Trane Classic®

Absorption Series

Single-Stage Hot Water or

Steam-Fired Absorption Water Chillers

112-465 Tons

Built for Industrial and Commercial Applications

ABS-PRC005-ENMarch 2001

ABS-PRC005-EN©American Standard Inc. 2001

Introduction

History of Trane Absorption Chillers

Trane has been the leader in absorption chiller design and manufacturing for 40years. Dedicated to the advancement of absorption chiller technology, Trane is theonly North American chiller manufacturer to commercialize double effect absorptionover 25 years ago. Since then, Trane has manufactured and shipped over 10,000absorbers to commercial, industrial and process applications worldwide. Innovationssuch as microelectronic controls, adaptive frequency drives and smart purge systemshave modernized the technology, making it more capable, more reliable and in manyapplications, more economical.

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Contents

Introduction

Features and BenefitsComponent Identification, Typical Single-StageSteam Illustration, Refrigerant Cycle Overview

Application ConsiderationsOperating Limits, Sound, Water Flow/Treatment,Combination Systems, Multiple Machines

Selection ProcedureComputer Selection Procedure, Tube Fouling

Performance DataCapacity/COP/Steam Rate/Flow Rate, Pressure DropTables, Capacity vs. Chilled Water Supply Temperature,Energy Input vs. Capacity, Pressure Drop vs. Flow Rate

Electrical Data

Controls Data

Dimensions and WeightsPhysical Dimensions, Weights, Connection Sizes,Refrigerant Charging, Separated Machine Sections,Foundation Support, Rigging/Service Clearances,Chiller Isolation, Insulation Lengths

Jobsite ConnectionsTypical Piping

Mechanical Specifications

Standard Conversion Table

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Features andBenefits General

Why Trane AbsorptionMakes SenseEngineers and owners who are planningnew chiller plants, expanding systems orprocesses, or replacing olderrefrigeration equipment, are more oftenconsidering the absorption option. Theuse of absorption chillers is on the risedue to their increased reliability and thebenefits of hybrid chiller plant design.The absorption chiller has earned thereputation as a viable alternative to theelectric chiller or in the example of ahybrid installation, a viable counterpartto the electric chiller.

Operates With Either Water orSteam SourceAbsorption is particularly appropriate incooling applications where there is a low-pressure steam or hot liquid source, awaste heat recovery option, or in areaswhere electric rates or demand chargesare high. The Trane Classic single-stageabsorption chiller is designed to usesteam at pressures up to 14 psig and attemperatures to 340°F, or hot watertemperatures up to 270°F. These chillersare ideal for situations requiring chilledwater in the range of 40-50°F. They are apopular choice when an economiccomparison of electrical rates versus fuelcosts indicates an operating costadvantage for absorption.

The Classic single-stage absorptionchiller features a time-tested designalong with continuing advancements incomponent metallurgy and systemscontrols and control logic. This single-stage design is ideally suited forapplications with low pressure steam orpressurized hot water. They are availablein sizes from 112 to 465 tons and can beused in a wide range of process andcomfort cooling applications, using eitherhot water or steam as an energy input.The chiller is a hermetic design andcomes with a factory-mountedmicroprocessor-based control system.Units are available in voltages of 200,380, 415, 460 or 575 VAC for either 60 or50 Hz operation.

A full range economizer is standard forthese units to precisely match thesolution flow in proportion to the cooling

load on the machine. This reduces theamount of heat input required and canresult in significant operating economies.

Ships Completely AssembledAll Trane single-stage absorption unitsare fully assembled in the factory andship in one piece. When they arrive at thejobsite, they are ready to be set in place.In addition to simplified installation, fullfactory assembly makes it possible forthe customer to benefit from a stringentfactory mass spectrometer leak test.

The units are shipped under a vacuum toassure that hermetic integrity ismaintained through installation. Bycomparing machine vacuum at thejobsite with the factory record, thecontractor and owner can be confidentthat there has been no damage tothe machine and it is airtight, dryand clean.

Low Temperature Input DesignsMaking chilled water from comparativelylow temperature inputs is particularlyimportant for energy conservingapplications such as waste heat recoveryand co-generation equipment and solarenergy powered cooling. The samereliability and performance proven inthousands of conventional applications

can be expected in low temperatureapplications.

Concentration Limit ControlA positive concentration limit (PCL)control is standard on all unit sizes. Thissystem is designed to detect conditionswhere crystallization might occur andautomatically pump dilute refrigerantinto the system, and if crystallizationcontinues, shut down the machine. Thisis valuable if the machine operatesunattended and electrical powerinterruptions are common. It protects themachine from possible damage in theevent the machine does not have theopportunity to go through the normaldilution cycle at shutdown.

UCP2™ Control PanelThe Classic absorption chiller is equippedwith Trane’s exclusive UCP2 controlpanel which includes microprocessorcontrol capability and extensive unitdiagnostics. It allows the chiller tocontinue to operate through a broadrange of non-standard conditions,keeping chilled water supplied as long aspossible. The unit diagnostics availableas part of this control simplifytroubleshooting and allow more efficientscheduled preventive maintenance.

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Features andBenefits General

The Absorption Refrigeration CycleThe absorption cycle uses water as therefrigerant and heat as the energy inputto create chilled water for comfort orprocess applications. In the absorptioncycle, steam or hot water is used to boil adilute solution of lithium bromide andwater in a hermetic vessel. The watervapor produced is drawn through thecondenser, where it gives up heat to thecooling tower water and through theabsorption process, cools the systemcirculating water. This process isillustrated in the flow diagram on thereverse side.

Built/Designed In An ISO 9001Quality Certified FacilityTrane absorption machines are builtin an ISO 9001 quality certified facility inLa Crosse, WI.

All Trane chillers include extensiveaftermarket support. Training for unitoperators is provided to assure thatdesignated unit operators thoroughlyunderstand absorption system operationand unit capabilities and limitations.

Factory-trained absorption servicepersonnel are located throughout thecountry to support Trane chillers andperform periodic routine maintenanceprograms, as well as troubleshootequipment if necessary. Records on theexact construction of each chiller aremaintained by Trane. This assures that allappropriate parts are provided if serviceis necessary, and that the unit can bemaintained exactly as it was intended.

Trane Absorption LeadershipTrane has been the market leader inabsorption water chillers for over40 years. The company is committed toresearch, development and applicationof absorption technology at its researchfacilities in La Crosse, Wisconsin.Since 1959, Trane has shipped over10,000 absorption units for use aroundthe world. Trane’s commitment toabsorption technology includeslaboratory testing and factory training oftechnicians for start-up and warrantyservice and emergency service support.

