Centrifugal Water Chillers · Touch sensitive screen provides information and navigation at the same time Change setpoints and settings with touch screen commands Displays chiller

CTV-PRC001-GBSeptember 2004

CentrifugalWater Chillers

Model CVGFWater-Cooled Hermetic Centrifugal

Refrigeration Capacities From

400 to 1000 Tons (1400 kW-3510 kW)

50 and 60 Hz

CTV-PRC001-GB© 2004 American Standard Inc. All rights reserved.

Introduction

Introducing Trane’s Model CVGFCentrifugal Water Chiller

IntroductionThe basic gear driven centrifugal waterchiller design was introduced in 1976and has been proven in thousands ofinstallations. The Trane Companycontinues to deliver its reliability andenergy fitness commitment on itsnewest line of gear drive centrifugalwater chillers, the Model CVGF. Themajor advantages of the Model CVGFare:• High reliability• Low sound levels• Compact size• High efficiency at a competitive

market price• Designed to use environmentally

responsible HFC-134a refrigerant.

The Model CVGF chiller is ideal foroffice, hospital, school, hotel, retailstore and industrial buildings. TheTrane centrifugal chiller line offershundreds of individual evaporator-condenser-compressor combinationselections, permitting precise tailoringof the machine capacity to systemrequirements. Machine selections canbe computer optimized to provide lowfirst cost, low operating cost or othercriteria important for a particularselection. Centrifugal Water Chillercomputer selection program is certifiedin accordance with ARI standard 550/590. Trane Sales Engineers areavailable to assist in selecting theoptimum machine to satisfy theparticular project requirements.

Turn to the Model CVGF for energyefficiency provided by the two stagegear drive centrifugal water chillerswith economizers. The Trane ModelCVGF is your choice for energy fitoperation year after year.

3CTV-PRC001-GB

Introduction

Features and Benefits

Application Considerations

General Data

Jobsite Connections

Controls

Physical Dimensions

Mechanical Specifications

Conversion Table

Contents

2

4

9

10

12

13

17

19

23

CTV-PRC001-GB4

Environmental Features andBenefits

Improved Efficiency:• High Efficiency: 0.55 kW/Ton at ARI

conditions• Motor cooling vented to economizer

cycle, efficiency advantage• HFC-134 optimized inlet guide vanes

and impellers for improved cycleefficiency using computational fluiddynamics

Reduced Emissions:• Over 30 percent joint reduction in

compressor/motor assemblycompared to previous designs

• Patented integral heaters imbeddedinto the compressor casting, no sealsno leaks

• Beaded flat gasket technology insteadof O-rings, lower susceptibility todeveloping leaks

• Minimal NPT pipe threads on chillersystem, SAE O-ring boss fitting, lowerleak potential

• Oil sump internal to compressor/motor assembly with internal pump/motor; eliminates vent and drainlines, leak prevention

• Patented internal oil filter preventsleaks and contamination from pipes;filter is isolated and easily replaced

• Advanced evaporator designminimizes the refrigerant charge; areduced charge reduces the exposureto the environment in the event of acatastrophic charge loss

Additional Features andBenefits• Patented polygon attachment instead

of a keyed shaft, self-balancing• Easy to replace motor terminals• Motor/stator assembly is easily

removed; speed assembly can beremoved independent of the high-speed assembly

• Rolling element bearings• Hydrodynamic bearings• Advanced evaporator design:

no eliminator necessary with anadvanced suction baffle design

• All metric fasteners

Standard CVGF FeaturesThe following features are provided asstandard with all Trane Model CVGFchillers:• Hermetic two-stage centrifugal

compressor-motor assembly withintegral lubrication system andeconomizer cycle

• Evaporator and condenser assembly• Prewired instrument and control

panel• Oil charge• Integral oil heaters• Isolation pads• Wiring and oil system interconnection

to main control panel• Advance motor protection• Two-stage gear drive with

economized cycle for high efficiencyand high reliability

• Liquid cooled hermetic inductionmotor; the motor operates at lowertemperatures for longer motor life

