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Precision CoolingFor Business-Critical Continuity

Liebert : The Right Cooling For IT Environments


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New Challenges To IT System Uptime

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Many IT pro essionals are fnding that dedicated

precision cooling is the right solution to provide the

ideal environment or sensitive electronics. Dedicated

cooling o ers the year-round operation, tight

temperature and humidity control and air volumesrequired or optimal per ormance o IT equipment.

As IT systems increase in power density, they generatemore heat. Building air conditioning systems used orremoving heat in IT spaces may no longer be optimal ortodays hotter equipment.

Many existing IT spaces have little or no ventilation andinsu cient cooling. As a result, lack o su cient coolinghas become a constraint to IT equipment upgradesand expansion.

The Need For Reliable CoolingDesigned or continuous, year-round operation, precisioncooling controls temperature and humidity within thetight ranges recommended or IT equipment. This helpsto ensure the highest per ormance o equipment andextends its li espan.

Precision cooling is cost-competitive against building airconditioning and has a ast payback. Through the use o new technology such as Digital Scroll compressors andhigh level electronic control systems, precision coolingalso does more with less energy than standard buildingair conditioning.

The Shortcomings Of StandardBuilding Air ConditioningStandard building air conditioning equipment is designedto cool people, spending considerable energy on removingmoisture as it removes heat. This can result in air that is toodry or IT equipment, raising the risk o static electricity.Furthermore, building systems are more expensive tooperate, requiring more capacity to remove the sameamount o dry heat rom an IT environment. Precisionsystems move 40% more air to eliminate hot spots andprovide better cooling or IT equipment racks.

100%

65%

100%90%

Comfort A/CCapacity

Total

Latent

Sensible

Precision A/CCapacity

Computers generate heat, but not humidity.

Thats why about 95% o a Liebert precision cooling systemsenergy and capacity are designed to remove the dry heat thatelectronic equipment produces. Building systems are designedto keep people com ortable and are only capable o usingabout 60% o their cooling capacity to remove heat generatedby computers. The other 40% is used to remove moisture,commonly ound in o ce spaces, but not server or networkrooms. This can lower humidity too much in IT equipmentrooms, causing static problems and even electronic ailures.


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Comparing The Costs O CoolingYour IT Environment

While the initial cost o a building air conditioning system may

be less than a precision system, comparing the cost o operationreveals a much di erent story:

Com ort cooling systems require the airconditioning equipment and a separate humidi erunit. Liebert precision cooling systems contain bothin one unit.Precision systems utilize the latest energy savingtechnology to o er higher e ciency thancom ort systems.

Precision systems are built with heavy-dutycomponents not ound in com ort system and aredesigned to acilitate maintenance when required.

Precision cooling o ers a range o models designedto take up a minimum amount o foor space in datacenters and equipment rooms.

Precision cooling systems are designed or 24 x 7

operation to minimize downtime. Com ortsystems are only engineered to operate duringbusiness hours.

Get Quick Payback With Precision CoolingA precision cooling system produces tangible nancial bene ts. Whena 10-ton precision system was compared with a 15-ton com ort systemproviding the same level o IT cooling, the precision system savedover $11,000 in annual costs providing a 12-month payback or theadditional purchase cost o the precision system.

Annual Costof SensibleCooling

Annual Costto Humidify

Total AnnualCost

Comfort System(15-ton unit)

$16,902 $7,688 $24,590

Precision System (10-ton unit)

$11,322 $1,283 $12,605

Savings $5,580 $6,405 $11,986

Comparison Assumptions for Precision Cooling to Comfort Cooling:

500 square oot data center with 32kW o equipment.

72 F and 50 percent RH room conditions.

$0.10/kW-hr.

Com ort system costs $1,878 per sensible ton/year to operate. Comfort system removes 1.4kW of latent heat per ton of sensible cooling.

Precision system costs $1,258 per sensible ton/year to operate.

Precision system removes .35kW o latent heat per ton o sensible cooling.

