liebert

Precision Cooling For Business-Critical Continuity

Liebert XDFlexible, Energy-Saving Cooling Solutions For High Heat Density Applications

22

High Heat Density. High Temperatures.

Todays data center technologies compound conventional coolingproblems. Blade servers, communications switches and other electronicsare being packed into tighter and tighter spaces. Computing capacity thatonce filled an entire room is now contained in a single rack creatingextreme power and heat densities.

Conventional Solutions Just Cant Keep Up

While the cornerstone of an effective cooling strategy, you cant rely solely

on conventional mission-critical cooling systems to resolve such high

heat densities. Hot spots or zones require targeted cooling solutions.

And, for extremely high heat loads, conventional approaches may

simply take up too much floor space to be practical.

Business continuity professionals will rely on an integrated solution one

that solves both room-level and rack-level cooling challenges.

Higher Watt, Higher Heat Densities

This increased capacity is fueled by rapid growth in processing capacity. But,

more compact capacity means higher heat densities. What was a 1 kW rack

now may exceed 10 kW. This requires a shift in focus from a room-based

view of cooling to a rack-based view. More literally, business continuity

professionals must consider both Watt per square foot and kW per rack

when evaluating cooling solutions.

Today, more than ever, environmental and economic

issues are pushing business continuity professionals to

lobby for energy efficient, environmentally friendly

solutions in their data centers. The Liebert XD solution is

the answer on both fronts. With a hybrid approach that

requires 15% - 50% less chiller plant capacity, as well as

less diesel generator and switchgear capacity required,

the potential energy consumption for your centers is

reduced up to 40%. The significant energy savings

achieved by the Liebert XD solution are attributed to

these factors:

Locating cooling units closer to the load reducesthe energy required to move the air and resultsin less mixing of hot and cold air.

Micro channel coils provide minimal air pressuredrop losses and improved thermal heat transfer.

No need to over-chill data centers to eliminatehot spots.

However, flexibility is also an important attributeof your cooling systems. The Liebert XD solution a combination of floormount mission-criticalcooling units and supplemental cooling allowsyour facility to adapt as heat loads increase. And byadding/reconfiguring solutions to react to changesin your environment, the flexible configuration ofthe Liebert XD system modules also allowsscalability for future growth.

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3

No Relief In Sight: Heat Loads Rising

Hotter FacilitiesAs processor capabilities increase, so do computer roompower densitiesfrom 50 Watt per square foot (540W/m2)to over 300 Watt per square foot (320W/m2). Your wholedata center just keeps getting hotter.

Hot SpotsCompounding the problem, this higher heat load is notevenly distributed throughout the room. Sometimes, powerdensities can grow into hundreds of Watt per square foot,creating localized hot spots of extreme heat.

And, They Attack Your Facility in Two Ways

50W TO 300W 600+W

ASHRAE, Datacom Equipment Power Trends andCooling Applications, 2005. American Societyof Heating, Refrigerating and Air-ConditioningEngineers, Inc.., www.ashrae.org

4Heat Load = 3 kW Per Rack Without Hot Aisle /Cold Aisle Layout

Heat Load = 6 kW Per Rack With Hot Aisle /Cold Aisle Layout

F C

100 / 38

90 / 32

80 / 27

70 / 21

60 / 16

F C

98 / 37

88 / 31

79 / 26

69 / 21

60 / 16


F C

115 / 46

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A common way to improve performance of

existing raised floor cooling applications has

been the hot aisle/cold aisle approach. In

this configuration, rows of equipment racks

are arranged in alternating "hot" and "cold"

aisles. Only the cold aisles have perforated

floor tiles that allow cool air to come up

from under the raised floor.

The Cold Aisle Is Feeling A Bit Hot

See also white paper Adaptive Cooling In The Data Center: The Roadmap For Growth at www.liebert.com

Unfortunately, even when using a hot aisle/cold aisle configuration, the limits of standard underfloor coolingare soon reached as rack heat loads increase.

Hot Aisle /Cold Aisle Approach

Side views of Computational Fluid Dynamics (CFD) by Fluent showing

limitations of hot aisle/cold aisle approach as heat load increases.

5Business continuity professionals are demanding

an integrated high heat density cooling solution

one that considers both room-level and

rack-level needs.

Effective solutions need to be flexible.

Liebert XD: The Flexible Solution

Flexibility

Floor-mount, rack-mount and ceiling-mount modules, plus a choice of cooling capacities, coverany application requirements.

Plug and play for initial installation and future growth.

Can cool more than 30 kW per rack.

Higher Availability

The Liebert XD solution assures continuous operation of critical IT systems under extreme heat conditions.

Designed to work with the hot aisle/cold aisledesign of raised floor applications by efficientlydrawing hot air out of equipment racks and moving cool air into the cold aisle.

The Liebert XD solution for high heat density cooling applications is a hybrid approach using a combination of floormount mission-critical cooling units and supplemental cooling from the Liebert XD Series.

Added as heat loads increase, supplemental

Liebert XD cooling capacity allows your facility

to adapt as heat loads rise allowing cooling

solutions to be added and reconfigured to react

to the changes in your environment.

Benefits of the Liebert XD approach include:

Lowest Total Cost of Ownership

The Liebert XD targeted cooling solution is morecost-effective than increasing the overall room airconditioning capacity using floor-mounted coolingunits only.

Total energy savings potential of up to 40% can beachieved with the Liebert XD solution.

Minimal floor space requirements allow moreroom for IT equipment.

6Open and Closed ArchitectureSystems as defined by ASHRAE

The open architecture systems utilize cooling coils near the heat load eitherinside or outside the open server rack andutilize the room air volume as a thermalstorage to ride through short power outages.

The closed architecture fully encloses the rack with the cooling coils inside. Other provisions are required for power loss ride through.

Liebert XD Pumped Refrigerant-BasedSystemsPumped refrigerant is ideal for use in data center environments. By eliminating the use of cooling water, it removes the chance of electrical hazards. It operates atlow pressure and becomes a gas at room temperatures,making it ideal for use around electronic equipment.

It utilizes micro-channel coil efficiency and low pressuredrop for lower operating costs. Use of pumped refrigerantalso saves space with smaller piping requirements and theability to utilize more compact heat exchangers.Pumped refrigerant is designed for medium to largecomputer rooms and data centers.

Liebert XD Water-Cooled SystemsLiebert XD water-cooled systems offer a cost-efficientcooling alternative where electrical hazards are minimal.They are also designed to work in any size space from asmall computer room to a large data center.

A Choice Of Cooling Methods

Flexible Approaches For High Heat Density Cooling

Adding targeted cooling is more cost-efficient than trying to lower the temperature of localizedhot spots by increasing the overall room air conditioning capacity. Liebert X-treme Densitymission-critical cooling systems are specificallydesigned to address the higher heat loads generated by tightly packed electronic rack enclosures. Individual systems can improve interior air flow, cool hot air ejected from theenclosure or cool hot spots near the racks.

No one offers you more ways to meet the challenges of cooling high heat density installations

than Liebert. We offer open and closed architectures, a choice of pumped refrigerant and

water-based cooling, and the widest range of equipment configurations to meet every need

from small communications equipment closets to the largest data centers.

7WATERBASED

PUMPEDREFRIGERANT

BASED

OPEN ARCHITECTURECLOSED ARCHITECTURE

DIRECT EXPANSION REFRIGERANT BASED

CHILLED WATER BASED

A Cooling Solution For Every High Heat Density Application

XDK-WHigh HeatDensity RackEnclosure

Liebert XDPPumping Unit

Liebert XDCRefrigerant

Chiller

XDK High Heat Density Rack Enclosure(Coming Soon)

Liebert XDOOverhead

Cooling Module

Liebert XDV Top Mounted

Cooling Module

Liebert XDHHorizontal

Row Cooler

Liebert XDCoolFrame

Module

Liebert XDP-W CoolantDistribution Unit

Liebert XDR-WRackCooler

The Liebert XD Piping system makes it easy to planand expand your Liebert XD Cooling system inresponse to a growing heat load. The key is to putthe necessary piping in place in advance and thenadd cooling units, chillers or pumping units as theneed arises for more cooling capability. The flexible connection piping allows the coolingmodules to be added or repositioned withoutinterruption in operation as needs change.

