direct-fired absorption water chillers, 380-750 … abs-ds-6 may 1997 first printing trane horizonŽ...

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AB

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ABS-DS-6May 1997First Printing

Trane Horizon�

Absorption Series

Direct-FiredAbsorption Water Chillers380-750 Tons

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Introduction

©American Standard Inc. 1997

What�s NewThis catalog introduces additional sizesto the Horizon� direct-fired line ofchillers. This advanced direct-firedHorizon� absorption chiller wasdeveloped with the assistance of theGas Research Institute. The modelscurrently available are:

� ABDA-380� ABDA-440� ABDA-500� ABDA-575� ABDA-660� ABDA-750

Highlights of the Horizon� direct-firedchillers include:

� Easily disassembled and reassembledinto two or three pieces for thoseapplications which require moving themachine through a smaller space.

� Factory mounted and wired Weishauptlow NOx burner.

� Variable speed drives on the absorberpump and low temperature generatorpump which provide improved partload efficiency and a larger operatingmap.

� 8 to 1 turndown on the burner usingnatural gas.

� Individual pumps with 50,000 hourservice intervals.

� The manufacturing process used tobuild Horizon chillers is based on theLa Crosse Business Unit�s ISO 9001certified quality system. This systemfollows procedures which define howquality assurance activities aremanaged, performed, and monitored.Included in the system are verificationcheckpoints from the time the order isentered until final shipment. Inaddition, during development,products are subjected to formalplanning, review and validation steps.The system is designed to assuremaximum consistency in meetingcustomer requirements.

Product Application GuideThere are many benefits to using thenew high efficiency, reliable Horizon�

absorption chiller. These benefitsinclude peak electrical shaving duringhigh demand periods and replacementof existing lower efficiency single ortwo stage absorption equipment.Absorption chillers are environmentallyacceptable and offer smart controls.Direct-fired absorption chillers can beapplied to many building designs andchiller plant configurations in allsections of the country and the world.

The Trane Horizon� chillers aredesigned for comfort cooling orprocess applications when acontinuous and reliable supply of 40Fto 70F chilled water is needed.Absorption chillers are normallyapplied where there is economicjustification that supports loweroperating costs. Their primaryadvantage is the ability to providecooling and/or heating using naturalgas or No. 2 fuel oil.

Combination SystemsUsing a combination of electric chillersand absorption chillers for airconditioning loads, peak energysavings can be realized. Theabsorption chiller is used to shaveseasonal billable peak power demandsduring summer operation, and theelectric chiller is run below the alloweddemand limit, reducing costly demandcharges.

Trane not only has the ability to provideequipment for any type of buildingapplication but also has experiencedapplications engineers that can helpwith these designs. Trane offers bothelectric chillers and absorption chillerswith the unit control panel (UCP2) asstandard. This is an advantagebecause although the chillers havedifferent features and modes ofoperation, the chiller control panellooks 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 Trane Tracer® system,a chiller plant has almost unlimitedoperational flexibility and all equipmentis supplied from a single source.

Multiple MachinesTrane direct-fired absorption chillersmodulate smoothly from part load tofull load conditions automatically. This,combined with inherent reliability,often makes multiple machineinstallations unnecessary.

Multiple machine installations can bedesigned for parallel or series flow ofchilled water through the machines.There are advantages to each design.

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

Series flow permits design chilledwater temperature at light loads withone machine �off�. However, at alloperating conditions, the chilled waterpressure drop through the machine ishigh.

A decision concerning whicharrangement is best for an individualsystem should be based on an analysisof system water and temperature riserequirements, system and machinepressure drop characteristics, andinstallation cost. The control of multi-machine installations is discussed inthe control section of this catalog. Inmulti-machine installations, as in singlemachine installations, provisions mustbe made to safeguard the machinefrom possible freeze-up in event ofchilled water flow interruption.

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Introduction 2

Features Highlights 3

Features and Benefits 4

Application Considerations 9

Selection Procedure 12

Model Number Description 13

Performance Data 14

Jobsite Mechanical Connections 21

Control Data and Connections 23

Electrical Data and Connections 26

Weights and Dimensions 27

Dimensional Data 34

Mechanical Specifications 38

Contents

Integrated Comfort� SystemApplication�Chilled Water System� encompassesmany levels of control: standalonechiller, chiller plant, applied system,and central building automationsystem. Regardless of the system levelbeing designed, unit controls becomecritical not just in making every leveloperate reliably but facilitating optimalperformance. UCP2 provides morecapability and more intelligence tomake this operation/optimizationpossible.

Trane has set the standard for unitmicroprocessor controls:

� Proportional integral derivative (PID)control strategies providing stableoperation and higher accuracyresulting in better performance;

� Adaptive Control� keeping the chiller�on line� and at the same timeoperating safely.

� Software based safeties that do notdepend on electromechanicalhardware that mean questionablereliability and added cost.

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

Trane 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.

System Upgrades including the abilityto accommodate changes in the chilledwater system design, equipment roomrequirements, or to accommodate newtechnologies as they become available.

The Trane absorption chiller controlpanel, UCP2, is compatible with TraneIntegrated Comfort� Systems (ICS).UCP2 easily integrates into the Tracer®

family of flexible chiller plant systemcontrollers with a single twisted-wirepair communications cable.

Features Highlights

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Made in the USAThe new line of Trane Horizon�

absorption water chillers is the only lineof two-stage absorption productsdesigned and built in the USA. Tranedesigns, tests and manufactures in anISO 9001 environment in La Crosse,Wisconsin.

Leadership and QualityTrane has been the market leader inabsorption water chillers for over 35years. The company has supportedabsorption technology through thecontinuous application, design andmanufacture of absorption waterchillers since 1959, with over 10,000units built. Trane�s commitmentextends to the application of newproduct technology developmentthrough extensive laboratory testing.Factory-trained technicians providestart-up, maintenance and emergencyservice support.

Fully Automatic PurgeTrane�s new purge system removesnon-condensables from the machinecontinuously and automatically whilelogging purge information through theUCP2. This is designed to preventdamage to the machine whilemaintaining the machine�s peakperformance.

Concentration ControlThe UCP2 concentration control adjuststhe energy input for optimum solutionefficiency. The concentrated solution istypically maintained 15 degrees F fromthe theoretical crystallization point.This is called the crystallization margin.As strong solution concentration andtemperature varies, the theoreticalcrystallization temperature changes.The control system adjusts the energyinput to maintain the crystallizationmargin throughout the load range. Automatic Crystallization Protection

When/Why it OccursCrystallization results from operating conditions that cause the solution to solidify,forming salt crystals which precipitate out and eventually restrict flow. This mayresult in a chiller failure that is difficult to correct. Concentration control providedby the UCP2 control system maintains solution concentrations at safe levels toavoid crystallization. However, in the event of crystallization, SDR, which is anautomatic corrective action process, is activated to reverse any crystallizationwhich has occurred and return the chiller to normal operation.

How UCP2 uses Sensing, Detecting and Recovery (SDR) to Prevent CrystallizationThe objective of SDR is to detect the onset of crystallization by continuouslysensing the critical cycle temperature points and executing a recovery cycle asappropriate. In the worst case, SDR will shut the machine down safely whenreliable operation is not possible. The UCP2 concentration control is designed tomaintain a predetermined crystallization margin. The SDR system featureprovides a secondary line of defense against crystallization beyond theconcentration control system. The SDR feature is designed to protect the machinefrom transient conditions the machine does not control.

Features andBenefits

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ReliabilityAll major components of the Horizon�

direct-fired absorption chiller wereselected based on a 20+ year minimumdesign life. Major components includetubes, shells, internal parts,waterboxes, unit piping, solution heatexchangers, and pumps. Extensivetesting was performed on thesecomponents (such as materialcorrosion rates) in the Trane laboratory.

This product was designed to operatereliably in your system. Here are somefeatures which provide dependableperformance:

� UCP2 controls� Quality industrial grade materials which

include:- Stainless steel for key components of

the chiller including evaporator pan,direct-fired generator tubes, direct-fired generator tube sheets and misteliminators

- Cupro-nickel tubes in the absorber,evaporator and second stagegenerator

- Effective, environmentally acceptablecorrosion inhibitors

� Fixed and floating tube supports whichallow for expansion of tubes withoutproblems of high stress

� 50,000 hours design life solutionpumps

� Hermetic integrity resulting fromsuperior design and manufacturing

� Factory leak tested

Ease of Installation� Modular design to facilitate reliable

disassembly and reassembly for easyaccess into existing buildings

� Victaulic� water connections, factorymounted and commissioned controlscomplete with sensors, drives, valves,actuators and purge

� Factory installed crossover pipe cutsdown on field fabrication and labor

� Factory mounted and wired low NOxburner

Dedicated Support� Over 35 years of continuous absorption

production and customer support� Professional engineering expertise

from the local Trane sales office withheadquarters applications, andengineering support

Serviceability� All tubes individually replaceable� Marine style waterboxes on the

absorber and condenser allowing tubecleaning without removing waterconnections

� Training of owner�s operatingpersonnel

� Quality post-warranty service fromtrained technicians

� Parts readily available� Local professionally trained service

personnel, backed by headquartersexperts

� Customizable extended warranty plans

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

control. Adaptive Control� strategiesfor stable, efficient, reliable, andoptimal chilled water temperaturecontrol

� Easy-to-use operator interface- Two line 40 character backlit LCD

display in clear language- English or SI units- Standard and custom reports- Over 200 diagnostics including time

and date stamping� Complete range of standard safety

controls including: pump motorprotection, low refrigerant watertemperature cutout, low leaving watertemperature cutout, high interstagepressure cutout

� Integration with Trane�s buildingautomation systems - all via a singletwisted wire pair

� Building Automation System (BAS)interface capabilities

PumpsA total of four pumps are provided withthe Horizon� direct-fired absorptionchiller. Each pump consists of anintegral motor and pump mounted ona steel shaft. The bearings arelubricated and cooled by the fluid thatis pumped. This system is integratedwith the pump so that no externalpiping or filtration is required.

WaterboxesMarine style waterboxes are providedfor the cooling water side only.Provisions have been made to allow forsupport of box covers during removal.All waterboxes are designed forstandard working pressure of 150 psig.

InhibitorsLithium molybdate is used as thecorrosion inhibitor and has thefollowing characteristics:

� Non-hazardous� Will prevent corrosion of steel, copper

and stainless steel materials at theconditions during operation andshutdown of the chiller

� Stable chemical over the entireoperating range of the chiller

Performance AdditiveThe performance additive is octylalcohol. This chemical has thefollowing features:

� Non-hazardous� Stable over the range of operating

conditions that it is exposed to duringshutdown and operation of the chiller

No CFC�sIn addition to the design benefits ofusing an absorption machine, the TraneHorizon� direct-fired absorption chillersare completely non-harmful to theenvironment. They contain no CFC�s.All cooling is achieved using lithiumbromide as the absorbent and water asthe refrigerant.

Factory TestsFactory leak tests are performed toassure the machines are leak-freebefore shipment. The final leak testinvolves the use of a helium massspectrometer. The mass spectrometeris so sensitive to helium it can detect aleak that will pass only one pound ofhelium in 10,000 years.

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Standard Specification� Victaulic� water connections� Industrial grade tubes unmatched in

the industry- Direct-fired generator -409 stainless steel tubes andtubesheets.

- Low temperature generator -.028� wall 95/5 CuNi

- Evaporator - .030 wall 95/5 CuNi- Absorber - .028� wall 95/5 CuNi- Condenser - .028� wall Cu

� Factory mounted and testedmicroprocessor controls

� 150 psig marine style waterboxes onthe condenser and absorber sections

� Cooling water crossover pipe factoryinstalled between the absorber andcondenser

� Connections and valves are provided asstandard for lithium bromide filter

� Factory mounted and installed low NOxburner on all units. Flue gasrecirculation is used for 575-750 tonunits to achieve low NOx.

Optional Specification� 150 psig raised face flanges for the

evaporator, condenser, and absorberwater connections

� Wooden pallets can be provided undereach leg for handling at installation siteor to facilitate ocean shipment

� Disassembled unit - Factory provisionsallowing easy disassembly andreassembly of major components inthe field

� Lithium bromide filter� Factory installed cold insulation� Factory supplied and field installed hot

insulation� Simultaneous heat/cool or cooling only/

heating only unit

Design Options� Enhanced corrosion resistant tube

alloys available for special applications� 300 psig water boxes� Special code requirements� Marine style waterboxes on the

evaporator

Industrial Options� Sacrificial anodes in the waterboxes� Corrosion resistant paint. Two step

epoxy paint system provides protectionin corrosive environments such aschemical plants or salt water locations

Special ApplicationsThe Absorption Team is flexible andcreative. We are capable of taking onthe design challenges necessary tobuild a custom unit to specificrequirements.