Case Study Sequent is a consulting and outsourcing

rm located in Columbus, Ohio, helpingmore than 500 organizations improvecorporate per ormance through theintegration o people, strategies, processmanagement and technology.

An increase in the demand or outsourcedhuman resources support placed Sequentat the doorstep o opportunity orachieving signi cant business growth.

Critical NeedsDesign and implement a new datacenter that could e ciently meet currentrequirements while easily scaling tosupport projected growth. Increasecooling system capacity and per ormanceto ensure even temperatures.

Solution A Liebert Challenger 3000 Floor-MountPrecision cooling unit now providescomplete environmental control,including temperature, humidity andair ltration. Its a sel contained systemthat ts into seven square eet o cornerspace which reduced the amount o foorspace needed to be kept open. The LiebertChallenger is supported by a ceiling-mounted Liebert Mini-Mate unit to createa redundant precision cooling solutionthat can handle any ailovers.

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Our business is dependent on our IT systems, saysDonovan. Without our technology, the rest o our businesscannot unction. Naturally, it is imperative that our systemsare up and running as intended so that we can serve ourclients at the level theyve come to expect rom Sequent.

Brian Donovan, network administrator, Sequent


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Many o todays data centers started out in smallspaces with one or two racks and used an existingbuilding air conditioning system to cool the room.As the cooling load increased, however, the com ortsystems were not designed to handle the heat o highdensity racks or operate 24 hours a day, 7 days a week.

In this situation, servers could actually shutdownbecause o high heat or processors could dial back theirper ormance because o higher temperatures. I you donot control the environment in the space you may notget the per ormance you expect rom the system youare running.

Maintaining The Right Humidity Is CriticalIn A Data Center

In com ort cooling, dehumidi cation is a key elemento keeping it com ortable in the space. In data centers,you want to maintain a certain level o humidity--typically around 50% relative humidity--to maintainthe proper operation o your servers and IT equipment.To do that you need a cooling system that does lessdehumidi cation and is really more concerned withcontrolling sensible heat within the data center.

The leading industry organization on HVAC standards,ASHRAE (American Society o Heating, Re rigerationAnd Air Conditioning Engineers), recommends stable

temperature ranges o 64.4 to 80.6F or data centers.It also recommends controlling humidity levels withina dew point temperature range o 41.9 to 59% to avoidstatic electricity, another threat to IT equipment. Forinstance, humidity levels can get very low in the winter,so year-round humidity management is very important.

Why Precision Cooling Makes A Real Di erence

FlexibilityProvides better humidity control compared tostandard building air conditioning.Units are much easier to adapt to the moree cient hot aisle/cold aisle concept o rack cooling.

Retain existing space with little or nointerruption through use o ceiling, wallor corner installed equipment.Large range o system installation andcooling methods.

AvailabilityMore cooling per nominal capacity at 93% o the rating vs. standard building air conditioningunits at 65% o nominal rating.Move 40% more air to eliminate hot spots andbetter cool IT equipment racks.Provides much tighter control o temperatureand humidity to prevent per ormance andequipment degradation.Low ambient control provides reliable operationduring cooler seasons.Much higher compressor reliability.Designed or 24/7 operation.

Lowest Total Cost of Ownership

Local support to ensure that cooling systemsare sized or current needs and growth and thatthey are installed, serviced and maintainedwithout hassle.

Units are more energy e cient due to bettercontrol and better cooling capacity thanstandard com ort cooling systems.

Enhances system availability and ITequipment li e.


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Mid-Large Server Rooms, Data Centers

Small Server Rooms, Network Closets, and Small Data Centers

Liebert Datamate Liebert MCR Liebert XDF

Liebert DS

Liebert CRV Row-Based Cooling

Liebert CW TM

Liebert DS and Liebert CW TM ducted confgurations

Liebert XD

Cooling

Liebert Mini-Mate 2 Liebert Challenger with iCOM

Liebert Cooling Solutions Are ConfguredTo Meet The Unique Needs O IT Spaces

If these cooling related issues are affecting your data center, you need toconsider a dedicated cooling system:

You have di culty keeping temperatures in the room at or below 78F be ore newequipment is installed.

