Air-Cooled Series R Rotary Liquid Chiller - Trane

1 Air-Cooled Series R Rotary Liquid ChillerModel RTAC140 to 500 Tons (60 Hz)140 to 400 Tons (50 Hz)Built For the Industrial and Commercial MarketsRLC-PRC006-ENAugust 2002 2002 American Standard Inc. All rights 1 Cutaway of RTAC Air-Cooled Chiller12345655Yo 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 RTAC was designed with the enduser s requirements in mind.

2 Reliability,sound, efficiency and physical size wereprimary design concerns with this latestgeneration machine. New technologieswere applied to literally every majorcomponent. The result is an unparalleledengineering achievement in chillerdesign and s NewThe RTAC offers the same high reliabilityof Trane s previous Air-Cooled helicalrotary design coupled with loweredsound levels, increased energyefficiency, reduced physical footprint dueto its advanced design, low speed/directdrive compressor and proven Series of the major advantages of theModel RTAC are: Over 99% reliable Lower sound levels Higher energy efficiency Smaller physical footprint HFC-134a optimized designThe Series R Model RTAC is an industrialgrade design built for both the industrialand commercial markets.

3 It is ideal forschools, hospitals, retailers, officebuildings, Internet service providers Flooded Style Evaporator2. Trane Helical- Rotary Compressor3. Oil Separator4. Low Sound Condenser Fans5. Factory Installed and Tested UnitControls and Starter6. Smaller Physical Footprint3 IntroductionFeatures and BenefitsOptionsApplication ConsiderationsSelection ProcedureModel Number DescriptionGeneral DataPerformance Adjustment FactorsPerformance DataFull Load PerformancePart Load PerformanceElectrical DataElectrical ConnectionsControlsStandalone ControlsGeneric Building Automation System ControlsTrane Integrated Comfort System ControlsDimensional DataWiring and LayoutWeightsMechanical SpecificationsContentsRLC-PRC006-EN24913 1415192034465155657478 RLC-PRC006-EN4 RTAC - Exceeding the Efficiency Standard 60 HzFull Load Efficiency (EER*)

4 Part Load Efficiency (EER*)TonnageASHRAE EfficiencyHigh EfficiencyASHRAE EfficiencyHigh *COP = andBenefitsASHRAE Standard andRTAC World Class 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 RTAC is one way tomaximize your Standard & ExecutiveOrder - New technology applied to thedesign, controls, and manufacturinghave created excellent efficiency levels inthe RTAC that are helping to pushindustry minimums to new heights.

5 AllTrane Air-Cooled chillers meet the newefficiency levels mandated by ASHRAES tandard This new standardrequires higher efficiencies than pasttechnologies can deliver. The US FederalGovernment has adopted standard , in some cases, requires even higherefficiencies. Federal Executive Ordermandates energy consuming devicesprocured must be in the top 25% of theirclass or be at least 10% better than anyproduct standard for that product. In thecase of chillers, that product standard isASHRAE Trane s RTAC meets andexceeds the efficiency requirements , while the high efficiency RTAC canmeet the stretch goals of The US Federal Government hasadopted ASHRAE , and it s expectedto be adopted domestically, if notglobally, in the future.

6 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. Reciprocating and screwchillers with stepped capacity control dowell to maintain chilled watertemperatures within 2 F of control also results inovercooling your space because rarelydoes the capacity of the machine matchthe building load.

7 The result can be 10%higher energy bills. Trane s RTAC optimizes the part load performance ofyour machine for energy efficiency,precise control for process applications,and your personal comfort regardless ofthe weather buildings 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 tenantsare uncomfortable and productivity islost. Trane s helical Rotary compressorshave a first year reliability rate of over99%, which means our chillers stayrunning when you need moving parts.

8 Trane s helicalrotary compressors have only two majorrotating parts: the male and female reciprocating compressor can havemore than 15 times that number ofcritical parts. Multiples of pistons, valves,crankshafts, and connecting rods in areciprocating unit all represent differentfailure paths for the compressor. In fact,reciprocating compressors can easilyhave a failure rate four times of a helicalrotor. Combine that 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 components.

9 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. Contrast this to areciprocating compressor, which can bedestroyed by a single slug of coils. Trane s condensercoils are manufactured with the samephilosophy as the compressors; they rebuilt to last. Even though manufacturingprocesses have allowed thinner andthinner materials in their assembly, withobvious material and manufacturingsavings, Trane s coil material did notchange with the RTAC generation of aircooled chillers.

10 Substantial condenserfins, that do not require additionalcoating in non-corrosive environments,contribute to the highest reliabilitystandards for Air-Cooled chillers in andBenefitsFigure 2 Cutaway of a compressorRLC-PRC006-EN6 Simple Installation Compact Physical Size. The TraneModel RTAC Chiller averages a 20%reduction in physical footprint, whilethe greatest change is actually 40%smaller when compared against theprevious design. This improvementmakes the RTAC the smallest air-cooledchiller in the industry and a primecandidate for installations that havespace constraints. All physical sizeswere changed without sacrificing theside clearances needed to supply freshairflow without coil starvation.