� Special corrosion resistant tubing� Custom control configurations� Installation extremes� Decades of experience in designing and

installing absorption equipment forunique applications

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Refrigeration Cycle

Cooling CycleThe absorbent/refrigerant combinationis a traditional lithium bromide/watersolution. The dilute solution is firstpumped from the absorber to the lowtemperature generator, where it ispartially concentrated. A heatexchanger transfers heat from thegenerator and preheats the incomingsolution.

Part of the solution is then pumped tothe direct-fired (high temperature)generator where it is furtherconcentrated, while the rest of the flowfrom the low temperature generator ismixed with the strong, concentratedsolution coming back from the direct-fired generator. This mixed solution isthen combined with additional solutionfrom the absorber to form the absorberspray.


Evaporator/AbsorberLiquid refrigerant � water� enters theevaporator from the condenserthrough a throttling pipe. As therefrigerant passes to the lowerpressure evaporator, flash boilingoccurs, cooling the remaining liquidrefrigerant to the evaporator saturationtemperature. This chilled refrigerantenters the evaporator pan and iscirculated continuously to theevaporator sprays system by therefrigerant pump. The transfer of heatfrom the system water to therefrigerant causes the refrigerant tovaporize or boil, cooling the systemwater. This refrigerant vapor flows tothe slightly lower pressure in theabsorber.

In the absorber, refrigerant is absorbedby the lithium bromide solutionbecause of its high affinity for watervapor. This is the fundamentalprinciple of the absorption process.The pressure in the absorber isdetermined by the temperature andconcentration of the solution sprayedover the tubes. A mixed concentrationof the solution from the generators andthe absorber is pumped through theabsorber spray system to thoroughlywet the tubes and provide theopportunity for the refrigerant vaporfrom the evaporator to be absorbed bythe lithium bromide solution.

As the refrigerant vapor is absorbed bythe solution, it transfers the heatacquired in the evaporator to thecooling water which is pumpedthrough the absorber tubes. Thediluted solution is then pumpedthrough the heat exchangers by thesolution pumps to the generators toreconcentrate or regenerate the lithiumbromide solution.

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Low Temperature GeneratorThe dilute solution is pumped into thelow temperature generator after beingpreheated by the low temperature heatexchanger. The purpose of thisgenerator is to produce refrigerant forthe cycle. To achieve this, vapor fromthe direct-fired generator is used as theenergy source to boil the solution. Thisvapor condenses inside the tubes,flows to the condenser sump, andbecomes part of the refrigerant for thecycle.

The intermediate concentrationsolution leaving the low temperaturegenerator has two paths; the first is tothe generator pump and on to thedirect-fired generator, the second ismixed with concentrated solutioncoming back from the direct-firedgenerator, forming a mixedconcentration for the absorber spraysystem.

Solution Heat ExchangersThe low temperature heat exchangerrecovers heat from the mixedconcentration solution and preheatsthe dilute solution going to the lowtemperature generator. Preheating thedilute solution reduces the heat energyrequired to induce boiling within thelow temperature generator. In turn, thereduction in mixed solutiontemperature decreases the load on thecooling tower.

The high temperature heat exchangerrecovers heat from the strongconcentrated solution and preheats theintermediate solution going into thedirect-fired generator to furtherconcentrate the preheated intermediatesolution. Preheating the solutionresults in improved cycle efficiency.

Direct-Fired GeneratorThe direct-fired generator usescombustion of natural gas, No. 2 fueloil, or propane gas as energy sources.The intermediate concentrated solutionenters at the bottom of the generatorafter being preheated by the hightemperature heat exchanger. Heatfrom combustion is used to boilrefrigerant from the solution,producing refrigerant vapor for the lowtemperature generator. The refrigerantvapor flows to the low temperaturegenerator and the concentratedsolution returns to the absorberthrough the high and low temperatureheat exchangers.


CondenserRefrigerant is introduced into thecondenser from two sources; liquidrefrigerant from the tube side of thelow temperature generator andrefrigerant vapor produced by the lowtemperature generator.

All refrigerant vapor condenses andreturns to the evaporator as liquidthrough the J-tube. This devicemaintains a liquid seal and therefore apressure differential from thecondenser to the evaporator.

The heat of condensation is rejected tothe cooling water loop.

Heating CycleThe vapor generated by the hightemperature generator can go to eitherthe low temperature generator or theseparate heating bundle as shown onthe cycle diagram. Fluid flow throughthe tubes of the heating bundle at atemperature cooler than the saturatedsteam or vapor temperature coming offthe direct-fired generator, will causesome of the vapor to condense onthese heating tubes. This will make thewater temperature rise. Thecondensed vapor then simply drainsback into the direct-fired generator tobe recycled. With this arrangement theburner will be called upon to supplyheat for either or both the cooling andheating cycles, up to the maximumspecified burner input.

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ApplicationConsiderations

GeneralTrane Horizon� direct-fired absorptionchillers are designed for use in airconditioning applications requiring acontinuous and reliable supply ofchilled water in the range of 40 F to 70F. The Horizon direct-fired model rangeis 380 tons through 750 tons. Direct-fired machines are most often usedwhere an economic evaluation ofrefrigeration equipment justifies ahigher first cost to obtain a loweroperating cost.

Catalog application data is based onARI-560-92. All selections are based ona fouling factor of .00025 on the interiorof all tube surfaces. Selections basedon the use of fluids other than water, orwith other fouling factors can beobtained by contacting a local Tranesales engineer.

In planning an absorption refrigerationinstallation, consideration must begiven to provide the following:

� Structural support� Service access� Tube pull space� Piping access for tube maintenance� Condensate handling� Condenser water temperature control� Chilled water flow control� Condenser water flow control� Chilled and condenser water flow limit� Simultaneous heat/cool application

Operating LimitsTrane direct-fired absorption chillerscan produce chilled water attemperatures as low as 40 degrees Fand hot water for heating applicationsat temperatures as high as 180degrees F.

Water flows within the limits indicatedon the appropriate selection charts willensure that tube water velocities don�texceed 11 feet per second. Changes inchilled water flow or condenser watertemperature should not exceed 3percent of chilled water flow perminute or a 1 degree F tower watertemperature change per minute.

Cooling Water PipingThe cooling water piping design forabsorption chillers differs fromconventional reciprocating andcentrifugal systems in that coolingwater on the 380-500 ton chillers,passes through the absorber section ofthe machine prior to entering thecondenser. On the 575-750 ton chillersthe cooling water is a parallel flowthrough the absorber and condenser.

With all absorption chillers, no matterhow the tower water flows throughthe absorber and condenser sections,the cooling water flow must becontrolled by the absorption machineas a function of normal control andmachine safety.

Trane absorption machines aredesigned to operate with cooling watertemperatures as low as 55 F at reducedloads. In typical applications, themachine is selected on the basis of thecooling water temperature available atfull load. This is usually 85 F.

With the cooling tower sized for designconditions, the temperature of thecooling water supplied to the unit willdecrease with any decrease in coolingload or depression of outside wet bulbtemperature. These reduced coolingwater temperatures will normally tendto increase the potential capacity of theabsorption machine. The Trane controlsystem takes advantage of thisimproved efficiency by using automaticcontrols that limit the energy input tothe machine based on entering coolingwater temperatures.

Cooling water temperature control maybe required at part loads. At part loadswith cold outside conditions, cycling ofthe cooling tower fan can result inundesirable variation of leaving chilledwater temperature. Consequently,Trane recommends consideration ofmultiple speed tower fans or a coolingtower bypass valve to reachequilibrium at all load conditions. Therate of cooling water temperaturechange allowable is 1 degree perminute.

Figure AC-1 illustrates therecommended method to applycooling water to the Trane Absorptionmachine.

Water temperature sensors are factory-installed on the entering and leavingsides of the absorber and condenserwater connections. The operatingtemperatures can be monitored fromthe control panel.

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Water TreatmentThe use of untreated or improperlytreated water may result in scaling,erosion, corrosion, algae or slime. It isrecommended that the services of aqualified water treatment specialist beused to determine what treatment, ifany, is advisable. The Trane Companyassumes no responsibility for theresults of untreated, or improperlytreated water.

Cooling Tower Water FlowThe ARI standard gpm/ton forabsorption chillers is 4.5, but lower flowthrough the condenser and absorbersection will present an opportunity fora smaller tower and smaller condenserpump or piping. Trane direct-firedabsorption chillers were designedaround 3.6 gpm/ton but have the abilityto go as low as 3.0 gpm/ton at slightlyreduced capacities. By designing asystem around lower flows, there willbe significant annual chiller plantelectrical energy savings and lowerinitial equipment costs. For moreinformation on lower flows on thecooling tower water circuit, refer to theappropriate Trane Engineering Bulletin.

Electric ServiceFactory wired and mounted powercontrol includes main powerconnections. Units may be supplied foroperation on 230, 460, or 575 volt, 3phase, 60 hertz power. Also 190, 220,380, 415 volt, 3 phase, 50 hertz power isavailable.

Machine InstallationA housekeeping pad or support rail isrecommended to elevate the machinefor maintenance. Any foundation padshould provide adequate structuralsupport and keep the installed machinelevel within 1/8-inch by length and width

for reliable operation. Leveling markson the tube sheet can be used to checkthe machine after it is positioned on thepad.

Separated Machine SectionsDisassembled machines are alsoavailable factory-separated into two orthree main sections as an option. Theunits can ship separated or assembledand tack welded in the appropriateplaces for easy disassembly andreassembly at the jobsite. The threepiece option ships as an evaporator/absorber section, the direct-firedgenerator section and the lowtemperature generator/condensersection. The two piece option ships theevaporator/absorber and lowtemperature generator/condenser asone piece and the direct-fired generatoras a separate piece.

Fuel HandlingThe standard burner is designed fornatural gas as the primary fuel source.Local codes determine how this fuel isemployed. The gas supply trains arefurnished by the burner manufacturerbased upon the local codes, availablegas pressure, and the gas flow rate.The gas train can be sized for designgas supply pressures ranging from 9inches water column at the inlet up to 5psi depending on the size and model ofthe burner. The burner, gas train,burner control panel, and burner frontplate sections are provided andcompletely assembled, installed andwired prior to shipment.

Exhaust Gas DuctWith the installation and properoperation of fuel burning equipment,consideration of the proper sizing,configuration and control of stacks andbreeching is very important.

Proper stack design balances thetheoretical draft against the pressuredrop in the system in order to providethe required draft pressure at the outletof the machine at all conditions.

The Trane absorption combustionsystem is engineered to produce a fluegas temperature up to 380 F and apressure of 0 +/- 0.2 inch W.C. at theoutlet of the first stage generator. Thestack must be designed to maintainavailable draft between -0.2 and 0.2inch W.C. at the outlet of the first stagegenerator. Whenever possible, eachmachine should be vented outside thebuilding by the most direct route, withits own separate stack.

CAUTION: Whenever there is apositive stack draft pressure, there doesexist the chance of leaking flue gas intothe equipment room. It is highlyrecommended to avoid positive stackpressures to eliminate this potentialproblem.

To eliminate friction loss, unnecessaryturbulence, vibration and resultingnoise, the shape of breeching andstacks should be considered. Roundbreeching and stacks have a morefavorable effect on burner operationand are preferred over other shapes.The basic configuration is a verticalstack mounted to a single machine. Todetermine the available draft at theoutlet of the generator it is necessary tomeasure the height of the stack and theoutside ambient temperature. It alsoshould be noted that there is a squareconnection at the direct-fired generatorflue access point. This allowsconnection to either square or round(preferred) gas ducting systems.


Expansion Tank

C/H

Loa

d

Air Vent Valve

ChilledWater Pump Drain

Valve

T

T

Chiller

ABSMachine

Drain Valve

Air Vent Valve

StopValve

StopValve

Pressure Gauge

Thermometer

TowerBypass

TempControl

Stop Valves forChemical Cleaning

CondenserWater Pump Sump

Temp ControllerTC

Cooling Tower

T

T

Flow Switches ( ) by Others

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To verify the stack design, determinethe available draft at the minimum andmaximum ambient temperatures andthe minimum and maximum flue gasflow rate. All of these pressures shouldfall within specifications of outletpressure. If the outlet pressure fallsoutside of the required pressure, thestack diameter sizing should bechanged to maintain specified outletpressure, or a barometric dampershould be added if the draft is greaterthan negative 0.2 inches. Other thingswhich affect stack design are windconditions and profiles of nearbybuildings.

If the stack cannot be run verticallyfrom the chiller, the horizontal runshould be as short and straight aspossible with a minimum number ofbends. For more information onexhaust ducts refer to the installationmanual, or consult a local stackdesigner.

