Liebert Corporation.

both now and in the future—to keep your business running.                                                  SLI-18810 (R2/06)      Printed in USA




Emerson Network Power.
The global leader in enabling business-critical continuity.                                                EmersonNetworkPower.com
   AC Power Systems             Embedded Power                            Outside Plant
   Connectivity                 Power Protection                          Precision Cooling
   DC Power Systems             Integrated Cabinet Solutions              Site Monitoring and Services

Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2006 Emerson Electric Co.

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  • 1. Precision Cooling for Business-Critical Continuity Designed To A Higher Standard Of Performance And Reliability Liebert DS ™ 50 HzDownflow Model
  • 2. LIEBERT UNDERSTANDS THE NEED FOR PRECISION AND RELIABILITY… AND WHY THIS IS SO IMPORTANT TO YOU For sensitive electronics, environmental control is more than We Have The Right Solution For Your simple cooling. “Comfort” air conditioning systems are Specific Application Liebert has identified a number of distinct zones or areas of designed to cool people and office space. They simply cannot 2 application, found within many business-critical applications, provide the kind of environment required by high which have a requirement for mission-critical cooling performance computer or communication equipment. technologies. Each zone has similarities but with different needs for infrastructure protection — all of which can be met by Liebert solutions. Why You Can’t Take Chances Specific zones where the Liebert DS can be used include: When Cooling Your Critical Space I Data Centers I Telecom/CATV Standard building cooling systems are designed to keep I Computer Rooms I Labs And Testing people comfortable 8-12 hours each day, five days a week I Network Operations Centers I Production Facilities and only during the warmest months. Sensitive electronics must be maintained in a stable environment of 68°F to 77°F (20°C to 25°C) with a relative humidity of 40% to 55%. Because computers and communications equipment generate large quantities of heat in small areas, six to 10 times the heat density of normal office space, the air conditioning system must A Tradition Of Reliability You Can Count On have more than just enough cooling capacity. It must have Liebert Mission Critical Cooling equipment is the standard the precision to react quickly to a drastic change in by which all others are judged. The number of units that are in heat load and prevent wide temperature fluctuations the field far exceeds the combined number of all other brands. — something a large building HVAC system cannot do. 9 out of 10 Fortune 500 Companies use Liebert cooling systems. Liebert Mission-Critical Cooling Systems are used in the most demanding, critical applications in the world. From banking to 80 government to corporate computer and communications The ASHRAE document, “Thermal Guidelines centers, when it has to be the best — this is the brand of choice. for Data Processing Environments,” spells out 75 the temperature, dew point and humidity ity specifications for electronic components t in id Po um operating in mission-critical facilities. eH n 70 io Types of equipment typically found tiv ity at la id Re in these facilities are enterprise servers ns m Why You Should Specify Liebert Over % Hu de 60 e and storage products. 65 ti v n la Competitive Precision Systems Co Re ity id 0% m 5 Hu 60 ive Proper protection of critical facilities takes more than lat Re 55 40 % bolting together pre-engineered computer room cooling 50 modules. In many cases, your critical systems are only as Relative Humidity reliable as the support equipment protecting them. 60% 50% Primary precision air Compromising on a less capable precision cooling system 40% conditioning systems can compromise your operations. Your critical operations keep room temperature and humidity within demand support equipment that can provide the highest this area of control. 50 55 60 65 70 75 80 level of reliability. Room Temperature (°F)
  • 3. THE LIEBERT DS IS DESIGNED AND BUILT LIKE NO OTHER 3 Designed For Reliability Because electronic system availability is required 24 hours a day, 365 days a year, the environmental control system must meet the same demands. The Liebert DS is designed with the highest quality components selected for their proven reliability. 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. Year-Round Operation Under Many Climate Conditions Comfort conditioning systems cannot Engineering Excellence Goes be relied upon 24 hours per day 365 days Into Every Liebert DS per year. They are typically designed to The Liebert DS is based on the proven design and operate 10 hours per day, from spring to autumn. Many comfort systems have no technology of Liebert Deluxe Systems used in thousands provision for winter operation. A precision of critical data centers around the world since 1965. environmental control system is designed to operate over a wide range of ambient Full scale analysis and evaluation of the Liebert DS during all temperatures from as low as –30°F phases of development and production is your assurance of (-34.4°C) up to 120°F (48.9°C). the most advanced performance and highest quality. Units are thoroughly tested under a wide variety of temperature and Precise Temperature And humidity conditions. Humidity Control The environmental control system must be able to sense and react to temperature and humidity fluctuations far too small for building HVAC systems to control. The Liebert DS is capable of responding to changes as small as ±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 respond to what has happened.
