Liebert - Prasa-pl

Liebert CW 26-181kWChilled Water Cooled Precision AirConditioning For Data Centers 91 8806660084www.prasa-pl.comenquiry@prasa-pl.com

LIEBERT CW A Chilled Water Precision System That Handles The Most Demanding ConditionsBased on the historically reliable design ofthe Liebert Deluxe System/3, the LiebertCW continues this reputation fordependability, and improves upon thedesign with energy saving upgrades. TheLiebert CW chilled water based precisioncooling system is specifically designed tohandle the high heat loads generated bycomputers and other electronicequipment, using an existing buildingchiller as a source of chilled water cooling.Built to the highest specifications in theindustry with proven components anddesign, the Liebert CW is ideal for criticalapplications including:Data centersTelecommunications centralIndustrial process control centersLaboratoriesMedical facilitiesTHE INDUSTRY’S PREMIER CHILLED WATER SYSTEMFlexibilityProvides a complete environmentalcontrol package, including bothprecision air conditioning andhumidity control.Both upflow and downflowconfigurations are availableto cover raised floor andnon-raised applications.Liebert iCOM control system bringshigh-level supervision to multipleunits, allowing them to work togetheras a single system to optimizeroom performance.Higher AvailabilityDesigned with the highest qualitycomponents selected for their provenreliability and performance.Provides around-the-clock operationto protect critical installations.Operates with a high sensible heatratio, assuring that proper humiditylevels will be maintained.Liebert iCOM control system addsautomatic sequencing of componentsto even wear and extend service life.Lowest Total Cost of OwnershipUses existing building chilled watersystems to provide cooling.EC Plug Fan on larger downflowmodels and variable speed drivecentrifugal fans available on all models.2EC Plug Fans are available on downflow modelsShown in underfloor configuration. 91 8806660084Service SolutionsLiebert Services capabilities can increasethe availability of your precision coolingequipment by reducing downtime due tocomponent failure. This is especiallyvaluable to companies who do not have adedicated technician on-site totroubleshoot equipment. Field service isprovided by a nationwide network oflocally-based, factory-trained techniciansfor installation, support and maintenanceof Liebert precision environmentalinclude warranty service, emergencycoverage and preventive maintenance.site management program that creates acustomized solution for your site byservice needs.www.prasa-pl.comenquiry@prasa-pl.com

A Choice Of ConfigurationsMore Configurationsto Fit More ApplicationsHigh performance, sensitive electronicequipment requires precise, reliablecontrol of room temperature, humidity andairflow for proper operation. Liebert CW meets these needs forenvironmental control in computerdependent operations. It is available insizes from 26-181kW, and in airflowconfigurations to meet uniqueapplications.Downflow SupplyDesigned for raised-floor applications, thedownflow air supply configuration is commonlyfound in data centers and other similar facilitieshousing sensitive electronic equipment.EC Plug Fans — Under Floor ConfigurationWith EC Plug Fans below unit in raised floor space,than centrifugal blowers, while providing moreirflow.EC Plug Fans — In-Unit ConfigurationDesigned for applications with limited under floorspace, the fans are located within the Liebert CWunit itself. This configuration provides significantenergy savings over standard centrifugal fans.Centrifugal Fans With Variable Speed DrivesVariable speed fans are located within the Liebertover standard fans, and is available for both upflowand downflow system configurations.Top Front Supply With Plenum & Grille AndFront ReturnIn-the-space applications without ductwork, suchas Telecommunications, Networks and SwitchingCenters, benefit from this economicalconfiguration Optional high filtration maybe desirable.Top Front Supply And Front ReturnEngineered for in-the-space applications utilizingduct work, this airflow design is commonly usedfor Telecommunications or Industrial applications.High static pressure and filtering options maybe selected.Top Rear Supply And Rear ReturnDesigned for use in out-of-space applications, thisconfiguration is typical for Industrial Processessuch as Control Rooms, and Labs. Many of thesesites will select a higher static pressure andsupply and return)Top Front Supply With Plenum & Grille AndBottom ReturnSpecifically designed for use in raised floor, in-theroom applications, this configuration takesadvantage of typical computer room construction.Additional filtering may be requested to protectsensitive computers and peripherals. 91 8806660084www.prasa-pl.comenquiry@prasa-pl.com3

LIEBERT CW Economical Chilled Water SystemsBy taking advantage of your existing central air conditioning chiller, the Liebert CW provideseconomical, durable cooling and humidity control around the clock, throughout the year.The Liebert CW chilled water systemhumidity control where a central waterchiller is available as a year-round coolingsource. In these applications, a singlechiller can be used for multiple airconditioning units, providing savings onadditional heat rejection components.The full line of Liebert chilled watersystems use Liebert iCOMmicroprocessor-based controls tomaintain precise temperature andhumidity levels, while the coolinghardware is designed and built forcontinuous, trouble-free operation.More Cooling CapacitiesAvailable in ten cooling capacities,with either upflow ordownflow configurations.EC Plug Fans in underfloor configuration(available on downflow models)4 91 8806660084Chilled Water Control ValveThe chilled water valve providesproportional control action in response toroom temperature and humidity assensed by the microprocessor control. Itincludes operating linkage and electronicmotor. Unlike other systems of this natureit requires no over-travel linkage or endswitches to be adjusted. The control uses“intelligent logic” to eliminate valvehunting, thus greatly increasing the life ofthe valve. The valve can be a 3-way or2-way to meet the appropriaterequirements of the installed system.EC Plug Fans in-unit configuration(available on downflow models)www.prasa-pl.comenquiry@prasa-pl.com