Liebert XDF High HeatDensity Rack Enclosure (Air Cooled orWater Cooled)

Liebert XDFN High HeatDensity RackEnclosure (AirCooled or WaterCooled)

Liebert XDFNHigh Heat DensityRack Enclosure(Chilled Water)

Liebert XD Cooling Solutions

8

LiebertXDP

LiebertXDC

LiebertXDO

The Overhead Cooling Solution

The ceiling-mounted Liebert XDO OverheadCooling Module mountsdirectly above the cold aisle.It draws in hot air from thehot aisle and then dischargescool air into the cold aislewhere the equipment airinlets are located. This energy-efficient unit takes up no floor space.

Pumping Unit Designed For Indirect ConfigurationApplications

When a building chilled water system is available, the Liebert XDPPumping Unit serves as an isolatinginterface between the buildingchilled water system and the pumpedrefrigerant circuit. It circulates refrigerant to the XD CoolingModules at a temperature alwaysabove the actual dew point to prevent condensation.

Liebert XD zone and spot cooling units are available in several configurations using

open or closed architecture and pumped refrigerant. Heat removal is provided

by either the Liebert XDC Refrigerant Chiller or a Liebert XDP Pumping Unit used in

conjunction with an existing building chilled water circuit.

The XD Solution StartsWith An InnovativePumped RefrigerantApplication

This unique application of anoff-the-shelf product makesthe Liebert XD solution veryenergy efficient. Pumpingrefrigerant as a liquid andallowing it to expand to a gasas it absorbs heat is overseven times as efficient as asingle phase fluid (water).The pumped refrigerantoperates at low pressure andbecomes a gas at roomtemperatures, making it idealfor use around electronicequipment.

Pumped Refrigerant-Based Approach

A Chiller DesignedFor Direct SystemConfigurations

The Liebert XDC Chiller is a speciallydesigned indoor unit that connectsdirectly to the Liebert XD CoolingModules and provides chilledpumped refrigerant circulation and control. It ensures that therefrigerant is constantly above the actual dew point in the room,eliminating concern about condensation. Available with several heat rejection options.

Open Architecture

LiebertHeat

Rejection

LiebertXDC

Refrigerant Chiller

LiebertXDC

Refrigerant Chiller

BuildingChilledWater

LiebertXDP

Pumping Unit

LiebertXDP

Pumping Unit

Pumped Refrigerant

Pumped Refrigerant

Pumped Refrigerant

Pumped Refrigerant

XD Cooling Module/Rack




Indirect system configurationDirect system configuration





LiebertHeat

Rejection

LiebertXDC

Refrigerant Chiller

LiebertXDC

Refrigerant Chiller


LiebertXDP

Pumping Unit

LiebertXDP

Pumping Unit

Pumped Refrigerant

Pumped Refrigerant

Pumped Refrigerant

Pumped Refrigerant





Indirect system configurationDirect system configuration





9Space-SavingSolution That CoolsFrom The Top

The Liebert XDV CoolingModule mounts verticallyabove or on the IT rack enclosure, drawing hot air from inside the cabinetor from the hot aisle. Itthen cools the air and discharges it down to the cold aisle. This space-saving solution requireszero floor space.

In-Row Cooling Thats Right In Line With Your Needs

The modular Liebert XDH HorizontalRow Cooler is placed directly in linewith rack enclosures. Air from the hotaisle is drawn in through the rear ofthe unit, cooled, and then dischargedthrough the front of the unit into thecold aisle. The modular and adaptivedesign of the Liebert XDH allows it tobe easily added as the demand forcooling increases.

LiebertXDH

Liebert XDCoolFrame

A Specialized Rack Cooling Solution

Liebert XD CoolFrame module is specially designed to attach directlyto the rear of the Egenera BladeFrameEX system. The Liebert XD CoolFrameallows these racks to be placed in a data center environment around other heat-generating equipment without adding to the heat load in the room. Use of the Liebert XDCoolFrame solution can promote efficient expansion of data center capacity with a minimal impact on your critical infrastructure.

LiebertXDV

Temperature F C

95 / 35

86 / 30

77 / 25

68 / 20

60 / 16

The XDO and XDV fill the cold aisle with air atthe temperature required for proper operationof the electronic equipment.

Temperature Profile of XDO System Temperature Profile of XDV System

The Liebert XD Units Enhance The Hot Aisle/Cold Aisle Approach

Liebert XDK

These high heat density server racksutilize Liebert XD pumped refrigerantand closed architecture. The server heatload is dissipated into the cooling systemthrough a heat exchanger in the bottomof the rack. Redundant high-performance fans drive closed loop aircirculation in the racks interior, whileservers are supplied with cold air at thefront of the rack. This keeps thedissipated heat from being expelled asan additional load on the IT room as isusually the case

XDK(Coming Soon)

Closed ArchitectureH

OT

AIS

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COLD

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Liebert XDV

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Liebert XDO

Side views of Computational Fluid Dynamics (CFD) by Fluent.

10

Liebert XDV System With8 kW Heat Load Per Rack

XDV ModuleAbove Rack

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ert D

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uxe

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em/3

Racks

Ceiling-MountedXDO Modules

Liebert XDV System With14 kW Heat Load Per Rack

Liebert XDV & XD0 System With 24 kW Heat Load Per Rack

XDP/XDC

XDP/XDC Units

XDP/XDC Units

PerforatedRaised

Floor Tile

XDV ModulesAbove Rack

XDV ModulesAbove Rack

Liebert XD Piping: The Key To Adaptability

The Liebert XD Piping system makes it easy to plan and expandyour Liebert XD Cooling system in response to a growing heat load.

The key is to put the necessary piping in place in advance and then add cooling units and pump unts /chillers as the need arisesfor more cooling capability.

This unique system allows the room cooling capacity to increase tomore than 500 Watt per square foot (5400W/m2) with no additionaldisruptive piping installation. The flexible connection piping alsoallows the cooling modules to be re-positioned without interruptionin operation.

Invest Now, Save In The Future Liebert XD Piping provides for future expansion and simplifies both the installation of additional units and the reconfiguration of components as needs change.

These computer room layouts illustrate howgrowth can be accommodated within thesame space by installing additional LiebertXD Cooling capacity.

Liebert XD Piping is pre-fabricated distribution piping that is installed inanticipation of a growing system, thenLiebert XD Cooling modules areadded, disconnected, or repositionedas required and are quickly made operational with flexible connectionpiping with quick-connect fittings.

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11

Open ArchitectureThe Heart of the Water-based SystemThe Liebert XDP-W Coolant PumpingUnit is the key to the performance, efficiency and space saving of the LiebertXDR-W RackCooler and Liebert XDK-Wwater- cooled rack enclosure. The unithouses the isolating heat exchangerbetween the Liebert XDR-W/XDK-W circuitfluid and building chilled water, the controlvalve, the dual redundant pumps and thesystem controls. It controls the fluidtemperature above the actual roomdewpoint. The Liebert XDP-W can be usedwith other brands of rack coolingequipment.

Liebert XDK-WUtilizing closed air circulation, theracks are completely sealed from room air. The server heat load is dissipated into the process chilledwater system through an air-to-waterheat exchanger in the bottom of therack. Redundant high-performancefans drive closed loop air circulation in the racks interior, while servers are supplied with cold air at the frontof the rack.

LiebertXDP-W

LiebertXDR-W


Closed Architecture

XDK-W

Water-Cooled Based Approach


LiebertXDP-W

Liebert XDR-W or XDK-W




Water

WaterLiebertXDP-W

Indirect system configuration

Up to 12 Liebert XDR-Wunits can be piped to eachcoolant distribution unit.

Liebert XDR-W modulesare connected via quick-connect ports to a Liebert XDP-W thatcontrols coolant flow and acts as an interfacewith your buildingschilled water systemthrough a heat exchanger.