  • 4. ENGINEERED FOR STRENGTH AND APPLICATION FLEXIBILITY The Liebert DS is designed to fit room applications requiring Downflow Configurations 4 Designed for use in raised floor applications, such as data high level precision control of room environment, including centers, the Liebert DS downflow configuration combines temperature, humidity, filtration and airflow. top air return with bottom air supply to circulate air underneath the floor. Designed For Energy Efficiency Liebert is dedicated to providing maximum energy Quality, Rugged Construction efficiency in its precision cooling systems without The durable design of the Liebert DS provides a stable, compromising the accuracy and reliability demanded by virtually vibrationless platform for compressor and fan sensitive electronics. All enhancements to energy efficiency operation. are designed to reduce operating time of key components Autophoretic® frame coating — protects frame against and increase the Mean Time Between Failure. This is corrosion for years of reliable service. accomplished by taking advantage of alternate sources Welded frame — 14 gauge steel provides rugged of cooling without being dependent on their availability construction, proven to withstand shipping and or by minimizing compressor operation when heat loads in handling through ISTA (International Safe Transit the conditioned space are lower. Energy savings is also Association) certified ship testing. gained through the use of high efficiency components Durable powder coated exterior panels — look such as advanced digital scroll and 4-step semi-hermetic good and stay that way. compressors. 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 floorstands allow for installation and connection of the system prior to the installation of the raised floor. Available in heights from 6” to 36”. A field installed turning vane may be specified.
  • 5. 5 Front Access And Serviceability Save Valuable Floor Space Total front access provides space and serviceability benefits 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 visible and accessible — from the front of the unit for easy maintenance and removal. Compressors removable from front — isolated from air stream for easier maintenance. Modular Frame Construction The unit’s modular frame construction allows even more flexibility in meeting specific needs for installation, energy efficiency and other special requirements. Frame can be field separated into three sections — enables unit to fit into small elevators or through other tight spaces.
  • 6. AIR DELIVERY SYSTEM DESIGNED FOR OPTIMIZED AIR DISTRIBUTION AND LONG SERVICE LIFE Centrifugal blowers enable performance over High efficiency 5-YEAR DRIVE COMPONENTS a wide range of air motor meets (bearings, belts, shaft, pulleys) volume and static NEMA Premium pressure ranges. motor standard. Computers and other sensitive electronics 6 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. Constant delivery Flexibility for Static regain Pillow block fan of full airflow to high filtration or duct improves bearing with keep delivering external static underfloor air minimum L3 life Special 5-year cold air whenever pressures up distribution. of 200,000 hours. Liebert Belt needed. to 2.5" (625 Pa). Pentadrive ™ Blower System Clean, even air distribution is supplied by large capacity fans, which are statically and dynamically balanced to Pentadrive Blower system/belt ™ minimize vibration. Air is drawn evenly and at low velocity tensioning: through the system, using less fan motor energy and operating more quietly than forced air blowers. Filtered air I Automatic Self-tensioning motor at the right temperature and humidity is fed positively and base increases belt life and reliability evenly into the room. of shaft and bearings. I Keeps constant tension on belt. I Maintains good sheave and pulley alignment. I Prevents over-tightening. I Dual belts for 100% redundancy.
