Air-Cooled Series R Rotary Liquid Chiller

1 Air-Cooled Series R Rotary Liquid ChillerModel RTAA70 to 125 TonsBuilt for the Industrial and Commercial MarketsRLC-PRC016-ENAugust 2002 RLC-PRC016-EN2 Features andBenefitsYo its chillers, Trane wants itsrelationships with customers to is interested in maintaining longterm, loyal relationships. Thisperspective means the point in time thata customer purchases a Chiller is thebeginning of a relationship, not the business is important, but yoursatisfaction is by s RTAA 70-125 was designed withthe end user s requirements in , efficiency, sound, andphysical size were primary designconcerns in expanding the RTAA productline down to 70 tons. The result is areliable Chiller that will help you achieveyour bottom line goals.

2 2002 American Standard Inc. All rights and BenefitsModel Number DescriptionGeneral DataSelection ProcedureApplication ConsiderationsPerformance Adjustment FactorsPerformance DataElectrical DataJobsite ConnectionsControlsDimensional DataWeightsOptionsTypical Wiring DiagramsFeatures SummaryMechanical Specifications21314151620222930324041424 34546 The standard ARI rating condition(54/44 F and 95 F) and IPLV are ARIcertified. All other ratings, including thefollowing, are outside the scope of thecertification program and are excluded: Glycol. 50 Hz. Remote evaporator Chiller Systems Business UnitRLC-PRC016-EN4 Features andBenefitsImprovementsThe RTAA 70-125 offers the same highreliability of its larger predecessorcoupled with lowered sound levels,increased energy efficiency, and reducedphysical footprint, all due to its advanceddesign, low speed/direct drivecompressor and proven Series R of the major advantages of theModel RTAA 70-125 vs its largerpredecessor are: Higher energy efficiency Lower sound levels Smaller physical footprintThe Series R Model RTAA 70-125 is anindustrial grade design built for both theindustrial and commercial markets.

3 It isideal for schools, hospitals, retailers,office buildings, Internet serviceproviders and Standard and RTAA 70-125 World Class Energy importance of energy efficiencycannot be understated. Fortunately,ASHRAE has created a guidelineemphasizing its , energy is often dismissedas an operational cost over which theowner has little control. That perceptionresults in missed opportunities forenergy efficiency, reduced utility bills,and higher profits. Lower utility billsdirectly affect profitability. Every dollarsaved in energy goes directly to thebottom line. Trane s RTAA 70-125 is oneway to maximize your Standard & ExecutiveOrder - New technology applied to thedesign, controls, and manufacturinghave created superior efficiency levels inthe RTAA 70-125 that are unmatched inthe industry.

4 All Trane Air-Cooled chillersmeet the new efficiency levels mandatedby ASHRAE Standard This newstandard requires higher efficienciesthan past technologies can deliver. TheUS Federal Government has adoptedstandard and, in some cases,requires even higher Executive Order mandatesenergy consuming devices procuredmust be in the top 25% of their class orbe at least 10% better than any productstandard for that product. In the case ofchillers, that product standard isASHRAE Trane s RTAA 70-125meets and exceeds the efficiencyrequirements of , with some unitsmeeting the stretch goals of The US Federal Government hasadopted ASHRAE , and it s expectedto be adopted domestically, if notglobally, in the future.

5 Domesticacceptance has already begun. Makesure that your chillers as well as yourentire HVAC system complies, or youmay be caught retrofitting your projectwith new equipment and paying extradesign dollars if the code is adoptedduring Capacity Control. Trane spatented unloading system allows thecompressor to modulate infinitely andexactly match building loads. At thesame time chilled water temperatureswill be maintained within +/- 1/2 F ofsetpoint, potentially eliminating the needfor external considerations to maintaintemperatures. Reciprocating and screwchillers with stepped capacity control dowell to maintain chilled watertemperatures within 2 F of control also results inovercooling or undercooling your spacebecause rarely does the capacity of themachine match the building load.

6 Theresult can be 10% higher energy s RTAA optimizes the part loadperformance of your machine for energyefficiency, precise temperature controlfor all modes of operation, and yourpersonal comfort regardless of andBenefitsExcellent ReliabilityA building environment is expected tobe comfortable. When it is, no one saysa word. If it s that s a differentstory. The same is true with chillers. Noone ever talks about chillers, yet alonecompressors, until they fail, and tenetsare uncomfortable and productivity islost. Trane s helical Rotary compressorshave a first year reliability rate of over99%, which means our chillers stayrunning when you need compressors were designed toreplace the inherent design flaws of areciprocating compressor.

7 Trane s helicalrotary compressor has successfullyachieved this goal, proven by the over99% reliability rating of our compressorin the first year of operation. A gooddesign like Trane s should maintain thislevel of reliability for several years ofchiller operation. Not all screwcompressors maintain a high reliabilityand Trane is the only manufacturer thatwill publish a reliability number. Thepoint is to make sure that you are gettinga reliable screw Chiller design so that youdon t end up with the downtime and lostearnings that the industry is trying toavoid by getting away fromreciprocating moving parts. Trane s helicalrotary compressors have only two majorrotating parts: the male and female reciprocating compressor can havemore than 15 times that number ofcritical parts.

8 Multiples of pistons,valves, crankshafts, and connecting rodsin a reciprocating unit all representdifferent failure paths for thecompressor. In fact, reciprocatingcompressors can easily have a failurerate four times that of a helical this with two to threereciprocating compressors for eachhelical Rotary compressor on chillers ofequal tonnage, and statistics tell you it sa matter of time before you lose areciprocating parts. Helical rotarycompressors are precisely machinedusing state of the art processes fromsolid metal bar stock. Tolerances aremaintained within a micron or less thana tenth of the diameter of a human resulting compressor is a robust yethighly sophisticated assembly capable ofingesting Liquid refrigerant without riskof damage.

9 Contrast this to areciprocating compressor, which can bedestroyed by a single slug of R Compressor Highlights Direct-drive, low speed for highefficiency and reliability. Simple design with only four movingparts, resulting in high reliability andlow maintenance. Field serviceable compressor for easymaintenance. Precise rotor tip clearance for optimalefficiency. Suction gas- cooled motor, resulting inlower operating temperatures forincreased motor life, and giving thecapability for: Five-minute start-to-start/two minutestop-to-start capability, which allowsfor closer water loop andBenefitsRTAA 70-125 Chiller Highlights High Reliability, with over 99%compressor reliability rate in the firstyear of operation, and AdaptiveControls to keep the Chiller on lineproducing cold water during adverseconditions.

10 High Efficiency (all units exceedASHRAE efficiency standard). Low sound levels. Small footprint, with smallest requiredapplication space (operating footprint)in the industry. Years of research, testing, andsuccessful applications. The Tranehelical Rotary compressor has amassedthousands of hours of testing, much ofit at severe operating conditions. Notto mention the successful applicationof RTAA chillers for over 11 years, witha developed reputation as the industrystandard. Trouble free startup through factorytesting of compressor and completedchiller and factory installation of chilleraccessories. +/- F leaving water temperaturecontrol, resulting from PID feed-forward controls, and linear loadmatching, also allowing for 10% flowrate change per minute whilemaintaining F leaving watertemperature helical Rotary screw compressorcomponent parts versus reciprocatingcompressor andBenefitsSuperior Full Load EfficiencyPrecise Rotor Tip ClearancesHigher energy efficiency in a helicalrotary compressor is obtained byreducing the rotor tip clearances.