Damper ConsiderationsIn order to control the draft for properburner regulation and combustion ofair and gases, a barometric draftcontrol is sometimes required.

Excessive drafts cause a condition thatcan damage the chiller and waste asmuch as 15 percent of the fuel.

Whenever a forced draft burner is usedwith a natural draft stack, the draft mustbe controlled to remain reasonablyconstant. If this is not done, the airoutput of the burner fan will vary inproportion to the amount of draftpresent. Control of draft under theseconditions is important and should beaccomplished by either an electric over-fire draft control system or abarometric damper. For moreinformation on damper considerationsrefer to the installation manual.

Operating AmbientsThe minimum recommended ambienttemperature with the machine shutdown is 40 F. If lower ambienttemperatures are expected, specialadditional protective measures arerequired. Machines installed outdoorswhere ambient temperatures will dropbelow the minimum must be modifiedand have heated enclosures.

Combustion AirThe machine room must be ventilatedto assure that all exhaust gas isremoved and sufficient burner makeupair is available for efficient combustion.A positive or neutral room pressuremust be maintained at all times. At notime should the equipment roompressure be allowed to drop below theexhaust pressure.

Four-Pipe to Two-Pipe HeatingConsiderationThere are many applications in which atwo-pipe heating system is neededrather than a four-pipe system. TheHorizon� absorption chiller comes as astandard four-pipe system when theheating option is selected, but can beconverted to a two-pipe system withthe application of control valves. Formore information regarding two-pipevs. four-pipe systems see theappropriate Trane Engineering Bulletin.

Combustion FuelsAll combustible fuels have both ahigher heating value (HHV) and a lowerheating value (LHV). HHV includes thelatent heat of vaporization of water inthe hydrocarbon combustion process.LHV does not include this additionalenergy. US convention calls for the useof HHV. Trane publishes both HHV forconventional use in performancecalculations and LHV for comparativepurposes.

Commonly Used DefinitionsNatural gas utilities meter gas by thecubic foot or therms. The Btu contentmay vary from 900 to 1,200 Btu/ft3, theusual range at sea level. Utilities mayadd propane-air to liquefied natural gasduring winter peak periods to meetdemand.

Following are some terms andmeasures commonly used:

1 CF (Cubic Foot) =Approx. 1,000 Btu HHV

1 Therm =100,000 Btu�s = 100 CF

100 CF=.1 MCF

1 MCF =1,000 CF = 10 Therms

1 Quad =109 MCF = 1010 Therms =1015 Btu�s


Heating Values DefinedEvery fuel has a characteristic heatingvalue that describes how much heatcan be extracted from it duringcombustion on a heat per volume ormass basis.

Heating value is defined as �theamount of heat produced by thecomplete combustion of a unit quantityof fuel. The higher heating value is thatwhich is obtained when all of theproducts of combustion are cooled tothe temperature existing beforecombustion, the water vapor formedduring combustion is condensed, andall the necessary corrections have beenmade. The lower heating value isobtained by subtracting the latent heatof vaporization of the water vapor fromthe higher heating value.�

When the heating value of a fuel isspecified without designating higher orlower, it generally means the higherheating value in the United States. TheLHV is approximately 90 percent ofHHV.

C.O.P. and Fuel ConsumptionC.O.P. = Coefficient of

Performance= The ratio of useful

output to Energy Input= Tons x 12,000 Btu

Heat Input (MBH)

M.B.H. = 1,000 Btuh

C.O.P. can be defined as the ratio ofunits of energy output of a system tothose put into the system. Care needsto be taken that methods fordetermining C.O.P. for one machine arethe same methods used for another.Notice that both input and outputvalues must be expressed in the sameunits, as C.O.P. is dimensionless.

Using LHV results in a higher C.O.P.because it ignores the purchasedenergy used to vaporize the products ofcombustion. The C.O.P. is artificiallyhigh compared to actual consumption,and thus may be misleading to systemdesigners and owners.

ConclusionC.O.P. can take on different valuesdepending on the reference point beingused. The key to making a faircomparison between machines is thatthe same reference point is used. Ifnot, as shown above, the calculationswill yield a significantly different C.O.P.

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SelectionProcedure

GeneralTotal air conditioning system first costcan be minimized by a careful analysisof system operating parameters. Theeffect of flow rates and temperatureson both the building airside and therefrigeration machine selections shouldbe investigated. This will establish thesystem that represents the bestinvestment for the owner.

The information on the following pagesprovides performance data at ARIstandard conditions for capacity intons, efficiency, flow rates, and waterpressure drops. All capacities arebased on fouling factors of.00025 hr-ft-deg F/Btu for theevaporator and absorber/condenserwaterside tubing. All final selectionsshould be made by the local Tranesales engineer using the Trane Direct-Fired Absorption Selection Program.

Fouling FactorsUnit performance at non-standardfouling factors will vary from standardperformance. Fouling factors estimatethe heat transfer penalty that occurs asthe tubing gets dirty through normalchiller operation. ARI tube foulingstandards are shown below:

Fouling factors @ ARI 560-92

Clean Standard Excessive0.00000 0.00025 0.00075

All selections should have a minimumfouling factor of 0.00025 to bestestimate the chiller performance in anequipment room and to comply withARI 560-1992. Any selection that uses afouling factor above 0.00025 is a moreconservative estimate that should onlybe used if there is an abnormal amountof fouling contamination in the watersystem. The effect of non-standardfouling factors should be determinedby the Trane Direct-Fired AbsorptionSelection Program.

Unit Performance with Fluid MediaOther Than WaterAbsorption chillers can be selectedwith a wide variety of media other thanwater (evaporator and absorber/condenser cooling water circuits).Typical media include ethylene glycolor propylene glycol either in theevaporator, condenser, or both. Formedia other than water, contact theTrane sales office for chiller selectionsand information.

General Data TablesLocated in the general data tables arethe evaporator and absorber/condenser flows, pressure drops andthe number of passes. Also included inthese tables are the weights, roughdimensions and connection sizes.

Part Load PerformanceThe Horizon� direct-fired absorptionchiller exhibits good part loadperformance characteristics. Airconditioning system loads are typicallysignificantly lower than full load designconditions. Therefore, the chilleroperates at full load a small amount ofthe time. Part load chiller operation isnormally associated with reducedtower water temperatures. At part loadoperation, the heat rejected to thecooling tower is less than at full loadoperation, because part load operationis typically associated with reducedoutside wet bulb temperatures,resulting in improved cooling towerperformance. The result of less heatrejection and lower wet bulbtemperature is cooler tower waterentering the chiller and improved unitperformance. To determine specificunit part load performance, use of theHorizon Direct-fired Selection Programis recommended. A minimum of 65 Fentering cooling water to the absorber/condenser can be maintained at allload conditions. Lower enteringcooling water temperatures arepossible at reduced loads.

Electrical DataElectrical data tables provide therequired information for proper sizingof the electrical service to the Horizondirect-fired absorption chiller.

®

83054 ABS-DS-6.p65 3/26/98, 11:47 AM12

13

Model NumberDescription

Product Coding Description

MODL = ABSORPTION UNIT MODELNTON = UNIT NOMINAL TONNAGEVOLT = UNIT VOLTAGEBURN = DIRECT-FIRED BURNER TYPEBOPA = BURNER OPERATING ALTITUDEFTAA = FUEL TRAIN

APPROVALSMHC = SIMULTANEOUS HEATING-

COOLINGENSR = UNIT ENERGY SOURCEENPR = UNIT ENERGY PRESSUREGNCN = LOW TEMPERATURE

GENERATOR WATERBOXCONSTRUCTION

LGTM = LOW TEMPERATUREGENERATOR TUBE MATERIAL

HGTM = HIGH TEMPERATUREGENERATOR TUBE MATERIAL

CDTM = CONDENSER TUBE MATERIALEVTM = EVAPORATOR TUBE MATERIALABTM = ABSORBER TUBE MATERIALGNWA = LOW TEMPERATURE

GENERATOR WATERBOXARRANGEMENT

The component and options of Trane absorption units can be identified by referring to the alphanumeric product coding blocklocated on the service nameplate for the unit. The coding block precisely identifies all characteristics of a unit. An example isgiven:

MODL - ABDANTON - 500VOLT - 460BURN - LNOXBOPA - 1600FTAA - ULSMHC - NSELENSR - DGAS

ENPR - 14WGNCN - NSELLGTM - SB01HGTM - NSELCDTM - ES09EVTM - ES01ABTM - ES01GNWA - NSEL

CAWA - CA01EVWA - EV01CAWC - NSELEVWC - LEBKSPKG - DAUELPP - SELPUPNT - SFPTPPCO - TB

LCLD - CLDCTRIM - TRMIPRIM - YESACWR - YESWVUO - YESOPTM - YESFLSW - 2FS2WBLD - YES

CAWA = CONDENSER AND ABSORBERWATERBOX ARRANGEMENT

EVWA = EVAPORATOR WATERBOXARRANGEMENT

CAWC = CONDENSER AND ABSORBERWATER CONNECTIONS

EVWA = EVAPORATOR WATERBOXARRANGEMENT

SPKG = UNIT SHIPPING PACKAGEELPP = ELECTRICAL PROTECTION

PACKAGEUPNT = UNIT PAINTPPCO = CONTROL PANEL POWER

CONNECTIONLCLD = LOCAL CLEAR LANGUAGE

DISPLAYTRIM = TRACER® INTERFACE

MODULEPRIM = PRINTER INTERFACE

MODULEACWR = AMBIENT CHILLED WATER

RESETWVUO = UNDER-OVER VOLTAGE

PROTECTIONOPTM = OPTIONS MODULEFLSW = FLOW SWITCHWBLD = WATERBOX COVER

LIFTING DEVICE

®

83054 ABS-DS-6.p65 3/26/98, 11:47 AM13

14

Table PD-1 - Performance Data at Trane Design ConditionsCoefficient of Performance Cooling Duty Fuel Consumption Heating Performance - Fuel Consumption

(COP) (MBH) (MBH)Model Capacity HHV LHV HHV LHV Capacity HHV LHV

(tons) (MBH)ABDA-380 397 1.02 1.13 4.56 4.10 3.78 4.56 4.10ABDA-440 460 1.02 1.13 5.28 4.75 4.38 5.28 4.75ABDA-500 524 1.02 1.13 6.00 5.41 4.98 6.00 5.41ABDA-575 602 1.02 1.13 6.90 6.21 5.73 6.90 6.21ABDA-660 692 1.02 1.13 7.95 7.14 6.57 7.92 7.14ABDA-750 785 1.02 1.13 9.00 8.10 7.47 9.00 8.10

Based on Trane Design Conditions3.6 GPM/Ton Condenser Water54-44 Chilled Water, 85-97 Condenser Water, std. fouling factorsHeating Duty, 130-140 F Hot water, std. fouling factors

Table PD-2 - Performance Data at ARI ConditionsCoefficient of Performance Cooling Duty Fuel Consumption Heating Performance - Fuel Consumption

(COP) (MBH) (MBH)Model Capacity HHV LHV HHV LHV Capacity HHV LHV

(tons) (MBH)ABDA-380 401 1.03 1.14 4.56 4.10 3.78 4.56 4.10ABDA-440 464 1.03 1.14 5.28 4.75 4.38 5.28 4.75ABDA-500 528 1.03 1.14 4.00 6.00 4.98 6.00 5.41ABDA-575 607 1.03 1.14 6.90 6.90 5.73 6.90 6.21ABDA-660 698 1.03 1.14 7.92 7.92 6.57 7.92 7.14ABDA-750 792 1.03 1.14 9.00 9.00 7.47 9.00 8.10

Based on ARI Design Conditions4.5 GPM/Ton Condenser Water54-44 Chilled Water, 85-95 Condenser Water, std. fouling factorsHeating Duty, 130-140 F Hot water, std. fouling factors

Table PD-3 - Selection Data Water Flow Rate at Trane Design ConditionsWater Flow

Chilled Water Hot Water Cond/Abs.*Model Flow Rate Pr. Drop # of Flow Rate Pr. Drop # of Flow Rate Pr. Drop # of

(GPM) (Feet H20) Passes (GPM) (Feet H20) Passes (GPM) (Feet H20) PassesABDA-380 937 15.0 2 500 12.4 2 1429 27.6 2ABDA-440 1085 15.5 2 500 13.3 2 1656 30.5 2ABDA-500 1236 16.1 2 500 14.0 2 1886 33.8 2ABDA-575 1421 31.6 2 700 21.7 2 2167 25.9 2ABDA-660 1633 32.3 2 700 23.3 2 2491 28.6 2ABDA-750 1853 33.8 2 700 25.0 2 2826 32.5 2

