RLC-PRC006-EN 65

Dimensions

275

XE

- 6

0 H

Z

66 RLC-PRC006-EN

Dimensions

300

XE

- 6

0HZ

RLC-PRC006-EN 67

Dimensions

350

XE

- 6

0 H

Z

68 RLC-PRC006-EN

Weights

WeightsTable 1. Weight packaged units 60 Hz aluminum or CompleteCoat coils

Unit Size

(tons)

Standard Efficiency High Efficiency Extra Efficiency

Shipping Operating Shipping Operating Shipping Operating

lb kg lb kg lb kg lb kg lb kg lb kg

140 10831 4913 11077 5024 10858 4925 11140 5053 12172 5521 12557 5696

155 10910 4949 11113 5041 12114 5495 12414 5631 13983 6343 14306 6489

170 10868 4930 11205 5083 12172 5521 12557 5696 14434 6547 14698 6667

185 12478 5660 12892 5848 13983 6343 14306 6489 15906 7215 16382 7431

200 12885 5845 13208 5991 14434 6547 14698 6667 16006 7260 16351 7417

225 14905 6761 15224 6905 15906 7215 16382 7431 n/a

250 14549 6599 14896 6757 16006 7260 16351 7417 19881 9018 20558 9325

275 18491 8387 19148 8685 19881 9018 20558 9325 21150 9593 21702 9844

300 20176 9152 20744 9409 21150 9593 21702 9844 23564 10688 24237 10994

350 21030 9539 21485 9745 23564 10688 24237 10994 26605 12068 27342 12402

400 24890 11290 25446 11542 26605 12068 27342 12402 n/a

450 26310 11934 27005 12249 n/a n/a

500 26623 12076 27365 12413 n/a n/a

1. Operating weight includes refrigerant and water.2. Shipping weight includes refrigerant.

Table 2. Weight packaged units 60 Hz copper coils

Unit Size

(tons)

Standard Efficiency High Efficiency Extra Efficiency

Shipping Operating Shipping Operating Shipping Operating

lb kg lb kg lb kg lb kg lb kg lb kg

140 13406 6081 13656 6194 13432 6093 13716 6221 15591 7072 15985 7251

155 13419 6087 13696 6212 15647 7097 15831 7181 18249 8278 18601 8437

170 13443 6098 13724 6225 15591 7072 15985 7251 18684 8475 18963 8601

185 15869 7198 16256 7374 18249 8278 18601 8437 20783 9427 21256 9642

200 16305 7396 16645 7550 18684 8475 18963 8601 20881 9471 21225 9628

225 18712 8488 19027 8631 20783 9427 21256 9642 n/a

250 18897 8572 19160 8691 20881 9471 21225 9628 25505 11569 26072 11826

275 23370 10600 24095 10929 25505 11569 26072 11826 27078 12282 27724 12575

300 25681 11649 26212 11890 27078 12282 27724 12575 30341 13762 30968 14047

350 26894 12199 27400 12428 30341 13762 30968 14047 34482 15641 35280 16003

400 31708 14383 32315 14658 34482 15641 35280 16003 n/a

450 32176 14595 32731 14847 n/a n/a

500 34502 15649 35254 15991 n/a n/a

1. Operating weight includes refrigerant and water.2. Shipping weight includes refrigerant.

RLC-PRC006-EN 69

Mechanical Specifications

GeneralUnits are leak and pressure tested at 390 psig high side, 250 psig low side, then evacuated andcharged. All Air-Cooled Series R Chillers are factory tested prior to shipment. Packaged units shipwith a full operating charge of oil and refrigerant. Unit panels, structural elements and controlboxes are constructed of galvanized steel and mounted on a welded structural steel base. Unitpanels and control boxes are finished with a baked on powder paint, and the structural base withan air dry paint. All paint meets the requirement for outdoor equipment of the US Navy and otherfederal government agencies.

EvaporatorThe evaporator is a tube-in-shell heat exchanger design with internally and externally finnedcopper tubes roller expanded into the tube sheet. The evaporator is designed, tested and stampedin accordance with ASME for a refrigerant side working pressure of 200 psig. The evaporator isdesigned for a water side working pressure of 150 psig. Water connections are grooved pipe. Eachshell includes a vent, a drain and fittings for temperature control sensors and is insulated with3/4 inch equal insulation (K=0.26). Evaporator heaters with thermostat are provided to help protectthe evaporator from freezing at ambient temperatures down to -20F (-29C). Factory installed flowswitch is installed on a pipe stub in the evaporator inlet.

Condenser and FansAir-cooled condenser coils have aluminum fins mechanically bonded to internally finned seamlesscopper tubing. The condenser coil has an integral subcooling circuit. Condensers are factory proofand leak tested at 506 psig. Direct drive vertical discharge condenser fans are dynamicallybalanced. Totally enclosed air over motors completely seal the motor windings to preventexposure to ambient conditions. Three-phase condenser fan motors with permanently lubricatedball bearings and internal thermal overload protection are provided. Standard units will start andoperate between 25 to 115F (-4 to 46C) ambient.

Compressor and Lube Oil SystemThe rotary screw compressor is semi-hermetic, direct drive, 3600 rpm, 60 Hz, with capacity controlslide valve, a load/unload valve, rolling element bearings, differential refrigerant pressure oil pumpand oil heater. The motor is a suction gas cooled, hermetically sealed, two-pole squirrel cageinduction motor. Oil separator and filtration devices are provided separate from the compressor.Check valves in the compressor discharge and lube oil system and a solenoid valve in the lubesystem are also provided.

Refrigeration CircuitsEach unit has two refrigerant circuits, with one or two rotary screw compressors per circuit. Eachrefrigerant circuit includes a compressor suction and discharge service valve, liquid line shutoffvalve, removable core filter, liquid line sight glass with moisture indicator, charging port and anelectronic expansion valve. Fully modulating compressors and electronic expansion valvesprovide variable capacity modulation over the entire operating range.

Unit ControlsAll unit controls are housed in an outdoor rated weather tight enclosure with removable plates toallow for customer connection of power wiring and remote interlocks. All controls, includingsensors, are factory mounted and tested prior to shipment. Microcomputer controls provide allcontrol functions including startup and shut down, leaving chilled water temperature control,evaporator flow proving, compressor and electronic expansion valve modulation, fan sequencing,anti-recycle logic, automatic lead/lag compressor starting and load limiting. The unit controlmodule, utilizing Adaptive Control microprocessor, automatically takes action to avoid unitshutdown due to abnormal operating conditions associated with low refrigerant pressure, highcondensing pressure and motor current overload. Should the abnormal operating conditioncontinue until a protective limit is violated, the unit will be shut down. Unit protective functions

70 RLC-PRC006-EN

Options

include loss of chilled water flow, evaporator freezing, loss of refrigerant, low refrigerant pressure,high refrigerant pressure, reverse rotation, compressor starting and running over current, phaseloss, phase imbalance, phase reversal, and loss of oil flow. A digital display indicates chilled watersetpoint and leaving chilled water temperature as standard. While current limit setpoint,evaporator and condenser refrigerant pressures, and electrical information are an option. Bothstandard and optional displays can be viewed on the unit without opening any control panel doors.Standard power connections include main three phase power to the compressors, condenser fansand control power transformer and optional connections are available for the 115 volt/60 Hz singlephase power for freeze protection on the evaporator heaters.

StartersStarters are housed in a weather tight enclosure with removable cover plate to allow for customerconnection of power wiring. Across-the-line starters are standard on all 380-575/60 volt units. WyeDelta closed transition starters (33 percent of LRA inrush) are optional on 380-575/60 volt units andstandard on 200-230/60 Hz volt units. Typically, Trane helical rotary screw compressors are up tofull speed in one second when started across-the-line and have equivalent inrush with similar sizereciprocating compressor with part wind starters.

Chilled Water ResetThis provides the control logic and factory installed sensors to reset leaving chilled watertemperature. The setpoint can be reset based on ambient temperature or return evaporator watertemperature.

Flow ControlThe factory installed flow switch is provided with the control logic and relays to turn the chilledwater flow on and off as the chiller requires for operation and protection. This function is arequirement on the Air-Cooled Series R Chiller.

Options

Applications Options

High Efficiency/Performance OptionHigh efficiency option provides an increase in efficiency over standard efficiency by providingoversized heat exchangers for two purposes. One, it allows the unit to be more energy efficient.Two, the unit will have enhanced operation in high ambient conditions.

Extra Efficiency/Performance OptionExtra efficinecy option provides an increase in efficiency over the high efficiency unit by providingoversized heat exchangers for two purposes. One, it allows the unit to be more energy efficient.Two, the unit will have enhanced operation in high ambient conditions.

Ice MakingThe ice making option provides special control logic and oil coolers to handle low temperaturebrine applications (less than 40F [4.4C] leaving evaporator temperature) for thermal storageapplications.

Low Temperature BrineThe low temperature option provides special control logic and oil coolers to handle lowtemperature brine applications (less than 40F [4.4C] leaving evaporator temperature).

RLC-PRC006-EN 71

Options

Low Ambient OptionThe low ambient option provides special control logic, oil coolers, and variable frequency driveson the condenser fan circuits to permit low temperature startup and operation down to 0F (-18C).

High Ambient OptionThe high ambient option consists of special control logic and oil coolers to permit high ambient(up to 125F [51C]) operation. This option offers the best performance when coupled with the highefficiency performance option.

Remote EvaporatorThe remote evaporator option is available on the RTAC 140-250 ton units. This option provides apre-engineered method of installing the evaporator and all related components indoors. Remoteevaporator installations allow the water loop to remain indoors to prevent freezing, thuseliminating the addition of glycol to the system and the resulting performance degradation. Pleasecontact your Trane Sales Representative for split system design guidelines found in EngineeringBulletin RLC-PRB014-EN.

Electrical Options

Circuit BreakerA HACR rated molded case capacity circuit breaker (UL approved) is available. The circuit breakercan also be used to disconnect the chiller from main power with a through the door handle andcomes pre-wired from the factory with terminal block power connections. The external operatorhandle is lockable.

Non-Fused Power Disconnect SwitchThe non-fused molded case disconnect switch (UL approved) is used to disconnect the chiller frommain power and comes pre-wired from the factory with terminal block power connections. Theexternal operator handle is lockable.

Single/Dual Incoming Power Line ConnectionSingle or dual points of termination are available for incoming power line connections*. Units with3-4 compressors must order circuit breakers with the single point connection option.*Somerestrictions may apply.

Wye-Delta Compressor Start TypeThis option provides a reduced inrush starter. Wye-Delta starters are standard on 200-230 voltmachines.

Control Options

BACnet Communications InterfaceAllows the user to easily interface with BACnet via a single twisted pair wiring to a factory installedand tested communication board.