Standard Specification

• Single shell design• Long-life cupronickel tubes in the

concentrator, evaporator and absorber• Factory leak tested to help assure

product integrity• Tubes are individually replaceable from

either end of machine• Solution pump motor can be serviced

without breaking vacuum or removingsolution from machine

• Victaulic™ water connections• Automatic decrystallization controls• Start-up steam demand limit control

Optional Specification

• Special corrosion-resistant tubing• Stainless steel evaporator pans• Lithium bromide filter and valves• Welded raised face flanges at all water

connections• NEMA 4 controls• Chemically resistant epoxy paint• Wooden pallets can be provided under

each leg for handling at installation siteor to facilitate international shipment

UCP2 Controls

• Improved reliability and performance• Factory installed and commissioned• Proportional integral derivative (PID)

control. Adaptive Control™ strategiesfor stable, efficient, reliable and optimalchilled water temperature control

• Easy-to-use operator interface thatincludes— English or SI units— Standard and custom reports— Two-line, 40 character backlit LCD

display in clear language— Over 200 diagnostics including time

and date stamping.

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Figure FB-1 – Single-Stage Absorption Refrigeration Cycle

RefrigerationCycle

Features andBenefits

Classic Single-StageAbsorption Refrigerant Cycle

Refrigeration CycleThe Trane Absorption Cold Generator®

uses the proven lithium bromide andwater absorption refrigeration cycle. Ittakes place in a sealed, hermetic vesselfrom which essentially all air has beenevacuated. Consequently, the pressureswithin the shell are the vapor pressuresof the liquids at their respectivetemperatures. In operation, the pressurein the concentrator and condensersections is about 1/10 of an atmosphere.Pressure in the evaporator and absorbersections is about 1/100 of anatmosphere.

GeneratorHeat energy from steam or hot water isused to boil a dilute solution of lithiumbromide and water. This boiling resultsin release of water vapor, and inconcentration of the remaining lithiumbromide solution.

CondenserThe water, or refrigerant, vapor releasedin the concentrator is drawn into thecondenser section. Cooling tower waterflowing through the condenser tubescools and condenses the refrigerant.

EvaporatorLiquid refrigerant flows through anorifice into the evaporator. As therefrigerant passes into the lowerpressure evaporator, flashing takesplace. The flashing cools the remainingliquid refrigerant to the saturationtemperature of the refrigerant at thepressure present within the evaporator,approximately 40°F.

The chilled refrigerant falls into theevaporator pan and is circulatedcontinuously to the evaporator spraytrees by the evaporator pump. Thesprayed refrigerant wets the evaporatortube bundle, chilling the system waterwithin the bundle. The transfer of heatfrom the system water to the refrigerantcauses the refrigerant to vaporize. Therefrigerant vapor generated in thisevaporative cooling process migratesdownwatd to the absorber.

AbsorberThe refrigerant vapor is drawn to theabsorber section by the low pressureresulting from absorption of therefrigerant into the absorbent. In order toexpose a large amount of lithiumbromide solution surface to the watervapor, the solution is sprayed over theabsorber tube bundle. Cooling towerwater is used in this tube bundle toremove the heat of absorption that isreleased when the refrigerant vaporreturns to the liquid state.

As the absorbent absorbs refrigerantvapor, the solution becomes increasinglydilute. It is necessary to continuouslycirculate this dilute solution back to theconcentrator to keep the cyclecontinuous.

Solution Heat ExchangerThe heat exchanger exchanges heatbetween the relatively cool, dilutesolution being transferred from theabsorber to the concentrator section andthe hot, concentrated, solution beingreturned from the concentrator to theabsorber. Transferring heat from theconcentrated solution to the dilutesolution reduces the amount of heat thatmust be added to bring the dilutesolution to a boil. Simultaneously,reducing the temperature of theconcentrated solution decreases theamount of heat that must be removedfrom the absorber section. Efficientoperation of the heat exchanger isextremely important to the economicaloperation of the lithium bromide-watercycle.

Steam or Hot Water

Concentrator CondenserCooling Water

Evaporator

Absorber

SystemWater

Cooling Water

Hea

t Exc

hang

er

Concentrated Solution

Dilute Solution

Intermediate Solution

Refrigerant

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ApplicationConsiderations General

GeneralThe Classic single-stage steam-fired orhot water absorption chiller is designedto provide 40°F to 60°F (4.4°C - 15.6°C)chilled water for comfort or processcooling applications within all threemarket segments – commercial,industrial and institutional. They aremost often used where an economicanalysis of fuel costs versus electricalrates indicates an operating costadvantage.

In many process applications, they canbe utilized to convert excess heat energyto provide chilled water for process orcomfort applications.

Operating LimitsClassic single-stage absorption chillersoperate with nominal 13 psig (0.83 bar)steam or nominal 270°F (132°C) hotwater. In all applications, superheatshould be limited so steam temperaturedoes not exceed 340°F (171°C).

Water flows within the limits indicatedon the appropriate selection table willensure tube water velocities notexceeding 10 feet per second(3.05 m/sec) in copper tubes and 11 feetper second (3.35 m/sec) in cupronickeltubes. Changes in condenser watertemperature should not exceed1-degree F per minute between therange of 75-95°F (23.9°C - 35°C).

Sound and VibrationAbsorption units are well-suited forareas where low sound levels arerequired. The Trane Classic single-stagesteam absorption chiller will operateunder normal load conditions at lessthan 85 dBA sound pressure level.During operation there is no vibration ofany components that could bedamaging to the chiller or could transmitobjectionable sound or vibration to thebuilding.

Chiller InstallationThe following should be taken intoconsideration when installing anabsorption chiller:• Rigging and service clearances• Foundation support• Chiller isolation for sound/vibration

reduction• Condensate handling• Steam supply control• Condenser water temperature control• Chilled water flow control• Chilled and condenser water flow limit• Generator hot water application

Water TreatmentThe use of untreated or improperlytreated water may result in scaling,erosion, and corrosion, algae or slime. Itis recommended that the services of aqualified water treatment specialist beused to determine what treatment, if anyis advisable. The Trane Companyassumes no responsibility for the resultsof untreated, or improperly treatedwater.

Combination SystemsPeak energy savings can be achievedwhen using a combination of electricchillers and absorption chillers for airconditioning loads. The absorptionchiller is used to shave seasonal billablepeak power demands during summeroperation, and the electric chiller is runbelow the allowed demand limit,reducing costly demand charges. Traneoffers both electric chillers andabsorption chillers with the unit controlpanel (UCP2) as standard. Although thechillers have different features andmodes of operation, the chiller controlpanel looks and acts the same across allchiller lines. Each control panel isprogrammed to monitor the particularchiller for which it was designed butmaintenance and service personnelneed only become familiar with onecontrol panel. Combined with a TraneTracer® system a chiller plant has almostunlimited operational flexibility and allequipment is supplied from a singlesource.