Based on Trane Design Conditions3.6 GPM/Ton Condenser Water54-44 Chilled Water, 85-97 Condenser Water, std. fouling factorsHeating Duty 130-140 F Hot water, std. fouling factors*ABDA 380-500 ton units have 2 pass absorber and single pass condenser; ABDA 575-750 have 2 pass absorber and 2 pass condenser

(English)PerformanceData

®

83054 ABS-DS-6.p65 3/26/98, 11:47 AM14

15

Table PD-4 - Selection Data - Water Flow Rate at ARI Design ConditionsWater Flow


(GPM) (Feet H20) Passes (GPM) (Feet H20) Passes (GPM) (Feet H20) PassesABDA-380 937 15.0 2 500 12.4 2 18.4 41.7 2ABDA-440 1085 15.5 2 500 13.3 2 2088 46.2 2ABDA-500 1236 16.1 2 500 14.0 2 2376 51.5 2ABDA-575 1421 31.6 2 700 21.7 2 2731 39.2 2ABDA-660 1633 32.3 2 700 23.3 2 3141 43.5 2ABDA-750 1853 33.8 2 700 25.0 2 3564 49.5 2Based on ARI Design Conditions4.5 GPM/Ton Condenser Water54-44 Chilled Water, 85-95 Condenser Water, std. fouling factorsHeating Duty, 130-140 F Hot water, std. fouling factors*ABDA 380-500 ton units have 2 pass absorber and single pass condenser; ABDA 575-750 have 2 pass absorber and 2 pass condenser

PerformanceData

(English)

Table PD-5 - Selection Data - Air Flow and Flow Rate LimitationsAir Flow Flow Rate Limitations

Model Combustion Air Exhaust Air Evaporator Condenser/Absorber(CFM) (CFM) Min Max Min Max

(GPM) (GPM) (GPM) (GPM)ABDA-380 905 1445 500 1900 600 2000ABDA-440 1045 1675 600 2200 700 2200ABDA-500 1190 1900 700 2500 800 2600ABDA-575 1365 2185 600 2300 800 3000ABDA-660 1570 2510 700 2600 900 3400ABDA-750 1785 2850 800 3000 1000 3700

Table PD-6 - Electrical Data - ABDA 380-750, 60 Cycle, 3 phaseUnit Size Volts FLA Total Motor Total Motor Control MCA Max. Fuse Size

HP KW CKT AmpsABDA-380 208 72.7 18.3 13.9 10 88 100

230 67.6 18.3 13.9 8.7 81 100460 33.8 18.3 13.9 4.4 40 45575 27.6 18.3 13.9 3.5 33 40

ABDA-440 208 72.7 18.3 13.9 10 88 100230 67.6 18.3 13.9 8.4 81 100460 33.8 18.3 13.9 4.4 40 45575 27.6 18.3 13.9 3.5 33 40

ABDA-500 208 86.9 22.7 17.0 10 102 125230 80.4 22.7 17.0 8.7 94 125460 40.2 22.7 17.0 4.4 47 60575 32.7 22.7 17.0 3.5 38 50

ABDA-575 208 130.0 30.9 23.1 10 149 175230 116.0 30.9 23.1 8.7 132 150460 58.0 30.9 23.1 4.4 66 80575 47.0 30.9 23.1 3.5 54 60

ABDA-660 208 130.0 30.9 23.1 10 149 175230 116.0 30.9 23.1 8.7 132 150460 58.0 30.9 23.1 4.4 66 80575 47.0 30.9 23.1 3.5 54 60

ABDA-750 208 130.0 30.9 23.1 10 149 175230 116.0 30.9 23.1 8.7 132 150460 58.0 30.9 23.1 4.4 66 80575 47.0 30.9 23.1 3.5 54 60

83054 ABS-DS-6.p65 3/26/98, 11:47 AM15

16

Table PD-7 - Performance Data at Trane Design ConditionsCoefficient of Performance Cooling Duty Fuel Consumption Heating Performance - Fuel Consumption

(COP) (kCal/hr) (kCal/hr)Model Capacity HHV LHV HHV LHV Capacity HHV LHV

(KW) (KW)ABDA-380 1396 1.02 1.13 1,149,120 1,033,200 1107 1,149,120 1,033,200ABDA-440 1617 1.02 1.13 1,330,560 1,197,000 1283 1,330,560 1,197,000ABDA-500 1842 1.02 1.13 1,512,000 1,363,320 1459 1,512,000 1,363,320ABDA-575 2117 1.02 1.13 1,738,800 1,564,920 1670 1,738,800 1,564,920ABDA-660 2433 1.02 1.13 1,995,840 1,799,280 1924 1,995,840 1,799,280ABDA-750 2760 1.02 1.13 2,268,000 2,041,200 2189 2,268,000 2,041,200

Based on Trane Design Conditions3.6 GPM/Ton Condenser Water12.2-6.7 Chilled Water, 29.4-36.5 Condenser Water, std. fouling factorsHeating Duty 54.4-60.0 Hot Water, std. fouling factors

PerformanceData

(SI)

Table PD-8 - Performance Data at ARI ConditionsCoefficient of Performance Cooling Duty Fuel Consumption Heating Performance - Fuel Consumption

(COP) (kCal/hr) (kCal/hr)Model Capacity HHV LHV HHV LHV Capacity HHV LHV

(KW) (KW)ABDA-380 1410 1.03 1.14 1,149,120 1,033,200 1107 1,149,120 1,033,200ABDA-440 1631 1.03 1.14 1,330,560 1,197,000 1283 1,330,560 1,197,000ABDA-500 1856 1.03 1.14 1,512,000 1,363,320 1459 1,512,000 1,363,320ABDA-575 2134 1.03 1.14 1,738,800 1,564,920 1670 1,738,800 1,564,920ABDA-660 2454 1.03 1.14 1,995,840 1,799,280 1924 1,995,840 1,799,280ABDA-750 2785 1.03 1.14 2,268,000 2,041,200 2189 2,268,000 2,041,200

Based on ARI Design Conditions4.5 GPM/ton Condenser Water12.2-6.7 Chilled Water, 29.4-35.0 Condenser Water, std. fouling factorsHeating Duty, 54.4-60.0 C Hot Water, std. fouling factor

Table PD-9 - Selection Data Water Flow Rate at Trane Design ConditionsWater Flow


(m3/hr) (m H20) Passes (m3/hr) (m H20) Passes (m3/hr) (m H20) PassesABDA-380 213 4.58 2 113.6 3.78 2 325 8.41 2ABDA-440 246 4.72 2 113.6 4.05 2 376 9.30 2ABDA-500 281 4.91 2 113.6 4.27 2 428 10.30 2ABDA-575 323 9.63 2 159.0 6.61 2 492 7.89 2ABDA-660 371 9.85 2 159.0 7.10 2 566 8.72 2ABDA-750 421 10.30 2 159.0 7.62 2 642 9.91 2

Based on Trane Design Conditions3.6 GPM/Ton Condenser Water12.2-6.7 Chilled Water, 29.4-36.5 Condenser Water, std. fouling factorsHeating Duty, 54.4-60.0 C Hot Water, std. fouling factors*ABDA 380-500 ton units have 2 pass absorber and single pass condenser; ABDA 575-750 have 2 pass absorber and 2 pass condenser

83054 ABS-DS-6.p65 3/26/98, 11:47 AM16

17

PerformanceData

(SI)

Table PD-11 - Selection Data - Air Flow and Flow Rate Limitations@Flow Rate Limitations

Model Combustion Air Exhaust Air Evaporator Condenser/Absorber(m3/hr) (m3/hr) Min Max Min Max

(m3/hr) (m3/hr) (m3/hr) (m3/hr)ABDA-380 1537 2455 114 431 136 454ABDA-440 1775 2846 136 499 159 522ABDA-500 2022 3228 159 568 182 590ABDA-575 2319 3712 136 522 182 681ABDA-660 2667 4264 159 590 204 772ABDA-750 3032 4842 182 681 227 840

Table PD-10 - Selection Data - Water Flow Rate at ARI Design ConditionsWater Flow

Chilled Water Hot Water Cond/Abs.*Model Flow Rate Pr. Drop) # of Flow Rate Pr. Drop) # of Flow Rate Pr. Drop # of

(m3/hr) (m H20) Passes (m3/hr) (m H20) Passes (m3/hr) (m H20) PassesABDA-380 213 4.58 2 113.6 3.78 2 409 12.71 2ABDA-440 246 4.72 2 113.6 4.05 2 474 14.08 2ABDA-500 281 4.91 2 113.6 4.27 2 540 15.70 2ABDA-575 323 9.63 2 159.0 6.61 2 620 11.95 2ABDA-660 371 9.852 2 159.0 7.10 2 713 13.23 2ABDA-750 421 10.30 2 159.0 7.62 2 809 15.09 2

Based on ARI Design Conditions4.5 GPM/Ton Condenser Water12.2-6.7 Chilled Water, 29.4-35.0 Condenser Water, std. fouling factorsHeating Duty, 54.4-60.0 C Hot Water, std. fouling factors*ABDA 380-500 ton units have 2 pass absorber and single pass condenser; ABDA 575-750 have 2 pass absorber and 2 pass condenser

Table PD-12 - Electrical Data - ABDA 380-750, 50 Cycle, 3 phaseUnit Size Volts FLA Total Motor Total Motor Control MCA Max. Fuse Size

HP KW CKT AmpsABDA-380 190 67.9 17.4 13.2 10.5 84 100

220 59.1 17.4 13.2 9.1 72 90380 34.2 17.4 13.2 5.3 42 50405 31.4 17.4 13.2 4.8 39 45

ABDA-440 190 67.9 17.4 13.2 10.5 84 100220 59.1 17.4 13.2 9.1 72 90380 34.2 17.4 13.2 5.3 42 50405 31.4 17.4 13.2 4.8 39 45

ABDA-500 190 76.6 20.0 15.1 10.5 92 110220 65.8 20.0 15.1 9.1 79 100380 38.0 20.0 15.1 5.3 46 60405 34.8 20.0 15.1 4.8 42 50

ABDA-575 190 108.1 27.9 20.8 10.5 126 150220 82.5 27.9 20.8 9.1 108 125380 65.0 27.9 20.8 5.3 63 70405 49.6 27.9 20.8 4.8 58 70

ABDA-660 190 108.1 27.9 20.8 10.5 126 150220 82.5 27.9 20.8 9.1 108 125380 54.0 27.9 20.8 5.3 63 70405 49.6 27.9 20.8 4.7 58 70

ABDA-750 190 108.1 27.9 20.8 10.5 126 150220 92.5 27.9 20.8 9.1 108 125380 54.0 27.9 20.8 5.3 63 70405 49.6 27.9 20.8 4.8 58 70

83054 ABS-DS-6.p65 3/26/98, 11:47 AM17

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PerformanceData

Figure PD-1 - Percent Energy Input vs. Percent Capacity at Nominal Conditions

Ener

gy In

put (

%)

Notes:Cooling Water Supply Temperature = 85FCooling Water Flow Rate = 3.6 gpm/ton

Chilled Water Supply Temperature = 44FChilled Water Flow Rate = 2.4 gpm/ton

Capacity (%)

Figure PD-3 - ABDA Part Load Performance - Energy Input vs. Capacity at Various Cooling Water Supply Temperatures -Chilled Water Supply Temperature = 44 F

110.00

60.00

50.0040.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00 50.00

70.00

80.00

90.00

100.00

Cap

acit

y (%

)

Chilled Water Supply Temperature (°F

Notes:Cooling Water Supply Temperature = 85FCooling Water Flow Rate = 3.6 gpm/ton

Chilled Water Supply Temperature = 44FChilled Water Flow Rate = 2.4 gpm/ton

Figure PD-2 - ABDA Maximum Capacity - Maximum Allowable Capacity Vs. Chilled Water Supply Temperature atVarious Cooling Water Supply Temperatures

Cap

acit

y (%

)

Energy Input (%)

65

75

85

95

83054 ABS-DS-6.p65 3/26/98, 11:47 AM18

19

Figure PD-4 - Pressure Drop vs. Flow Rate ABDA-380

PerformanceData



Pres

sure

Dro

p (f

t of

wat

er)

Flow Rate (gpm)

Pres

sure

Dro

p (f

t of

wat

er)

Flow Rate (gpm)

Flow Rate (gpm)

Pres

sure

Dro

p (f

t of

wat

er)

83054 ABS-DS-6.p65 3/26/98, 11:47 AM19

20


PerformanceData



Pres

sure

Dro

p (f

t of

wat

er)

Flow Rate (gpm)

Flow Rate (gpm)

Pres

sure

Dro

p (f

t of

wat

er)

Pres

sure

Dro

p (f

t of

wat

er)

Flow Rate (gpm)

83054 ABS-DS-6.p65 3/26/98, 11:47 AM20

21

Jobsite/MechanicalConnections

Table J-1 � Machine Dimensions (English)Unit Size ABDA 380-440-500

A 3/8�B 9�-6 7/8�C 7�-9 5/8�D 5�-4 1/8�E 1�-8�F 3�-1�G 7�-5 3/4�H 2�-2�J 8�-6 3/8�K 1�-1 3/4�L 4�-9�M 11 1/4�N 2 3/4�O 2�-8 1/4�P 5�-4 1/8�Q 9�-5 7/8�R 3�-4 1/2�S 10�-1 3/4�T 7� approxU 1�-8�V 3�-1�W 3�-2�

CUSTOMER NOTES:1. FRONT OF UNIT IS DETERMINED BY FACING UNIT CONTROL PANEL.2. ALL VERTICAL DIMENSIONS INCLUDE 5/16� THICK ISOLATION PADS.3. DIMENSIONS SHOWN ARE CALCULATED VALUES. STACK TOLERANCE COULD BE +/- 1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR, CONDENSER, AND ABSORBER WATER CONNECTIONS ARE FOR 8� PIPE. AVAILABLE WITH 150# GROOVED

CONNECTION FOR USE WITH STYLE 77 VICTAULIC COUPLING. ALSO, AVAILABLE WITH 150# AMERICAN STANDARD RAISED FACEFLANGE. (FLANGED BOLT HOLES STRADDLE VERTICAL CENTERLINE).