LonTalk (LCI-C) Communications InterfaceProvides the LonMark chiller profile inputs/outputs for use with a generic building automationsystem.

Remote Input OptionsPermits remote chilled liquid setpoint, remote current limit setpoint, or both by accepting a 4-20mA or 2-10 Vdc analog signal.

72 RLC-PRC006-EN

Options

Remote Output OptionsPermits alarm relay outputs, ice making outputs, or both.

Tracer Summit Communication InterfacePermits bi-directional communication to the Tracer Summit system.

Other Options

Architectural Louvered PanelsLouvered panels cover the complete condensing coil and service area beneath the condenser.

Coil ProtectionLouvered panels protect the condenser coils only.

Compressor Sound EnhancementFactory installed weatherproof compressor enclosure to reduce compressor sound levels.

Condenser Corrosion ProtectionCopper fins and CompleteCoat are available on all size units for corrosion protection. Job siteconditions should be matched with the appropriate condenser fin materials to inhibit coil corrosionand ensure extended equipment life. The CompleteCoat option provides fully assembled coils witha flexible dip and bake epoxy coating.

Convenience OutletProvides a 15 amp, 115 volt (60 Hz) convenience outlet on the unit.

Flange KitProvides a raised face flange kit that converts the grooved pipe evaporator water connections toflange connectors.

Insulation for High HumidityThe evaporator is covered with factory-installed 1.25 inch (31.8 mm) Armaflex II or equal (k=0.28)insulation. Foam insulation is used on the suction line.

Low Noise FansComplete fan assembly combining ultra quiet seven blade fans and TEAO fan motors to providesound reductions with no performance degradation to the unit. The fan blades are heavy-dutymolded plastic with wavy edges to reduce airflow turbulation.

Neoprene IsolatorsIsolators provide isolation between chiller and structure to help eliminate vibration transmission.Neoprene isolators are more effective and recommended over spring isolators.

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, theleader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broadportfolio of advanced controls and HVAC systems, comprehensive building services, and parts.For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

We are committed to using environmentally

conscious print practices that reduce waste.

2012 Trane All rights reserved

RLC-PRC006-EN 25 May 2012

Supersedes RLC-PRC006-EN (01 Aug 2011)

Air-Cooled Series RRotary Liquid Chiller

Model RTAA70 to 125 Tons

Built for Industrial and Commercial Markets

RLC-PRC016-ENNovember 2006

RLC-PRC016-EN2

Features andBenefits

YouLike its chillers, Trane wants itsrelationships with customers to last.Trane is interested in maintaining longterm, loyal relationships. This perspectivemeans the point in time that a customerpurchases a chiller is the beginning of arelationship, not the end. Your business isimportant, but your satisfaction isparamount.

Designed by Customers.Tranes RTAA 70-125 was designed withthe end users requirements in mind.Reliability, efficiency, sound, and physicalsize were primary design concerns inexpanding the RTAA product line down to70 tons. The result is a reliable chiller thatwill help you achieve your bottom linegoals.

2002 American Standard Inc. All rights reserved.

3RLC-PRC016-EN

Contents

Features and Benefits

Controls

Application Considerations

Model Number Description

General Data

Selection Procedure

Performance Adjustment Factors

Performance Data

Electrical Data

Dimensional Data

Weights

Options

Mechanical Specifications

2

12

18

22

23

24

25

27

32

38

42

45

46

The standard ARI rating condition(54/44F and 95F) and IPLV are ARIcertified. All other ratings, including thefollowing, are outside the scope of thecertification program and are excluded: Glycol. 50 Hz. Remote evaporator models.

RLC-PRC016-EN4

RTAA 70-125 Chiller Highlights Years of research, testing, and

successful applications. The Trane helicalrotary compressor has amassedthousands of hours of testing, much of itat severe operating conditions. Not tomention, the successful application ofRTAA chillers since 1994, with adeveloped reputation as the industrystandard.

Trouble free startup through factorytesting of compressor and completedchiller and factory installation of chilleraccessories.

High compressor reliability andAdaptive Control to keep the chiller online producing cold water duringadverse conditions. Small footprint, withsmallest required application space(operating footprint) in the industry.

Small footprint, with smallest requiredapplication space (operating footprint) inthe industry.

Low sound levels and accessoryoptions for sound sensitive applications.

F leaving water temperaturecontrol (0.3C), resulting from PID feed-forward controls, and linear loadmatching, also allowing for 10% flowrate change per minute whilemaintaining F leaving watertemperature control.

Reliability Proven Trane helical rotary screw

compressor design for longer life andgreater dependability.

Adaptive Control protects the chillerwhen any of the system variablesapproaches a limit condition that maydamage the unit or cause a shutdown.The Unit Control Module takescorrective action to keep the unitrunning.

Dual circuit design increases overallsystem reliability.

Unlike reciprocating designs, thiscompressor can handle liquid slugging.

Designed To Perform, Built To Last

Performance High efficiency with all units complying

with the ASHRAE 90.1 efficiencystandard.

Excellent part load performance isachieved without resorting tomanifolded multiple reciprocating orscroll compressors.

Use of an electronic expansion valvesignificantly improves part loadperformance by minimizing superheatin the evaporator and allowing thechiller to run at reduced condensingtemperatures.

Unique compressor sequencingequalizes not only starts, but operatinghours as well.

Trouble-Free Operation and Start-Up With Adaptive Controls, there are fewer

nuisance trips meaning less expensefrom unnecessary service calls.

Factory installed and tested optionskeep start-up time and expensesminimized.

Easy interface capability with the TraneIntegrated Comfort system via asingle twisted pair of wires.

Enhanced interface capability withLonTalk compatible building automationsystems with our expanded list LonTalkcontrol points.

Optional remote display panel simplifieschiller monitoring/ control.

Packed stock availability for your quickreplacement needs.

Features andBenefits

5RLC-PRC016-EN

Features andBenefits

Series R Compressor Highlights Direct-drive, low speed for high

efficiency and reliability. Simple design with only four moving

parts, resulting in high reliability and lowmaintenance.

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 allows forcloser water loop temperature control.

Robust PartsHelical rotary compressors are preciselymachined using state of the art processesfrom solid metal bar stock. Tolerances aremaintained within 10 micron or less thana tenth of the diameter of a human hair.The resulting compressor is a robust yethighly sophisticated assembly capable ofingesting liquid refrigerant without risk ofdamage. Contrast this to a reciprocatingcompressor, which can be destroyed by asingle slug of liquid.

Precise Rotor Tip ClearancesHigher energy efficiency in a helical rotarycompressor is obtained by reducing therotor tip clearances. This reduces theleakage between high and low pressurecavities during compression. Precise rotortip clearance is achieved with the latestmanufacturing and machining technology.Trane was the first helical rotarycompressor manufacturer toelectronically check compressor partsmachining accuracy as part of thestandard production process.

Optimized Compressor Parts ProfilesRotor and slide valves are unique designs,optimized for the air conditioningapplication. The rotors are designed forthe pressure ranges in the air conditioningapplication. The unloader valve has aunique profile that resulted fromcomputer performance modeling intypical part-load situations.

Cutaway of a helical rotary screw compressor

Exceptional Part Load PerformanceThe air-cooled Series R chiller has greatpart-load performance. The patentedcombination unloading system on thecompressor utilizes the variableunloading valve for the majority of theunloading function similar to that of theslide valve. The compressor also uses astep unloader valve which is a singleunloading step to achieve the minimumunloading point of the compressor. Theresult of both of these designs isoptimized part-load performance farsuperior to single reciprocating or scrollcompressors.

Advanced Heat Transfer SurfacesCondenser and evaporator tubes use thelatest heat transfer technology forincreased efficiency.

RLC-PRC016-EN6

Features andBenefits

The 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 Rperformance.

Some of the major advantages of theModel RTAA 70-125 vs its largerpredecessor are: Higher energy efficiency Lower sound levels Smaller physical footprint

The Series R Model RTAA 70-125 is anindustrial grade design built for both theindustrial and commercial markets. It isideal for schools, hospitals, retailers, officebuildings, Internet service providers andindustrials.

ASHRAE Standard 90.1 and RTAA 70-125 World Class Energy EfficiencyThe importance of energy efficiencycannot be understated. Fortunately,ASHRAE has created a guidelineemphasizing its importance. Nonetheless,energy is often dismissed as anoperational cost over which the ownerhas little control. That perception resultsin missed opportunities for energyefficiency, reduced utility bills, and higherprofits. Lower utility bills directly affectprofitability. Every dollar saved in energygoes directly to the bottom line. TranesRTAA 70-125 is one way to maximizeyour profits.

ASHRAE Standard 90.1 & ExecutiveOrder - New technology applied to thedesign, controls, and manufacturing havecreated superior efficiency levels in theRTAA 70-125 that are unmatched in theindustry. All Trane air-cooled chillers meetthe new efficiency levels mandated byASHRAE Standard 90.1. This newstandard requires higher efficiencies thanpast technologies can deliver. The USFederal Government has adoptedstandard 90.1 and, in some cases,

requires even higher efficiencies.Federal Executive Order mandatesenergy consuming devices procuredmust be in the top 25% of their class or beat least 10% better than any productstandard for that product. In the case ofchillers, that product standard is ASHRAE90.1. Tranes RTAA 70-125 meets orexceeds the efficiency requirements of90.1, with some units meeting thestretch goals of Executive Order.

Risk. The US Federal Government hasadopted ASHRAE 90.1, and its expectedto be adopted domestically, if not globally,in the future. Domestic acceptance hasalready begun. Make sure that yourchillers as well as your entire HVACsystem complies, or you may be caughtretrofitting your project with newequipment and paying extra designdollars if the code is adopted duringconstruction.

Efficiency

Efficiencies given for 60 Hz units.

7RLC-PRC016-EN

Trouble-Free Start-UpAll air-cooled Series R chillers are givena complete functional test at the factory.This computer-based test programcompletely checks the sensors, wiring,electrical components, microprocessorfunction, communication capability,expansion valve performance and fans.In addition, each compressor is run testedto verify capacity and powerconsumption. The end result of this testprogram is that the chiller arrives at thejobsite fully tested and ready to go towork.

Quick InstallationAll Series R chiller options, includingcontrol power transformer, starterdisconnect, low ambient control, ambienttemperature sensor, low ambient lockout,communication interface and ice makingcontrols are factory installed and tested.Some manufacturers send options inpieces to be field installed. With Trane, thecustomer saves on installation expenseand has assurance that ALL chillercontrols/options have been tested andwill function as expected.

Close Spacing Of ChillerThe air-cooled Series R chiller has thetightest recommended side clearance inthe industry, four feet, but that is not all. Insituations where equipment must beinstalled with less clearance thanrecommended, which frequently occursin retrofit and rooftop applications,restricted air flow is common.Conventional chillers may not work at all.However, the air-cooled Series R chillerwith Adaptive Control microprocessorwill simply make as much chilled water asit can, given the actual installedconditions, stay on line during anyunforeseen abnormal conditions, andoptimize its performance. Consult yourTrane sales engineer for more details.