Multiple Machine InstallationsThe Trane absorption machine can beapplied to series or parallel chilled waterflow depending upon the designrequirement. Which arrangement is bestfor an individual system should be basedon an analysis of system water andtemperature rise requirements, systemand machine pressure dropcharacteristics, and installation cost.

Parallel flow allows minimum chilledwater pressure drop through themachines. However, with one machine“off,” it is not usually possible tomaintain the design chilled watertemperature unless one machine isvalved-off and the chilled water flowdecreased.

Series flow permits design chilled watertemperature at light loads with onemachine “off.” However, at all operatingconditions, the chilled water pressuredrop through the machine is high.

Accurate chilled water temperatures canbe maintained on individual machinesbetween 100 percent and 10 percent ofnominal chiller load which allows for awide range of control options. Eachchiller has a stand-alone control systemto manage the desired watertemperature and also the ability toreceive remote commands to supportvarious system demands from a controlcenter. This versatility of control makesthe management of more than onemachine relatively easy.

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SelectionProcedure

Selection ProcedureAbsorption refrigeration machines areusually selected to provide requiredrefrigeration capacity with the smallestpractical machine of sufficient size.Machine size is based on chilled waterflow rates and temperatures specified forthe air side of the system.

Total air conditioning system first costcan be minimized by a careful analysis ofsystem operating parameters. The effectof flow rates and temperatures, on boththe building air side and the refrigerationmachine selections, should beinvestigated to establish the system thatrepresents the best investment for theowner.

The information on the following pagesprovides performance data at ARIstandard conditions for: capacity in tons,efficiency, flow rates, and water pressuredrops. All capacities are in accordancewith ARI 560 Standard and based onfouling factors of .00025 for theevaporator waterside tubing and .00025for the absorber and condenser tubing.

Standard FoulingUnit performance at non-standardfouling factors may vary from standardperformance. Fouling factors estimatethe heat transfer penalty that anticipatesthe effect of typical fouling in evaporatorand absorber/condenser (cooling) watercircuits. All selections should use thestandard fouling factor to better estimatethe chiller performance in an equipmentroom and to comply with ARI 560.

ARI Standard Fouling FactorsEvaporator/Condenser/Absorber

English Units – hr-ft2-F/Btu

0.00025SI Units – m2-K/kW

0.044

Final SelectionA final selection must be done by thelocal Trane sales engineer using theClassic (ABSC) Single-Stage AbsorptionSelection Program. For application over1600 feet (500 meters) above sea level,final selection requires review byAbsorption Product Marketing. Prior toaccessing the computer selectionprogram, the following data inputsshould be tabulated:• Temperature or pressure of the hot

water or steam• Two of the following three values must

be given1:– Evaporator Delta T– Evaporator Flow– Cooling Capacity

• Leaving Evaporator Water Temperature• Entering Absorber Water Temperature• Cooling Water Flow• Fouling factors, evaporator and tower

water

Other options that may also be selectedare:• Type and thickness of tube material• Type of solution flowing through the

evaporator and tower loop2.1 Any limitations or restrictions shouldalso be given (i.e., pressure drop, gpm,etc.).

2 Absorption chillers can be selected witha wide variety of media other thanwater (evaporator and absorber/condenser, or both). For media otherthan water, contact the local Trane salesoffice for chiller selections andinformation.

Additional FoulingAny selection that uses a fouling factorabove 0.00025 is a more conservativeestimate that should only be used ifthere is an abnormal amount of foulingcontaminants in the water systems. ARI560 Standard defines “additionalfouling” as “Conditions such as waterhardness, organic material, suspendedsolids and/or water velocity maynecessitate the use of a greater fieldfouling allowance than that provided inthe Standard Rating of equipment.” TheTrane single-stage Classic (ABSC)Selection program should be used todetermine the effect of nonstandardfouling factors. The following guidelinescan be used for estimation prior to theselection:

Additional Fouling GuidelinesEvaporator/Condenser/Absorber

English Units – hr-ft2-F/Btu

0.00026 – 0.00075SI Units – m2-K/kW

0.046

Part Load PerformanceThe Classic (ABSC) single-stageabsorption chiller exhibits excellent partload performance characteristics. Airconditioning system loads are usuallysignificantly less than full load designconditions. Therefore, the absorptionchiller operates at full load a smallpercentage of the time. Part loadabsorption chiller operation is normallyassociated with reduced tower watertemperatures. At part load operation, theheat rejected to the cooling tower is lessthan at full load operation. Also, partload operation is typically associatedwith reduced outside wet bulbtemperatures, resulting in improvedcooling tower performance. The netresult of less heat rejection and lowerwet bulb temperature is cooler towerwater entering the chiller and improvedunit performance.

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PerformanceData

Table PD-1 — Performance Data at ARI ConditionsEnglish Units*

Coefficient Steam Chilled Water Cond/Abs WaterCapacity of Rate Flow Rate Press. Drop Flow Rate Press. Drop

Model (Tons) Performance (lbm/ton/hr) (gpm)*** (ft Wtr) (gpm)*** (ft Wtr)112 107.9 0.63 20.15 258 28.7 403 25.5129 126.3 0.63 20.16 302 26.3 464 34.3148 146.4 0.63 20.18 350 38 533 28.1174 162.7 0.64 19.77 389 27.1 626 32.3200 188.6 0.64 19.73 451 33 720 26228 219 0.64 19.77 524 28.2 821 36256 246.8 0.64 19.77 590 37.7 922 24.9294 287.3 0.64 19.8 687 31.5 1058 35.1354 338.2 0.61 20.74 809 21.1 1274 29.7385 368 0.64 19.6 880 28.1 1386 29.5420 398.7 0.64 19.6 954 18.6 1512 23.4465 444.1 0.64 19.8 1063 19 1674 24.1

SI Units**Coefficient Steam Chilled Water Cond/Abs Water

Capacity of Rate Flow Rate Press. Drop Flow Rate Press. DropModel (kW) Performance (kg/kW-hr) (m3/hr) (m wg) (m3/hr) (m wg)112 380 0.63 2.60 58.6 8.75 91.5 7.78129 444 0.63 2.60 68.6 8.02 105.3 10.46148 515 0.63 2.60 79.5 11.59 121.0 8.57174 572 0.64 2.55 88.3 8.27 142.1 9.85200 663 0.64 2.55 102.4 10.07 163.4 7.93228 770 0.64 2.55 118.9 8.60 186.4 10.98256 868 0.64 2.55 133.9 11.50 209.3 7.59294 1011 0.64 2.55 155.9 9.61 240.2 10.71354 1190 0.61 2.68 183.6 6.44 289.2 9.06385 1294 0.64 2.53 199.8 8.57 314.6 9.00420 1402 0.64 2.53 216.6 5.67 343.2 7.14465 1562 0.64 2.55 241.3 5.80 380.0 7.35 *3.6 gpm/nominal ton, Pstm = 12 psig, TctwS = 85°F, TcwS = 44°F, TcwR = 54°F, 0.00025 evap. fouling, 0.00025 cond/abs fouling