Every Feature Contributes To Absolute ReliabilityFans And MotorsClean, even air distribution is supplied bylarge capacity fans, which are balanced tominimize vibration. The fans draw filteredair through the system. An EC Plug Fanoption is available for Liebert CWdownflow models.Draw-Through AirflowWhen the demand is for around the clock operation, you simplycan’t take shortcuts. Liebert CW is designed with robustcomponents that operate reliably under the most demandingconditions, ensuring uptime for sensitive electronics incritical applications.and optional Variable Speed Drive fanmotors, are available on all models 91 8806660084The fans draw air evenly and at lowvelocity through the cooling coil, reheatand humidification systems. The result isfat less turbulence with superiorthe right temperature and humidity is fedpositively and evenly into the room.A-Frame CoilInfrared HumidifierThis Liebert designed and manufacturedA-Frame coil features a large face area/low face velocity design for maximumcooling and even air distribution.The infrared humidifier design consists ofquartz lamps mounted above a stainlesssteel water reservoir. The lamps nevercome in contact with the water. Whenhumidification of room air is required,infrared rays generate water vapor—without impurities or odor, within seconds.www.prasa-pl.comenquiry@prasa-pl.com5

LIEBERT CW Liebert iCOM Optimizing Cooling SystemEnergy Savingsvariety of advantages:Saves energy using predictivehumidity control.Built-in lead/lag functions forenhanced system reliability.Wellness calculation alerts servicepersonnel before problems occur.Unit-to-unit communications allowsteamwork settings to keep multipleunits working together to optimizeSmall Graphic Display ModelLarge Graphic Display ModelThe Liebert iCOM with small display has a128 x 64 dot matrix screen thatsimultaneously shows two menu icons,along with descriptive text. This display iscapable of controlling only the unit it isdirectly connected to. Views include:The Liebert iCOM with large display has a320 x 240 dot matrix screen that showsup to 16 menu icons at a time, as well asdescriptive text. This display can be usedto control a single cooling unit or anycooling unit on a network, regardless ofhow it is connected—either integratedinto a cooling unit or simply connected tothe network and mounted remotely. Itprovides the same information as thesmall display plus these additional views:Event logTemperature and humidity graphsLiebert iCOM At A GlanceThe Status menu shows setpoints,environmental conditions, operationalstatus, alarm conditions andsystem health.Graphical viewSimple viewDisplay iconsStandby/lead/lagUnit wellnessSpare parts listService contact informationUnit diaryView status of all cooling unitsThe Optional WallMounted Large GraphicDisplay providescentralized monitoringand control of connectedLiebert CW units.Control any cooling uniton networkView system averages of entire coolingunit networkAccess levels—user, service, advancedHelp menu layoutThe optional vNSA withiCOM combines a WallMounted Large GraphicDisplay along with anetwork switch tofacilitate U2U wiring inone convenient cabinet.Temperature and humidity graphsOnline help menusU2U Configuration 2 Liebert CW units with SmallGraphic Display may be centrally monitored andcontrolled with the Optional Wall Mounted Display.6 91 8806660084www.prasa-pl.comenquiry@prasa-pl.com

A Choice Of Fans To Fit Every Application RequirementOur downflow floormount Liebert CW models are now availableOptional Energy Saving VariableSpeed Drive Fan MotorAll Liebert CW models are alsoavailable with an optional variablespeed drive on the fan motor used todrive centrifugal blowers, matching themotor speed to the room coolingrequirements. This feature allows theunit to use far less motor energy tomove room air.The Liebert CW with EC Plug Fan deliverssystem. These electrically commutatedfans are a backward curved motorizedimpeller powered by a direct drive DCMotor with integrated AC-DC conversion.This drive is controlled by the LiebertiCOM control system to match thespeed of the blower with the chilledwater valve position and consequentlythe load in the room. This optioneliminates excessive energy use dueto an oversized design or changingroom conditions.This design uses less energy thanstandard centrifugal blowers by loweringmotor kW. The EC Plug Fan uses 10-30%less energy on average than standardAC motors.The EC Plug Fan is located in the areabeneath the raised floor or within the unit.Superior energy savings can be realized with the fans located beneath the raised floor.centrifugal blowers. The EC Plug Fan also provides greater energy savings than variablespeed drives. 120,0002.5 100,000Fa2.01.5VFDECFanUndfleroor1.00.50.0PRESENT VALUE COST, nInUnit3.0ECPAYBACK, MONTHSReal World Energy Savings 80,000Centrifugal fan at 100% speedy motorVF 60,000enDCitluga n In UnFaCEorerfloUndFa ntrifEC 40,000 20,000 060%70%80%90%100%60%The energy saving capabilities of the Liebert CW with EC Plug Fans or variablespeed drive fans result in a quick payback through lower electricity costs.www.prasa-pl.com80%90%100%% FAN SPEED% FAN SPEED 91 880666008470%enquiry@prasa-pl.comExample shows Liebert CW106 @.10/kWH.7