Scroll Liquid Chillers - Trane

1 Scroll Liquid Chillers20 to 60 Tons (60 Hz)17 to 50 Tons (50 Hz)Water-Cooled and CondenserlessCG-PRC011-ENJanuary 2002 Built For the Industrial and Commercial MarketsCG-PRC011-EN 2002 American Standard Inc. All rights andBenefitsMore Than Just Another Improved chiller Advanced Design Better Reliability Superior Efficiency Smarter Microprocessor Control Better Availability Easier To Install and OperateThe Trane 20-60 Ton Scroll Liquid ChillerEvaporator LeavingWater PipingDesignThe Trane Scroll compressor is the mostadvanced compressor in the percent fewer compressor parts,compared to reciprocating compressors,mean long and reliable Scroll Chillers meet and exceedASHRAE Standard full and part loadefficiencies.

2 Part load efficiencies aresimply unmatched by and complete safety andcontrol algorithms ship cycles on both stock and built-to-order unit size, factory wiring, easylifting provisions, and start-up controllogic mean quick and easy fit through standard single-width safety features and over 40diagnostic displays mean easy andvirtually trouble-free Supply Monitor ProtectsCompressors From Phase Loss, PhaseReversal, Phase Imbalance, Incorrect PhaseSequence and Under and Over VoltageRugged TraneScrollCompressorControlPanelMicropr ocessorOperatorInterfaceCondenserLeaving Water PipingCondenserEnteringWater Piping3CG-PRC011-ENContentsFeatures and BenefitsModel Number DescriptionGeneral DataApplication ConsiderationsSelection ProcedurePerformance Adjustment FactorsPerformance DataElectrical DataJobsite ConnectionControlsDimensional DataWeightsOptionsTypical Wiring DiagramsFeatures SummaryMechanical Specifications29101112131524262829343536 3839CG-PRC011-EN4 Standard FeaturesMicroprocessor ControlMicroprocessor control means the scrollchiller maintains chilled watertemperature more accurately.

3 Resulting inless temperature drift in the building. Themicroprocessor control also incorporatesoptimal chiller start-up logic (low andhigh ambient), load limiting, compressoranti-recycle timing, auto lead/lagfunction, compressor protection, andmany other safety features. The smart safety features provide complete faultprotection without nuisance : consistent, reliable operation,longer Chilled WaterTemperature ControlThe microprocessor actually monitorstemperature and the rate of change overtime, effectively controlling compressorloading for efficient chiller : accurate and efficient buildingcomfort, less energy and DisplayThe microprocessor s operator interfaceis a menu-driven digital display.

4 Thedisplay provides temperatures,pressures, setpoints and diagnosticsreadouts. Flashing display notifiesoperator of fault condition anddiagnostics are saved until : easy troubleshooting andcontrolCompressor ProtectionAll compressors are individuallyprotected against starting and runningoverload, under and over voltages,phase loss, phase reversal, high windingtemperature and rapid : long unit life and ControlSeveral external contacts are providedfor custom control requirementsincluding time of day scheduling and kWdemand : more standard control andmore flexible owner Standard Features Control power transformer Auto lead/lag (on or off) Solid-state motor protection Insulation (Armaflex II or equal) Evaporator and condenser water pumpinterlocks Filter-dryer Built-in loss of chilled water flowsensors Chillers fit through standard singlewidth standard ARI rating condition(54/44 F and 85 gpm per ton) andIPLV are ARI certified.

5 All other ratings,including the following, are outside thescope of the certification program andare excluded: Glycol. 50 Hz. Condenserless models Trane Integrated Comfort systemscommunication Generic building automation systems(BAS) interface Chilled water reset (ambient, zone,return) Ice making Hot gas bypass Remote display/control panel Remote running indication and alarmcontact Unit-mounted disconnect Gauges Sound Attenuation Neoprene Isolators Compressor cycle counter/hour meter Water regulating valves Condenser water temperature sensorsWater chiller Systems Business UnitFeatures andBenefits5CG-PRC011-ENLeading in Efficiency and Reliability with State-Of-The-ArtScroll Compressor TechnologyEfficiencyThe energy efficiency of the Scroll chillerresults in energy costs lower than anyother comparable chiller .