**.23 m3/nominal kWh, Pstm = 0.83 bar, TctwS = 29.4°C, TcwS = 6.67°C, TcwR = 12.2°C, 0.044 evap fouling, 0.044 cond/absfouling

Pstm – Steam PressureTctwS – Cooling Tower Water Supply TemperatureTcwS – Chilled Water Supply TemperatureTcwR – Chilled Water Return Temperature

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Figure PD-1 — ABSC Part Load Performance – Energy Input vs. Capacity at Various CoolingWater Supply Temperatures; Chilled Water Supply Temperature = 44°F (7°C)(Fixed Chilled Water Flow) without Economizer

PerformanceData

Figure PD-2 — ABSC Part Load Performance – Energy Input vs. Capacity at Various CoolingWater Supply Temperatures; Chilled Water Supply Temperature = 44°F (7°C)(Fixed Chilled Water Flow) with Economizer

Curve Applies for DesignTower Temp. of 85°F

Perc

ent o

f Des

ign

Ener

gy In

put

Percent of Design Load

Curve Applies for DesignTower Temp. of 85°F

Perc

ent o

f Des

ign

Ener

gy In

put

Percent of Design Load

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ElectricalData

Electrical DataFactory wired and mounted power control includes main power connections. Total kW includes solution and refrigerant pump,motors, purge pump motor and control panel. Units may be supplied for operation on 230,460 or 575 volt, 3 phase, 60 hertz poweror 190, 220, 380, 415, 3 phase, 50 hertz power.

Table ED-1 – Electrical Data60 Cycle, 3-Phase

Model Supply Total Motor Total Motor Control Circuit Max Fuse SizeABSC Voltage FLA HP kW Amps MCA Amps112 200 27.8 7.5 6.4 4.0 40 45thru 230 27.0 7.5 6.4 3.0 33 40

465 Tons 460 13.5 7.5 6.4 2.0 20 25575 * 7.5 6.4 1.0 * *

Model Supply Total Motor Total Motor Control Circuit Max Fuse SizeABSC Voltage FLA HP kW Amps MCA Amps112 190 24.4 7.5 6.4 4.0 36 40thru 220 29.0 7.5 6.4 3.0 39 40

174 Tons 380 12.2 7.5 6.4 2.0 18 20415 13.3 7.5 6.4 2.0 20 25

200 190 58.6 15.0 12.0 4.0 79 80thru 220 65.6 15.0 12.0 3.0 85 90

465 Tons 380 29.3 15.0 12.0 2.0 40 45415 30.8 15.0 12.0 2.0 41 45

*Consult FactoryFLA = Full Load AmpsMCA = Minimum Capacity Amps

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Controls Data

Setting The StandardsTrane sets the standard for unitmicroprocessor controls.• Proportional Integral Derivative (PID)

control strategies which provide stableoperation and high accuracy for betterperformance along with feed forwardplus.

• Adaptive Control™ to keep the chiller“on line” and at the same time keepthe chiller away from a major failure;

• Software based safeties that do notdepend on electromechanicalhardware – hardware that meansquestionable reliability and added cost;

• Operator interface that accesses chillerinformation and control adjustments atthe front of the panel.

Trane UCP2™ Unit Control PanelUCP2 adds more flexibility, morereliability and better system performancethan even our most demandingcustomers expect.

FlexibilityTrane offers the ability to adapt tochanges easily and effectively withoutadding prohibitive cost. To provideflexibility, the controller responds to awide variety of needs for:

• System Designs including equipment,operating conditions, and controlsvariations that are either existing orbeing considered for new installations.

Key to designing non-traditionalsystems is the ability to evaluate thecost and reliability issues of thesesystems in comparison to the moretraditional systems. Trane recommendsthe use of C.D.S. Network EquipmentEconomics, the Trane ApplicationsManuals, and consultation with a Tranesales engineer for help in this analysis.

• System Upgrades including the abilityto accommodate changes in the chilledwater system design or equipmentroom requirements or toaccommodate new technologies thatbecome available.

Flexibility

• Modular structure or the UCP2 makes itpossible for the designer to select thesystem controls and associatedinterfaces to Tracer® (or other buildingautomation systems) that are requiredfor the chiller plant design. With thismodular concept, capability can beadded or upgraded at any time — withonly temporary interruption of chilledwater production.

• The operator can quickly program aCustom Report — so that only what isconsidered to be the most frequentlyaccessed/important reports areavailable — at any time, right at thefront of the panel.

• With easy front panel programmabilityof Daily, Service Start-up and MachineConfiguration settings and setpoints,the operator, serviceman, and systemdesigner can customize the use of themicro controller to unique conditions ofthe chiller plant — whether the purposeof chilled water is for comfort coolingor for process cooling.

• All data that is necessary for the safeoperation and easy serviceability of thechiller is provided as standard on allClassic absorption chillers. Options areavailable that provide additionalcontrols/data that are required for: anindustrial/process system design,applications outside of the typicalchilled water system design, the needfor redundant machine protection, orthe desire for more systeminformation.

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ReliabilityTo most people, reliability means“dependable — giving the same resulton successive trials.” However, to ourcustomers it has come to mean “keepchilled water flowing.” In other words,“when I turn the switch on — cold watercomes out.” In order to do this, themicro controller must be aware of whatis happening in the system. But moreimportantly, it must be able to makedecisions and adjustments to keep thechiller running as long as possible evenwhen non-standard conditions exist.Conditions such as bad power or badwater (flow, temperature, fouling) orsystem component failure. Also theTrane UCP2 panel continuously monitorsfor noncondensables and purgesautomatically.• With Enhanced Adaptive Control™ the

controller does everything it can toavoid taking the chiller off line.— Senses evaporator temperature

limit and high temperature limit— Displays a warning message about

the potential condition/safety trip— Take the following corrective action

sequentially as the conditionworsens:- limits loading- prevents further loading- unloads until condition improves- takes chiller off line

• With more diagnostics and diagnostichistory that are time/date stamped andwith help messages, the operator orserviceman can take faster and moreeffective corrective action.

System Performance“Chilled Water System” encompassesmany levels of control: StandaloneChiller, Chiller Plant, Applied System,Central Building Automation System.However, regardless of the system levelbeing design, the unit controls becomecritical not just in making every leveloperate reliably but in facilitating optimalperformance. UCP2 provides morecapability and more intelligence to makethis operation/optimization possible.

