Trane ClassicAbsorption Series

Single-Stage Hot Water orSteam-Fired Absorption Water Chillers112-465 Tons

Built for Industrial and Commercial Applications

ABS-PRC005-ENAugust 2005

ABS-PRC005-EN 2005 American Standard All rights reserved

Introduction

History of Trane Absorption ChillersTrane 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 340F, or hot watertemperatures up to 270F. These chillersare ideal for situations requiring chilledwater in the range of 40-50F. 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 Tranes 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.

Aftermarket SupportAll 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. Tranes 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

generator, evaporator and absorber;copper tubes in the condenser

Factory leak tested to help assureproduct integrity

Tubes are individually replaceable fromeither end of machine

Solution pump motor can be servicedwithout 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 CycleRefrigeration CycleThe Trane Absorption Cold Generatoruses 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 dil