Features andBenefits Installation

RLC-PRC016-EN8

Features andBenefits

Hydronic Pumping PackageUnit Performance Testing

The ARI Certification Program has had acertification program covering air-cooledwater chillers for many years. With this inmind, customers may ask, Do I need tofactory performance test my chiller?

Trane began promoting factoryperformance tests for water-cooledwater chillers in 1984 for the samereasons it is valid today for air-cooledwater chillers, to show we stand behindthe products we design and build.

The benefits of a performance testinclude verification of performance,prevention of operational problems, andassurance of a smooth start-up. Only aperformance test conducted in alaboratory or laboratory grade facility willconfirm both performance and operationof a specific chiller.

While most factory performance tests gosmoothly, should problems occur, Tranepersonnel can quickly correct them andthe chiller will ship as specified. Job sitediagnosis, ordering of parts, and waitingfor delivery of replacement componentsis significantly reduced.

A factory performance test reduces start-up time, thereby saving job site expense.A chiller that has been tested is operationand performance-proven. This allows theinstalling contractor to concentrate onproper electrical wiring and water piping,and the service technicians toconcentrate on proper refrigerant charge,safeties diagnosis and initial logging ofthe chiller. Means of obtaining full load onthe chiller and proving its performance donot have to be determined by engineersor contractors, thus saving time. Thecertified test report documentsperformance for the unit as built. Inaddition, factory testing significantlyreduces commissioning time and risk byre-introducing manufacturerresponsibility, where its mitigation shouldreside.

When a factory performance test isrequested, the test can be conducted atthe specified, design conditions. The testfacility has the capability to controlambient test conditions to assure ourcustomers that our chillers will performas predicted.

The integrated pumping package optionon RTAA chillers is the achievement ofthoughtful design and a close, workingrelationship with our supplier. These pre-engineered (460/60/3 only) packages willrun off of the chillers incoming powersupply and incorporate seamlessly intothe unit control schemes. This option hasbeen designed to operate over a widerange of conditions and has been testedto ensure automatic control capabilitiessuch as lead/lag, failure/recovery andproof of flow with an incorporateddifferential pressure switch.

The integrated pumping packageprovides a time saving and cost effectivesolution to customers wanting ancillaryequipment selected, installed and pre-tested by the factory. The correctpumping package will be chosen via theRTAA selection program based upon thetotal dynamid head and the specific flowrate for the application, reducing theconsulting engineers time on managingand selecting pumps for the chilled waterloop. Package installation and completeunit testing are efficiently done in thefactory, saving valuable time and labor atthe jobsite. In addition, customers canwitness the unit and pumping packagebeing tested in the Air-cooled Run TestFacility in Pueblo, Colorado.

AdvancedAbilities

Air-cooled Run Test Facility shown with an RTAC 500 ton unit

9RLC-PRC016-EN

Features andBenefits

The RTAA 70-125 chiller offers advancedmicroprocessor control and featuresAdaptive Control. Adaptive Controlmeans the Unit Control Module (UCM)directly senses the control variables thatgovern operation of the chiller andprovides better control than past controlsas well as several important benefits.

Adaptive Control MicroprocessorThe microcomputer-based controllerallows Trane to optimize controls aroundthe chiller application and the specificcomponents used in the air-cooled SeriesR chiller. For instance, the compressorprotection system is specifically designedfor the air-cooled Series R chiller. A newleaving chilled water temperature controlalgorithm maintains accuratetemperature control, minimizes the driftfrom setpoint and provides better buildingcomfort. This control, combined with linearcompressor unloading, also allows thechiller to be applied in a wider array ofapplications, including variable primaryflow.

The microcomputer control incorporatesimproved chiller start-up, load limiting,lead/lag, and compressor run timeequalization functions into standard chilleroperation. Interface with outside systemssuch as building automation controls isflexible and easy.

When any of the chiller control variablessuch as motor current draw, evaporatortemperature and condenser temperatureapproaches a limit condition where theunit may be damaged or shut down on asafety, the UCM takes corrective action toavoid shutdown and keep the chilleroperating. It does this through combinedactions of compressor slide valvemodulation, electronic expansion valvemodulation and fan staging. Additionally,the UCM optimizes total unit powerconsumption during normal operatingconditions. No other chiller control systemin the marketplace duplicates thisperformance.

The End Of Most Nuisance TripsUnnecessary service calls and unhappytenants are reduced. Only when the UCMhas exhausted the corrective actions itcan take and the unit is still violating anoperating limit will the unit shut down.Controls on other chillers typically shutdown the chiller, quite possibly just whenit is needed the most.

For example:A typical five-year-old chiller with dirtycoils might trip-out on high pressurecutout on a 100F (37.8C) day in August.A hot day is just when comfort cooling isneeded the most. In contrast, the air-cooled Series R chiller with an AdaptiveControl microprocessor will stage fanson, modulate electronic expansion valve,and modulate slide valve as itapproaches a high pressure cutout.Thereby keeping the chiller on-line justwhen you need it the most.

Lower Service ExpenseNuisance service calls are avoided. Whenthere is a real problem that must becorrected, the UCMs extensivediagnostics help assure that the problemis quickly identified. Down time andservice expense are minimized. And withthe ability to communicate with the TraneIntegrated Comfort system or a remotedisplay panel, service problems can beidentified and diagnosed remote to theinstallation.

AdaptiveControl

RLC-PRC016-EN10

Features andBenefits PID Control

Electronic Expansion ValveWhen coupled with Tranes AdaptiveControl microprocessor, our electronicexpansion valve significantly improvespart-load performance of the Series Rchiller by minimizing superheat in theevaporator and allowing the chiller to runat reduced condensing temperatures.Chillers which use conventional TXVsmust run at higher head pressures andconsume more power than necessary atpart-loads. Additionally, the electronicexpansion valve and its controls allowmuch better stability and control overdynamic load and head changes. Underthese conditions a conventional TXV maynever achieve control stability andextended periods of TXV hunting andliquid slugging are common.

Precise ControlTranes patented unloading systemallows the compressor to modulateinfinitely and exactly match buildingloads. At the same time maintainingchilled water temperature control hasnever been so accurate or so easy. Forprocess cooling jobs where temperaturesare critical, Trane provides chilled waterwithin 1/2F (0.3C) of setpoint viaproportional integral differential (PID)control. Reciprocating, scroll and screwchillers with stepped capacity controltypically can only maintain chilled watertemperatures within 2F (1.1C) ofsetpoint.

Reduce Compressor CyclingModulating capacity control offers bettercompressor reliability. Compressorcycling, typical of reciprocatingcompressors, will decrease compressorcomponent life. Parts like motors andvalves do not stand up well to excessivecompressor cycling.

Stepped control also results inovercooling or undercooling your spacebecause rarely does the capacity of themachine match the building load. Theresult can be 10% higher energy bills.Tranes RTAA optimizes the part loadperformance of your machine for energyefficiency, precise temperature controlfor all modes of operation, and yourpersonal comfort regardless of changingconditions.

11RLC-PRC016-EN

Features andBenefits

Unit Control Module (UCM)Tranes Adaptive Controlmicroprocessor control system enhancesthe air-cooled Series R chiller byproviding the very latest chiller controltechnology.

State-of-the-Art EquipmentThe 70 to 125 ton air-cooled chillers offerthe exclusive Trane Adaptive Controllogic with the Clear Language Display(UCM). The Clear Language Display hasvarious functions that allow the operatorto read unit information and adjustsetpoints. The Clear Language Displaypanel has 16 keys, the readout screen is atwo-line, 40 character liquid crystal with abacklight. The backlight allows theoperator to read the display in low-lightconditions.

Equal Compressor SequencingTrane maximizes both compressor andmotor life by equalizing both the numberof starts and the operating hours. TheUCM will start the compressor with theleast number of starts and turn off thecompressor with the most operatinghours. Conventional auto lead-lagcontrol will equalize starts, but runninghours will typically be unequal. Equalizingboth starts and running hours will provideequal compressor wear.

Internal Built-In Chiller Flow ProtectionThe UCM automatically detects a nowaterflow condition. An external flowswitch is not required, which lowers costsversus typical chillers. Built-in flowprotection also eliminates nuisance flowswitch problems.

Remote Clear Language Display Panelfor 70 to 125-ton air-cooled chillers.

Remote Display PanelTrane air-cooled Series R 70-125 tonchillers are available with a twisted pairconnection to an optional remote displaypanel. Chiller operation can be controlledsimilarly to the control interface on thechiller itself. Through a twisted pair ofwires the unit can be turned on or off,change the chilled water setpoint, anddisplay over 90 operating and diagnosticconditions. The remote display panel canbe mounted indoors so access to chillerinformation is just steps away, eliminatingany need to go outdoors or on the roof.

The clear language display for chiller sizesof 70-125 tons has the ability to controlmultiple units. In a multiple unitconfiguration, the Remote ClearLanguage Display Panel has thecapability to communicate with up to fourunits. Each unit requires a separatecommunication link with the RemoteDisplay Panel.

Unit Control

RLC-PRC016-EN12

Controls

Safety ControlsA centralized microprocessor offers ahigher level of machine protection. Sincethe safety controls are smarter, they limitcompressor loading to avoid compressoror evaporator failures, therebyminimizing nuisance shutdown. The UnitControl Module (UCM) directly senses thecontrol variables that govern the loadingof the chiller: motor current draw,evaporator temperature, condensertemperature, etc. When any one of thevariables approaches a limit conditionwhere the unit may be damaged orshutdown on a safety, the UCM takescorrective action to avoid shutdown andkeep the chiller operating. The UCMoptimizes total chiller power consumptionduring normal operating conditions.During abnormal operating conditions,the UCM will continue to optimize chillerperformance by taking the correctiveaction necessary to avoid shutdown. Thiskeeps cooling capacity available until theproblem can be solved.

Whenever possible, the chiller is allowedto perform its function; make chilledwater. In addition to Adaptive Controls,microcomputer controls allow for moretypes of protection such as over andunder voltage. Overall, the safetycontrols help keep the building runningand out of trouble.

Monitoring And DiagnosticsSince the microcomputer provides allcontrol functions, it can easily indicatesuch parameters as leaving chilled watertemperature and capacity stage.If a failure does occur, one of over 90individual diagnostic and operating codeswill be used to indicate the problem,giving more specific information aboutthe failure. All of the monitoring anddiagnostic information is displayeddirectly on a microcomputer display.