Panel Features:The absorption chiller Unit Control Panel(UCP2) incorporates the followingfeatures and components:

Control Functions

• Smart dilution cycle duration based onsystem requirements

• Adaptive evaporator leaving fluidtemperature control

• Low evaporator temperature limit• High solution temperature limit• Solution flow control via AFD• Softloading• Nuisance trip prevention via Adaptive

Control• Chilled water reset• Optimum concentration control• Crystallization recovery via SDR

Controls Data

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Cycle ReportRefrigerant temperatures and pressures:• Solution temperature leaving generator• Solution temperature entering

generator• Generator leaving concentration• Generator cutout and monitor

temperature• Crystallization detection temperature• Crystallization trip temperature• Saturated condenser refrigerant

temperature• Absorber entering concentration• LiBr crystallization margin• Solution temperature entering

absorber• Absorber spray temperature• Solution temperature leaving absorber• Saturated evaporator refrigerant

temperature• Evaporator leaving water temperature• Evaporator entering water temperature• Absorber entering water temperature• Absorber leaving water temperature• Condenser leaving water temperature• Energy input auto/manual/slaved

reported command• Generator Steam Pressure

Pump/Purge Report

• Solution pump— Starts and hours counters— Motor phase currents— Motor phase voltages (optional)

• Purge Pump— Operating mode and status— Refrigerant suction temperature— Pumpout rate— Total pumpout time— Service log

Controls Data

Safeties

• Smart shutdown sequence condenser/absorber loss of flow

• Low condenser/absorber watertemperature

• High pressure cutout• Evaporator leaving fluid temperature

cutout• Motor current overload• High motor winding temperature• Over/under voltage (optional)• Purge limit• Sensor failure detection

Monitored PointsChiller information is available at theoperator interface via a clear languagedisplay. Access to the information isthrough four dedicated report keys:Customer, Chiller, Cycle and Pump/Purge.

Custom ReportUser defined custom report (operatormay choose up to 20 points — from a listof over 100 choices).

Chiller ReportStatus, fluid temperatures, and setpoints:• Operating mode (i.e. run status)• Chilled water setpoint• Outdoor air temperature (optional)• Chilled water reset• Evaporator leaving water temperature• Evaporator entering water temperature• Absorber entering water temperature• Absorber leaving water temperature• Condenser leaving water temperature

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Controls Data

DiagnosticsThe absorption chiller Unit Control Panel(UCP2) provides over 70 differentdiagnostics such as:• Water and refrigerant/solution

temperatures out of range• Loss of system water flows• Sensor and switch faults• Overload trips• Over/under voltage (optional)• Crystallization recovery• Emergency stop• Loss of communication to other

modules• Motor abnormal

Operator InterfaceThe Trane Classic (ABSC) steam-firedabsorption chiller control panel, UCP2, iseasy to use, understand, accessinformation, read, change setpoints,diagnose problems, maintain, and toreset after shutdown.

Convenience

• Enunciation of all information is at thefront panel display (including power,voltage, amps, purge pressures, andnumber of starts data).

• Messages displayed using clearlanguage.

Ease of Use

• Two line, 40 character display that iseasy to read from within a 60 degreeangle

• LCD backlight so that the display canbe read in a variety of equipment roomlighting

• Seven languages available• Metric (SI) units available• Complete character human interface

available• Keypad programmability — no manual

switches or setpoint potentiometers• Logically arranged report groups with

report header and setpoint groups• Selectable security• Variable points updated every two

seconds• Messages that direct user to problem

source via a menu item• Purge sequence of operation

Trane ICS CompatibilityThe Trane Absorption chiller controlpanel, UCP2, is 100 percent compatiblewith the Trane Integrated Comfort™

systems, ICS, UCP2 easily integrates intothe Tracer® family of flexible chiller plantsystem controllers with a single twisted-wire pair communications cable.

For more information on the Traneabsorption chiller unit control panel,please contact your local Trane salesengineer.

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Dimensionsand Weights

PhysicalDimensions/Service Clearances

Table DW-1 - Unit Roughing-in DimensionsUnit A B C D E F G H** J JJ K KK L M** N P Q R S T*** U V W x

ABSC112 11’1” 5’10” 7’3” 7’11” 1’8” 3’4” 2’5” 1’6” 0’8” – 0’6” 0’9” 5’2” 1’1” 3’11” 6’4” 6’2” 9’7” 0’9” 10’10” 3’8” 2’9” 1’7” 5’11”ABSC129 12’6” 5’10” 7’3” 9’4” 1’8” 3’4” 2’5” 1’6” 0’8” – 0’6” – 5’2” 1’1” 3’11” 6’4” 6’2” 11’0” 0’9” 12’4” 3’8” 2’9” 1’7” 5’11”ABSC148 14’1” 5’10” 7’3” 10’11” 8” 3’4” 2’5” 1’6” 0’8” – 0’11” – 5’2” 1’1” 3’11” 6’4” 6’2” 12’7” 0’9” 13’10” 3’8” 2’9” 1’7” 5’11”ABSC174 12’6” 6’1” 7’8” 8’9” 1’9” 3’5” 2’9” 1’7” 0’9” – 0’7” – 5’5” 1’2” 4’0” 6’9” 6’6” 11’0” 0’9” 12’3” 3’8” 3’2” 1’9” 6’3”ABSC200 14’1” 6’1” 7’8” 10’4” 1’9” 3’5” 2’9” 1’7” 0’9” – 1’0” – 5’5” 1’2” 4’0” 6’9” 6’6” 12’7” 0’9” 14’0” 3’8” 3’2” 1’9” 6’3”ABSC228 16’0” 6’1” 7’8” 12’3” 1’9” 3’5” 2’9” 1’7” 0’9” – 1’0” – 5’5” 1’2” 4’0” 6’9” 6’6” 14’6” 0’9” 15’8” 3’8” 3’2” 1’9” 6’3”ABSC256 14’5” 6’4” 8’2” 10’0” 2’1” 3’10” 3’1” 1’10” 0’10” – 1’2” – 5’7” 1’4” 4’0” 6’11” 6’9” 12’7” 0’11” 13’11” 3’8” 3’6” 1’11” 6’5”ABSC294 16’4” 6’4” 8’2” 11’10” 2’1” 3’10” 3’1” 1’10” 0’11” – 1’2” – 5’7” 1’4” 4’0” 6’11” 6’9” 14’7” 0’11” 15’9” 3’8” 3’6” 1’11” 6’5”ABSC354 19’3” 6’4” 8’2” 14’9” 2’1” 3’10” 3’1” 1’10” 0’10” – 1’2” – 5’7” 1’4” 4’0” 6’11” 6’9” 17’5” 0’11” 18’8” 3’8” 3’6” 1’11” 6’5”ABSC385 16’7” 7’1” 8’10” 11’11” 2’1” 4’2” 3’5” 2’0” 1’0” – 1’4” – 5’11” 1’4” 4’2” 7’4” 7’3” 14’6” 0’11” 15’9” 3’9” 3’10” 2’3” 6’10”ABSC420 19’6” 7’1” 8’10” 14’10” 2’1” 4’2” 3’5” 2’0” 1’0” – 1’4” – 5’11” 1’4” 4’2” 7’4” 7’3” 17’5” 0’11” 18’8” 3’9” 3’10” 2’3” 6’10”ABSC465 7’1”