5. ALL WATER VOX VENTS ARE 1/4� NPT AND DRAINS ARE 3/4� NPT.6. FLEXIBLE CONNECTION MUST BE USED FOR ATTACHMENT TO RUPTURE DISC. DO NOT APPLY MORE THAN 12 PSI INTERNAL

PRESSURE ON MACHINE WITHOUT REMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THE OUTSIDE TO MEETLOCAL CODE.

7. GAS TRAIN SHIPS ASSEMBLED TO UNIT. GAS SUPPLY CONNECTION SIZE AND LOCATION WILL VARY PER LOCAL CODES AND GASINLET PRESSURE.

8. FIELD PIPING MUST BE ARRANGED AND SUPPORTED TO AVOID STRESS ON THE EQUIPMENT. IT IS STRONGLY RECOMMENDEDTHAT THE PIPING CONTRACTOR REFRAIN FROM PRE-PIPING CLOSER THAN 36� TO THE EQUIPMENT. THIS WILL ALLOW FOR PROPERCONNECTION UPON ARRIVAL OF THE UNIT AT THE JOBSITE. NECESSARY ADJUSTMENTS CAN BE MADE AT THAT TIME.

Table J-2 � Machine Dimensions (SI) -mmUnit Size ABDA 380-440-500

A 9.525B 2917.8C 2378.1D 1628.8E 508F 939.8G 2279.7H 660.4J 2600.3K 349.3L 1143.0M 285.8N 69.85O 819.2P 1628.8Q 2892.4R 1028.7S 3092.5T 177.8 approxU 508V 939.8W 965.2

®

Figure J-1 � Right End Elevation - ABDA 380, 440, 500 Figure J-2 � Left End Elevation - ABDA 380, 440, 500

Condenser Tower WaterOutlet R.H. Conn

Baseline

Evaporator Chilled WaterInlet & Outlet - Conn�s AvailableL.H. or R.H. with Inlet Front or Back

Rupture Disc

Flue GasOutlet Conn

OA

B

C

D

Baseline

E

F

Gas SupplyConn

ServiceManway

7�Approx. N

DirectFired

Generator

GenCond

Evap.

ABS

Baseline(Corner or Base)

Unit Control Panel

Absorber Tower WaterInlet L.H. Conn

M

L

K

JH

G

83054 ABS-DS-6.p65 3/26/98, 11:47 AM21

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Jobsite/MechanicalConnections

Table J-3 � Machine Dimensions (English)Unit Size ABDA 575-660-750

A 1/2�B 9�-6 7/8�C 7�-11 5/8�D 5�-4 1/8�E 1�-8�F 3�-1�G 7�-5 3/4�H 2�-2�J 8�-6 3/8�K 1�-1 3/4�L 4�-9�M 11 1/4�N 2 3/4�O 2�-6 7/8�P 5�-4 1/8�Q 9�-5 7/8�R 3�-4 1/2�S 10�-1 3/4�T 7� approxU 1�-8�V 3�-1�W 3�-2�

Table J-4 � Machine Dimensions (SI) -mmUnit Size ABDA 575-660-750

A 12.7B 2917.8C 2428.9D 1628.8E 508F 939.8G 2279.7H 660.4J 2600.3K 349.3L 1143.0M 285.8N 69.85O 784.2P 1628.8Q 2892.4R 1028.7S 3092.5T 177.8 approxU 508V 939.8W 965.2

CUSTOMER NOTES:1. FRONT OF UNIT IS DETERMINED BY FACING UNIT CONTROL PANEL.2. ALL VERTICAL DIMENSIONS INCLUDE 5/16� THICK ISOLATION PADS.3. DIMENSIONS SHOWN ARE CALCULATED VALUES. STACK TOLERANCE COULD BE +/- 1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR WATER CONNECTIONS ARE FOR 8� PIPE. CONDENSER, AND ABSORBER WATER CONNECTIONS ARE FOR 10� PIPE.

AVAILABLE WITH 150# GROOVED CONNECTION FOR USE WITH STYLE 77 VICTAULIC COUPLING. ALSO, AVAILABLE WITH 150#AMERICAN STANDARD RAISED FACE FLANGE. (FLANGED BOLT HOLES STRADDLE VERTICAL CENTERLINE).

5. ALL WATER VOX VENTS ARE 1/4� NPT AND DRAINS ARE 3/4� NPT.6. FLEXIBLE CONNECTION MUST BE USED FOR ATTACHMENT TO RUPTURE DISC. DO NOT APPLY MORE THAN 12 PSI INTERNAL

PRESSURE ON MACHINE WITHOUT REMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THE OUTSIDE TO MEETLOCAL CODE.

7. GAS TRAIN SHIPS ASSEMBLED TO UNIT. GAS SUPPLY CONNECTION SIZE AND LOCATION WILL VARY PER LOCAL CODES AND GASINLET PRESSURE.

8. FIELD PIPING MUST BE ARRANGED AND SUPPORTED TO AVOID STRESS ON THE EQUIPMENT. IT IS STRONGLY RECOMMENDEDTHAT THE PIPING CONTRACTOR REFRAIN FROM PRE-PIPING CLOSER THAN 36� MINIMUM TO THE EQUIPMENT. THIS WILL ALLOWFOR PROPER CONNECTION UPON ARRIVAL OF THE UNIT AT THE JOBSITE. NECESSARY ADJUSTMENTS CAN BE MADE AT THATTIME.

Figure J-3 � Left End Elevation - ABDA 575, 660, 750

Tower Water OutletL.H. ConnSee Note 4

Evaporator Chilled WaterInlet & Outlet Conn�s AvailableSee Note 4

Rupture Disc2� NPT

ServiceManway

Gas SupplyConn

DirectFired

Generator

GenCond

Evap

ABS

J

T S

R Unit Control Panel

Tower Water InletL.H. ConnSee Note 4

W

K L

V

U

N

Baseline(Corner of Base)

O

P

C

Q

A

Baseline

Figure J-4 � Right End Elevation - ABDA 575, 660, 750

Evaporator Chilled WaterInlet & Outlet Conn�s AvailableL.H. or R.H. with Inlet Front or BackSee Note 4

Flue GasOutlet Conn

1/2 NPTStack

Drain Conn(2 Places)

Gas SupplyConn

HG

Baseline

F

E

B

D

83054 ABS-DS-6.p65 3/26/98, 11:47 AM22

23

Controls

Trane set the standard for unitmicroprocessor controls in 1985 withthe first generation of UCP. Associatedwith this standard have been:

� Proportional integral derivative (PID)control strategies which provide stableoperation and high accuracy for betterperformance along with feed forwardplus.

� Adaptive Control� to keep the chiller online and at the same time keep thechiller 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.

Now� in addition to all of thecapability that our customer have cometo expect � Trane offers UCP2.Beyond the �traditional� systems,UCP2 adds more flexibility, morereliability and better systemperformance than even our mostdemanding customers expect.

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

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. Tranerecommends the use of C.D.S. NetworkEquipment Economics, The TraneApplications Manuals, and consultationwith a Trane sales engineer for help inthese analyses.

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

How does Trane demonstrate thisflexibility:

� The modular structure of the UCP2makes it possible for the designer toselect the system controls andassociated interfaces to Tracer® (orother building automation systems)that are required for chiller plantdesign. With this modular concept,capability can be added or upgraded atany time � with only temporaryinterruption of chilled waterproduction.

� 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, serviceperson, andsystem designer can customize the useof the microcontroller to uniqueconditions of the chiller plant �whether the purpose of chilled water isfor comfort cooling or for processcooling.

� All data that is necessary for the safeoperation and easy serviceability of thechiller is provided as standard on allHorizon� absorption chillers. Optionsare available that provide the 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.

Reliability...What does this mean andhow do we do it?To most people, reliability means,�dependability - giving the same resulton successive trials.� However to ourcustomer it has come to mean,�keeping chilled water flowing.� Inother words, �when I turn the switchon� cold water comes out,� In orderto do this, the microcontroller must beaware of what is happening in thesystem. But more importantly, it mustbe able to make decisions andadjustments to keep the chiller runningas long as possible, even when non-standard conditions exist. This can beconditions such as bad power or badwater (flow, temperature, fouling) orsystem component failure. Also theTrane UPC2 panel continuouslymonitors for noncondensables andpurges automatically.

With Enhanced Adaptive Control� thecontroller does everything it can toavoid taking the chiller off line.

Panel FeaturesThe absorption chiller unit controlpanel (UCP2) incorporates thefollowing features and components:

� Senses the potential overload, freezeand condenser overpressureconditions

� Displays a warning message about thepotential condition/safety trip

� Takes the following corrective actionsequentially as the conditions worsens:- 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 PerformanceThe term �Chilled Water System�encompasses many levels of control:standalone chiller, chiller plant, appliedsystem, central building automationsystem. However, regardless of thesystem level being designed, the unitcontrols become critical not just inmaking every level operate reliably butin facilitating optimal performance.UCP2 provides more capability andmore intelligence to make thisoperation/optimization possible.

Panel CapabilitiesThe absorption chiller unit controlpanel (UCP2) incorporates thefollowing features and components:

Control Functions� Smart dilution cycle duration based on

system requirements� Adaptive evaporator leaving fluid

temperature control� Low evaporator temperature limit� High interstage pressure limit� Solution flow control via AFD� Softloading� Nuisance trip prevention via Adaptive

Control� Chilled water reset� Optimum concentration control� Crystallization prevention via SDR

®

83054 ABS-DS-6.p65 3/26/98, 11:47 AM23

24

Controls

Safeties� Smart shutdown� Condenser/absorber loss of flow� Low condenser/absorber water

temperature� High interstage pressure limit� High pressure cutout� Evaporator leaving fluid temperature

cutout� Motor current overload� High motor winding temperature� Phase loss, reverse rotation� Over/under voltage (optional)� Purge� High solution temperature� High flue gas limit and cutout� Sensor failure detection

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

Custom ReportUser defined custom report (theoperator may choose up to 20 points -from a list of over 100 choices).

Chiller ReportStatus, fluid temperatures, andsetpoints:

� Operating mode (i.e. run status)� Heating and cooling priority (optional)� Chilled water setpoint� Hot water reset (optional)� Evaporator entering/leaving water

temperatures� Hot water entering/leaving

temperatures (optional)� Absorber entering/leaving water

temperatures� Condenser leaving water temperature� Outdoor air temperature� Evaporator leaving water temperature� Chilled water reset

Cycle ReportRefrigerant temperatures andpressures:

� Solution temperature leaving hightemperature generator

� Interstage vapor temperature� Solution temperature entering level

control� Mixed solution temperature entering

low temperature heat exchanger� Solution temperature entering high

temperature generator� Interstage vapor pressure� High temperature generator leaving

concentration� High temperature generator cutout and

monitor temperature� Flue gas exhaust temperature� Crystallization detection temperature� Crystallization trip temperature� Solution temperature leaving low

temperature generator� Saturated condenser refrigerant

temperature� Absorber entering concentration� LiBr crystallization margin� Solution temperature leaving absorber� Solution temperature entering low

temperature generator� Saturated evaporator refrigerant

temperature� Evaporator leaving water temperature� Evaporator entering water temperature� Absorber entering water temperature� Absorber leaving water temperature� Condenser leaving water temperature� Solution pump auto/manual speed

command� Energy input auto/manual/slaved

reported command

Pump/Purge Report� Solution Pump

- Starts and hours counters- Motor phase voltages (optional)

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

DiagnosticsThe absorption chiller unit controlpanel (UCP2) provides over 70 activeand historic diagnostics such as:

� Water and refrigerant/solutiontemperatures out of range

� Solution pressures out of range� Loss of system water flows� Sensor and switch faults� Overload trips� Over/under voltage (optional)� Power supply, phase loss and phase

rotation� Crystallization recovery� High pressure cutout� High temperature cutout� Emergency stop� Loss of communication to other

modules� Motor abnormal

Burner Controls� Firing rate mode selection, auto/manual

via UCP2� Manual firing rate via UCP2� Remote/manual fuel transfer via UCP2� Call for operation indication� Local/remote burner alarm indication� Gas pressure normal indication� Fuel �on� indication� Ignition �on� indication� Agency listed flame safeguard system� Emergency �off� switch� Audible alarm, with silencer switch

Operator InterfaceThe Trane Horizon� direct-firedabsorption chiller control panel, UCP2,is easy to use, understand, accessinformation, read, change setpoints,diagnose problems, maintain, and toreset after shutdown.