  • 7. Electric Panel The electric panel of the Liebert DS is designed for easy access to critical electrical and control components. Low voltage Optional disconnect terminal strip switch available Location for Solidstate contactors provides as locking or optional secondary for optional SCR Contactors, Miniature Circuit connection Control interface non-locking disconnect switch reheat IEC type Breakers flexibility board for easy access 7 Unit Monitoring And Control Options I Dual float condensate pump — installed in unit, with secondary float to shutdown unit and trigger alarm if high water detected Motors I Optional Low Voltage Terminal Package — two extra n/o common alarm contacts, The Liebert DS features fan motors two extra remote shutdown terminals, one main fan auxilliary contact, water sensor that are optimized for reliability and signal shutsdown unit, and provides dry contact (water sensor is optional). energy efficiency. I Smoke sensor — senses the return air, shuts down the unit upon detection, and sends High efficiency open drip proof visual and audible alarm. Dry contacts are available for a remote customer alarm. This motor meets National Electrical smoke sensor is not intended to function as, or replace, any room smoke detection system Manufacturers Association (NEMA) that may be required by local or national codes. I High temperature sensor — alerts users to any high temperature situations Premium motor standard. within the system. Senses return air temperature and shuts down unit if temperature Motor Options exceeds 125°F (51.7°C) I Optional TEFC (totally enclosed I Analog input wiring — includes four customer accessible analog inputs for sensors provided by others. The analog inputs accept a 4 to 20 mA signal. Gains fan-cooled) motors — for rugged Calibration for each input are programmable from the front panel. industrial environments. I Compressor overload — activates an audible and visual alarm in the event I Optional larger horsepower of a compressor overload. motors available — for higher air I Main Fan Overload - activates an audible and visual alarm in the event of a volume or higher static pressures. motor overload.
  • 8. DEPENDABLE, EFFECTIVE COOLING SYSTEM At the heart of the Liebert DS are its cooling system components, each designed to provide maximum reliability. 8 Draw through design pulls air evenly through the cooling coil, reheat and humidification systems. A-frame coil design maximizes coil area reduces air velocity, lowers chance of water blowing off coil, results in far less turbulence with superior efficiencies in heat transfer. Optional polymeric coating on coils protects against corrosion due to harsh environments. A-frame coil Refrigeration System Features This Liebert designed and manufactured A-Frame coil Each refrigeration circuit includes: features a large face area/low face velocity design for precise I Sight glasses — serve as a means of quick visual inspection control of cooling and dehumidification — and is designed to to determine if there is moisture in the system and if the optimize heat transfer and minimize pressure drop. system is properly charged. I Refrigerant dehydrators — assure a moisture-free Dual Refrigeration Circuits For Redundancy refrigerant system for extended component life. Dual compressors and refrigeration circuits assure reliability I Expansion valve — externally equalized expansion and feature automatic sequencing for even wear of valves smoothly control refrigerant flow during indoor components. heat loads and outdoor ambients by controlling I Components include — dual compressors and dual evaporator superheat. refrigeration circuits enabling the system to operate even if I Muffler — specially engineered mufflers afford a quiet one circuit fails. pulsation free refrigeration system. I Pump-down evacuation of refrigerant from compressor I Safety controls — Each compressor has an automatic crankcase — shields the compressors from the "hard starts" reset high pressure switch, that locks-out after the third that can shorten their life. trip. A low pressure transducer protects against coil freezing and low refrigerant pressure.
  • 9. DUAL COOLING OPTION INCREASES ENERGY EFFICIENCY For even greater efficiency, Liebert offers energy efficient alternatives such as its Dual Cool option, which provide compressorless operation, where climate permits, to substantially reduce energy costs. Dual Cooling coil increases availability by 9 using building chilled water as primary, compressor as back-up. Optional econo-coil nested within A-frame coil to minimize air pressure drop and increase efficiency Provides redundancy and energy savings for increased ROI. Optional 70/30 Cu/Ni free-cooling coil must be specified to prevent tube corrosion when using with a cooling tower loop or other open water system. Dual Cool Utilizing this option, a conventional air cooled Liebert DS Modulating econo- coil valve controls is converted to a dual source cooling system by the addition chilled water for of a second coil that utilizes a central building chiller supply. dual-cooling systems Using a modulating control valve and a comparative temperature sensor, the unit can function either as a chilled water system, as a compressorized system — Modulating valve— for or a combination of both. optional dual During times when the chiller supply is available, cooling or free-cooling coil. compressor operation is eliminated, reducing energy costs. . Switchover between the two cooling modes is performed automatically by a microprocessor control and temperature sensor. In addition to energy efficiency, this option can provide increased redundancy and flexibility to the environmental control system.