Easy Chiller System LoggingThe UCM displays data required to logthe chiller system. The followinginformation is available either asstandard or as an option with the Air-Cooled Series R Chiller microprocessor: Entering and leaving chilled water

temperatures Ambient air temperature Evaporator and condenser refrigerant

temperatures and pressures Compressor suction temperature Percent RLA for each compressor Percent line voltage Compressor starts and running hours Active setpoints:

chilled water setpointcurrent limit setpointice termination setpointlow ambient lockout setpoint

Over 90 diagnostic and operatingconditions

Part failure diagnostics:water temperature sensorsrefrigerant temperature sensorscompressor contactors

Air-cooled Series R chillers can interfacewith many different external controlsystems, from simple stand- alone unitsto ice making systems. Each unit requiresa single-source, three-phase powersupply and a single-phase 115V/60Hz,220V/50Hz power supply. The addedsingle-phase power supply powers theevaporator heaters. For basic stand-alone applications, the interface withoutside control is no different than forother Trane chillers. However, the RTAAunits have many features that can beused to interface with building controlsystems.

Stand-alone UnitInterface to stand-alone units is verysimple; only a remote auto/stop forscheduling is required for unit operation.Signals from the chilled water pumpcontactor auxiliary or a flow switch arewired to the chilled waterflow interlock.Signals from a timeclock or some otherremote device are wired to the externalauto/stop input.

Standard Features

1. External Auto/StopA jobsite provided contact closure willturn the unit on and off.

Note: Do not use the chilled waterpump to stop the chiller.

2. Chilled Waterflow InterlockA jobsite provided contact closure from achilled water pump contactor or a flowswitch is required and will allow unitoperation if a load exists. This feature willallow the unit to run in conjunction withthe pump system.

3. External InterlockA jobsite supplied contact opening wiredto this input will turn the unit off andrequire a manual reset of the unitmicrocomputer. This closure is typicallytriggered by a jobsite supplied systemsuch as a fire alarm.

4. Chilled Water Pump ControlUnit controls provide an output to controlchilled water pump(s). One contactclosure to the chiller is all that is requiredto initiate the chilled water system.

5. Remote Running and Alarm IndicationContactsThe unit provides three single-pole/double-throw contact closures to indicatethat a failure has occurred, if anycompressors are running, or if thecompressors are running at maximumcapacity. These contact closures may beused to trigger jobsite supplied alarmlights or alarm bells.

Stand-alone

13RLC-PRC016-EN

The remote display option allows theoperator to monitor chiller operation froma remote location. Over 60 essentialchiller operating parameters can betransmitted between the unit controlmodule on the chiller and the remotedisplay via a bi-directionalcommunications link. Only one twistedwire pair is required between the chillerand the remote display. In addition tomonitoring chiller operation, alarms andunit diagnostics can be read from theremote display. Furthermore, the chilledwater temperature setpoint can beadjusted and the chiller can be turned onor off from the remote display.

Required Features

1. Communications Interface

Additional Features That May Be Used

1. External Interlock (Standard)

2. Chilled Water Temperature Reset

3. Chilled Waterflow Interlock (Standard)

4. Remote Running and FailureIndication Contacts

External Trane Devices Required

1. Remote Display Panel

Controls Remote Display

RLC-PRC016-EN14

Trane Chiller Plant ControlThe Tracer Summit Chiller Plant BuildingManagement System with Chiller PlantControl provides building automation andenergy management functions throughstand-alone control. The Chiller PlantControl is capable of monitoring andcontrolling your entire chiller plantsystem.

Application software available: Time-of-day scheduling Demand limiting Chiller sequencing Process control language Boolean (binary) processing Zone control Reports and logs Custom messages Run time and maintenance Trend log PID control loopsAnd of course, the Trane Chiller PlantControl can be used on a stand-alonebasis or tied into a complete buildingautomation system.

When the air-cooled Series R 70-125 tonchiller is used in conjunction with a TraneTracer Summit system, the unit can bemonitored and controlled from a remotelocation. The air-cooled Series R 70-125ton chiller can be controlled to fit into theoverall building automation strategy byusing time of day scheduling, timedoverride, demand limiting, and chillersequencing. A building owner cancompletely monitor the air-cooled SeriesR 70-125 ton chiller from the Tracersystem, since all of the monitoringinformation indicated on the unitcontrollers microcomputer can be readoff the Tracer system display. In addition,all the powerful diagnostic informationcan be read back at the Tracer system.Best of all, this powerful capability comesover a single twisted pair of wires!

Control functions include auto/stop,adjustment of leaving water temperaturesetpoint, compressor operation lockout forkW demand limiting and control of icemaking mode. The Tracer system readsmonitoring information such as entering

Controls

Modem

Remote PC Workstation PC Workstation NotebookPC Workstation

LAN

BuildingControl Unit

BuildingControl Unit

VariTrane

Variable Air VolumeTerminal

Room temperaturesensor Diffuser

VariTrane

Variable Air VolumeTerminal

Room temperaturesensor Diffuser

Exhaust Fan

Air-cooled Series R Chiller

Modular Climate Changer

Air Handler

and leaving evaporator watertemperatures and outdoor airtemperature. Over 60 individualdiagnostic codes can be read by theTracer system. In addition, the Tracersystem can provide sequencing controlfor up to 25 units on the same chilledwater loop. Pump sequencing control canbe provided from the Tracer system.Tracer ICS is not available in conjunctionwith the remote display or the externalsetpoint capability.

Required FeaturesTracer Interface

Additional Options That May Be UsedIce Making Control

External Trane Devices RequiredTracer Summit, Tracer 100 System orTracer Chiller Plant Control

Tracer Summit

15RLC-PRC016-EN

Controls Tracer Summit

Trane Chiller Plant AutomationTranes depth of experience in chillers andcontrols makes us a well-qualified choicefor automation of chiller plants using air-cooled Series R chillers. The chiller plantcontrol capabilities of the Trane TracerSummit building automation system areunequaled in the industry. Our chiller plantautomation software is fully pre-engineered and tested. It is a standardsoftware application, not customprogramming which can prove to bedifficult to support, maintain, and modify.

Energy EfficiencyTrane chiller plant automation intelligentlysequences starting of chillers to optimizethe overall chiller plant energy efficiency.Individual chillers are designated tooperate as base, peak, or swing based oncapacity and efficiency. Sophisticatedsoftware automatically determines whichchiller to run in response to currentconditions. The software alsoautomatically rotates individual chilleroperation to equalize runtime and wearbetween chillers.

Trane chiller plant automation enablesunique energy-saving strategies. Anexample is controlling pumps, and chillersfrom the perspective of overall systemenergy consumption. The softwareintelligently evaluates and selects thelowest energy consumption alternative.

Regulatory Compliance DocumentationComprehensive documentation ofrefrigerant management practices is nowa fact of life. Trane chiller plant automationgenerates the reports mandated inASHRAE Guideline 3.

Keeping Operators InformedA crucial part of efficiently running achiller plant is assuring that theoperations staff is instantly aware ofwhat is happening in the plant. Graphicsshowing schematics of chillers, piping,pumps, and towers clearly depict thechiller plant system, enabling buildingoperators to easily monitor overallconditions. Status screens display bothcurrent conditions and upcomingautomated control actions to add orsubtract chiller capacity. Series R andother chillers can be monitored andcontrolled from a remote location.

Tracer Summit features standard reporttemplates listing key operating data fortroubleshooting and verifyingperformance. Reports for each type ofTrane chiller and three and six-chillersystems are also standard. Detailedreports showing chiller runtimes aid inplanning for preventative maintenance.

Swift Emergency ResponseWe understand the importance ofmaintaining chilled water productionwhile protecting your chillers from costlydamage. If no water flow is detected to achillers piping, the start sequence isaborted to protect the chiller. The nextchiller in the sequence is immediatelystarted to maintain cooling.

In the event of a problem, the operatorreceives an alarm notification anddiagnostic message to aid in quick andaccurate troubleshooting. A snapshotreport showing system status just prior toan emergency shutdown helps operatorsdetermine the cause. If emergencyconditions justify an immediate manualshutdown, the operator can override theautomatic control.

Integrated Comfort CapabilitiesWhen integrated with a Tracer Summitbuilding management systemperforming building control, Trane chillerplant automation coordinates with TracerSummit applications to optimize the totalbuilding operation. With this systemoption, the full breadth of Tranes HVACand controls experience are applied tooffer solutions to many facility issues. Ifyour project calls for an interface to othersystems, Tracer Summit can share datavia BACnet, the ASHRAE open systemsprotocol.

RLC-PRC016-EN16

Controls

Microcomputer controls afford simpleinterface with other control systems, suchas time clocks, building automationsystems and ice storage systems. Thismeans you have the flexibility to meet jobrequirements while not having to learn acomplicated control system. This setuphas the same standard features as astand-alone water chiller, with thepossibility of having the following optionalfeatures.

Easy Interface to A Generic BuildingManagement SystemControlling the air-cooled Series R chillerwith building management systems isstate-of-the-art, yet simple with BACnetwith Tracer Summit, LonTalk ChillerInterface or generic buildingmanagement system hardwire points.

LonTalk Chiller ControlsLonTalk Communications Interface forChillers (LCI-C) provides a genericautomation system with the LonMarkchiller profile inputs/outputs. In addition tothe standard points, Trane provides othercommonly used network output variablesfor greater interoperability with anyautomation system.

LonTalk is a communications protocoldeveloped by the Echelon Corporation.The LonMark association developscontrol profiles using the LonTalkcommunication protocol. LonTalk is a unitlevel communications protocol, unlikeBACNet used at the system level.

Additional Outputs: Evaporator Water Pump Request Evaporator Refrigerant Temperature Evaporator Refrigerant Pressure Condenser Refrigerant Temperature Condenser Refrigerant Pressure Outdoor Air Temperature Condenser Air Flow Condenser Fan Status Compressor Running Maximum Capacity Status Current Per Line Voltage Per Phase Oil Temperature Per Compressor Compressor Starts Compressor Run Time

Trane controls or another vendorssystem can use these points with ease togive the operator a complete picture ofhow the system is running.

Hardwire Points

Chiller inputs include: Chiller enable/disable Circuit enable/disable Chilled water setpoint Current limit setpoint Ice making enable

Chiller outputs include: Compressor running indication Alarm indication (CKt 1/CKt2) Maximum capacity

Alarm Indication ContactsThe unit provides three single-pole/double-throw contact closures to indicatethat a failure has occurred, compressoron/off status, or if the compressors arerunning at maximum capacity. Thesecontact closures may be used to triggerjobsite supplied alarm lights or alarmbells.

SystemIntegration

External Chilled Water SetpointAllows the external setting independentof the front panel setpoint by one of twomeans:a) 2-10 VDC inputb) 4-20 mA input

External Current Limit SetpointAllows the external setting independentof the front panel setpoint by one of twomeans:a) 2-10 VDC inputb) 4-20 mA input

Ice Making ControlProvides interface with ice making controlsystems.