BUILDINGCHILLED WATERLOOP

HEATEXCHANGER

2-WAY VALVE CONTROLSSECONDARY FLUID ABOVE ROOM DEWPOINT

DUALPUMPS

Hydraulic Schematic

Liebert RackCoolerThe Liebert XDR-W Rack Cooler utilizes a cooling unit that is attached tothe back door of the enclosure. Fans in the module move air from the equipmentin the rack, through a cooling coil andexpel it from the back of the unit, chilledto the point where the impact on theroom is close to neutral. This makes the Liebert XDR-W an ideal solution inapplications where the hot aisle/cold aisle arrangement is not practical. The Liebert XDR-W can be configured to eliminate hot spots or uneven heat loads within the room.

12


Direct Expansion Refrigerant Based Approach

Cooling For High Heat Density Racks In 60hZ Applications

The Liebert XDF includes integrated high capacity cooling that providesthe benefits of big room support in a cost-effective package to create anintegrated, mission-critical protection system for sensitive electronics. Advantages include:

Digital scroll compressor for continual and precise adjustments in cooling, resulting in lower energy costs.Optimized horizontal air circulation cools protected equipment, both in standard mode and in the unique backup ventilation mode. Automatic back-up ventilation feature ensures room air circulationthrough the rack in case of a failure.Control and monitoring provided through a cabinet-mounted Liebert iCOM control system, providing local and remote access tomonitoring of conditions within the enclosure.The air-cooled Liebert XDF is a fully self-contained plug-and-play rack-enclosure system that requires only an AC power connection to protect up to 36U of equipment.Water or glycol-cooled units use remote heat rejection to support the in-rack cooling system and protect up to 42U of equipment.Business-critical power protection provided through optional Liebert GXT rack-mounted UPS. Liebert MP Advanced Power Strips available to provide power control at the receptacle level.

Closed Loop Cooling For High Heat Density RacksIn 50hZ Applications

The Liebert XDFN is an integrated equipment cabinet with built in cooling, power distribution, monitoring and fire extinguishing systemoffering full redundancy and back-up ventilation. The Liebert XDFNfeatures a 42U rack that provides these advantages:

Self-contained cooling module is a modular direct expansion unitwith remote air cooled condenser or water cooled condenser.Digital scroll compressor for continual and precise adjustments incooling, resulting in lower energy costs.The modular design of Liebert XDFN allows for racks and cooling modules to be combined, in order to provide cooling to multiple racks.Back-up ventilation system ensures circulation through the rack of the air coming from the room in case of cooling module or power failureN+1 redundancy configuration utilizes one redundant coolingmodule ready to be activated in case of failure or maintenance ofone of the running units. Control and monitoring provided through a cabinet-mounted Liebert iCOM control system, providing local and remote access to monitoring of conditions within the enclosure.Business-critical power protection provided through optional Liebert GXT rack-mounted UPS. Liebert MP Advanced Power Strips available to provide power control at the receptacle level.

Liebert XDF High Heat Density

Rack Enclosure (Air Cooled or Water Cooled)

Liebert XDFN High Heat Density

Rack Enclosure (Air Cooled, Water Cooled

or Chilled Water)

Extreme density electronic equipment is turning up in many non-conventional spaces spaces without the benefit

of computer room air conditioning to provide cooling for the generated heat loads. This rack-based equipment

must be protected with the same level of air, power and physical security support as a conventional computer

room, but with the economies of scale and price in mind.

13

Pumped Refrigerant

Based vs.

Water-Based System

Comparisons

Pumped Refrigerant Based System

Advantagesn No water in data center No risk if a leak occurs n Higher energy efficiency n Smaller piping requirements

Other Considerationsn Possible compatibility issues with small rooms n Higher fluid costn Piping must be overhead

Water-Based System

Advantagesn Lower fluid cost n No limitation to room size

Other Considerationsn May require fluid treatment to prevent fouling

Open Architecture System

Advantagesn Ride-through/redundancy on room leveln Lower first cost and lower operating costn No limits on rack selectionn Plug and Play modules allow easy

capacity increases if needed later

Other Considerationsn Mainly a room or zone solution

Closed Architecture System

Advantagesn Low audible noisen Deployable as a single rackn Does not require Data Center to be in a hot

aisle/cold aisle configuration

Other Considerationsn Shorter ride-through time on cooling system loss n Fixed capacity, can not increase capacity later

Only Liebert Offers A Real Choice In Protection Solutions

The wide variety of system architecture and cooling methods offered by the Liebert XD Series means you can find

a perfect fit for any high heat density application within your data center, computer room or network closet.

Open vs. Closed

Cooling Architecture

System Comparisons

Tota

l Dat

a C

ente

r C

ost

(les

s la

nd

)($

000)

Cooling System

Data Center Cost (New Construction)

Liebert XD - Supplemental Cooling Requires less Chiller Capacity

Liebert XD - Supplemental Cooling with Lower Operating Costs

$30,000

$25,000

$20,000

$15,000

$10,000

$5,000

$0

Building Cost Less Cooling

50 W/sq.ft(500 W/m )

150 W/sq.ft(1500 W/m )

Fixed Load of 4,000 kW

400 W/sq.ft(4000 W/m )

Building Size

2 2 2

Power Usage

0.00

0.10

0.20

0.30

0.40

0.50

0.60

CW CRAC at 100% Capacity

CW CRACat 50%

Capacity

Liebert XD at 100% Capacity

Liebert XD at 50%

Capacity

kW p

ower

to c

oo

l 1 k

W o

f sen

sib

le h

eat

FanPump (XD)Pump (CW)Chiller

Chiller Capacity

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

CW CRAC Liebert XD

kW C

hill

er C

apac

ity

per

kW

O

f Sen

sib

le H

eat

Load

Latent LoadFan LoadSensible Load

15% Lower

27% Lower

32% Lower

80,000 sq.ft.8,000 m2

27,000 sq.ft.2,700 m2

10,000 sq.ft.1,000 m2

Tota

l Dat

a C

ente

r C

ost

(les

s la

nd

)($

000)

Cooling System




$30,000

$25,000

$20,000

$15,000

$10,000

$5,000

$0


50 W/sq.ft(500 W/m )

150 W/sq.ft(1500 W/m )


400 W/sq.ft(4000 W/m )

Building Size

2 2 2

Power Usage

0.50

0.60

sen

sib

le h

eat

FanPump (XD)Pump (CW)Chill

Chiller Capacity

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

CW CRAC Liebert XD

kW C

hill

er C

apac

ity

per

kW

O

f Sen

sib

le H

eat

Load


15% Lower

80,000 sq.ft.8,000 m2

27,000 sq.ft.2,700 m2

10,000 sq.ft.1,000 m2

14

Liebert XD Solutions Cut Capital Costs...

The capital costs of a data center are significantly reduced as higherdensities of IT equipment are housed in smaller sized areas.

Study Data Center Cost (New Construction) 400 racks with an averageheat load of 10 kW each. Cost for building, power, cooling, lighting, fire protection, security, etc. included. Cost of land not included.

Building 1: 80,000 sq.ft. (8000m2), 18" (450mm) Raised Floor, Designed for 50 W/sq.ft (500W/m2), Raised-floor Precision Air Conditioning units for cooling.

Building 2: 27,000 sq.ft. (2700m2), 36" (900mm) Raised Floor. Designed for 150 W/sq.ft (1500W/m2), Raised-floor Precision Air Conditioning units for cooling.

Building 3: 10,000 sq.ft. (1000m2), 18" (450mm) Raised Floor. Designed for 400 W/sq.ft (4000W/m2), Raised-floor Precision Air Conditioning units (for basic cooling and humidity control) and Liebert XD.

Investing in a facility that utilizes a higher rack density design along with a cooling system designed especially

for this type of installation offers a significant cost savings advantage in terms of building size and energy usage.

The flexible configuration of the Liebert XD system modules also allows scalability for future growth, as well as

the ability to efficiently add redundant units for maximum reliability in the most mission-critical applications.

The Liebert XD approach significantly improves floor space utilization compared to an installation using only

floor-mounted cooling units. Because of the variety of cooling module sizes and placement, installing more XD

capacity uses little or no additional floor area.

The smaller chiller plant and lower fan load result in significant energysavings as well. A 27% energy savings is very conservative.