  • 10. CONTROLLING THE CRITICAL ENVIRONMENT A key to the ability of a quality Mission Critical Cooling system to control conditions within the critical space is its high “sensible heat ratio.” Standard Infrared Humidifier Instant humidification on when needed, off when not needed. 10 Unlike people, computers generate dry or “sensible” heat, but not humidity. With a large percentage of their total capacity devoted to the removal of moisture, comfort systems can lower room humidity far below acceptable standards for electronic equipment — and they have no provisions for adding moisture. To correct this situation, precision air conditioning systems typically have a high ratio of sensible-to-total cooling capacity to remove heat from the air. This capability is provided through the use of integrated humidification systems to provide the necessary level of moisture control, higher air supply capacity and larger coil size. Humidifier make-up Pure water vapor Does not depend on water quality. High valve controls flow provides most intensity quartz lamps shine on water of water to the effective creating instantaneous moisture using humidifier pan. humidification. almost any water quality. Humidity Control Maintaining the correct humidity level in the room is just as important as maintaining proper temperature. Inadequate humidity control can cause static electricity if it’s too dry — or condensation that can corrode circuitry if the air is too moist. Comfort cooling systems can lower room humidity far below acceptable standards for electronic equipment — and they usually have no Optional Steam Generating provisions for adding moisture. The Liebert DS utilizes an integrated Canister Humidifier humidification system to provide the necessary level of moisture control. I Utilizes replaceable bottle— requires a specific water quality Dehumidification Control level for optimum operation. The compressors operate at full capacity during dehumidification. The I Utilizes a drain and refill cycle— precision control of the Liebert DS saves energy by tightly regulating to maintain a current setpoint. compressor operation and avoiding over-dehumidification that causes the humidifier to come on when not needed.
  • 11. Minimum Efficiency Reporting Value (MERV), adopted by ASHRAE in it's 52.2 standard. 11 Filtration System The Liebert DS features integral air filtration to protect against airborne contaminants within the critical environment. Without proper air filtration, even small amounts of dust and other particles can damage storage media and charged electronic components. • High efficiency air-filtration — removes damaging particles from air. • Standard filter — 4” deep, Merv 8. (45% ASHRAE 52.1). • Optional high efficiency filter — 4” deep, Merv Merv 11 (60-65% ASHRAE 52.1) • Optional 2" Merv7 pre-filter with 2" Merv 11 filter. • V bank filter arrangement — reduces air pressure drop, top filter access. Autoflush system High water float Bypass air slots Cleanable stainless Natural air-gap. reduces build-up switch shuts ensure that steel humidifier No need for back- mineral deposits down humidifier moisture can be pan. Removable flow prevention. and impurities in upon high water. introduced into from front. the water pan. air stream. Reheat Options Reheat Function I SCR electric reheat — For The reheat function of the Liebert DS is primarily specialized applications requiring used to keep the temperature from going too low tight temperature control. during the dehumidification cycle. Multiple pulses of reheat vs. three equal stages provide smooth Standard Reheat temperature adjustment. I Three-stage electric reheat — low watt-density, 304 I Optional hot water reheat — stainless-steel fin-tubular reheat, location maximizes Uses existing building hot water, airflow to maximize element life and improve reliability. saving energy. I Reheat/humidifier lockout — Reduces power requirements during emergency power operation.
  • 12. A CHOICE OF COMPRESSORS OFFERS HIGHER EFFICIENCY, ADAPTABILITY AND RELIABLE OPERATION It Starts With Reliable Scroll New Refrigerants To Meet Government Regulations Compressor Technology Without the ability to utilize newer environmentally-friendly The scroll compressor design provides high efficiency, refrigerants, your cooling equipment could become obsolete low sound levels and excellent durability. The Liebert DS and “out of compliance.” The Montreal Protocol and EPA precision cooling system is available with either: Clean Air Act require cooling equipment manufacturers to I A standard fixed-capacity scroll compressor. switch to environmentally-friendly refrigerants by 2010 I An optional Digital Scroll compressor with energy I R-407C — is Liebert’s choice for optional environmentally- 12 saving, variable capacity operation. friendly refrigerant to meet future environmental standards. This is the best fit for Liebert applications, with The Standard Scroll Compressor: near drop-in replacement. Rugged, Quiet, Efficient I R-22 — is the standard refrigerant offered in the Liebert DS The standard scroll compressor offers efficient, reliable I Field conversion — from R-22 to R-407C refrigerant is performance with a robust design that contains only a few most practical for scroll compressors. Systems operating moving parts. Quiet operation is accomplished through on R-22 use mineral oil, while R-407C refrigerants utilize a continual, smooth compression process. Discharge gas POE (polyolester) oil. Therefore, a complete system and vibration are kept at a low level. clean-out may be required. The Digital Scroll Compressor: A New Standard For Performance and Reliability The exclusive digital scroll compressor option on the Liebert DS utilizes the latest control technology to deliver precise operation and significantly higher energy efficiency. In addition to the advantages of the dependable scroll design, Digital Scroll technology provides infinitely variable capacity modulation that enables the output to precisely match the changing cooling demands of the room. This approach is as much as 30 percent more efficient than traditional hot-gas bypass. Benefits include: I Greater energy savings— variable capacity system allows maximum load tracking for higher efficiency. I Improved reliability — by reducing compressor cycling and component wear. I Improved Performance — the compressor can easily adapt to changing load conditions, providing precise temperature control.