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Dimensionsand Weights

ServiceClearances

Figure DW-1 – Service Clearances

Table DW-4 – Service ClearancesUnitSize A B C D E F G H J K112 23’4 3/4” 13’1 7/8” 9’4” 3’9 7/8” 10’2” 4’1” 3’4” 2’9” 2 3/8” 4 1/4”129 26’3 3/4” 13’1 7/8” 9’4” 3’9 7/8” 10’2” 4’1” 3’4” 2’9” 2 3/8” 4’1/4”148 29’4 3/4” 14’7 7/8” 1’ 3’9 7/8” 10’2” 4’1” 3’4” 2’9” 2 3/8” 1 1/4”174 26’2 3/4” 13”4 3/8” 8 3/4” 4’1 3/8” 10’5” 4’ 3’5” 3’ 2 3/8” 4 1/4”200 29’6 3/4” 15’1 3/8” 10’4” 4’1 3/8” 10’5” 4’ 3’5” 3’ 2 3/8” 4 1/4”228 33’1 3/4” 16’9 3/8” 12’ 1/4” 4’1 3/8” 10’5” 4’ 3’5” 3’ 2 3/8” 4 1/4”256 29’6” 15’2 1/2” 10’ 4’3 1/2” 10’9” 4’ 3’10” 3’ 2 7/8” 5 1/2”294 33’ 1/4” 17’ 1/2” 11’10” 4’3 1/2” 10’9” 4’ 3’10” 3’ 2 7/8” 5 1/2”354 39’ 19’ 11 1/2” 14’ 3/4” 4’3 1/2” 10’9” 4’ 3’10” 3’ 2 7/8” 5 1/2”385 33’2” 17’ 11’11” 4’3” 11’5” 3’10” 4’2” 3’5” 3” 6 3/4”420 39’ 19’11” 14’10” 4’3” 11’5” 3’10” 4’2” 3’5” 3” 6 3/4”465 39” 19’11” 14’10” 4’3” 11’5” 3’10” 4’2” 3’5” 3” 6 3/4”

1. Use cables as slings only as shown.Other lifting arrangements may causeequipment damage or seriouspersonal injury.

2. Each cable (sling) used to lift unit mustbe capable of supporting the entireweight of the chiller.

WARNING

J

K

ANCHOR HOLE DETAILTYP EACH CORNER

DETAIL

FRONT OF UNIT

D C

A

B

F

G

H

E

RIGHT HAND TUBE PULL SHOWN, APPLYTUBE PULL CLEARANCE DIMENSION TOLEFT END FOR LEFT HAND TUBE PULL.

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Dimensionsand Weights Insulation

Table DW-2 - Insulation RequirementsSquare Feet Square Feet

Unit Insulation Unit InsulationABSC-01A, ABSC-01B, ABSC-01C, ABSC-01E 43 ABSC-05J, ABSC-06C, ABSC-070C 63ABSC-01H, ABSC-02A, ABSC-02C 46 ABSC-08C, ABSC-09D, ABSC-11A 79ABSC-02F, ABSC-02J, ABSC-03F 53 ABSC-12A, ABSC-14C, ABSC-16C 185ABSC-03J, ABSC-04B, ABSC-04F, ABSC-05C 58

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Dimensionsand Weights

Table DW-3— Weights and Connection SizesEnglish Units

Weights Connection SizesShipping Operating Cond Abs

Model [lbm] [lbm] [in] [in]ABSC-112 8,900 11,260 3.5 4ABSC-129 9,000 12,300 4 4ABSC-148 10,000 13,440 4 4ABSC-174 11,000 15,100 5 5ABSC-200 12,000 16,350 5 5ABSC-228 13,300 18,150 5 5ABSC-256 15,000 19,150 6 6ABSC-294 16,000 22,920 6 6ABSC-354 17,000 24,700 6 6ABSC-385 19,600 27,800 8 8ABSC-420 22,000 30,300 8 8ABSC-465 22,500 32,250 8 8

Weights andConnection Sizes

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JobsiteConnections

Steam Supply andCondensate Piping

Steam SupplyFigure JC-1 illustrates a typical steamsupply piping illustration that includesthe appropriate hardware.

The steam supply piping should bedesigned in accordance with gooddesign practice, providing strainers,unions and gate valves for ease ofoperation and maintenance. A properlysized steam modulating valve, based ondesign flow and pressure droprequirements, is provided by The TraneCompany.

A hand valve in the steam supply pipingis recommended when the machine willbe out of operation for an extendedperiod. The modulating steam valvemay experience a small amount ofleakage during shutdown. This leakagemay result in heating of the equipmentroom unless the machine is properlyvalved off with a hand valve.

In all applications, it is recommendedthat the steam supply pressure to thecontrol valve inlet not exceed design toassure proper valve close off. If steamsupply pressures exceed design, apressure reducing station should beused to control the steam pressure to thevalve.

The unit control has adjustable featureswhich minimize steam draw on start-up.The adjustable steam control featureallows the user to adapt the machine tothe available steam source capability.

Table JC-1 – Steam Supply and Condensate Return Piping ResponsibilitiesMaterial Provided By Installed By

Item Trane Other Trane OtherEnergy Valve X XT-Type Strainer, Flanged connections, gate valve, drip legw/dirt pocket, float and thermostatic trap, pressure gauge vent X Xand valve, pressure reducing valve, pressure gauge, relief valvecheck valve, connecting piping.

Detail “A”– Energy Valve

Figure JC-1 – Typical Steam Supply Piping

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JobsiteConnections

Steam Supply andCondensate Piping

Condensate HandlingFigure JC-1 illustrates a typicalcondensate system consisting of steamtraps, condensate receivers andcondensate pumps. Such systemsprovide the most economical method ofreturning condensate to a boiler.Properly sized float and thermostatictraps are required for proper operation.The use of bucket traps is notrecommended.

Trane absorption machines use steam-throttling control. A maximum of threepercent of the condensate may flash to avented receiver at full load. This flashingdecreases as the load decreases and isvirtually nonexistent below 70 percentload. When the machine is operating atless than 70 percent load, the pressure inthe generator tube bundle may be belowatmospheric pressure. The temperatureof the condensate leaving the machineunder these conditions is less than 212°F(100°C), so flashing does not occur.