6 Full loadefficiencies are improved beyondreciprocating Chillers , but part loadefficiencies are simply unmatched by anyother efficiencies are obtained bycombining many of the traditional scrollchiller energy efficient features with theTrane Scroll compressor S HOW: Scroll compressor s positivedisplacement design Dual refrigerant circuits (40-60 ton units) Multiple compressors Optimum system design Reduced friction No valves Advanced heat transfer surfacesChart illustrates low torque variation of theTrane Scroll compressor vs illustrates Trane Scroll chiller s superior annual energy costs vs typical andBenefitsOperating TorqueReliabilityThe Trane Scroll chiller with many newimprovements, now brings an excitingnew compressor to the commercialmarket the Trane Scroll has designed the scrollcompressor to be a leader in S HOW: Simple design with 64 percent fewerparts than equal capacity reciprocatingcompressor.

7 Scroll compliance allows Liquid and dirtto pass through without damagingcompressor ( Liquid slugging resistant). Advanced microelectronics protect bothcompressor and motor from typicalelectrical fault conditions. Scroll compressors have less than athird the torque variations of areciprocating compressor. Years of laboratory testing haveoptimized compressor and chillersystems reliability. Water-cooled Scroll Chillers are Standard All Tranechillers meet and exceed the newefficiency levels mandated by ASHRAES tandard This new standardrequires higher efficiencies than pasttechnologies can deliver. In fact, energyefficiency is so paramount the USFederal Government has adoptedstandard Federal Executive Ordermandates energy consuming devicesprocured must be in the top 25% of theirclass.

8 In the case of Chillers , is the product standard Not only has ASHRAE beenadopted by the US Federal Government,it s expected to be adopted domestically,if not globally, in the future. Make surethat your Chillers as well as your entireHVAC system complies, or you may becaught retrofitting your project with newequipment and paying extra designdollars if the code changes s CGWE was designed with theend user s requirements in and reliability were primarydesign concerns with this latestgeneration chiller Energy Usage SavingsKilowatt HoursChiller Load (%)Typical ReciprocatingChillerScroll Chiller10-20% Annual Energy SavingsCG-PRC011-EN6 Trane Scroll Compressor Maximum Efficiency with Enhanced ReliabilityGeneralThe Scroll compressor has two top Scroll is fixed and the bottomscroll orbits.

9 Each Scroll has walls in aspiral shape that OrbitAs the bottom Scroll orbits, tworefrigerant gas pockets are formed OrbitThe refrigerant gas is compressed as thevolume is reduced closer to the center ofthe OrbitThe gas is compressed further anddischarged through a small port in thecenter of the fixed Principal ComponentsThis is a cutaway view of a hermetic, Scroll compressor, showing the relativepositions of the principal is a Trane 10-ton, 3600 rpm, 60 Hz[3000 rpm, 50 Hz] Scroll compressor asan principle of operation of thisexample compressor is as follows: Thesuction gas is drawn into the compressorat A. The gas then passes through thegap between the rotor and stator, B,cooling the motor, before it enters thecompressor housing, C.

10 Here, thevelocity of the gas is reduced, causing aseparation of the entrained oil from thegas stream. The gas then enters theintake chamber, D, that encircles , the suction gas is drawn into thescroll assembly where it is compressedand discharged into the dome of thecompressor. The dome of this examplecompressor acts as a hot gas mufflerwhich dampens the pulsations before thegas enters the discharge line, andBenefits7CG-PRC011-ENPacked Stock For Fast DeliveryWhen your project is a fast-track job, Trane can help. A wide range of chillersare stocked and can be shipped soonafter receipt of your To OrderNeed a special chiller fast? Think Tranescroll Chillers . New manufacturingtechnology and inventory control meansthe fastest delivery schedule in theindustry.