Chilled Water Temperature ResetReset can be based on return watertemperature or outdoor air temperature.

17RLC-PRC016-EN

Controls

Ice Making SystemsSimple and smart control strategies areanother advantage the Model RTAAchiller offers for ice storage applications.Trane Tracer building managementsystems can actually anticipate how muchice needs to be made at night and operatethe system accordingly. The controls areintegrated right into the chiller. Two wiresand preprogrammed softwaredramatically reduce field installation costand complex programming.

When the ice making option is ordered,the air-cooled Series R chiller will havetwo operating modes, ice making andnormal daytime cooling. In the ice makingmode, the air-cooled Series R chiller willoperate at full compressor capacity untilthe return chilled fluid temperatureentering the evaporator meets the icemaking setpoint. This ice making setpointis manually adjusted on the unitsmicrocomputer. Two input signals arerequired to the air-cooled Series R chillerfor the ice making option. The first is an

Thermal Storage

auto/stop signal for scheduling and thesecond is required to switch the unit inbetween the ice making mode andnormal daytime operation. The signalsare provided by a remote job site buildingautomation device such as a time clock ora manual switch. In addition, the signalsmay be provided over the twisted wirepair from a Tracer system or LonTalkCommunication Interface.

Required Features

1. External Auto/Stop (Standard)

2. Ice Making Control

Additional Features That May Be Used

1. Remote Running and Failure IndicationContacts

2. Communications Interface (For TracerSystems)

3. Chilled Water Temperature Reset(Indoor zone reset not available withice making option).

External Trane Devices Required None

RLC-PRC016-EN18

Certain application constraints should beconsidered when sizing, selecting andinstalling Trane air-cooled Series Rchillers. Unit and system reliability is oftendependent upon properly and completelycomplying with these considerations.Where the application varies from theguidelines presented, it should bereviewed with your local Trane salesengineer.

Unit SizingUnit capacities are listed in theperformance data section. Intentionallyoversizing a unit to assure adequatecapacity is not recommended. Erraticsystem operation and excessivecompressor cycling are often a directresult of an oversized chiller. In addition,an oversized unit is usually moreexpensive to purchase, install, andoperate. If oversizing is desired, considerusing two units.

Unit Placement

1. Setting The UnitA base or foundation is not required if theselected unit location is level and the baseis strong enough to support the unitsoperating weight as listed in Tables W-1and W-2.

2. Isolation and Sound EmissionThe most effective form of isolation is tolocate the unit away from any sound-sensitive area. Structurally transmittedsound can be reduced by ELASTOMERICvibration eliminators. Spring isolatorshave proven to be of little benefit on air-cooled Series R chiller installations andare not recommended. An acousticalengineer should always be consulted incritical sound applications.

For maximum isolation effect, water linesand electrical conduit should also beisolated. Wall sleeves and rubber isolatedpiping hangers can be used to reduce thesound transmitted through water piping.To reduce the sound transmitted throughelectrical conduit, use flexible electricalconduit.

State and local codes on sound emissionsshould always be considered. Since theenvironment in which a sound source islocated affects sound pressure, unitplacement must be carefully evaluated.Sound power levels for Trane air-cooledSeries R chillers are available onrequest.

3. ServicingAdequate clearance for evaporator andcompressor servicing should beprovided. Recommended minimumspace envelopes for servicing are locatedin the dimensional data section and canserve as a guideline for providingadequate clearance. The minimum spaceenvelopes also allow for control panelswing and routine maintenancerequirements. Local code requirementsmay take precedence.

4. Unit Location

a. GeneralUnobstructed flow of condenser air isessential to maintain chiller capacity andoperating efficiency. When determiningunit placement, careful considerationmust be given to assuring a sufficientflow of air across the condenser heattransfer surface. Two detrimentalconditions are possible and must beavoided if optimum performance is to beachieved: warm air recirculation and coilstarvation.

Warm air recirculation occurs whendischarge air from the condenser fans isrecycled back to the condenser coil inlet.Coil starvation occurs when free airflowto (or from) the condenser is restricted.

Both warm air recirculation and coilstarvation cause reductions in unitefficiency and capacity because of thehigher head pressures associated withthem. The air-cooled Series R chilleroffers an advantage over competitiveequipment in these situations.Performance is minimally affected inmany restricted air flow situations due toits unique condensing coil geometry. Also,through its advanced Adaptive Controlmicroprocessor logic, the chiller willattempt to stay on-line wherecompetitive chillers would usually shutdown.

Tranes unique Adaptive Controlmicroprocessor has the ability tounderstand the operating environment ofthe chiller and adapt to it by firstoptimizing its performance and second,staying on line through abnormalconditions. For example, high ambienttemperatures combined with a restrictedair flow situation will generally not causethe air-cooled Series R chiller to shutdown. Competitive chillers would typicallyshut down on a high pressure nuisancecut-out in these conditions.

Debris, trash, supplies, etc. should not beallowed to accumulate in the vicinity ofthe air-cooled Series R chiller. Supply airmovement may draw debris into thecondenser coil, blocking spaces betweencoil fins and causing coil starvation.

Special consideration should be given tolow ambient units. Condenser coils andfan discharge must be kept free ofobstructions to permit adequate airflowfor satisfactory unit operation.

ApplicationConsiderations

19RLC-PRC016-EN

ApplicationConsiderations

b. Provide Vertical ClearanceVertical condenser air discharge must beunobstructed. While it is difficult to predictthe degree of warm air circulation, a unitinstalled as shown on the left would haveits capacity and efficiency significantlyreduced. Performance data is based onfree air discharge.

c. Provide Lateral ClearanceThe condenser coil inlet must not beobstructed. A unit installed closer than theminimum recommended distance to awall or other vertical riser mayexperience a combination coil starvationand warm air recirculation, resulting inunit capacity and efficiency reductions.Once again, the Adaptive Controlmicroprocessor will allow the chiller tostay on line, producing the maximumavailable capacity, even at less thanrecommended lateral clearances.The recommended lateral clearances aredepicted in the dimensional data section.These are estimates and should bereviewed with the local Trane salesengineer at the jobsite.

d. Provide Sufficient Unit-to-UnitClearanceUnits should be separated from eachother by a sufficient distance to preventwarm air recirculation or coil starvation.The air-cooled Series R chiller has thelowest recommended unit-to-unitclearance in the industry, eight feet.Consult the local Trane sales engineer forapplications concerning close spacingand restricted airflows.

e. Walled Enclosure InstallationsWhen the unit is placed in an enclosure orsmall depression, the top of the fansshould be no lower than the top of theenclosure or depression. If they are,consideration should be given to ductingthe top of the unit. Ducting individual fans,however, is not recommended. Suchapplications should always be reviewedwith the local Trane sales engineer.

RLC-PRC016-EN20

ApplicationConsiderations

Effect Of Altitude On CapacityAir-cooled Series R chiller capacitiesgiven in the performance data tables, P-1through P-4, are for use at sea level. Atelevations substantially above sea level,the decreased air density will decreasecondenser capacity and, therefore, unitcapacity and efficiency. The adjustmentfactors in Table F-1 can be applied directlyto the catalog performance data todetermine the units adjustedperformance.

Ambient LimitationsTrane air-cooled Series R chillers aredesigned for year-round applicationsover a range of ambients. Chillers from70-125 tons offer operation for ambientsfrom 25 to 125F (-3.9 to 51.7C) asstandard , and will operate down to -10F(-23.3C) with the low ambient option.

The minimum ambient temperatures arebased on still conditions (winds notexceeding five mph). Greater windvelocities will result in a drop in headpressure, therefore increasing theminimum starting and operating ambienttemperature. Once again, the AdaptiveControl microprocessor will attempt tokeep the chiller on-line when high or lowambient conditions exist, making everyeffort to avoid nuisance trip-outs andprovide the maximum allowabletonnage.

Water TreatmentDirt, scale, products of corrosion andother foreign material will adverselyaffect heat transfer between the waterand system components. Foreign matterin the chilled water system can alsoincrease pressure drop and,consequently, reduce waterflow. Properwater treatment must be determinedlocally, depending on the type of systemand local water characteristics.

Neither salt nor brackish water isrecommended for use in Trane air- cooledSeries R chillers. Use of either will leadto a shortened life to an indeterminabledegree. Trane encourages theemployment of a reputable watertreatment specialist, familiar with localwater conditions, to assist in thisdetermination and in the establishment ofa proper water treatment program.

The capacities given in the performancedata section of this catalog are based onwater with a fouling factor of .00010 hr-sq.ft.-F/Btu (0.0176 sq. m-C/ton). Forcapacities at other fouling factors, seeadjustment factors in Table F-1.

Waterflow LimitsThe minimum waterflow rates are givenin General Data Table G-1. Evaporatorflow rates below the tabulated values willresult in laminar flow causing freeze-upproblems, scaling, stratification and poorcontrol.

The maximum evaporator waterflowrate is also given in the general datasection. Flow rates exceeding those listedmay result in excessive tube and baffleerosion.

The evaporator can withstand up to 50percent water flow reduction as long asthis flow is equal or above the minimumgpm requirements.

Variable Evaporator Flow andShort Evaporator Water LoopsAir-cooled Series R chillers have thecapability to handle variable evaporatorflow without losing leaving watertemperature control. Flow rates can bevaried up to 10% of design withoutdecreasing the leaving watertemperature control capabilities.

Variable evaporator flow is an energy-saving design strategy which has quicklygained acceptance as advances in chillerand controls technolgy have made itpossible. With its linear unloadingcompressor desin and advanced UCMcontrols, the RTAA Series R chiller hasexcellent capability to maintain leavingwater temperature control within +/-0.5F, even for systems with variableevaporator flow and small chilled watervolumes.

Some basic rules should be followedwhenever using these system design andoperational savings methods. The properlocation of the chilled water temperaturecontrol sensor is in the supply (outlet)water. This location allows the building toact as a buffer, and it assures a slowlychanging return water temperature. Ifthere is insufficient water volume in thesystem to provide an adequate buffer,temperature controls can be lost,

resulting in erratic system operation andexcessive compressor cycling. To ensureconsistent operation and tighttemperature control, the chilled waterloop should be at least two minutes. Ifthis recommendation cannot be followed,and tight leaving water temperaturecontrol is necessary, a storage tank orlarger header pipe should be installed toincrease the volume of water in thesystem.

Temperature Limits

1. Leaving Water Temperature Range

Trane air-cooled Series R chillers havethree distinct leaving water categories:standard, low temperature, and icemaking.