ConvenienceEnunciation of all information is at thefront panel display including power,voltage, amps, purge, pressures, andnumber of starts data. Messagesdisplayed using clear language.

83054 ABS-DS-6.p65 3/26/98, 11:47 AM24

25

Controls

Readability� Two line, 40 character display that is

easy to read from within a 60 degreeangle.

� LCD backlight so that the display can beread in a variety of equipment roomlighting.

Remote Operator InterfaceWith the addition of an optional remoteinterface panel, up to four chillers withUCP2 can be monitored and controlled.All data is available at each chiller�slocal operator interface is available tothe Remote Operator Interface via asingle twisted pair.

Ease of Use� 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

Application Flexibility� Seven languages available� Metric (SI) units available� Complex character human interface

available.

Trane ICS CompatibilityThe Trane absorption chiller controlpanel, UCP2, is 100 percent compatiblewith Trane Integrated Comfort�

systems (ICS). UCP2 easily integratesinto the Tracer® family of flexible chillerplant system controllers with a singletwisted-wire pair communicationscable.

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

83054 ABS-DS-6.p65 3/26/98, 11:47 AM25

26

ElectricalData

®

Required Chilled Water Flow Switch

Required Condenser-Absorber Water Flow Switch Line Voltage(See Unit Nameplate)

RequiredChilled Water

PumpEvaporator

In(RH or LH)

Tower WaterInlet

RequiredCondenser-Absorber

Water Pump

115 Vac 15A Provided by Customer

Low Voltage (30 VDC Maximum)

FRONT ELEVATION

MainUnit

ControlPanel

OptionalExternal Auto Stop Switch

With Auto Reset After Closure

OptionalEmergency Stop Switch

Requires Manual Reset After Reclosure

OptionalOutdoor Air Temperature Sensor

For Ambient-Based Chilled Water Reset(Furnished by Trane - Field Installed)

OptionalEnergy Valve

Monitor Output; 2-10 VDC(Requires Options Module)

OptionalTracer Temperature SensorOrdered with Tracer Panel(Requires Options Module)

OptionalEvaporator External Chilled Water

Setpoint Input; 2-10 VDC or 4-20 MA(Requires Options Module)

OptionalBi-Directional Communication Link

To Tracer Panel, If Present(Requires Tracer Communication Module)

OptionalBi-Directional Communication Link To

Additional UCP2 Control Panel(s).If Present

(Requires Tracer Communication Module)

OptionalBi-Directional Communication LinkTo Remote Clear Language Display

Panel, If Present(Requires IPC Buffer Module)

OptionalCommunication Link to Printer,

If Present9-Pin Sub-D RS-232 Connector

(Requires Printer Module)

RequiredChilled Water Flow Switch

RequiredCondenser-Absorber Water Flow Switch

RequiredCondenser-Absorber Water Pump Relay

RecommendedChilled Water Pump Relay

OptionalHot Water Pump

OptionalSolution Pump Running

OptionalMachine Manual Reset

Alarm Status Relay

OptionalMachine Automatic Reset

Alarm Status Relay

OptionalLimit Warning Status Relay

OptionalPurge Pumpout Running

Status Indicator Light

OptionalPurge Alarm Indicator Light

OptionalInterstage Pressure Relief

Request Status Relay(Requires Options Module)

OptionalMaximum Capacity Status Relay

(Requires Options Module)

OptionalTracer Controlled Relay


OptionalTower Temperature Low Relay


11

10

13

13

13

13

13

13

13

14

6 8

6 8

4 12

7 8

4 12

4 12

7 8

4 12

124

4

4 12

12

124

4

124

124

124

124

6

65

3

3

▲▲▲▲▲CAUTIONUSE COPPER CONDUCTORS ONLY!

UNIT TERMINALS ARE NOT DESIGNED TOACCEPT OTHER TYPES OF CONDUCTORS.

FAILURE TO DO SO MAY CAUSE DAMAGETO THE EQUIPMENT.

!▲▲▲▲▲WARNINGHAZARDOUS VOLTAGE!

DISCONNECT ALL ELECTRIC POWERINCLUDING REMOTE DISCONNECTSBEFORE SERVICING.

FAILURE TO DISCONNECT POWERBEFORE SERVICING CAN CAUSESEVERAL PERSONAL INJURY ORDEATH.

! ▲▲▲▲▲AVERTISSEMENTVOLTAGE HASARDEUX!

DECONNECTEZ TOUTES LES SOURCESELECTIRQUES INCLUANT LESDISJONCTEURS SITUES A DISTANCEAVANT D�EFFECTUER L�ENTRETIEN.

FAUTE DE DECONNECTER LA SOURCEELECTRIQUE AVANT D�EFFECTUERL�ENTRETIEN PEUT ENTRAINER DESBLESSURES CORPORELLES SEVERES OULA WORT.

!

83054 ABS-DS-6.p65 3/26/98, 11:48 AM26

27

Weights andDimensions

Figure WD-1 � Left Hand Elevation - ABDA 380, 440, 500

®

Figure WD-4 � Direct Fired Generator - ABDA 380, 440, 500

BurnerControlPanel

Burner

DirectFiredGen

LL

Gas Supply ConnSee Note 7Baseline

380 Ton = 7�-7 1/2�440 Ton = 6�-10 1/2�500 Ton = 6�-1 1/2� Approx

Figure WD-2 � Right Hand Elevation - ABDA 380, 440, 500

Baseline

Tower Water OutletR.H. ConnSee Note 4

Evaporator Chilled WaterInlet & Outlet Conn AvailableL.H. or R.H., with Inlet Front or BackSee Note 4

Flue GasOutlet Conn

1/2 NPTStack


Gas SupplyConn

Baseline

A

B

C

D

E

F

G H

Evaporator Chilled WaterInlet & Outlet Conn AvailableL.H. or R.H., with Inlet Front or BackSee Note 4

TApprox

SBaseline

R

Unit Control Panel

Tower Water InletL.H. ConnSee Note 4Rupture Disc

2� NPT

Gen Cond

Evap

ABS

DirectFired

GeneratorServiceManway

Gas SupplyConn

J

W

K LV

U

M

Baseline

O

P

Q

N

Figure WD-3 � Front Elevation - ABDA 380, 440, 500

Rupture DiscKKElectrical Service Inlet

BaselineJJ

Generator/Condenser

Evaporator/Absorber

UnitControlPanel

HH

GG

FF

EE


DD

CC

BBAA

MM

1 5/8 � Anchoring Holes

Burner

83054 ABS-DS-6.p65 3/26/98, 11:48 AM27

28

Table WD-1 � Unit Dimensions - EnglishFigure Reference ABDA 380-440-500

A 3/8�B 9�-6 7/8�C 7�-9 5/8�D 5�-4 1/8�E 1�-8�F 3�-1�G 7�-5 3/4�H 2�-2�J 8�-6 3/8�K 1�-1 3/4�L 4�-9�M 11 1/4�N 2 3/4�O 2�-8 1/4�P 5�-4 1/8�Q 9�-5 7/8�R 3�-4 1/2�S 10�-1 3/4�T 7� approxU 1�-8�V 3�-1�W 3�-2�AA 21�-2 1/4�BB 17�-11 1/2�CC 1�-1 5/8�DD 4�-6�EE 1�-7 3/8�FF 5 1/4�GG 3�-7 1/8�HH 3�-6�JJ 11 1/4�KK 17�-10 1/4�LL 7�-1 3/8�

MM 1�-7 3/8�

CUSTOMER NOTES:1. FRONT OF UNIT IS DETERMINED BY FACING UNIT CONTROL PANEL2. ALL VERTICAL DIMENSIONS INCLUDE 5/16� THICK ISOLATION PADS.3. DIMENSIONS SHOWN ARE CALCULATED VALUES. STACK TOLERANCE COULD BE +/-

1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR, CONDENSER AND ABSORBER WATER CONNECTIONS ARE FOR 8� PIPE.

AVAILABLE WITH 150# AMERICAN STANDARD RAISED FACE FLANGE. (FLANGED BOLTHOLES STRADDLE VERTICAL CENTERLINE).

5. ALL WATER BOX VENTS ARE 1/4� NPT AND DRAINS ARE 3/4� NPT.6. FLEXIBLE CONNECTION MUST BE USED FOR ATTACHMENT TO RUPTURE DISC. DO

NOT APPLY MORE THAN 12 PSI INTERNAL PRESSURE ON MACHINE WITHOUTREMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THE OUTSIDETO MEET LOCAL CODE.

7. GAS TRAIN SHIPS ASSEMBLED TO UNIT. GAS SUPPLY CONNECTION SIZE ANDLOCATION WILL VARY PER LOCAL CODES AND GAS INLET PRESSURE.

8. FIELD PIPING MUST BE ARRANGED AND SUPPORTED TO AVOID STRESS ON THEEQUIPMENT. IT IS STRONGLY RECOMMENDED THAT THE PIPING CONTRACTORREFRAIN FROM PRE-PIPING CLOSER THAN 36� MINIMUM TO THE EQUIPMENT. THISWILL ALLOW FOR PROPER CONNECTION UPON ARRIVAL OF THE UNIT AT THEJOBSITE. NECESSARY ADJUSTMENTS CAN BE MADE AT THAT TIME.


Table WD-2 � Unit Dimensions - (SI) - mmFigure Reference ABDA 380-440-500

A 9.525B 2917.8C 2378.1D 1628.8E 508.0F 939.8G 2279.7H 660.4J 2600.3K 349.3L 1447.8M 285.8N 69.9O 819.2P 1628.8Q 2892.4R 1028.7S 3092.5T 177.8 approxU 508.0V 939.8W 965.2AA 6457.9BB 5473.7CC 346.1DD 1371.6EE 492.1FF 133.4GG 1095.4HH 1066.8JJ 285.8KK 5441.9LL 2168.5

MM 492.1


1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR, CONDENSER AND ABSORBER WATER CONNECTIONS ARE FOR 8� PIPE.

AVAILABLE WITH 150# AMERICAN STANDARD RAISED FACE FLANGE. (FLANGED BOLTHOLES STRADDLE VERTICAL CENTERLINE).


NOT APPLY MORE THAN 12 PSI INTERNAL PRESSURE ON MACHINE WITHOUTREMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THE OUTSIDETO MEET LOCAL CODE.



83054 ABS-DS-6.p65 3/26/98, 11:48 AM28

29


Figure WD-6 � Right End Elevation - ABDA 575, 660, 750

Evaporator Chilled WaterInlet & Outlet Conn�s AvailableL.H. or R.H. with Inlet Front or BackSee Note 4

Flue GasOutlet Conn

1/2 NPTStack


Gas SupplyConn

Baseline

B

D

E

F

G H

Figure WD-8 � Direct Fired Generator - ABDA 575, 660, 750

BurnerControlPanel

BurnerDirectFiredGen

Baseline

LL

Gas Supply ConnSee Note 7

575 Ton = 13�-3�660 Ton = 11�-6�750 ton = 9�-9� Approx

Figure WD-7 � Front End Elevation - ABDA 575, 660, 750

EE

RuptureDisc Parallel Flow

Crossover PipeElectrical

Service Inlet

KKBaseline

JJ

HH

GG

FFNN

OOCC

DD

UnitControlPanel

Generator/Condenser

Evaporator/Absorber

MM1 5/8� Anchoring Holes

BBAA

Burner


Figure WD-5 � Left Hand Elevation - ABDA 575, 660, 750

Tower Water OutletL.H. ConnSee Note 4

Evaporator Chilled WaterInlet & Outlet Conn�s AvailableSee Note 4

Rupture Disc2� NPT

ServiceManway

Gas SupplyConn

DirectFired

Generator

GenCond

Evap

ABS

J

T S

R Unit Control Panel

Tower Water InletL.H. ConnSee Note 4

W

K L

V

UN


O

P

CQ

A

Baseline

M

83054 ABS-DS-6.p65 3/26/98, 11:48 AM29

30



1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR WATER CONNECTIONS ARE FOR 8� PIPE. CONDENSER, AND ABSORBER

WATER CONNECTIONS ARE FOR 10� PIPE. AVAILABLE WITH 150# GROOVEDCONNECTION FOR USE WITH STYLE 77 VICTAULIC COUPLING. ALSO, AVAILABLEWITH 150# AMERICAN STANDARD RAISED FACE FLANGE. (FLANGED BOLT HOLESSTRADDLE VERTICAL CENTERLINE).