Tota

l Dat

a C

ente

r C

ost

(les

s la

nd

)($

000)

Cooling System




$30,000

$25,000

$20,000

$15,000

$10,000

$5,000

$0


50 W/sq.ft(500 W/m )

150 W/sq.ft(1500 W/m )


400 W/sq.ft(4000 W/m )

Building Size

2 2 2

Power Usage

0.00

0.10

0.20

0.30

0.40

0.50

0.60

CW CRAC at 100% Capacity

CW CRACat 50%

Capacity

Liebert XD at 100% Capacity

Liebert XD at 50%

Capacity

kW p

ower

to c

oo

l 1 k

W o

f sen

sib

le h

eat

FanPump (XD)Pump (CW)Chiller

Chiller Capacity

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

CW CRAC Liebert XD

kW C

hill

er C

apac

ity

per

kW

O

f Sen

sib

le H

eat

Load


15% Lower

27% Lower

32% Lower

80,000 sq.ft.8,000 m2

27,000 sq.ft.2,700 m2

10,000 sq.ft.1,000 m2

One of the major areas of savings identified with the use of Liebert XD equipmentis the fact that the chiller plant size can be reduced. This is because the chillertypically is sized for the total gross capacity of the raised-floor cooling units.The 65% lower fan load of the Liebert XD System modules and the fact theyare 100% sensible easily results in a capital chiller size savings of 15% or more.

15

And Save Significant Energy Dollars

The Liebert XD CoolingSolution Saves Floor Space

Heres a typical example of how implementation

of the Liebert XD solution can impact life cycle

costs. The example compares two data center

layouts housing a total of 40 server racks with a

capacity of 16 kW each.

Raised-Floor Cooling OnlyEight 30-Ton (105 kW) Precision Air Conditioners N+2 redundancy284 Tons (998 kW) chiller plant3000 sq. ft. (300m2)

Raised-Floor And Liebert XD CoolingTwo 20-Ton (70 kW) Precision Air Conditioners and 60 zero-footprint high heat density coolingmodules 33% redundancy182 Tons (640 kW)Chiller Plant1500 sq. ft.(150m2)

Here are two solution possibilities to be considered:The raised-floor only approach of System 1 requires eight 30 Ton (105 kW) floor-mountunits (6 primary, two redundant), 3000 sq. ft. (300 m2) of raised floor space due to theneed for 6 foot (1.8m) cold aisles to handle the air flow requirements and a 284 Ton (998 kW) chiller plant.

With the raised-floor and Liebert XD cooling solution of System 2, the facility requiresonly two 20-Ton (70 kW) floor-mount units (one primary, one redundant) in half the floor space. Even with more redundancy, the chiller plant size is cut by 30% and energyconsumption reduced by 40% per year. Here are the specifics on these numbers:

The significant energy savings achievedby the Liebert XD solution are, in greatpart, due to several factors. n The cooling units are located closer to

the load, which results in less mixing ofhot and cold air.

n The fans can be optimized for a verylow total system static pressure thanksto the micro channel coils and no pressure drop losses in ducts.

Capital Cost Comparison

The sensible load is based on 40 racks times 16 kW each. But the chiller plant is sized tohandle the gross total capacity of the raised-floor units. Only six raised-floor units areused for this calculation, but the cooling units at the rating conditions of 72 (22 C)/50%humidity have a relatively high latent capacity requirement and the fan load needs to beadded back to the chiller load. The Liebert XD System hybrid approach requires 1/3 lesschiller plant capacity, also less diesel generator and switchgear capacity required. Aconservative estimate is a savings of over $60,000 in capital costs.

Capital SavingsChiller at $400 / Ton = $40,000Diesel Generator / Switchgear capacity reduction 360 kW / 450 KVA =$20,000Total Savings =$60,000

Customers are also finding they do notneed to over chill their data centers to eliminate the hot spots as they have had to do with the raised-floor coolingonly approach. They no longer need the cold aisle to be 62F (17C) in someplaces to maintain the desired 70F (21C)in other areas experiencing the hotbypass air.

Energy System 1 System 2 kW ea Qty / kW Qty / kW Savings

Chiller per Ton 0.9 284 / 256 184 / 16630 Ton CRAC 7.5 8 / 60 2 / 415 Ton CRAC 2.2 8 / 60 2 / 4Liebert XDO 0.37 20 / 7Liebert XDV 0.2 40 / 8Liebert XDP 1.7 4 / 7Total kW 316 192 124Cost / year @ $0.10 /kWhr $276,816 $168,192 $108,624Operational CostsMaintenance $6,400 $1,600 $4,800 Humidifier $5,400 $1,350 $4,050 Total Annual Savings $117,474

Total First Year Savings $184,624 10 month payback

System 1 System 2 SavingsNet Sensible Load 2,184,320 2,184,320Total Gross Load 3,405,600 2,208,500Chiller Tons Required 284 184 100 (351 kW)

XDP

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Liebert Corporation1050 Dearborn DriveP.O. Box 29186Columbus, Ohio 43229800 877 9222 Phone (U.S. & Canada Only)614 888 0246 Phone (Outside U.S.)614 841 6022 FAX

Via Leonardo Da Vinci 8Zona Industriale Tognana 35028 Piove Di Sacco (PD)Italy39 049 9719 111 Phone 39 049 5841 257 FAX

Emerson Network Power Asia Pacific7/F., Dah Sing Financial Centre108 Gloucester Rd, WanchaiHong Kong852 25722201 Phone 852 28029250 FAX

liebert.com

24 x 7 Tech Support800 222 5877 Phone614 841 6755 (outside U.S.)

Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. 2005 Emerson Electric Co.

While every precaution has been taken to ensure accuracy and completeness in this literature, Liebert Corporation assumes noresponsibility, and disclaims all liability for damages resultingfrom 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.

All names referred to are trademarks or registered trademarksof their respective owners.

Liebert and the Liebert logo are registered trademarks of the Liebert Corporation.

SL-11265 (R06/07) Printed in USA

Ensuring The High Availability OfMission-Critical Data And Applications.

Emerson Network Power, the global leader in enabling business-critical continuity,

ensures network resiliency and adaptability through a family of technologies

including Liebert power and cooling technologies that protect and support

business-critical systems. Liebert solutions employ an adaptive architecture that

responds to changes in criticality, density and capacity. Enterprises benefit

from greater IT system availability, operational flexibility, and reduced capital

equipment and operating costs.

Key Features n Increases air flow through rack

enclosures that have obstructed

air patternn Redundant fans and dual power

feeds for continuous availability.n Gives maximum uptime by

providing redundancy and

continuous availability through

dual power feeds (A and B).n Two available mounts per rack,

inside or outn Compatible with most rack

enclosuresn Perfect in combination with

Liebert Deluxe unitsn Complete kit includes:

n XDA assembly (fans, dual

power cords & main switch).n Assembly positioning tooln Cable grommetn Excess door perforation

covering

Easily-Installed Fan Unit Increases Enclosure Air FlowLiebert XDA Air Flow Enhancer

Liebert XDA Air Flow Enhancer increases

the air flow through densely populated

enclosures, past congested cabling,

removing hot spots within the enclosure

that can threaten the uptime of your

critical systems.

Server fans often produce

insufficient flow to push air through

the masses of data communication

wiring at the rear of the enclosure.

But with a Liebert XDA placed on the

exhaust side of the enclosure, the

five high-static fans ensure positive

air flow, moving heat out of the

enclosure and into the room where

it can be removed by the room air

conditioning system.

Each unit is rated for 1000 CFM

(@60Hz). The unit mounts on the

rear (inside or outside) of any

standard rack (minimum 60" height).

Two XDA units mounted side by

side on the rear of a rack enclosure

(2000 CFM capacity) move a nominal

14 KW heat load.

Liebert XDA features dual power

cords for continuous availability.

They are easy to install and

compatible with most rack

enclosures.

Precision Coolingfor Business-Critical Continuity




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While every precaution has been taken to ensure accuracy and completeness in this literature, Liebert Corporation assumesno responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions.


All names referred to are trademarks or registered trademarks of their respective owners.