The standard leaving water temperaturerange is 40 to 65F (4.4 to 18.3C). Lowtemperature machines produce leavingwater temperatures between 0 and 39F(-17.8 to 3.9C). Since water supplytemperature setpoints below 40F resultin suction temperatures at or below thefreezing point of water, a glycol solution isrequired for all low temperaturemachines. Ice making machines have aleaving water temperature range of 20 to65F (-6.7 to 18.3C). Ice making controlsinclude dual setpoint controls and safetiesfor ice making and standard coolingcapabilities.

The maximum water temperature thatcan be circulated through an evaporatorwhen the unit is not operating is 108F(42.2C). The evaporator becomesthermal stress limited at thistemperature.

2. Supply Water Temperature Drop

The performance data for the Trane air-cooled Series R chiller is based on achilled water temperature drop of 10F(5.6C) Temperature drops outside thisrange will result in unit performance thatdiffers from that cataloged. Forperformance data outside the 10F range,see Table F-1 for adjustment factors.Chilled water temperature drops from 6to 18F (3.3 to 10C) may be used as longas minimum and maximum watertemperatures and flow rates are notviolated. Temperature drops outside thisrange are beyond the optimum range forcontrol and may adversely affect themicropocessers ability to maintain anacceptable supply water temperaturerange.

21RLC-PRC016-EN

ApplicationConsiderations

Typical Water PipingAll building water piping must be flushedprior to making final connections to thechiller. To reduce heat loss and preventcondensation, insulation should beinstalled. Expansion tanks are alsousually required so that chilled watervolume changes can be accommodated.A typical piping arrangement is shown inFigure A-1.

Water PumpsWhere noixe limitation and vibration-freeoperation are important, Trane stronglyencourages the use of 1750-rpm (60 Hz),1450-rpm (50 Hz) pumps. specifying orusing 3600 rpm (60 Hz), 3000-rpm (50 Hz)chilled water pumps must be avoided,because such pumps my operate withobjectionable levels of noise andvibration. In addition, a low frequencybeat may occur due to the slightdifference in operating rpm between3600 rpm (60 Hz) water pumps andSeries R chiller motors. Note: The chileedwater pump must not be used to stop thechiller.

Multiple Unit OperationWhenever two or more units are used onone chilled water loop, Tranerecommends that their operation becontrolled from a single control device,such as a Trane Tracer system.

Series OperationAn energy-saving strategy is to designthe system around chillers arranged withseries evaporator flow. The actualsavings possible with such a designdepends on the application dynamics andshould be discussed with your TraneSystems Solutions Engineer. It is possibleto operate a pair of chillers moreeffiefficiently in a series chillerarrangement than in a parallelarrangement. In a series arrangement, asystem design can achieve higher chilledwater temperature differentials (16 to24F/8.9 to 13.3C), which may, in turn,provide the opportunity for lower designchilled water temperature, lower designflow, and result in installation andoperational cost savings.

Figure A-1 Recommended Piping Components For Typical Evaporator Installation

Vents ValvedPressureGauge

Drain Union

VibrationEliminator

FlowSwitch(Optional) Balancing Valve

Gate Valve

UnionWaterStrainer

VibrationEliminator

Gate Valve

For these installations, control of the unitsshould be from a common temperaturecontroller to prevent the separatethermostats fighting one another andcontinually hunting. It is possible to controlfrom the two individual unit controls, but acommon temperature controller providesa positive method for preventing controloverlap, more closely matches systemload, and simplifies compressor lead-lagcapability.

Parallel OperationSome systems require more capacity orstandby capability than a single machinecan provide. For those installations, twounits with their evaporators in a parallelconfiguration are typical. The onlyeffective way of controlling two units inparallel is with a single temperaturecontroller. Two individual temperaturecontrollers are not capable of providingreliable system control and will oftenresult in unsatisfactory operation.

RLC-PRC016-EN22

Model Nomenclature Digit Number1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

70-125 Tons

Digits 1,2 Unit ModelRT = Rotary Chiller

Digit 3 Unit TypeA = Air Cooled

Digit 4 Development SequenceA = First Sequence

Digit 5, 6 & 7 Nominal Capacity070 = 70 tons080 = 80 tons090 = 90 tons100 = 100 tons110 = 110 tons125 = 125 tons

Digit 8 Unit VoltageA = 200/60/3C = 230/60/3D = 380/60/34 = 460/60/35 = 575/60/3K = 400/50/3S = Special

Digit 9 Compressor Starter TypeY = Y-Delta Closed TransitionX = X-Line (Across the Line)S = Special

Digit 10, 11 Design Sequence** = Factory Input

Digit 12 Evaporator Leaving Temperature1 = Standard 40 to 65F2 = Low 0 to 39F3 = Ice-Making 20 to 65FS = Special

Digit 13 Condenser Coil Fin MaterialA = AluminumS = Special2 = CompleteCoat4 = Copper

Digit 14 Agency Listing0 = No Agency Listing3 = C/UL Listing4 = China Pressure Vessel Code5 = China Pressure Vessel Code

& C/UL Listing

Digit 15 Control InterfaceC = Deluxe without CommunicationD = Deluxe with CommunicationL = LonTalk (LCI-C)

Digit 16 Chilled Water Reset0 = No Chilled Water Reset1 = Based on Return Water Temperature2 = Based on Outside Air Temperature

Digit 17 Miscellaneous Factory InstalledOptions

A = Architectural Louvered PanelsB = Control Power TransformerC = Convenience OutletD = Low Ambient Lockout SensorF = Mech. Disconnect SwitchG = Low Ambient OperationK = Coil ProtectionM = Access GuardP = Circuit Breaker (Single Point Power)0 = Size C2 HP Pump Package1 = Size D3 HP Pump Package2 = Size D5 HP Pump Package3 = Size E2 HP Pump Package4 = Size E3 HP Pump Package5 = Size F5 HP Pump Package6 = Size F7 HP Pump Package7 = Size G3 HP Pump Package8 = Size G5 HP Pump Package

Field Installed OptionsN = Elastomeric IsolatorsR = Remote Display PanelJ = Remote EvaporatorH = Sound Attenuator

Model NumberDescription 70-125 Tons

23RLC-PRC016-EN

Table G-1 General Data RTAA 70-125 TonSize 70 80 90 100 110 125Compressor Quantity 2 2 2 2 2 2 Nominal Size (1) (Tons) 35/35 40/40 50/40 50/50 60/50 60/60Evaporator Water Storage (Gallons) 39.8 37.3 34.4 32.1 53.4 45.8

(Liters) 150.6 143.1 130.2 121.5 202.11 173.4 Min. Flow (GPM) 84 96 108 120 132 150

(L/Sec) 5.3 6.1 6.8 7.6 8.3 9.5 Max. Flow (GPM) 252 288 324 360 396 450

(L/Sec) 15.9 18.2 20.4 22.7 25.0 28.4Condenser Qty of Coils 4 4 4 4 4 4 Coil Length (In) 156/156 156/156 168/156 168/168 204/168 204/204 (mm) 3962/3962 3962/3962 4267/3962 4267/4267 5182/4267 5182/5182 Coil Height (In) 42 42 42 42 42 42 (mm) 1067 1067 1067 1067 1067 1067 Fins/Ft. 192 192 192 192 192 192 Number of Rows 2 2 2 2 2 2Condenser Fans (60 Hz) Quantity (1) 4/4 4/4 5/4 5/5 5/5 5/5 Diameter (In) 30 30 30 30 30 30 (mm) 762 762 762 762 762 762 Total Airflow (CFM) 71750 71750 77640 83530 87505 91480 Nominal RPM 60 Hz 1140 1140 1140 1140 1140 1140 Tip Speed (Ft/Min) 8954 8954 8954 8954 8954 8954 Motor HP (Ea) 1.25 1.25 1.25 1.25 1.25 1.25Condenser Fans (50 Hz) Quantity (1) 4/4 4/4 5/4 5/5 5/5 5/5 Diameter (In) 30 30 30 30 30 30 (mm) 762 762 762 762 762 762 Total Airflow (CFM) 59172 59200 63963 68724 72104 75492 Nominal RPM 50 Hz 970 970 970 970 970 970 Tip Speed (Ft/Min) 7618 7618 7618 7618 7618 7618 Motor HP (Ea) 1.25 1.25 1.25 1.25 1.25 1.25Min Starting/Oper Ambient (2) Std Unit (Deg F) 25 25 25 25 25 25

(Deg C) -3.9 -3.9 -3.9 -3.9 -3.9 -3.9 Low Ambient (Deg F) -10 -10 -10 -10 -10 -10

(Deg C) -23.3 -23.3 -23.3 -23.3 -23.3 -23.3General Unit Refrigerant HCFC-22 HCFC-22 HCFC-22 HCFC-22 HCFC-22 HCFC-22 No. of Independent Refrigerant Circuits 2 2 2 2 2 2 Refrigerant Charge (1) (Lb) 58/58 61/61 73/61 73/73 98/73 98/98

(Kg) 26/26 28/28 34/28 34/34 44/34 44/44 Oil Charge (1) (Gallons) 2.5/2.5 2.5/2.5 3/2.5 3/3 3/3 3/3

(Liters) 10.6/10.6 10.6/10.6 12.7/10.6 12.7/12.7 12.7/12.7 12.7/12.7

1. Data containing information on two circuits shown as follows: ckt 1/ckt2.2. Minimum start-up/operating ambient based on a 5 mph wind across the condenser.

Table G-2 General Data Pump Package

General Data

1. Information given for 460/60/3 units only.

egakcaPpmuPeziS 2C 3D 5D 2E 3E 5F 7F 3G 5G

pmuPytitnauQPHrotoM )hcae(

22

23

25

22

23

25

25.7

23

25

egarotSretaWnoitcennoc"4

noitcennoc"6

)snollaG()sretiL()snollaG()sretiL(

46.3136.15

----

45.3152.158.6182.46

81.6152.1614.9174.37

52.6115.16

----

52.6115.1695.9161.47

45.3211.9890.6267.89

45.3211.9890.6267.89

26.3214.9865.6245.001

26.3214.9865.6245.001

RLC-PRC016-EN24

The chiller capacity tables, P-1 throughP-4, cover the most frequentlyencountered leaving watertemperatures. The tables reflect a 10F(6C) temperature drop through theevaporator. For temperature drops otherthan 10F (6C), refer to Table F-1, andapply the appropriate Performance DataAdjustment Factors. For chilled brineselections, refer to Figures F-2 and 3 forEthylene and Propylene GlycolAdjustment Factors.

To select a Trane air-cooled Series Rchiller, the following information isrequired:

1. Design load in tons of refrigeration

2. Design chilled water temperature drop

3. Design leaving chilled watertemperature

4. Design ambient temperature

The following formulas can be used todetermine approximate evaporator flowrates:

GPM = Tons x 24 Temperature Drop (Degrees F)

OR

L/S = kW (Capacity) x .239 Temperature Drop (Degrees C)

NOTE: Flow rates must fall within thelimits specified in Table G-1 (for GPM orfor l/s). Formulas listed above are usefultools to estimate evaporator flow rates.