A subcooler may be installed ahead ofthe receiver to cool the condensate to atemperature below the saturationtemperature at atmospheric pressure,thus eliminating flashing entirely. It isrecommended that a cooling mediumsuch as boiler feed water be used tokeep this energy within the system. Thepressure drop through the subcoolershould be minimized.

Figure JC-1 indicates an equalizer lineinstalled to avoid condensate backup inthe machine. The swing check opens if avacuum develops within the tube bundleunder part-load operation.

This prevents development of a lowerpressure in the concentrator than at theoutlet of the trap.

Packaged Condensate SystemsSeveral manufacturers have availablepackaged condensate pump systems,designed for various condensatetemperatures. A decision regarding theuse of these systems with a TraneAbsorption machine should be based ona thorough economic analysis of theparticular installation. The followingfactors should be considered:

1. Condensate may flash in the receiverless than 20 percent of the totaloperating time in a typical installation.The amount of condensate which mayflash varies from a maximum of threepercent of full load to none at less than70 percent load. A subcooler can beused to eliminate the small amount offlashing which may occur when themachine is operating under heavyload

2. The condensate system must preventcondensate from backing up into themachine at part load when thepressure in the generator tube bundleis below atmospheric pressure

3. The condensate system must notdraw supply steam through themachine. This reduces the machineefficiency and may offset any potentialenergy savings, which mightotherwise be realized by the use of thecondensate return system. Also,reduced tube life would result due toerosion.

If the decision is made to use a packagedcondensate pump system, follow themanufacturer recommendationsregarding its application.

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Hot Water PipingThe hot water system must be designedso as to avoid fluctuations in thepressure differences across the controlvalve. Trane absorption chillers for usewith hot water may be used at enteringhot water temperature of 270°F (132°C)or below. Piping for a typical hot waterinstallation using a temperature of 270°F(132°C) or less is shown in Figure JC-2.In this arrangement a three-way energyvalve is used to control capacity byvarying the quantity of hot water flowingthrough the chiller while maintaining aconstant supply and return flow rate. Asshown in Figure JC-3, a two-way energyvalve can also be used where the returnand supply flow rates can vary. Thegenerator design is rated to 150 psig(10.3 bar) with a 400 psig (27.6 bar)optional design available.

When the supply water temperatureexceeds 270°F (132°C), a separatecirculating pump is recommended in arun-around loop as shown in FigureJC-4. The hot water for the absorptionmachine should be taken from a headerinstalled between the hot water supplyand return mains. The flow of hot waterthrough the machine is held constant,but the temperature of the circulatingwater is varied to meet loadrequirements by modulating the amountof high temperature supply water addedto the loop. This is done by installing atwo-way modulating valve at the loopoutlet. The valve responds to the chilledwater temperatures, but limits the watertemperature entering the machine to amaximum of 270°F (132°C).

Hot Water ValvesTrane provides hot water temperaturecontrol valves with the machine forinstallation by the contractor at the jobsite. These valves are selected by TheTrane company based on data providedby the contractor (*i.e. water flow to beused and the design pressure dropacross the valve.)

It is desirable to use the smallest valve,with the highest pressure drop,appropriate to the design water flow andallowable pressure drop in the system.The smaller the valve, the better thecontrol.

Figure JC-2– Hot Water Supply Temperature Piping – 270 F and Below with 3-Way Energy Valve

JobsiteConnections

Hot WaterPiping

Figure JC-3 – Hot Water Supply Temperature Piping – 270 F and Below with 2-Way Energy Valve

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JobsiteConnections

Hot WaterPiping

Table JC-2 – Hot Water Supply Piping ResponsibilitiesMaterial Provided By Installed By

Item Trane Other Trane OtherEnergy Valve (2-Way/3-Way) X XGate valve, balance valve, Y-type strainer w/valve,bypass circuit, check valve, thermometer, pressure gauge, X Xvent shutoff valve, union or flanged connection circulating pumpRupture Disk Assembly X XRupture Disk Piping X X

Figure JC-4 – Hot Water Supply Temperature Piping Above 270 F

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JobsiteConnections

CoolingWater Piping

Figure JC-5 – Cooling Water Piping with Cooling Tower

Figure JC-7 – Cooling Water Piping with Well or River Water

Table JC-3 – Condenser/Absorber Piping ResponsibilityMaterial Provided By Installed By

Item Trane Other Trane OtherCrossover Pipe (factory installed X (factory installed

option) (option)X or X or

Flow Switch (optional) X X X or

Balancing valve, gate valve, thermometer(optional), pressure gauge vent and shutoff X Xvalve, Victaulic or flange connection, pipe stub,strainer, pump.

Figure JC-6 – Cooling Water Piping, Three-Way Mixing Valve

Cooling Water PipingThe cooling water piping design forabsorption chillers differs fromconventional reciprocating or centrifugalsystems in that cooling water passesthrough the absorber section of themachine prior to entering the condenser.

The single stage absorption chiller isdesigned to start and operate withcooling water temperatures as low as55°F (12.8°C). In typical applications, themachine is selected on the basis of thecooling water temperature that will beavailable at full-load and at the designoutside conditions. In air conditioningapplications utilizing a cooling tower, thisis usually 85°F (29.4°C).

With a cooling tower sized at designconditions, the temperature of thecooling water supply to the unit willdecrease with any decrease in coolingload or outside wet bulb temperature.The lower cooling water temperaturewould normally tend to increase thecapacity potential of the unit. In the Tranedesign, the UCP2 adaptive controls willlimit the energy input of the machinebased on the entering cooling watertemperature, thereby preventingoverfiring of the machine.

In typical air conditioning applications,precise cooling water temperaturecontrol is not required. In processapplications, however, where extremelyclose control of leaving chilled water isrequired, it is recommended that a towervalve be used to maintain cooling watertemperature at a specified temperature.Constant cooling water temperatureallows the unit control valve to moreprecisely control leaving chilled watertemperature. Also, in applications wherewell water or other cooling water will beavailable at a temperature below 65°F(18.3°C), a control valve is recommendedto maintain the temperature at 65°F(18.3° C) or above. Changes incondenser water temperature should notexceed 1 degree F per minute betweenthe range of 75-95°F (23.9-35°C).

Figure JC-5 illustrates a typical airconditioning installation without acooling tower control valve. Figure JC-6illustrates typical cooling water piping inapplications where a three-way valvemay be required. Figure JC-7 illustratestypical cooling water piping utilizing wellor river water.

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MechanicalSpecifications

GeneralUnit is a complete single effect steam orhot water fired absorption chillerpackage built in an ISO 9001environment. Chiller consists ofgenerator/condenser section,evaporator/absorber section, controls,pumps, heat exchanger, and energycontrol valve. All units are of hermeticdesign, factory assembled and leaktested prior to shipment. Unit controlsare factory mounted and wired includingmicro electronic control panel, sensorsand purge system, energy valve can befactory mounted and wired as an optionon steam fired units. Unit is painted priorto shipping with two coats of a waterbase air dry primer. Standard method ofshipment is by truck from the USA.