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AC Power SystemsConnectivityDC Power SystemsEmbedded PowerInbound PowerIntegrated Cabinet SolutionsOutside PlantPrecision CoolingSite Monitoring and Services

Emerson Network Power and the EmersonNetwork Power logo are trademarks andservice marks of Emerson Electric Co. 2005 Emerson Electric Co.

Technical Data

Nominal Capacity 1000 CFMInput Voltage 120 V, 1 , 60 Hz

230 V, 1 ,50/60 HzFull load amps 1.5 A @ 120 VHeight 56"Width 8"Depth 2.25"Weight, unit only 27 lbs


Specifically Designed To Support The Modules In The Liebert XD SystemLiebert XDC Refrigerant Chiller

The Liebert XDC Refrigerant Chiller is a part of Lieberts highlyenergy-efficient high heat density cooling system Liebert XD.

The system can cool more than 30kW per rack and

uses pumped refrigerant, which is ideal for use around

electronic equipment.

Liebert XDC is specifically designed to support the

Liebert XDO, XDV, XDH and CoolFrame modules. The

XDC is an indoor unit that connects directly to the XD

cooling modules and it provides refrigerant circulation

and control while maintaining the refrigerant at a

temperature always above the actual dewpoint.

The packaged unit includes Enclosure, Pumps, Heat

Exchanger, Scroll Compressors, Receiver Tank, Controls,

Valves and Piping. The XDC is available in an air cooled

configuration with remote condenser.

Key Features n Energy Efficientn Floor Space Efficientn Scalablen Easy to Install

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Technical Data

Nominal Capacity, 60 Hz 160 kW / 46 TonNominal Capacity, 50 Hz 130 kW / 37 TonInput Voltage 460 V, 3 ph, 60 Hz

380/415 V, 3 ph, 50 HzFull load amps 79 AHeight 78 (1981 mm)Width 74 (1879 mm)Depth 34 5/8 (879mm)Weight, empty 1800 lbs (817 kg)

The indoor Liebert Refrigerant Chiller is specifically designed to

support the Liebert XD cooling modules. The XDC connects

directly to the modules through the pumped refrigerant.

When a building chilled water system is available, the Liebert XDP

Pumping Unit is utilized as an interface between the pumped

refrigerant circuit and the chilled water system. Both the XDC

and the XDP units circulate the refrigerant to the XD modules,

while maintaining the refrigerant at a temperature always above

the actual dewpoint.

Liebert XD Hydraulic System Schematic






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LiebertHeat

Rejection

LiebertXDC

Refrigerant Chiller

LiebertXDC

Refrigerant Chiller

PumpedRefrigerant

PumpedRefrigerant





Direct system configuration


LiebertXDP

LiebertXDP

PumpedRefrigerant

PumpedRefrigerant







Liebert XDFRack Enclosure With Integrated High Density Cooling

Extreme density electronic equipment is turning up in many non-traditional spaces

spaces without the benefit of computer room air conditioning to provide cooling

for the generated heat loads. This rack-based equipment must be protected with the

same level of air, power and security support as a conventional computer room, but

with the economies of scale and price in mind.

Key Features n Integrated high density cooling

with horizontal air flown Automatic back-up ventilation n 2 Configurations:

n Air Cooled, Self Contained with

integrated condensern Water Cooled

n Digital scroll compressor

for precise and energy-

efficient operationn Quickly deployablen Liebert iCOM intelligent

controlsn Remote monitoringn Compatible with Liebert

rackmount UPS and power strips

Ideal Applicationsn High density equipment

requiring individualized

cooling and protection:n Warehousesn Small computer roomsn Closets and sheltersn Data centers

n RFIDn VolPn Disaster recovery operations

Liebert XDF is high density

cooling integrated into a secured

rack enclosure, providing the

benefits of big room support in a

cost-effective package. Optimized

horizontal air circulation cools the

protected equipment, both in

standard mode and in backup

ventilation mode. Control and

monitoring are accomplished

with the cabinet-mounted Liebert

iCOM control system. In addition,

optional Liebert UPS, advanced

power strips and remote

monitoring systems are available

to customize the level of support

to individual equipment needs.

Air Cooled, Self Contained version, Front Water Cooled

Air Cooled, Self Contained version,With Open Side Panel






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Condenser Fan

EvaporatorFans

Digital ScrollCompressor

Power CordConnections

EvaporatorCoil

Air InletDamper

Air ExitDamper

GraphicControlDisplay

Technical Data

Liebert XDF Air Cooled, Water CooledSelf Contained

Overall Unit Height, With Casters 82.5" (2095mm) 82.5" (2095mm)

Overall Unit Width 35" (890mm) 35" (890mm)

Overall Unit Depth, Footprint 48" (1219mm) 48" (1219mm)

Rack Width 19" (483mm) EIA 19" (483mm) EIA

Rack Height 36U 42U

Adjustable Rack Depth, Max 32.1" (815mm) 32.1" (815mm)

Adjustable Rack Depth, Min 24.4" (620mm) 24.4" (620mm)

Weight, empty 800 lbs (360 kg) 750 lbs (338 kg)

Max Weight Filled 2000 lbs (907kg) 2000 lbs (907kg)

Sound Power Level 86 dBA 79 dBA

Nominal Cooling Capacity*** 14.4 kW (4.1Ton) 14.4 kW (4.1Ton)

Nominal Air Flow 2100 CFM (3500 m3/h) 2100 CFM (3500 m3/h)

Input Voltage 120V, 1ph, 60Hz* and 208V, 3ph, 60Hz**

Full Load Amps 7.7A* and 15.7A** 5.0A* and 15.7A**respectively, 60Hz respectively, 60Hz

Local and Remote Monitoring Capabilities

iCOM allows for local or remote monitoring of the

conditions in the Liebert XDF to protect critical rack compo-

nents. Options are available for connecting to

Liebert remote monitoring devices or for BMS (Building

Management System) interface via MODbus or SNMP.

The menu driven display is organized into three main sec-

tions: User Menus, Service Menus and Advanced Menus.

iCOM Control Display

Standard Mode (SelfContained Unit Shown)

Back-Up Ventilation Mode(Self Contained Unit Shown)

Front Rear

* For controls and evaporator and condenser fans power supply.** For compressor power supply

*** At rating 95F amb, 77F supply air to load


The modular, Liebert XDH Horizontal Row

Cooler provides efficient and economical

cooling for high heat density equipment.

The Liebert XDH is placed in line with rack

enclosures and air from the hot aisle is

drawn in through the rear of the unit,

cooled, and discharged into the cold aisle

where the electronic equipment air inlets

are located. The Liebert XDH draws

directly from the hot aisle, allowing the

unit to take advantage of higher heat

transfer efficiency.

The Liebert XDH is a part of our highheat-density cooling product familythat utilizes pumped refrigeranttechnology.The pumped refrigerantoperates at low pressure in the systemand becomes a gas at roomconditions, making it ideal for usearound electronic equipment.

Since the Liebert XD system alwaysprovides 100% sensible capacity, theneed for humidification is significantlyreduced, further reducing energy usage and maintenance.

The modular and adaptive design of the Liebert XDH unit also allows it to be easily added as the demand forcooling increases.

The Liebert XDH Offers Many Benefits:

Reliability:Can cool more than 30 kW

per rack.

Dual (A and B) detachable power

cords for increased uptime.

Uses pumped refrigerant

which is ideal for use around

electronic equipment.

Two pumped refrigerant circuits.

Flexibility:Complements Liebert precision

cooling units.

Optional pre-charged flexible

piping with threaded quick

connect fittings allows adaptive

and scalable expansion without

interruption of cooling operations.

Flexible installation.

Complete packaged unit includes

enclosure, coils, controls, fans

and piping.

Low Total Cost Of Ownership:Superior cost for cooling per high

heat density rack.

Highly energy efficient.