NOT APPLY MORE THAN 12 PSI INTERNAL PRESSURE ON MACHINE WITHOUTREMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THEOUTSIDE TO MEET LOCAL CODE.



Table WD-3 � Unit Dimensions - EnglishFigure Reference ABDA 575-660-750

A 1/2�B 9�-6 7/8�C 7�-11 5/8�D 5�-4 1/8�E 1�-8�F 3�-1�G 7�-5 3/4�H 2�-2�J 8�-6 3/8�K 1�-1 3/4�L 4�-9�M 11 1/4�N 2 3/4�O 2�-6 7/8�P 5�-4 1/8�Q 9�-5 7/8�R 3�-4 1/2�S 10�-1 3/4�T 7� approxU 1�-8�V 3�-1�W 3�-2�AA 30�-11 1/4�BB 27�-0�CC 1�-1 5/8�DD 4�-6�EE 2�3 7/8�FF 5 1/4�GG 3�-7 1/8�HH 3�-6�JJ 11 1/4�KK 26�-10 3/4�LL 7�-1 3/8�

MM 1�-7 3/8�


1/2� UNLESS OTHERWISE SPECIFIED.4. EVAPORATOR WATER CONNECTIONS ARE FOR 8� PIPE. CONDENSER, AND ABSORBER

WATER CONNECTIONS ARE FOR 10� PIPE. AVAILABLE WITH 150# GROOVEDCONNECTION FOR USE WITH STYLE 77 VICTAULIC COUPLING. ALSO, AVAILABLEWITH 150# AMERICAN STANDARD RAISED FACE FLANGE. (FLANGED BOLT HOLESSTRADDLE VERTICAL CENTERLINE).


NOT APPLY MORE THAN 12 PSI INTERNAL PRESSURE ON MACHINE WITHOUTREMOVING RUPTURE DISC. PIPE RUPTURE DISC TO FLOOR VENT OR TO THEOUTSIDE TO MEET LOCAL CODE.



Table WD-4 � Unit Dimensions - (SI) - mmFigure Reference ABDA 575, 660, 750

A 12.7B 2917.8C 2428.9D 1628.8E 508.0F 939.8G 2279.7H 660.4J 2600.3K 349.3L 1447.8M 285.8N 69.9O 784.2P 1628.8Q 2892.4R 1028.7S 3092.5T 177.8 approxU 508.0V 939.8W 965.2AA 9429.8BB 8229.6CC 346.1DD 1371.6EE 708.0FF 133.4GG 1095.4HH 1066.8JJ 285.8KK 8197.8LL 2168.5

MM 492.1

83054 ABS-DS-6.p65 3/26/98, 11:48 AM30

31


Weights, Rigging,Clearances

Figure WD-9 � Rigging Instructions

Cables

Lift Point2� (51mm) Holes(Both Ends)

45 Deg. Min.

Figure WD-10 � Space Requirements

Flue Gas Outlet Conn Detail(Dimensions Typ. - All 4 Sides)Tolerance = ± 1/16

Follow the Local Codesfor Duct Clearance Abovethe Flue Gas Outlet

Minimum RecommendedSpace Envelope

Tube Pull Clearance Areafor Evaporator/Absorber/CondenserOn Right End, as Shown, or Left End

Tube Pull Clearance Areafor Direct Fired GeneratorRight Hand End Only

To Facilitate Removal of SprayTrees (If Required), RecommendClearance on Left End

DirectFiredGenerator

Evap/ABSGen/Con

8 x 1 -5/8�Anchoring Holes5/16� ThickIsolation Pad

UnitControlPanel

Baseline

A

B

N

ML

K

R

Q

S

OP

T

JH

G

C

D

Baseline

E

B

F

1�-4� Square

16 x 5/8�

W

U

V

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

✷✷✷✷✷

Plan View*Machine Floor Loading (PSI) - See Table 3

Unit Base

3/4� Anchor Bolt

Nuts and Washersto Suit

5/16� ThickIsolation Pad

I-Beam or Concrete6-8� Height

Unit Anchoring Detail

83054 ABS-DS-6.p65 3/26/98, 11:48 AM31

32



Table WD-6 � Anchor and Flue Locations (English)Figure Reference ABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750

G 5 3/8� 5 3/8� 5 3/8� 5 3/8� 5 3/8� 5 3/8�H 10 3/4� 10 3/4� 10 3/4� 10 3/4� 10 3/4� 10 3/4�J 14�-9 1/2� 14�-9 1/2� 14�-9 1/2� 23�-10� 23�-10� 23�-10�K 10 1/2� 10 1/2� 10 1/2� 10 1/2� 10 1/2� 10 1/2�L 3�-0� 3�-0� 3�-0� 3�-0� 3�-0� 3�-0�M 6�-6 3/4� 6�-6 3/4� 6�-6 3/4� 6�-6 3/4� 6�-6 3/4� 6�-6 3/4�N 1�-10� 1�-10� 1�-10� 1�-10� 1�-10� 1�-10�O 6�-6� 7�-3� 8�-0� 9�-11� 11�-8� 13�-5�P 6�-5 7/8� 5�-8 7/8� 4�-11 7/8� 12�-1 3/8� 10�-4 3/8� 8�-7 3/8�Q 1�-1 3/4� 1�-1 3/4� 1�-1 3/4� 1�-1 3/4� 1�-1 3/4� 1�-1 3/4�R 4�-9� 4�-9� 4�-9� 4�-9� 4�-9� 4�-9�S 3�-2� 3�-2� 3�-2� 3�-2� 3�-2� 3�-2�T 7�-5 3/4� 7�-5 3/4� 7�-5 3/4� 7�-5 3/4� 7�-5 3/4� 7�-5 3/4�U 2�-0� 2�-0� 2�-0� 2�-0� 2�-0� 2�-0�V 1�-0� 1�-0� 1�-0� 1�-0� 1�-0� 1�-0�W 1�-10� 1�-10� 1�-10� 1�-10� 1�-10� 1�-10�

CUSTOMER NOTES:1. DO NOT RUN WIRING OR PIPING ACROSS THE FRONT OR PANEL SIDE OF THE UNIT

WHERE MOST SERVICE IS PERFORMED (THE FRONT IS THAT SIDE ON WHICH THE MAINCONTROL PANEL IS MOUNTED).

2. UNIT TO BE INSTALLED ON LEVEL SURFACE. HOUSEKEEPING PAD RECOMMENDED.3. USE ANCHORING HOLES, AS REQUIRED, TO MEET LOCAL CODES, ANCHORING HARDWARE IS PROVIDED BY CUSTOMER4. ISOLATION PADS ARE PROVIDED WITH THE UNIT.5. RECOMMENDED SPACE ENVELOPE PROVIDES MINIMUM 3 FT CLEARANCE AT RIGHT END OF UNIT, WITH 4 FT

AT FRONT, BACK AND LEFT END (TO DIRECT-FIRED GENERATOR). ALLOW MINIMUM OF 1�-6� CLEARANCE ABOVE UNIT.

Table WD-5 � Service Clearances (English)Figure Reference ABDA 380, 440, 500 ABDA 575, 660, 750

A 18�-6� 18�-6�B 5�-0� 5�-0�C 41�-6� 59�-6�D 6�-0� 6�-0�E 13�-6� 22�-6�F 5�-0� 5�-0�

Table WD-7 � WeightsWeights Unit Brine Charge System Water Capacity

Model Shipping Operating Solution Refrigerant Evaporator Cond/Abs.(Lbs) (Lbs) (Lbs) (Gals) (Gals) (Gals)

ABDA-380 32900 45800 9075 105 130 250ABDA-440 34500 48300 9645 115 145 280ABDA-500 36000 50500 10140 120 160 305ABDA-575 42300 60700 12620 140 250 375ABDA-660 44600 64500 13750 155 225 335ABDA-750 46800 68300 14950 170 280 410

83054 ABS-DS-6.p65 3/26/98, 11:48 AM32

33



Table WD-9 � Anchor and Flue Locations (SI) mmFigure Reference ABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750

G 136.5 136.5 136.5 136.5 136.5 136.5H 273.1 273.1 273.1 273.1 273.1 273.1J 4508.5 4508.5 4508.5 7264.4 7264.4 7264.4K 266.7 266.7 266.7 266.7 266.7 266.7L 914.4 914.4 914.4 914.4 914.4 914.4M 2000.3 2000.3 2000.3 2000.3 2000.3 2000.3N 558.8 558.8 558.8 558.8 558.8 558.8O 1981.2 2209.8 2438.4 3022.6 3556 4089.4P 1978.0 1749.4 1520.8 3692.5 3159.1 2625.7Q 349.3 349.3 349.3 349.3 349.3 349.3R 1447.8 1447.8 1447.8 1447.8 1447.8 1447.8S 965.2 965.2 965.2 965.2 965.2 965.2T 2279.7 2279.7 2279.7 2279.7 2279.7 2279.7U 609.6 609.6 609.6 609.6 609.6 609.6V 304.8 304.8 304.8 304.8 304.8 304.8W 558.8 558.8 558.8 558.8 558.8 558.8

CUSTOMER NOTES:1. DO NOT RUN WIRING OR PIPING ACROSS THE FRONT OR PANEL SIDE OF THE UNIT

WHERE MOST SERVICE IS PERFORMED (THE FRONT IS THAT SIDE ON WHICH THE MAINCONTROL PANEL IS MOUNTED).

2. UNIT TO BE INSTALLED ON LEVEL SURFACE. HOUSEKEEPING PAD RECOMMENDED.3. USE ANCHORING HOLES, AS REQUIRED, TO MEET LOCAL CODES, ANCHORING HARDWARE IS PROVIDED BY CUSTOMER4. ISOLATION PADS ARE PROVIDED WITH THE UNIT.5. RECOMMENDED SPACE ENVELOPE PROVIDES MINIMUM 3 FT CLEARANCE AT RIGHT END OF UNIT, WITH 4 FT

AT FRONT, BACK AND LEFT END (TO DIRECT-FIRED GENERATOR). ALLOW MINIMUM OF 1�-6� CLEARANCE ABOVE UNIT.