You have no way to target additional cooling to racks with densities above 5kW.

You have no way to monitor power and cooling system per ormance or trending and no wayto be alerted to potential problems.

High heat is limiting the amount o equipment you can place in racks.

The cost o running a building air conditioning system or your CW IT space has become too high.

Liebert SmartAisle


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The Right Cooling Solutions And The Right People To Bring It All Together

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Local Support Makes The Real Difference

In addition to the technological and cost advantages you get with precisioncooling, you also will enjoy the support o Emerson Network Powersnetwork o local Liebert Representatives. These power and cooling expertsaverage more than 16 years in the business and can provide an up- rontassessment o your cooling needs. They also have important relationships

with mechanical engineers and contractors who can help you withinstallation, startup and maintenance o your cooling system. Your localLiebert Representative will ollow the project rom start to nish.

We also excel in service a ter the sale. Liebert Services provides bothscheduled preventive maintenance and rapid-response emergency servicewhenever and wherever it is needed. Liebert Services has the industryslargest coverage with hundreds o Certi ed Factory Trained Engineers

rom coast-to-coast. Additionally, the Liebert High Availability ResponseCenter supports customers 24x7 with a sta o knowledgeable peoplewho understand the technology and equipment.


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No One Knows More About IT CoolingThan Emerson Network Power

For over 40 years, Liebert brand products rom Emerson Network Powerhave set the standard or critical data center cooling. Our name can be

ound on hundreds o thousands o products that are protecting mission-critical systems throughout the world. This experience goes into everycooling product we make or every application.

While the size and con gurations o data centers have changed signi cantlyover these years, the need to protect them has not. Everything Lieberthas learned about cooling critical equipment goes into the products andservices we o er or todays data center. You can be sure that the Liebertsolution or your IT cooling applications will always be the best solution and the most cost-e ective solution.

For more in ormation, contact your local Liebert Solutions Partner orLiebert Representative.


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Emerson Network Power. The global leader in enabling Business-Critical Continuity .

EmersonNetworkPower.com

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Embedded ComputingEmbedded PowerMonitoring

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Racks & Integrated CabinetsServices

Precision Cooling Surge Protection

Emerson Network PowerLiebert CorporationWorld Headquarters1050 Dearborn DriveP.O. Box 29186

Columbus, Ohio 43229United States O America800 877 9222 Phone (U.S. & Canada Only)614 888 0246 Phone (Outside U.S.)614 841 6022 FAX

Emerson Network PowerEuropean HeadquartersVia Leonardo Da Vinci 8Zona Industriale Tognana35028 Piove Di Sacco (PD)Italy39 049 9719 111 Phone39 049 5841 257 FAX

Emerson Network Power Asia Paci ic

29/F, The Orient Square BuildingF. Ortigas Jr. Road, Ortigas CenterPasig City 1605Philippines+63 2 687 6615+63 2 730 9572 FAX

liebert.com

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

Emerson Network Power, the global leader in enabling business-critical continuity,ensures network resiliency and adaptability through a amily o technologies in-cluding Liebert power and cooling technologies that protect and support

business-critical systems. Liebert solutions employ an adaptive architecture thatresponds to changes in criticality, density and capacity. Enterprises bene t

rom greater IT system availability, operational fexibility, and reduced capitalequipment and operating costs.

Ensuring The High Availability O Mission-Critical Data And Applications.

While every precaution has been taken to ensure accuracy andcompleteness in this literature, Liebert Corporation assumes noresponsibility, and disclaims all liability or damages resulting

rom use o this in ormation or or any errors or omissions.

2009 Liebert Corporation. All rights reserved throughout

the world. Specifcations subject to change without notice. All names re erred to are trademarks or registered trademarkso their respective owners. Liebert is a registered trademark o the Liebert Corporation.

SL-11294 (R11/09) Printed in USA

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

2009 Emerson Electric Co.

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