Liebert XDH Horizontal Row CoolerCooling For High Heat Density Equipment









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Liebert XDH SpecificationsModel Size XDH20 XDH32Nominal Capacity, 60 Hz1 22 kW /6.3 Ton 30 kW / 8.5 TonNominal Capacity, 50 Hz 2 19 kW /5.4 Ton 27 kW / 7.7 TonNominal Airflow, 60 Hz 2500 CFM (4200 m3/h) 4000 CFM (6800 m3/h) Nominal Airflow, 50 Hz 2100 CFM (3500 m3/h) 3300 CFM (5600 m3/h)Input Voltage 120 V, 1 ph, 60 Hz

230 V, 1 ph, 50 HzPower Draw 500 W 1200 WFull load amps 4.2 A @ 120V 10.5 A @ 120VNumber of Fans 6Sound Power Level 81 dBA 86 dBAHeight (unit only) 78 (1982 mm)Width 12 (300 mm)Depth 42 (1066 mm)Weight 246 lbs (112 kg)Options Quick Connect Couplings (for Flexible Piping)

Condensate Detection (dry contacts)Diffuser for front air discharge to both sides or to one side.

1 Nominal Capacity Rating @ 55F (13C) Entering Fluid Temperature and 98F (37C) Entering Air Temperature. Max Capacity @ 55F (13C) EFT and 105F (40C) EAT is 25.5 kW and 34.5 kW, respectively.

2 Nominal Capacity Rating @ 55F (13C) Entering Fluid Temperature and 98F (37C) Entering Air Temperature. Max Capacity @ 55F (13C) EFT and 116F (47C) EAT is 25.5 kW for XDH20 and 34.5 kW @ 108F (42C) EAT for XDH32.

Building Chilled Water Liebert

XDPPumped Refrigerant

Liebert XD ModulesLiebert

XDP

Liebert Heat

Rejection

Pumped Refrigerant

Liebert XDC

Liebert XD Modules

Direct System

Indirect System

The indoor Liebert XDC RefrigerantChiller is specifically designed tosupport Liebert XD cooling modules.The Liebert XDC connects directly to the XD Modules.

When a building chilled watersystem is available, the Liebert XDPPumping Unit is utilized as aninterface between the pumpedrefrigerant circuit and the chilledwater system.

Both the Liebert XDC and the XDPunits circulate the refrigerant toLiebert XD units, while maintainingthe refrigerant at a temperaturealways above the actual dewpoint.


Liebert XDO Overhead Cooling ModuleSensible Spot And Zone Cooling For High Heat Density Equipment

Flexibility: n Can cool more than

500 W/sq.ft. (5400 W/m2).n No floor space required.n Complements the cooling of

Liebert precision cooling units.n Excellent for spot and

zone cooling.n Scalable.n Flexible installation with

several connection possibilities.n Optional pre-charged flexible

piping with threaded quick-

connect fittings allows adaptive

and scalable expansion without

interruption of cooling operations.n Possible to be fully installed

from an existing cold aisle

without the need for reaching

over existing racks.

Higher Availability:n Uses pumped refrigerant,

which is ideal for use around

electronic equipment.n Complete packaged unit includes

enclosure, coils, fan and piping.

Lowest Total CostOf Ownership:n Superior cost for cooling per high

heat density rack.n Highly Energy Efficient.

The ceiling mounted Liebert XDO

overhead cooling module provides

sensible spot and zone cooling for

high heat density equipment.

The Liebert XDO draws in hot air through two

opposite inlets and discharges cool air down into the

cold aisle where the electronic equipment air inlets are

located. This flexible, scalable and space saving product

mounts to the ceiling requiring zero floor space.

The Liebert XDO is a part of our high heat-density

cooling product family that utilizes pumped refrigerant

technology. The pumped refrigerant operates at low

pressure in the system and becomes a gas at room

conditions, making it ideal for use around electronic

equipment. Since the Liebert XDO always provides

100% sensible capacity, the need for humidification

is significantly reduced, further reducing energy

usage and maintenance.






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Technical DataXDO16 XDO20

Nominal Capacity, 60 Hz1 17.2 kW / 5 Ton 20 kW / 5.7 Ton Nominal Capacity, 50 Hz1 17.1 kW / 4.9 Ton 17.7 kW / 5 TonNominal Airflow, 60Hz 2700 CFM (4590 m3/h)Nominal Airflow, 50Hz 2250 CFM (3820 m3/h)Input Voltage 120 V, 1 ph, 60 Hz

220-240 V, 1 ph, 50/60 HzFull load amps 2.7A @ 120V, 1ph, 60 Hz

1.5A @ 230V, 1ph, 50 HzAudible Noise, 60 Hz / 50 Hz 85 dBa / 83 dBa Sound PowerHeight, module only 22.5 (572 mm)Width 72.0 (1829 mm)Depth 24 (610 mm)Weight, empty 150 lbs (68 kg)Options Condensate Detection (dry contacts)

Quick Connect Couplings (for Flexible Piping)

HO

T A

ISLE

COLD

AIS

LE

HO

T A

ISLE

COLD

AIS

LE

HO

T A

ISLE

The Liebert XDO systems work extremely well with the "hot aisle-cold aisle" approach.

BuildingChilledWater Pumped

Refrigerant

LiebertXDO

Pumped Refrigerant

LiebertXDO

LiebertXDO

Liebert XDP

Liebert XDP

The indoor Liebert XDC refrigerant chiller isspecifically designed to support Liebert XDcooling modules. The Liebert XDC connectsdirectly to the XD modules.

When a building chilled water system isavailable, the Liebert XDP pumping unit is utilized as an interface between thepumped refrigerant circuit and the chilledwater system.

Both the Liebert XDC and the XDP unitscirculate the refrigerant to Liebert XD units, while maintaining the refrigerant at a temperature always above the actual dewpoint.

Liebert Heat

Rejection

Pumped Refrigerant Liebert XDO

Liebert XDCRefrigerant

Chiller

Liebert XDO

Direct System

Indirect System


1Nominal Capacity Rating is @ 55F (13C) Entering Fluid Temperature and 92F (33C) Entering Air Temperature.Max capacity 60Hz: XDO16 - 17.2kW @ 90 F (32 C), XDO20 - 23kW @ 100 F (38 C)Max capacity 50Hz: XDO16 - 17.2kW @ 93 F (34 C), XDO20 - 23kW @ 103 F (39 C)


The Liebert XDP Pumping Unit is part of the the highly energy-efficient, high heat density Liebert XD cooling system.

The system can cool more than 30 kW per rack and

utilizes pumped refrigerant, which is ideal for use

around electronic equipment. Liebert XDP is specifically

designed to support the Liebert XDO, XDV, XDH and

CoolFrame modules. The XDP is an interface between

the pumped refrigerant circuit and the building chilled

water system. The XDP circulates the refrigerant to the

Liebert XDV modules while maintaining the refrigerant

at a temperature always above the actual dewpoint.

The packaged unit includes Enclosure, Pumps, Heat

Exchanger, Receiver Tank, Controls, Valves and Piping.

Key Features n Energy Efficientn Redundant Pumpsn Floor Space Efficientn Scalablen Easy to Install

Specifically Designed To Support The Modules In The Liebert XD SystemLiebert XDP Pumping Unit

Technical Data

Nominal Capacity, 60 Hz 160 kW / 46 TonNominal Capacity, 50 Hz, 140 kW / 40 TonInput Voltage 208 V, 3 ph, 60 Hz

460 V, 3 ph, 60 Hz380/415 V, 3 ph, 50 Hz

Full load amps 2.1 A @ 460 V, 3 ph, 60 Hz2.3 A @ 380/420 V, 3 ph, 50 Hz

Height 78 (1981mm)Width 38 (965mm)Depth 34 (864mm)Weight, empty 821 lbs (372 kg)

The indoor Liebert XDC Refrigerant Chiller is specifically designed to

support the Liebert XD cooling modules. The XDC connects directly to

the modules through the pumped refrigerant circuit.

When a building chilled water system is available, the Liebert XDP

Pumping Unit is utilized as an interface between the pumped refrigerant

circuit and the chilled water system. Both the XDC and the XDP units

circulate the refrigerant to the XD modules, while maintaining the

refrigerant at a temperature always above the actual dewpoint.