Table WD-8 � Service Clearances (SI) mmFigure Reference ABDA 380, 440, 500 ABDA 575, 660, 750

A 5638.8 5638.8B 1524.0 1524.0C 12649.2 18135.6D 1828.8 1828.8E 4114.8 6858.0F 1524.0 1524.0

Table WD-10 - WeightsWeights Unit Brine Charge System Water Capacity

Model Shipping Operating Solution Refrigerant Evaporator Cond/Abs.(Kg) (Kg) (Kg) (l) (l) (l)

ABDA-380 14923 20775 4116 397 492 946ABDA-440 15649 21909 4375 435 549 1060ABDA-500 16330 22907 4600 454 606 1154ABDA-575 19187 27534 5724 530 946 1419ABDA-660 20231 29257 6237 587 852 1268ABDA-750 21228 30987 6781 643 1060 1552

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DimensionalData

Figure WD-11 � Break Apart & Center of Gravity - 2-Piece Disassembly

®

HighTemp

Generator

2�-7 5/8�

5�-3�

4�-1�

7�-8�3�-6 5/8�

3�-4�

6�-10�

4�-7 1/4�

Absorber

Evaporator

CondenserGenerator

Figure WD-12 � 3-Piece Disassembly

3�-3 3/4�Condenser

Generator

6�-4 1/4�

3�-5 3/8�

1�-3�

7�-0 7/8�

3�-8 1/4�

Evaporator

Absorber

3�-5 5/8�

6�-10�

HighTemp

Generator

2�-7 5/8�

4�-1�

7�-8�

5�-3�

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DimensionalData

Table WD-11 � Component Dimensions - EnglishMajor Component Length Dimension

Machine SizesABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750

Gen/Cond 21�-2 1/4� 30�-7 7/8�Evap/Abs 21�-2 1/4� 30�-2 3/4�

High Temp Generator 14�-6 1/8� 15�-3 1/8� 17�-4� 18�-6 7/8� 20�-4 5/8� 22�-1 5/8�Gen/Cond-Evap/Abs 21�-2 1/4� 30�-11 1/4�

Table WD-12 � Weights - EnglishMachine Size High Temperature Generator/Condenser

Direct-Fired Generator Generator/Condenser Evaporator/Absorber Evaporator/Absorber Total(Lbs) (Lbs) (Lbs) (Lbs) (Lbs)

ABDA-380 6200 7200 19600 26800 33000ABDA-440 6700 7500 20400 27900 34600ABDA-500 7200 7700 21200 28900 36100ABDA-575 7300 10200 24900 35100 42400ABDA-660 8400 10500 25700 36200 44600ABDA-750 9500 10800 26500 37300 46800

Table WD-13 � Component Dimensions (SI) mmMajor Component Length Dimension

Machine SizesABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750

Gen/Cond 6508.8 9344.0Evap/Abs 6508.8 9213.9

High Temp Generator 4422.8 4651.4 5283.2 5664.0 6213.5 6746.9Gen/Cond-Evap/Abs 6508.8 9429.8

Table WD-14 � Weights (SI) KgMachine Size High Temperature Generator/Condenser

Direct-Fired Generator Generator/Condenser Evaporator/Absorber Evaporator/Absorber Total(Kg) (Kg) (Kg) (Kg) (Kg)

ABDA-380 2812 3266 8890 12156 14968ABDA-440 3039 3402 9253 12655 15694ABDA-500 3266 3493 9616 13109 16375ABDA-575 3293 4627 11294 15921 19214ABDA-660 3810 4763 11658 16420 20230ABDA-750 4309 4899 12020 16919 21228

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DimensionalData

Figure WD-13 � Rigging Sub Assembly Components - Direct-Fired Generator

Cables

High TempGeneratorSection

ComponentLift Points2� (51mm)(4 Holes)

45º

Figure WD-14 � Low Temp Generator/Condenser Section

Cables


Low TempGenerator/CondenserSection

45º

Figure WD-15 � Evaporator/Absorber - Generator/Condenser Section


Cables

Evap/ABS-Generator/CondenserSection

45º

Figure WD-16 � Evaporator/Absorber Section

Cables


Evaporator/ABS Section

45º

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DimensionalData

Figure WD-17 � Unit Insulation

211º

123º

305º

185º

143º

118º

165º

320º175º

276º

200º

126º

165º

187º

HIGH TEMPERATUREINSULATION

210º 175º

LOW TEMPERATUREINSULATION

305º

HIGH TEMPERATURE INSULATION(COVER ENTIRE GENERATORS)

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Table WD-15 � Low Temperature (Cold) Insulation (English)Cold Insulation ABDA-380,440,500 ABDA-575,660, 750

Evaporator Shell (Sq. Ft) 88 100Evaporator water boxes and 70 115

Refrigerant Storage Tank(Sq. Ft.)

4� Pipe (Ln Ft) 3 32� Pipe (Ln Ft) 6 5

DimensionalData

Table WD-16 � High Temperature (Hot) Insulation (English)Hot Insulation ABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750Direct-Fired 203 219 235 275 312 349

Generator (Sq. Ft.)High Temp Heat 23 23 23 26 26 26

Exchanger (Sq. Ft.)Low Temp Heat 28 28 28 31 31 31

Exchanger (Sq. Ft.)8� Pipe (Ln Ft) 13.5 12.75 12.0 10.0 8.33 6.584� Pipe (Ln Ft) 7.75 7.75 7.75 7.75 7.75 7.753� Pipe (Ln. Ft) 6 6 6 6 6 6

2 1/2� Pipe (Ln Ft) 3.4 3.4 3.4 3.4 3.4 3.42� Pipe (Ln Ft) 13 13 13 13 13 13

Table WD-17 � Low Temperature (Cold) Insulation (SI)Cold Insulation ABDA-380,440,500 ABDA-575,660, 750

Evaporator Shell (Sq. M) 8.18 10.68Evaporator water boxes and 6.5 10.68

Refrigerant Storage Tank(Sq. Ft.)

4� Pipe (Ln M) 1.07 1.072� Pipe (Ln M) 2.15 2.15

Table WD-18 � High Temperature (Hot) Insulation (SI)Hot Insulation ABDA-380 ABDA-440 ABDA-500 ABDA-575 ABDA-660 ABDA-750Direct-Fired 18.86 20.34 21.82 25.55 29.98 32.42

Generator (Sq. M)High Temp Heat 2.14 2.14 2.14 2.42 2.42 2.42

Exchanger (Sq. M)Low Temp Heat Exchanger 2.6 2.6 2.6 2.88 2.88 2.88

Exchanger (Sq. M)8� Pipe (Ln M) 4.8 4.6 4.3 3.6 3.0 2.44� Pipe (Ln M) 2.77 2.77 2.77 2.77 2.77 2.773� Pipe (Ln. M) 2.15 2.15 2.15 2.15 2.15 2.15

2 1/2� Pipe (Ln M) 1.22 1.22 1.22 1.22 1.22 1.222� Pipe (Ln M) 4.65 4.65 4.65 4.65 4.65 4.65

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MechanicalSpecification

GeneralUnit shall be a complete double-effectdirect-fired absorption chiller packagebuilt in an ISO 9001 environment. Thechiller shall consist of a direct-firedgenerator, low temperature generator/condenser section, evaporator/absorber section, controls, pumps, heatexchangers, burner assembly and fuelsupply system. All units shall be ofhermetic design, factory assembledand leak tested prior to shipment. Thecontrol panel, sensors, burner, burnercontrols and gas control system shallbe factory installed. The unit shall bepainted prior to shipping with twocoats of water base air dry primer. Thestandard method of shipment shall beby truck from the USA.

Low Temperature Generator/Condenser-Evaporator/AbsorberThe shell material shall be carbon steel.The low temperature generator,evaporator and absorber tube materialshall be 95/5 CuNi. Condenser tubesshall be copper. Tubes shall bemechanically rolled into the tubesheetsand shall be replaceable from eitherend. Condenser, evaporator andabsorber tube supports shall be fixed.The low temperature generator shallconsist of fixed and floating tubesupports to allow for even tubeexpansion. Spray systems shall bereplaceable from end of unit withoutsacrificing the hermetic integrity of theunit.

The standard design working pressurefor the waterboxes shall be 150 psig.All tube bundles shall be tested at 150percent of design working pressure.All waterboxes except low temperaturegenerator shall have gasketedremovable covers for access. Marine-type waterboxes shall be provided witheither Victaulic� or raised face flangedconnections.

Heat ExchangersTwo welded plate solution heatexchangers shall be provided toimprove unit performance. Heatexchanger surfaces shall be 300 seriesstainless steel.

PumpsSolution and refrigerant shall becirculated by means of four hermetic,single stage centrifugal pumps. Thepump impeller shall be cast iron with asteel shaft. The motor bearings shallbe lubricated and the motor shall becooled by the fluid that is pumped.Adjustable frequency drives shall beprovided on the low temperaturegenerator pump and the absorberspray pump to provide solution flowcontrol.

PurgeThe purge system shall include acollection chamber in the absorbersection, an eductor for moving non-condensables to the condenser,Purifier� purge shall be supplied tocollect the non-condensables in anexternal storage tank, and a vacuumpump provided for removal of the non-condensables. The purge shall operateautomatically to remove non-condensables from the unit duringperiods of chiller operation andshutdown. Logging of the purgeinformation shall be provided via theunit control panel.

Direct-Fired GeneratorAn ob-round shell shall be fabricated ofcarbon steel containing a horizontalfire/flue tube generator. Fire tube, gasturn box, tube sheets and all generatortubes shall be constructed of stainlesssteel. Generator tubes shall be 1-1/8inches .055� wall, 409 stainless steeland shall be individually rolled andwelded into tubesheets. Unit direct-fired generator shall include rupturedisk, located on the low temperaturegenerator outlet box and shall be sizedto meet ANSI/ASHRAE B-15. Otheritems which shall be included are:refractory lined burner mounting plate,flue gas access door, integral exhaustgas recirculation system when requiredfor emissions control, condensatecollection system for flue gas and sightglass for observation of the flame.

BurnerThe burner shall be completelyassembled, installed and wired prior toshipment. The burner shall meetmaximum NOx requirements of 30ppm when firing on natural gas. Theburner shall support 8 to 1 turndownwith natural gas. The flue gasrecirculation parts, when needed, shallbe shipped lose and provided for fieldinstallation.

Exhaust Gas Duct and Flue StackThe exhaust gas duct and flue stackshall be provided and installed byothers. The flue exhaust duct and fluestack must be designed of material incompliance with municipal, state andfederal regulations. The duct and stackmust be heat-resistant to accepttemperatures up to 675 degrees F. Fluestack should be sized to provide andexhaust gas pressure at the unit of 0 to+/- 0.2� water.

Unit OptionsSimultaneous hot water heatexchanger shall provide simultaneousheating and cooling or heating andcooling . A 3-way valve assembly shallbe provided for hot water flow control.Dual fuel using gas/propane or gas/oilcombinations shall be available.Industrial package shall include specialtubing and an option for a factorymounted lithium bromide filter. Thedisassembled unit shall provide foreasy disassembly and re-assembly ofmajor components at the jobsite.

Power PanelA factory wired and mounted powerpanel shall include: main powerconnection, control transformer and115 volt single phase control circuit.Unit shall be available for operation on200,230, 460 or 575 volts, 3-phase, 60hertz power or 190,220, 380 or 415volts, 3-phase, 50 hertz power.

®

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Control PanelThe factory mounted unit control panel(UCP2) is a microprocessor-basedchiller control system that providescomplete stand alone operation. TheUCP2 shall provide the following items:

Control Function� Chilled water temperature control� Concentration Control� Simultaneous heating and cooling (opt)

System Functions� User interface with a 40 character, 2 line

display and a 16 key keypad, capable ofdisplaying 7 languages in SI or Englishunits.

� Passwords for protection of unit setupand configuration

� Chilled water pump control� Absorber/Condenser pump control� Automatic and manual purge system� Chilled water reset� Simultaneous heating: cooling only,

heating only, cooling priority andheating priority (opt)

� Simultaneous heating water pumpcontrol (opt)

� Minimum turndown of 8 to 1 withnatural gas

� Minimum turn-down of 3 to 1 with oil(opt)

� Start/stop and reset of flame safeguardat UCP2

� Combustion confirmation and alarmstatus at UCP2

� Fuel selection and automatic fuelchangeover (opt)

� Remote clear language display panel -capable of monitoring 1-4 chillers perpanel (opt)

MechanicalSpecification

Adaptive Limits� Evaporator water temperature limit� High interstage pressure limit� High exhaust gas temperature limit� High interstage temperature limit� Low absorber/condenser limit� Soft-loading control

System Protection� Evaporator freeze protection� Chilled water flow confirmation� Cooling water flow confirmation� Simultaneous hot water flow

confirmation (opt)� High interstage pressure cutout to

prevent excessive pressure� Phase loss, phase reversal and under/

over voltage detection� Emergency stop/shutdown of burner

Monitor and Displays� Chilled water temperature entering and

leaving� Absorber/Condenser water

temperature entering and leaving� Evaporator water flow (opt)� Cooling water flow (opt)� Solution concentrations� Solution temperatures� Interstage pressure� Total motor current� Unit voltage� Chiller run time and starts� Purge operation and run time

Interfaces to UCP2�

� Interface to Tracer 100 or TracerSummit®

� External machine manual reset alarmindication output

� External machine auto reset warningindication output

� External limit warning indication output� External burner fire rate output� External combustion indication output� Interstage pressure relief request

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

shutdown of unit� External selection of heating/cooling

priority (opt)� External fuel type selection (opt)� External chilled water setpoint (opt)� External heated water setpoint (opt)� Tracer temperature sensor (opt)� Tracer controlled relay (opt)� Printer interface (opt)� Remote Clear Language Interface

The Trane CompanyNorth American Commercial Group3600 Pammel Creek RoadLa Crosse, WI 54601-7599http://www.trane.com

An American Standard Company

Since The Trane Company has a policy of continuousproduct improvement, it reserves the right to changedesign and specification without notice.

Library Product Literature

Product Section Refrigeration

Product Horizon Direct-Fired Absorption

Model 000

Literature Type Data Sales Catalog

Sequence 6

Date June 1997

File No. PL-REF-ABS-000-DS-6-697

Supersedes ABS-D-3Ordering No. ABS-DS-6

83054 ABS-DS-6.p65 3/26/98, 11:48 AM40

direct-fired absorption water chillers, 380-750 … abs-ds-6 may 1997 first printing trane horizonŽ...

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