Generator/Condenser-Evaporator/AbsorberThe shell material is carbon steel.Standard generator tube material iscupro-nickel, evaporator is copper,absorber is cupro-nickel and condenseris copper. Tubes are mechanically rolledinto the tube sheets and are replaceablefrom either end. Condenser, evaporatorand absorber tube supports are fixed.Generator consists of fixed and floatingtube supports to allow for even tubeexpansion.

Generator/Condenser-Evaporator/AbsorberDesign working pressure for the waterboxes is 150 psig (10.3 bar). All tubebundles are tested at 150 percent ofdesign working pressure. All waterboxes have gasketed removable coversfor access. Water connections areprovided with either victaulic or raised-face flanged connections.

PumpsEach aborption machine is equippedwith a single, hermetic pump motorassembly having three pump impellerson a common shaft. The pump bearingsand the motor are cooled using distilledrefrigerant water from the evaporatorsump. There is a mechanical-magneticstrainer assembly in the pump motorcooling circuit. The pump motor isfactory mounted and wired. The pumpmotor is removable without breaking themachine vacuum or removing solutionfrom the machine. Also, pump bearingreplacement is possible withoutremoving solution or allowing air toenter the machine.

Purge SystemNoncondensable gases are removedfrom the machine through a purgesystem termination in a cupronickelcollection chamber located in theabsorber section. This collectionchamber is evacuated through anelectrical motor driven vacuum pump.The purge system should be operatedonly as needed to remove anynoncondensible gases that may bepresent. The machine is protected fromre-entry of noncondensible gases by thedischarge reed valve which provides apositive seal.

GeneratorThe shell is carbon steel. Tube sheets aresteel and standard generator tubes areconstructed of copper nickel. Thegenerator has fixed and floating tubesupports to allow for even tubeexpansion. For hot water as the energysource, the generator is ASME designedand stamped for 150 psi (10.3 bar).Generator/condenser includes rupturedisk, which is sized to meet ANSI/ASHRAE B 15.

Optional Lithium BromideFilterThe filter system consists of the filterassembly and the associated piping andfilter isolation valves needed foroperation and maintenance. The mainfilter body is stainless steel with aremovable, cleanable, stainless steelinternal 150-micron element. The filterisolation valves allow service of the filterassembly without disturbing operationof the rest of the machine.

Control PanelThe UCP2™ is a microprocessor-basedchiller control system that providescomplete stand-alone operation. It is afactory mounted package including a fullcompliment of controls to safely andefficiently operate the Absorption LiquidChiller. The UCP2™ provides:• Chilled water temperature control• Concentration control

System Features and Functions

• User interface with a 40 character, 2line display and a 16 key keypad,capable of displaying 7 languages andSI or English units

• Passwords for protection of unit setupand configuration

• Chilled water pump control• Absorber/condenser pump control• Automatic and manual control of

solution and refrigerant pumps• Economical solution flow control of the

low temperature solution pump andabsorber pump via an adjustablefrequency drive

• Anti-crystallization through dilutioncontrol

• Automatic and manual purge system• Chilled water reset• Two-way valve assembly for hot water

flow control or steam flow control• Concentration control• Steam adaptive flow control

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MechanicalSpecifications

Adaptive Limits

• Evaporator water temperature limit• Low absorber/condenser limit• Soft-loading control

System Protection

• Evaporator freeze protection• Chilled water flow confirmation• Cooling water flow confirmation• Emergency stop/shutdown• Under/over voltage detection

Monitor and Displays

• Chilled water temperature entering andleaving

• Absorber/condenser watertemperature entering and leaving

• Solution concentrations• Solution temperatures• Total pump current• Unit voltage• Chiller run time and starts• Purge operation and run time• Alarm light• Diagnostic messages• Help screens• Evaporator water flow (option)• Cooling water flow (option)

Interfaces To UCP2™

• External machine manual reset alarmindication output

• External machine auto reset warningindication output

• External limit warning indicationoutput

• Maximum capacity indication output• External auto-stop/emergency

shutdown• Interface to Tracer Summit™

• External chilled water setpoint• Tracer™ controlled relay• Printer interface

Contractor Responsibilities1. Install the unit on a level surface.

Neoprene isolation pads supplied bythe manufacturer shall be placedunder the unit.

2. Connect unit control panel to alloperating external safety andauxiliary control devices.

3. Insure that piping adjacent to themachine does not restrict removal ofheaders for inspection, cleaning andremoving tubes.

4. Provide gauge cocks and optionalthermometer wells for temperatureand pressure readings at the inletand outlet of the evaporator, at theinlet and outlet of the absorber, andat the outlet of the condenser.

5. Provide balancing valves in allexternal water circuits to allowbalance and trim of the system.

6. Provide and install strainers ahead ofall pumps and automatic modulatingvalves to insure proper pump andvalve operation.

7. Insulate the chilled water headersand other portions of the unit, aspointed out in the manufacturer’sinstallation literature to preventcondensation on cold surfaces andheat loss from hot surfaces to theequipment room. External unit pipeswith surface temperaturessufficiently hot to constitute a dangerto operating personnel shall also beinsulated.

8. Provide and install a flow switch inthe chilled water circuit and interlockit with the starting control circuit ofthe unit. Proof of flow is requiredprior to permitting unit operation.Provide and install a flow switch in

the tower water circuit, which shallbe interlocked with the startingcontrol circuit of the unit such thatproof of flow is required to preventmachine damage

9. Provide necessary distilled ordemineralized water for refrigerantcharge, and trim charge.

10. Provide labor to charge the machinewith lithium bromide solution andrefrigerant water, and assist inmachine starting and calibrationunder supervision of themanufacturer’s representative.

11. Provide sufficient sized vacuumpump and personnel to evacuate theunit prior to charging (if required).

12. Install any control componentsprovided by the manufacturer forinstallation external to the machine.

13. Furnish and install, external to theunit control panel, a separately fuseddisconnect switch, if not provided.

14. Install required power supply wiringto the control panel. Use copper wireonly.

Insulation RequiredInsulation is required on cold areas toprevent sweating. All insulation isinstalled in the field and provided/installed by others.

Insulation for cold insulation area shouldbe ¾-inch (19 mm) Armaflex or equalshould be applied to evaporatorwaterboxes, refrigerant storage tank,refrigerant pump and refrigerant piping.

StandardConversionTable

Since The Trane Company has a policy of continuous product and product data improvement, it reservesthe right to change design and specifications without notice.

Literature Order Number

File Number

Supersedes

Stocking LocationThe Trane CompanyAn American Standard Companywww.trane.com

For more information contactyour local sales office ore-mail us at comfort@trane.com

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New

La Crosse