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LiebertHeat

Rejection

LiebertXDC

Refrigerant Chiller

LiebertXDC

Refrigerant Chiller

PumpedRefrigerant

PumpedRefrigerant





Direct system configuration


LiebertXDP

LiebertXDP

PumpedRefrigerant

PumpedRefrigerant







Liebert XDV Vertical Top Cooling ModuleSensible Spot And Zone Cooling For High Heat Density Equipment

Flexibility:n Can cool more than 10 kW per rack.n No floor space required.n Complements Liebert precision cooling units.n Optional pre-charged flexible piping with threaded

quick connect fitting allows adaptive and scalableexpansion without interruption of cooling operations.

n Flexible installation mounts on top of the cabinet or suspended from the ceiling.

n Excellent for spot and zone cooling.

Higher Availability:n Uses pumped refrigerant, which is ideal for use around

electronic equipment.n Dual (A and B) detachable power cords for

increased uptime.n Complete packaged unit includes enclosure, coil,

controls, fans and piping.

Lowest Total Cost Of Ownership: n Highly Energy Efficient.n Superior cost for cooling per high heat density rack.

The Liebert XDV top-mounted cooling module provides sensiblespot and zone cooling for high heat density equipment.

This flexible, scalable and space saving product mounts

on top of the cabinet or suspended from the ceiling,

requiring zero floor space. The modular and adaptive

design of the Liebert XDV unit also allows it to be easily

added as the demand for cooling increases.

It can either draw in hot air directly from inside the

cabinet or from the hot aisle, and discharge cool air

down into the cold aisle where the electronic

equipment air inlets are located

The Liebert XDV is a part of our high heat-density

cooling product family that utilizes pumped refrigerant

technology. The pumped refrigerant operates at low

pressure in the system and becomes a gas at room

conditions, making it ideal for use around electronic

equipment. Since the Liebert XD system always

provides 100% sensible capacity, the need for

humidification is significantly reduced, further

reducing energy usage and maintenance.

BuildingChilledWater Pumped

Refrigerant

LiebertXDV

Pumped Refrigerant

LiebertXDV

LiebertXDV

Liebert XDP

Liebert XDP

Technical DataXDV8 XDV10

Nominal Capacity, 60 Hz1 8.8 kW / 2.5 Ton 10 kW / 2.8 TonNominal Capacity, 50 Hz1 8 kW / 2.3 Ton 8 kW / 2.3 TonNominal Airflow, 60 Hz 1000 CFM (1700 m3/h)Nominal Airflow, 50 Hz 830 CFM (1410 m3/h)Input Voltage 120 V, 1 ph, 60 Hz

230 V, 1 ph, 50/60 HzFull load amps 2A @ 120V, 1ph, 60 Hz

1A @ 230V, 1ph, 50 HzAudible Noise, 60 Hz / 50 Hz 78 dBa / 73 dBa Sound PowerHeight, module only 14 (355 mm)Width 23 (581 mm)Depth 29.5-39.5 (749-1003 mm)Weight, empty 77 lbs (35 kg)Options Quick Connect Couplings (for Flexible Piping)

Condensate Detection (dry contacts)1 Nominal Capacity Rating is @ 55F (13C) Entering Fluid Temperature and 98F (37C) Entering Air Temperature.

Max capacity 60Hz: XDV8 - 8.8kW @ 95 F (35 C), XDV10 - 11.8kW @ 106 F (41 C)Max capacity 50Hz: XDV8 - 8.8kW @ 103 F (39 C), XDV10 - 11.8kW @ 116 F (47 C)

The indoor Liebert XDC refrigerant chiller isspecifically designed to support the LiebertXD cooling modules. The Liebert XDCconnects directly to the XD modules.

When a building chilled water system isavailable, the Liebert XDP pumping unit is utilized as an interface between thepumped refrigerant circuit and the chilledwater system.

Both the Liebert XDC and the XDP unitscirculate the refrigerant to Liebert XD units, while maintaining the refrigerant at a temperature always above the actualdewpoint.

Liebert Heat

Rejection

Pumped Refrigerant Liebert XDV

Liebert XDC Refrigerant

Chiller

Liebert XDV

Direct System

Indirect System


HO

T A

ISLE

COLD

AIS

LE

COLD

AIS

LE

HO

T A

ISLE

The Liebert XDV works extremely well with the hot aisle-cold aisle approach.

HO

T A

ISLE




Liebert is a registered trademark of the Liebert Corporation.


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Liebert ChallengerUnmatched Environmental Control To Match Many Applications

2When It Comes To Precision Air Conditioning,Liebert Doesnt Accept Almost

Although sensitive equipment can leave the computerroom, it cant leave the environmental protection behind.Electronics are susceptible to heat, humidity, and airbornedust and contaminants. These systems require precision air conditioning to prevent downtime due to:

Equipment shutdown or mechanical failure.Temperature fluctuations can cause equipment toexhibit random errors and premature mechanical failure.Low humidity static discharge can alter data and maydestroy electronic components.High humidity can accelerate the deterioration ofmagnetic media, cause paper to swell and jam in printers,and leads to deterioration from condensation.

The choice is simple: provide precision air conditioning or risk significant levels of downtime.

But configuration of air conditioning is not so simple.

Sensitive computer-based electronics are no longer restricted

to computer room glass house environments. Todays

computers manage complex telecommunications networks,

optimize industrial systems, process sophisticated medical

and laboratory information, and control LANs and WANs.

3Liebert Challenger includes all environmental functionscooling, reheat, dehumidification,

humidification, and filtrationand an intelligent control system to make sure every

function works in harmony with the other. Installation is fast, and maintenance is easy.

All systems are factory tested.

Designed to run 24 hours a day, 365 days a year. The inherently efficient scroll compressor

has an EER of 11.3. Liebert Microprocessor-based controls intelligently determine

operational requirements and minimize wasteful operating patterns such as short cycling.

Optional GLYCOOL free-cooling system permits compressorless operation in cold climates.

The Liebert Challenger is a self-contained system.The status and control panel is on the

front, and all control functions are menu-driven. You have complete control of your

environment at all times.

Footprint is a mere 7.3 square feet, with front access to all interior components for

maintenance and service. Theres no need to keep the back or sides clear, so the Liebert

Challenger can fit into a corner or squeeze between existing installed equipment.

Liebert Challenger is the most versatile system available. It can be placed inside the

room, or remotely. Conditioned air can move up into ducts or down into a raised

floor plenum. Self-contained or split systems. Air, water, glycol, GLYCOOL, and chilled

water configurations.

I need a cooling source I can controlthat is totally independent of thebuilding HVAC system.

My equipment will be running continuously, so the air conditioner needs to be energy efficient.

That room is jammed to the rafters; I need a cooling system that takes very little space.

I want everything in one cabinetfrom one supplier.

There are a dozen sites here, all unique. I want to simplify my selection process without compromising my site needs.

The Complete Solution

4Medical and Laboratory Applications Need:

Large Load VariationsHigh Air Filtration RequirementsMinimal Floorspace

Labs and Medical suites such as MRI and CATscan sitesneed to handle cooling loads precisely and quietly. The Liebert Challenger offers such precision features asIntelligent, microprocessor based control systems, SCR controlled reheats for infinite levels of response, an A-Frame coil that reduces air turbulence and a quiet,dependable scroll compressor. All in a compact packagethat fits easily into any setting.

Years of experience in the design and manufacture of precision environmental control systems and staying abreast of new

technological developments and requirements has helped us produce the Liebert Liebert Challenger. We know that all critical

electronic systems demand a high quality environment...but we also know that not all applications are created equal. Thats

why Liebert Challenger is configurable to meet the needs of a wide variety of site requirements.

Network Closet And TelecomApplications Need:

Unattended SitesMinimal FloorspaceContinuous Operation

In Telecommunications sites, space is at a premium. And you need a system dependable to operate yearround in unattended sites. The Liebert Challenger features a reliable scroll compressor, remote communications capability, and a microprocessor that controls the system without supervision. And it provides all this protection while consuming only 7.3 square feet.

Regardless Of The Application, Liebert ChallengerWill Meet Your Critical Requirements.

5Industrial Process AutomationApplications Need:

Potentially Corrosive EnvironmentsHigh Static Pressure AirDischarge RequirementsHigh Air Filtration Requirements

On the factory floor, you need a cooling system thatsdependable and tough. Tough enough to withstand the corrosive environments, and tough enough to supply continuous air flow in ducted applications. The Liebert Challenger answers all this with a MIG welded steelframe surrounded by insulated heavy gauge steel panels.