For specific chiller performance, contact alocal Trane sales engineer.

Selection Example

Given:

Required System Load = 115 TonsLeaving Chilled Water Temperature(LCWT) = 44F Chilled Water TemperatureDrop = 10F Design Ambient Temperature= 95FEvaporator Fouling Factor = 0.0001

1. To calculate the required chilled waterflow rate we use the formula givenbelow:

GPM = 115 Tons x 24 = 276 GPM 10F

2. From Table P-1 (RTAA PerformanceData), an RTAA 125 at the givenconditions will produce 120.0 tons witha compressor power input of 136.2 kWand a unit EER of 9.8.

3. To determine the evaporator pressuredrop we use the flow rate (GPM) andthe evaporator water pressure dropcurves, Figure F-1. Entering the curveat 276 GPM, the pressure drop for anominal 125 ton evaporator is 18 feet.

4. For selection of chilled brine units orapplications where the altitude issignificantly greater than sea level orthe temperature drop is different than

10F, the performance adjustmentfactors from Tables F-1, F-2, and/or F-3should be applied at this point.

For example:

Corrected Capacity = Capacity(unadjusted) x Glycol Flow Rate Adjustment Factor

5. The final unit selection is: QTY (1) RTAA 125 Cooling Capacity = 120.0 tons Entering/Leaving Chilled Water

Temperatures = 54/44F Chilled Water Flow Rate = 276 GPM Evaporator Water Pressure Drop = 18

feet Compressor Power Input = 136.2 kW Unit EER = 9.8

Minimum Leaving Chilled WaterTemperature SetpointThe minimum leaving chilled watertemperature setpoint for water is 40F.For those applications requiring lowersetpoints, a brine solution must be used.Contact the local Trane sales engineer foradditional information.

Chilled Brine SolutionsSeries R chillers can utilize a wide varietyof chilled fluids other than water in theevaporator, including ethylene glycol andpropylene glycol. Chillers using mediaother than water are excluded from theARI 550/590 Certification Program, butare rated in accordance with the ARIStandard. Trane factory performancetests are only performed with water asthe chilled fluid. When consideringselection of media other than water,contact the local Trane sales office forchiller selections and factoryperformance testing information.

SelectionProcedure

25RLC-PRC016-EN

PerformanceAdjustmentFactors

Figure F-1 Evaporator Water Pressure Drops, 70-125 Ton Units

Table F-1 Performance Data Adjustment FactorsChilled Altitude

Fouling Water Sea Level 2000 Feet 4000 Feet 6000 FeetFactor Temp. Drop CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW

8 1.000 1.249 1.000 0.996 1.245 1.004 0.991 1.240 1.007 0.987 1.234 1.0140.00010 10 1.000 1.000 1.000 0.997 0.996 1.004 0.993 0.992 1.007 0.988 0.988 1.015

12 1.001 0.835 1.001 0.997 0.832 1.004 0.993 0.828 1.009 0.988 0.824 1.01514 1.003 0.716 1.001 0.999 0.714 1.004 0.994 0.711 1.009 0.990 0.708 1.01516 1.004 0.628 1.001 1.000 0.626 1.005 0.997 0.623 1.009 0.991 0.620 1.0168 0.988 1.235 0.996 0.984 1.230 1.000 0.980 1.225 1.004 0.975 1.220 1.010

0.00025 10 0.988 0.989 0.998 0.986 0.985 1.000 0.981 0.981 1.004 0.977 0.976 1.01112 0.990 0.825 0.998 0.987 0.822 1.000 0.983 0.819 1.005 0.978 0.815 1.01114 0.991 0.708 0.998 0.988 0.706 1.001 0.984 0.703 1.005 0.980 0.700 1.01116 0.993 0.621 0.999 0.990 0.619 1.001 0.986 0.617 1.006 0.981 0.614 1.012

FLOW (L/s)

RLC-PRC016-EN26

PerformanceAdjustmentFactors

Figure F-2 Ethylene Glycol Performance Factors Figure F-3 Propylene Glycol Performance Factors

Figure F-4 Ethylene Glycol and Propylene Glycol Freeze Point

27RLC-PRC016-EN

Notes:1. Ratings based on sea level altitude and evaporator fouling factor of 0.00010 hr-sq. ft.-F/Btu.2. Consult Trane representative for performance at temperatures outside of the ranges shown.3. kW input is for compressors only.4. EER = Energy Efficiency Ratio (Btu/watt-hour). Power inputs include compressors, condenser fans and control power.5. Ratings are based on an evaporator temperature drop of 10F.6. Ambient temperatures 115F and greater reflect the high ambient condenser option.7. Interpolation between points is permissible. Extrapolation is not permitted.8. Rated in accordance with ARI Standard 550/590.

Table P-1. 60 Hz chillers in English units

PerformanceData Full Load

Evaporator Leaving Water

Temperature (F) Unit Size TonskW

input EER TonskW

input EER TonskW

input EER TonskW

input EER70 68.7 64.3 11.2 64.6 70.8 9.7 60.4 77.9 8.4 55.5 84.8 7.180 78.8 75.6 11.2 74.4 83.1 9.7 69.8 91.3 8.4 65.0 100.4 7.2

40 90 89.9 88.9 10.9 84.8 97.0 9.5 79.5 106.1 8.2 73.9 116.4 7.0100 99.9 101.7 10.6 94.2 110.5 9.3 88.2 120.5 8.1 81.9 131.9 6.9110 107.7 110.7 10.6 101.6 120.3 9.3 95.2 131.2 8.1 88.4 143.6 6.9125 119.3 122.0 10.8 112.4 132.3 9.4 105.2 144.1 8.2 97.5 157.5 7.070 71.1 65.1 11.5 66.9 71.6 10.0 62.6 78.7 8.6 57.1 84.8 7.380 81.6 76.8 11.4 77.1 84.2 9.9 72.3 92.5 8.6 67.4 101.6 7.3

42 90 93.0 90.3 11.1 87.8 98.4 9.7 82.3 107.5 8.4 76.5 117.8 7.2100 103.2 103.3 10.8 97.4 112.0 9.5 91.2 122.1 8.2 84.7 133.5 7.1110 111.3 112.4 10.8 105.0 121.9 9.5 98.4 132.9 8.2 91.5 145.3 7.0125 123.2 124.0 11.0 116.2 134.2 9.6 108.7 146.1 8.3 100.9 159.5 7.170 73.5 65.9 11.8 69.3 72.4 10.2 64.9 79.6 8.8 58.6 84.8 7.580 84.5 78.0 11.7 79.8 85.4 10.2 74.9 93.7 8.8 69.9 102.8 7.5

44 90 96.1 91.7 11.3 90.8 99.8 9.9 85.1 108.9 8.6 79.2 119.2 7.4100 106.6 104.9 11.0 100.6 113.6 9.7 94.3 123.7 8.4 87.6 135.1 7.2110 114.9 114.2 11.0 108.5 123.7 9.7 101.7 134.6 8.4 94.6 147.1 7.2125 127.3 126.0 11.1 120.0 136.2 9.8 112.4 148.1 8.5 104.3 161.5 7.370 76.0 66.8 12.0 71.7 73.2 10.5 67.2 80.5 9.0 60.2 84.8 7.780 87.4 79.2 11.9 82.6 86.6 10.4 77.6 94.9 9.0 72.4 104.1 7.7

46 90 99.4 93.1 11.6 93.8 101.2 10.1 88.0 110.4 8.8 81.7 120.4 7.5100 110.1 106.6 11.2 103.9 115.3 9.9 97.4 125.3 8.6 90.6 136.7 7.4110 118.6 116.0 11.2 112.0 125.5 9.9 105.1 136.4 8.6 97.7 148.9 7.4125 131.4 128.0 11.3 123.9 138.3 10.0 116.0 150.1 8.7 106.7 162.1 7.470 78.5 67.6 12.3 74.1 74.1 10.7 69.5 81.4 9.3 61.8 84.8 7.980 90.4 80.4 12.1 85.4 87.9 10.6 80.3 96.2 9.2 74.4 104.7 7.9

48 90 102.6 94.6 11.8 96.9 102.7 10.3 90.9 111.8 9.0 82.9 120.1 7.7100 113.6 108.3 11.4 107.3 117.0 10.1 100.6 127.0 8.8 92.0 136.7 7.5110 122.4 117.8 11.4 115.6 127.3 10.0 108.4 138.3 8.7 99.4 148.9 7.5125 135.6 130.2 11.5 127.9 140.4 10.1 119.8 152.2 8.8 107.2 160.2 7.570 81.1 68.5 12.6 76.5 75.0 11.0 71.8 82.3 9.5 63.4 84.8 8.180 93.4 81.7 12.4 88.3 89.1 10.8 83.0 97.4 9.4 75.9 104.8 8.0

50 90 106.0 96.2 12.0 100.1 104.2 10.5 93.9 113.3 9.2 84.3 120.0 7.8100 117.2 110.1 11.6 110.7 118.7 10.3 103.8 128.7 8.9 93.4 136.5 7.6110 126.2 119.7 11.6 119.2 129.2 10.2 111.9 140.1 8.9 101.0 148.7 7.6125 139.9 132.3 11.7 131.9 142.6 10.3 123.6 154.3 9.0 108.0 158.5 7.7

Condenser Entering Air Temperature (F)85 95 105 115

RLC-PRC016-EN28

PerformanceData Full Load

Table P-2. 50 Hz chillers in English units

Notes:1. Ratings based on sea level altitude and evaporator fouling factor of 0.00010hr-sq. ft.-F/Btu .2. Consult Trane representative for performance at temperatures outside of the ranges shown.3. kW input is for compressors only.4. EER = Energy Efficiency Ratio (Btu/watt-hour). Power inputs include compressors, condenser fans and control power.5. Ratings are based on an evaporator temperature drop of 10F.6. Ambient temperatures 115F and greater reflect the high ambient condenser option.7. Interpolation between points is permissible. Extrapolation is not permitted.8. Rated in accordance with ARI Standard 550/590.