  • 13. Digital Scroll Compressors Cumulative Compressor Cycles No other precision air conditioning product line offers As Load Grows From 50% To 100% as many choices for energy efficiency as the Liebert DS. The exclusive digital scroll compressor option utilizes the 60% Load 70% Load 80% Load 90% Load 140000 latest control technology to deliver significantly higher Cumulative Compressor Cycles 120000 Single Compressor energy efficiency. 100000 I Variable capacity system — for maximum load tracking, 80000 Two Compressors 13 reduced compressor cycling and minimized compressor wear. 60000 I Optional crankcase heater — for quick start operation. 40000 I Saves energy over single-stage compressors. 20000 I Improves reliability by reducing compressor cycling. Digital Compressor 0 Year 1 Year 2 Year 3 Year 4 Increasing compressor cycling takes a toll on compressor life. Liebert Four-Step Semi-Hermetic compressors and Digital Scroll compressors automatically adjust to yearly increases in heat Digital Scroll Capacity Control Diagram load, providing significantly greater component life than other compressor technologies. 100% 7.5 secs capacity 50% Load 0% 7.5 secs capacity 15 secs 5 secs 33% Load 10 secs 15 secs Digital Scroll Capacity adapts as load changes Future Load 100% Initial Load 10% Capacity Load
  • 14. LIEBERT 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. The standard Small 14 Graphic Display features a 128x64 dot matrix backlit screen. Advanced monitoring can be achieved with the addition of the Optional Wall Mounted Display. Removable display makes servicing easier. Small Graphic Display Intelligent Communications Parts list available on control for easier maintenance. And Monitoring I Saves Energy using Predictive Humidity Control. I Built-in Lead/Lag Functions for enhanced system reliability. I Wellness Calculation alerts service personnel before problems occur. I Unit to Unit Communications allows Lead/Lag and optional teamwork settings for maximum flexibility of control. Monitors all key system functions and reports to alarm, if needed. The Optional Wall Mounted Large Graphic Display provides centralized monitoring and On-board Unit Diary provides a control of connected maintenance history to any Liebert DS units. authorized user.
  • 15. Standby Settings (Lead/Lag Set-up) The optional Large Graphic Display features a 320x240 dot matrix backlit screen with helpful system and maintenance views. Additional Views Available with Large Graphic Displays 15 I System View — Allows you to see the average operation of the “system” or all units that are working together in Unit to Unit (U2U) Communication mode for Teamwork or Lead/Lag from a centralized location. I Spare Parts List — Critical spare part numbers are saved in unit memory and may be displayed on the Large Graphic Display, speeding Maintenance/ identification of parts. Large Graphic Display Wellness Set-up I Unit Diary — Free field area within the unit memory where unit maintenance shares history with any authorized users or logged-in service contacts, including record of what others have done. Spare Parts Unit Diary U2U Configuration 2 Teamwork: Mode 2 Liebert DS units with Small Graphic Display may Units work together to provide precision be centrally monitored and controlled with the cooling in rooms with unbalanced loads. Optional Wall Mounted Display.