Computer Room Applications Need:

24 Hour Per Day/365 Days Per Year OperationUnderfloor Air DischargeHigh Sensible Heat Ratio1800-3000 C.F.M. Air DischargeHigh Energy Efficiency Requirements

On a square foot basis, computer rooms generate up to five times the heat of normal office space. And theyrequire higher than normal air handling requirements to reduce hot spots. The Liebert Challenger is designedto handle this load efficiently with a high sensible heatratio and an air delivery system capable of 1800-3000C.F.M. Because most computer rooms use a raised floorfor air circulation and cable management, the LiebertChallenger can be specified with underfloor air discharge. This reduces the turbulence created by competing warm and cold air streams.

6Front Access For EasyMaintenanceAll interior components are frontaccessible to simplify maintenanceand reduce the floorspace that mustbe kept open.

Stable and QuietA MIG welded steel frame provides a solid platform for the internal components. Units incorporate avibration-isolated fan deck whichreduces noise and vibration transmission to any connected ductwork. The heavy gaugepanels/heavy duty gaskets option provides upgraded protection, popular in industrial and/or high static applications.

Corrosion ResistantThe frame and exterior panels are powder coated and baked, a solvent-free process that is not onlyenvironmentally safe, but produces an attractive, durable finish.

Precise Humidity ControlThe Infrared Humidifier has been a feature on Liebert environmentalcontrol systems for over 25 years. Its rapid response and cleanliness has made it an industry standard in applications that demand precise, particle-free humidity control.

More Benefits And Higher Quality...Trademarks Of A Liebert System

An Autoflush System reduces thebuildup of mineral solids and reducesmaintenance time. If your applicationcalls for a Steam-GeneratingHumidifier, Liebert can respond. The disposable canister makes maintenance quick and easy.

High Performance Coolingand Heating ComponentsAn A-Frame Evaporator Coil exposes more coil surface to the airthat passes through it. This not onlyprovides a more rapid and preciseresponse to changing room conditions, but it reduces the horsepower requirements of the fan motor, saving energy.

The 304/304 Stainless Steel, FinnedTube Reheat, like the evaporator coil,is designed to maximize surface area.This allows lower sheath temperatures,reducing the likelihood of ionizationthat could trip fire detection equipment,and more precisely controlling room temperature during dehumidification.The reheat coils are constructed ofstainless steel for corrosion resistanceand long life.

An optional SCR-Controlled Reheat is available that provides infinite response levels to changingroom temperatures.

Year-Round DependabilityAnd Energy EfficiencyA rugged and quiet ScrollCompressor is at the heart of therefrigeration system. It operates atone of the highest EERs in the industry, 11.3.

Air cooled systems with outdoorcondenser can operate between -30 and +120F (-34 and 49C).Water and glycol cooled systems feature a coaxial condenser and regulating valves that can be adjusted to meet the capabilities of the site.

All Components From OneManufacturerLiebert is the only manufacturer in thecomputer support industry that buildsits own condensers and drycoolers.They feature aluminum cabinets andcopper-tube, aluminum-fin coils, andare built to precisely match the heatrejection requirements of the LiebertChallenger .

NRTL-C Certified Standard 60Hz products are NRTL-C listed/certified. NRTL-C meets bothU.S. and Canadian government safety standards, providing fast, hassle-free inspection and buildingcode approval.

7The GLYCOOL system is a patentedLiebert process that allows colder

outdoor temperatures to reduce or

eliminate compressor operation.

This not only reduces operating

costs,it increases reliability.

How it works:When outdoor temperatures are

above room temperature, the

GLYCOOL Liebert Challenger

functions as a normally-cooled

system. But when outdoor

temperatures fall below room

temperatures, the glycol that

circulates between the condenser

and drycooler becomes cold

enough to provide some or all

of the rooms cooling needs.

The cold glycol is redirected to a

supplemental cooling coil by means

of a microprocessor controlled valve.

During outdoor temperatures

below 45F (7.2C), the circulating

glycol can provide the same

cooling capacity as the mechanical

refrigeration system.

For Ultimate EnergyEfficiency: GLYCOOL

InfraredHumidifierFor PreciseHumidityControl

A-FrameEvaporator Coil

Stainless SteelFinned-TubeReheat

Corrosion-ResistantSteel Frame

ScrollCompressor

Front Access ForEasy Maintenance

Vibration-IsolatedFan Deck

Liebert Commitment to Quality All Liebert products available in the marketplace are the results of exhaustive testing. Our state-of-the-arttesting laboratory is the most complete in the industry. Products are tested under both indoor and strenuousoutdoor conditions to insure year round reliability. All electronic components are subjected to rigorous life-cycle testing far in excess of normal operating stresses. In short, you can be sure that a Liebert productnot only will help you solve your unique environmental control problems...it will help you solve them right.

8Communicating With Your Precision Environmental System

Liebert Advanced Microprocessor Control

This control system automatically selects the most

precise and efficient action based on the environmental

trends of your site. The Liebert Advanced Microprocessor

Control uses an LCD display and a five-key pad to program

setpoints and alarms. The menu-driven system monitors a

wealth of data digital and analog to keep you constantly

informed of system operation. Features include:

Backlit display panel that shows room conditions and

operational status in normal mode.

Event logging that shows alarm history and run time log.

Choice of four custom alarms with inputs allowing external

20mA analog signals for water and similar external alarms.

Proportional control system.

Programmable temperature and humidity setpoints

and alarm conditions.

Auto restart.

Local alarm.

Compatibility with Liebert remote monitoring and

control devices.

In the alarm mode, the control panel candisplay any of up to 21 alarms.

Liebert Advanced Microprocessor

Control With Graphics

The Liebert Advanced Microprocessor Control with Graphics

offers the same features and control schemes as the Advanced

system. However, this model adds a 240x128 pixel backlit dot

matrix display that provides data at-a-glance screens for quick

review. Additional features include expanded alarm capabilities

and in-depth system operating information. The system offers

graphic representations of:

Temperature, humidity and analog inputs.

Component operating status by hour.

System operating status.

The standard operations screen shows temperatureand humidity in large, easy-to-read type.

Whether you use its local or remote monitoring and control capabilities, the Liebert Challenger is designed to provide the

widest range of monitoring options.

Local Monitoring And ControlAside from streamlining your operation for peak performance, microprocessor-based controls help the LiebertChallenger achieve precise temperature and humidity for your sensitive electronics. Two levels of Liebert microprocessor control systems are available, providing precise control and monitoring of the critical space. The Liebert Advanced Microprocessor is standard, while the Liebert Advanced Microprocessor with Graphics isoptional. These controls provide unit control, monitoring, diagnostics, alarms and event logging.

9Network MonitoringSystemsThe Liebert OpenComms family of productsleverages one-to-one unit connections andyour existing network for a comprehensivemonitoring solution for distributed equipment.

Liebert OpenComms NformCentralized monitoring of all Liebert SNMPenabled devices.Event and alarm management.Adaptable and configurable graphical user interface.Integration of third-party SNMP enableddevices through custom Liebert services.Windows NT, 2000 and XP compatible.

Liebert OpenComms NICMonitoring option available for Liebert precision air conditioning units. Web interface for viewing and control.Modbus interface for building management systems.Liebert SNMP interface for network management systems.

Stand-Alone MonitoringAnd Leak DetectionSolutions Autonomous Liebert microprocessor controlled modules are available to provide supervision,control and remote notification of Liebert equipment. These stand-alone devices include:

Contact Closure Alarm PanelsContinuously monitor critical support equipment and instantly notify on alarm condition.

Liebert Control PanelsSequence the operation of multiple environmental units.

Liebert Leak Detection ModulesProvide quick detection and location of hazardous fluid leaks.

Discrete Output Interface CardStraightforward way to tie environmental units to a building management system or alarm panel.

Enterprise Monitoring SystemsLiebert SiteScan Web is a comprehensive critical systems monitoring solution dedicatedto ensur

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