Evaporator Leaving Water

Temperature (F) Unit Size TonskW

input EER TonskW

input EER TonskW

input EER TonskW

input EER70 59.5 53.4 12.2 56.0 58.7 10.5 52.3 64.7 9.0 48.6 71.2 7.680 68.4 62.9 12.0 64.5 69.0 10.4 60.5 75.9 9.0 56.4 83.4 7.7

40 90 77.9 73.9 11.7 73.5 80.6 10.2 68.9 88.1 8.8 64.0 96.6 7.5100 86.6 84.5 11.4 81.7 91.7 10.0 76.4 100.0 8.6 70.9 109.4 7.4110 93.5 92.0 11.4 88.2 99.9 10.0 82.6 108.9 8.6 76.7 119.1 7.3125 103.2 101.1 11.5 97.2 109.6 10.1 91.0 119.4 8.7 84.3 130.5 7.470 61.6 54.1 12.4 58.0 59.4 10.8 54.3 65.4 9.2 50.4 71.9 7.980 70.9 63.8 12.3 66.9 70.0 10.7 62.8 76.8 9.2 58.5 84.4 7.8

42 90 80.7 75.1 12.0 76.1 81.7 10.4 71.3 89.3 9.0 66.3 97.7 7.7100 89.5 85.9 11.6 84.4 93.0 10.2 79.1 101.3 8.8 73.4 110.7 7.5110 96.6 93.4 11.6 91.2 101.3 10.2 85.4 110.3 8.8 79.4 120.6 7.5125 106.7 102.8 11.7 100.6 111.3 10.3 94.1 121.0 8.9 87.3 132.1 7.670 63.7 54.8 12.7 60.0 60.1 11.0 56.2 66.1 9.5 52.3 72.7 8.180 73.4 64.9 12.6 69.3 71.0 10.9 65.1 77.9 9.4 60.6 85.4 8.0

44 90 83.4 76.3 12.2 78.8 82.9 10.7 73.8 90.5 9.2 68.7 98.9 7.9100 92.5 87.3 11.8 87.3 94.4 10.4 81.8 102.7 9.0 76.0 112.1 7.7110 99.8 94.9 11.8 94.3 102.8 10.4 88.3 111.8 9.0 82.1 122.1 7.7125 110.2 104.5 11.9 103.9 112.9 10.5 97.3 122.7 9.0 90.3 133.8 7.770 65.9 55.5 13.0 62.1 60.8 11.3 58.2 66.8 9.7 54.2 73.5 8.380 76.0 65.9 12.8 71.8 72.0 11.2 67.4 78.9 9.6 62.8 86.5 8.2

46 90 86.3 77.5 12.4 81.4 84.1 10.9 76.4 91.7 9.4 71.1 100.2 8.1100 95.6 88.7 12.0 90.2 95.8 10.6 84.5 104.1 9.2 78.5 113.5 7.9110 103.1 96.5 12.0 97.4 104.3 10.6 91.3 113.3 9.2 84.8 123.6 7.8125 113.9 106.2 12.1 107.4 114.7 10.6 100.5 124.4 9.2 93.3 135.5 7.970 68.1 56.2 13.3 64.2 61.5 11.5 60.2 67.6 9.9 56.1 74.3 8.580 78.7 66.9 13.1 74.3 73.1 11.4 69.8 80.0 9.8 65.1 87.5 8.4

48 90 89.2 78.8 12.6 84.2 85.4 11.1 78.9 92.9 9.6 73.5 101.4 8.2100 98.7 90.2 12.3 93.1 97.2 10.8 87.3 105.5 9.4 81.1 114.9 8.0110 106.5 98.1 12.2 100.5 105.8 10.7 94.2 114.9 9.3 87.6 125.1 8.0125 117.6 108.0 12.3 110.8 116.4 10.8 103.8 126.2 9.4 95.7 136.4 8.170 70.3 56.9 13.6 66.4 62.3 11.8 62.3 68.4 10.2 58.1 75.2 8.780 81.3 68.0 13.3 76.8 74.2 11.6 72.2 81.0 10.1 67.3 88.6 8.6

50 90 92.1 80.1 12.9 87.0 86.7 11.3 81.6 94.2 9.8 75.9 102.7 8.4100 101.9 91.7 12.5 96.1 98.7 11.0 90.1 106.9 9.6 83.8 116.3 8.2110 109.9 99.7 12.4 103.7 107.4 10.9 97.3 116.4 9.5 90.5 126.7 8.2125 121.3 109.9 12.5 114.4 118.2 11.0 107.1 128.0 9.6 96.5 135.1 8.2

Condenser Entering Air Temperature (F)85 95 105 115

29RLC-PRC016-EN

PerformanceData Full Load

Notes:1. Ratings based on sea level altitude and evaporator fouling factor of 0.0176 sq. m-C/kW.2. Consult Trane representative for performance at temperatures outside of the ranges shown.3. kW input is for compressors only.4. EER = Energy Efficiency Ratio (Btu/watt-hour). Power inputs include compressors, condenser fans and control power.5. Ratings are based on an evaporator temperature drop of 5.6C.6. Interpolation between points is permissible. Extrapolation is not permitted.7. Rated in accordance with ARI Standard 550/590.

Table P-3. 60 Hz chillers in metric units

Evaporator Leaving Water Temperature

(C) Unit SizekW

CoolingkW

input COPkW

CoolingkW

input COPkW

CoolingkW

input COPkW

CoolingkW

input COP70 244.4 65.3 3.3 231.4 71.2 2.9 218.0 77.6 2.5 203.9 84.6 2.280 280.2 76.9 3.3 266.2 83.6 2.9 251.4 91.0 2.5 236.3 99.1 2.2

5 90 319.6 90.4 3.2 303.4 97.7 2.8 286.2 105.9 2.5 268.6 114.9 2.2100 355.1 103.3 3.1 336.8 111.2 2.8 317.5 120.2 2.4 297.5 130.3 2.1110 382.9 112.5 3.1 363.2 121.1 2.8 342.8 130.9 2.4 321.0 141.8 2.1125 424.0 123.9 3.1 401.9 133.3 2.8 378.7 143.9 2.5 354.4 155.7 2.170 259.5 66.8 3.4 246.1 72.7 3.0 232.1 79.1 2.6 214.1 84.7 2.380 298.5 79.0 3.4 283.4 85.8 3.0 267.9 93.2 2.6 252.1 101.3 2.3

7 90 339.7 92.9 3.3 322.4 100.2 2.9 304.5 108.4 2.6 285.5 117.5 2.3100 376.6 106.2 3.2 357.2 114.1 2.9 337.2 123.1 2.5 316.1 133.2 2.2110 405.8 115.6 3.2 385.4 124.2 2.9 363.6 134.0 2.5 341.1 145.0 2.2125 449.3 127.6 3.2 426.1 136.9 2.9 401.9 147.4 2.5 376.2 159.3 2.270 275.3 68.3 3.6 261.2 74.2 3.2 246.8 80.7 2.8 224.7 84.8 2.480 317.1 81.2 3.5 301.3 88.0 3.1 285.2 95.4 2.7 268.3 103.6 2.4

9 90 360.0 95.5 3.4 341.8 102.8 3.0 323.1 111.0 2.7 303.1 120.1 2.3100 398.7 109.3 3.3 378.3 117.1 3.0 357.2 126.1 2.6 335.1 136.2 2.3110 429.3 118.9 3.3 407.9 127.5 3.0 385.0 137.3 2.6 361.4 148.3 2.3125 475.7 131.3 3.3 451.1 140.6 3.0 425.4 151.2 2.6 398.7 163.1 2.3

Condenser Entering Air Temperature (C)30 35 40 45

RLC-PRC016-EN30

Table P-4. 50 Hz chillers in metric units

Notes:1. Ratings based on sea level altitude and evaporator fouling factor of 0.0176 sq. m-C/kW.2. Consult Trane representative for performance at temperatures outside of the ranges shown.3. kW input is for compressors only.4. EER = Energy Efficiency Ratio (Btu/watt-hour). Power inputs include compressors, condenser fans and control power.5. Ratings are based on an evaporator temperature drop of 5.6C.6. Interpolation between points is permissible. Extrapolation is not permitted.7. Rated in accordance with ARI Standard 550/590.

PerformanceData Full Load

Evaporator Leaving Water Temperature

(C) Unit SizekW

CoolingkW

input COPkW

CoolingkW

input COPkW

CoolingkW

input COPkW

CoolingkW

input COP70 211.7 54.3 3.6 200.4 59.1 3.1 188.8 64.4 2.7 176.5 70.2 2.480 243.7 63.9 3.5 231.0 69.5 3.1 218.3 75.6 2.7 205.0 82.3 2.3

5 90 277.4 75.1 3.4 263.0 81.1 3.0 248.2 87.9 2.7 232.8 95.4 2.3100 307.7 85.9 3.3 292.2 92.4 3.0 275.3 99.8 2.6 257.7 108.1 2.3110 332.3 93.5 3.3 315.4 100.6 3.0 297.5 108.6 2.6 278.5 117.7 2.3125 366.7 102.7 3.4 347.7 110.4 3.0 327.7 119.2 2.6 306.6 129.0 2.370 225.0 55.5 3.7 213.4 60.3 3.3 201.1 65.7 2.8 188.8 71.6 2.580 259.5 65.8 3.7 246.5 71.3 3.2 232.8 77.5 2.8 218.7 84.2 2.5

7 90 294.6 77.3 3.5 279.9 83.3 3.1 264.1 90.0 2.8 247.5 97.5 2.4100 326.6 88.4 3.4 310.1 94.8 3.1 292.5 102.2 2.7 273.9 110.5 2.4110 352.7 96.1 3.4 334.7 103.2 3.1 315.7 111.3 2.7 296.1 120.4 2.3125 389.2 105.8 3.5 369.2 113.5 3.1 347.7 122.2 2.7 325.6 132.0 2.470 238.7 56.8 3.9 226.8 61.6 3.4 214.1 67.0 3.0 201.1 73.0 2.680 276.0 67.6 3.8 262.3 73.2 3.3 247.9 79.3 2.9 232.8 86.1 2.6

9 90 312.9 79.5 3.7 297.1 85.5 3.3 280.2 92.3 2.9 263.0 99.8 2.5100 346.3 91.0 3.6 328.4 97.4 3.2 310.1 104.8 2.8 290.8 113.1 2.4110 373.4 98.9 3.5 354.4 106.0 3.2 334.7 114.1 2.8 314.0 123.1 2.4125 412.4 109.0 3.6 391.0 116.6 3.2 368.5 125.3 2.8 345.3 135.1 2.4

Condenser Entering Air Temperature (C)30 35 40 45

31RLC-PRC016-EN

PerformanceData

Table P-6 ARI Part-Load Values (50 Hz)Unit % Load kW cooling COP IPLVRTAA 70 100 211.1 3.2 4.4

75 158.3 3.950 105.6 4.725 52.8 5.1

RTAA 80 100 243.8 3.2 4.275 182.8 3.750 121.9 4.825 60.9 4.0

RTAA 90 100 276.9 3.1 4.275 207.7 3.650 138.5 4.725 69.2 4.3

RTAA 100 100 306.9 3.0 4.075 230.2 3.550 153.5 4.325 76.7 4.8

RTAA 110 100 331.4 3.0 4.075 248.5 3.550 165.7 4.225 82.8 4.8

RTAA125 100 365