  • 16. PARADENSER ™ CLEANABLE CONDENSER PROVIDES LIEBERT DS WITH LONGER SERVICE LIFE The Liebert DS mission-critical cooling system offers the new 16 Paradenser ™ condenser for use in water/glycol systems. This patented component utilizes a counter-flow design and features a shell and tube type construction. I Fully cleanable — eliminates costly condenser failures due to plugging and providing a longer service life. Large water passages prevent plugging and allow for conventional tube cleaning methods. I Constructed of copper tubes with removable cast iron heads nickel plated plugs— the Paradenser can be mechanically cleaned from the top. I Shell side of the condenser acts as a receiver — holds refrigerant charge during pumpdown. I Works equally well with either R-407C or R-22 Fully cleanable Paradenser refrigerants — Counterflow design and high refrigerant tubes are located for convenient maintenance. velocities significantly maintain performance when using R-407C refrigerant. I Utilizes no gaskets — offers further reliability by preventing leaks.
  • 17. LIEBERT HEAT REJECTION SYSTEMS— FLEXIBLE CONFIGURATIONS TO MEET APPLICATION REQUIREMENTS Liebert Condensers Liebert manufactures its own 17 high-efficiency, air cooled condensers that are precisely matched to the heat rejection requirements of our precision air conditioning systems. Constructed with an aluminum cabinet and a copper-tube aluminum- fin coil, these exceptionally dependable units are corrosion resistant and designed to operate for prolonged periods of exposure to the worst weather conditions. Liebert condensers are fully factory wired and tested for easy installation. I Wide range of configurations — including horizontal and I Indoor piggyback condensers — convert Liebert vertical airflow configurations. environmental control units to completely self-contained I Standard units — ambient temperature ratings of 85°F systems in applications where an outdoor heat rejection (29.4°C) to 105°F (40.6°C). location is not practical, such as high-rise buildings. I Liebert Lee-Temp option — winter control system’s I Indoor centrifugal condensers — high rise applications heated receivers permit startup and positive head pressure where outdoor heat rejection is not available control at ambient temperatures as low as -30°F (-34.4°C). I High ambient condensers — utilize increased coil surfaces I Fan Speed Control — winter control system features a for operation in outdoor climates up to variable speed motor specifically designed to be used in 120°F (48.9°C). conjunction with the solidstate fan-speed control I Quiet-Line™ condensers — operate with the lowest noise transducer. These transducers directly sense the head level of any heat rejection equipment available, offering pressure of either of the compressors and vary the speed of levels of less than 57 dBA. the fan to maintain constant condensing temperature and system capacity. This system allows for operation at ambient temperatures as low as -20°F (-28.9°C).
  • 18. STAND-ALONE MONITORING AND LEAK DETECTION SOLUTIONS Liqui-tect 410 Point Leak Detection Autonomous microprocessor controlled modules are available to provide Configuration supervision, control and remote notification of Liebert precision cooling equipment. These stand-alone devices include: Liebert Universal Monitor 18 The Liebert Universal Monitor is an all-purpose easy Liqui-tect to use, microprocessor-based monitoring panel with 460 Zone Leak Detection connections for up to 8 digital inputs, 8 digital outputs and 4 Configuration analog inputs. Designed to bring critical monitoring information directly to your facility or offsite location, the unit includes an on-board modem to provide remote monitoring while minimizing configuration and installation requirements. It features a built-in LCD user interface, making the panel self contained and accessible without additional hardware and software. Contact Closure Alarm Panels Liebert Leak Detection Modules The Liebert RCM series of contact closure alarm panels Liebert Liqui-tect® leak detection systems provide provides customized alarm indication at a single location for quick sensing and accurate reporting of leaks below any dry contact input from environmental, power and UPS the floor or above the ceiling in critical facilities. systems, including Liebert units. These remote systems These reliable systems provide immediate warning continuously monitor your most critical support equipment and precise location, allowing you to find and and instantly alert you to alarm conditions. Three different correct a leak before moisture can damage computers, system configurations are available for monitoring up to wiring connections or other sensitive electronics. eight points with communications and pager interface plus eight digital outputs. Temperature and Humidity Recorder A seven-day temperature and humidity recorder permits close examination of computer room environment condition and can be used as a permanent record of the environmental control system's operation efficiency. Liebert Universal Monitor
  • 19. MAXIMIZING YOUR INVESTMENT THROUGH ADAPTIVE MONITORING Distributed Management Centralized Mangement Enterprise Management with OpenComms with OpenComms with SiteScan Web Interface Cards Nform Software Software For enchanced remote communications As business grows your critical For customers that require extensive and control of your Liebert units, the equipment infrastructure will expand, management of critical system OpenComms Web cards will deliever thus the need for centrailzed equipment that may spand multiple SNMP and web-management management of this equipment will locations in an ever moving global 19 communications capabilities. be key to your business success. enterprise, SiteScan Web will centrally Connecting to equipment in the manage your critical equipment and Monitoring and control through distributed critcial space is only part give you the power to move beyond your existing Network with not of the monitoring challenge. the event responsive service paridigm. additional software required. Liebert OpenComms Nform SiteScan Web does it all — I Real-Time Monitoring and Control Each Liebert system equipped with leverages the network connectivity I Event Management and Reporting an OpenComms Web card takes full capabilities of your Liebert equipment I Data Analysis and Trending advantage of your Ethernet network, to provided a centralized monitoring I Building Management Integration allowing remote monitoring from your view of your distributed equipment. computer desktop, network operations Liebert SiteScan®Web is a center or whereever network access Utilizing the SNMP and Web comprehensive critical systems is permitted, without the need for technologies built into each of the management solution dedicated to front-end software. OpenComms communication cards, ensuring reliability through graphics, The OpenComms Web cards support OpenComms Nform will centrally event management and data 10 and 100 MBit Ethernet network manage alarm notifications to provide extrapolation. The standard Web transmissions speeds, which will be you with an easy interface to access interface allows users easy access auto-detected upon connection to critical status information. OpenComms from anywhere at anytime. the network. Plus, these cards support Nform puts critical systems I Single and multi-site applications. in-the-field firmware updates, which information at the fingertips of I Event management and unit control. increase the value of your investment. support personnel - wherever they I Trend and historical data captures are- increasing responsiveness to and reporting. alarm-event conditions, thus allowing I Full ASHRAE BACnet compatibility. I Java based. IT organizations to maximize their I Windows 2000, XP and 2003 system availability. compatible. Site Scan Web OpenComms Nform OpenComms Web
  • 20. Ensuring The High Availability Of Mission-Critical Data And Applications. Liebert Corporation 1050 Dearborn Drive P.O. Box 29186 Columbus, Ohio 43229 800 877 9222 Phone (U.S. & Trust Liebert to deliver power protection and cooling strategies to ensure Canada Only) business continuity through the high constant availability of mission-critical data, 614 888 0246 Phone (Outside U.S.) 614 841 6022 FAX applications and communications. Via Leonardo Da Vinci 8 Zona Industriale Tognana Liebert provides a high-availability strategy of applying adaptive 35028 Piove Di Sacco (PD) technologies across your network. This expertise comes from decades Italy 39 049 9719 111 Phone of protecting the most critical systems in the world from downtime, data 39 049 5841 257 FAX loss and equipment damage. Liebert knows how to assess your network Emerson Network Power Asia Pacific availability to ensure your enterprise information and applications will 7/F., Dah Sing Financial Centre always be available, even as networks and technology change. 108 Gloucester Rd, Wanchai Hong Kong 852 25722201 Phone Liebert delivers unmatched support and service before, during and after 852 28029250 FAX installation. Liebert is the only company in the industry that maintains liebert.com a national network of technical experts to assess customer needs and recommend appropriate solutions. And, Liebert provides comprehensive 24 x 7 Tech Support support through the largest service organization in the industry. Liebert 800 222 5877 Phone 614 841 6755 (outside U.S.) is backed by the development and technology resources as well as the expertise of Emerson Network Power, the global leader in powering While every precaution has been taken to ensure accuracy and completeness in this literature, Liebert Corporation assumes no business-critical systems. responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions. © 2005 Liebert Corporation. All rights reserved throughout the world. Specifications subject to change without notice. The full range of Liebert solutions helps you create an information All names referred to are trademarks or registered trademarks of their respective owners. infrastructure that delivers the level of network reliability you need— ® Liebert and the Liebert logo are registered trademarks of the Liebert Corporation. both now and in the future—to keep your business running. SLI-18810 (R2/06) Printed in USA Emerson Network Power. The global leader in enabling business-critical continuity. EmersonNetworkPower.com AC Power Systems Embedded Power Outside Plant Connectivity Power Protection Precision Cooling DC Power Systems Integrated Cabinet Solutions Site Monitoring and Services Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2006 Emerson Electric Co.