Optional Features• Unit and remote wye-delta mounted

starters• Unit mounted, floor mounted, and

wall mounted solid state starters.• Across-the-line, Primary Reactor, and

Auto Transformer Remote mountedstarter for medium/high voltage

• Marine waterboxes for evaporatorand condenser

• Factory-applied thermal insulation• One-inch deflection spring isolators

for vibration-sensitive installations• Refrigerant available from a local

distributor• Building automation systems (BAS)

Interface• Factory testing

Applications• Comfort cooling• Industrial process cooling

Patents• Polygon drive for refrigeration

compressor impellers• Centrifugal compressor sump

demister• Internal oil filter• Thermosiphonic oil cooler• Compressor height and alignment

adjustment• Oil return using hot gas for motive

force• Centrifugal impeller assembly• Internal oil filter

Orifice System• Simplified orifice system with

improved part load performancedown to 20 percent part load

Advanced Heat Transfer Surfaces• Evaporator and condenser tubes use

the latest heat transfer surfaces• Less refrigerant needed due to

advanced patented evaporator design

Compact Size• Designed with the retrofit and

replacement market in mind• The 400 to 500 NTON sizes can fit

through most double-width doors• Small footprint of the CVGF chiller

saves valuable equipment roomspace

Simple Installation• Simplified piping; the only water

piping required is for the evaporatorand condenser

• Simple power connection• Unit mounted starter eliminates

additional jobsite labor requirements

Features andBenefits

5CTV-PRC001-GB


Microprocessor Controls withCH530

DynaView Operator Interface

DynaView™ is the unit-mounted controlpanel and also serves as the mainprocessor and operator interface. It hasa touch-sensitive overlay on a 1/4VGA display.

DynaView presents information throughan intuitive, tabbed- navigation system.Alternate languages can be downloadedto the control panel, which can holdEnglish plus two other languages atone time.

DynaView can be connected to theservice tool using a standard 9-pinmale, 9-pin female RS-232 serial cable.The serial connection is located at thebottom of the DynaView panel behinda sliding door.

DynaView receives information fromand communicates information to theother devices on the chiller’scommunications link. DynaViewperforms the Leaving Chilled WaterTemperature and Limit Controlalgorithms, arbitrating capacity againstany operating limit against which thechiller may find itself working.

• Auto/Stop commands

• Status (all subsystems)

• Setpoint adjustment(daily user points)

• 10 active diagnostics

• Mode overrides

• ASHRAE chiller log

Touch sensitive screen provides informationand navigation at the same time

Change setpoints and settings with touchscreen commands

Displays chiller status and operating points.Touch for more information

lf diagnostic exists, an alarm indicator willappear. Press for detail.

Auto / Stop

Contrast Control

Extensive diagnostics customized to thechillar type installed-centrifugal, helicalrotary, or absorption

CTV-PRC001-GB6


Serviceability

Previous Trane chiller controllersincluded a user interface that presentedall chiller data necessary for both dailytasks and service or maintenance tasks.The amount of information presentedon a limited display made a number oftasks difficult. A service technician’sability to assess and resolve chillerproblems was hampered by the limitedpresentation of multiple pieces ofchiller information.

The Tracer chiller controller adds a levelof sophistication better served by a PCapplication that improves servicetechnician effectiveness and minimizeschiller downtime. The Tracer chillercontroller provides a user interface andmain processor, DynaView, that isintended to serve only typical dailytasks. The portable, PC-based servicetool software, TechView, supportsservice and maintenance tasks.

The Tracer chiller controller will begradually applied to all Trane chillers.TechView will then serve as a commoninterface to all Trane chillers, and willcustomize itself based on theproperties of the chiller with which it iscommunicating. Thus, the servicetechnician learns only one serviceinterface.

The panel bus is easy to troubleshoot,using LED verification of sensors. Onlythe defective device is replaced.Captive screws ensure that theappropriate mounting hardware isavailable. TechView can communicatewith individual devices or groups ofdevices.

TechView™

All chiller status, machine configurationsettings, customizable limits, and up to60 active or historic diagnostics aredisplayed through the service-toolsoftware interface. Any PC that meetsthe system requirements maydownload the service interfacesoftware and DynaView updates fromTrane’s Web site at www.trane.com.

TechView is designed to run on acustomer’s laptop, which connects toDynaView with a serial cable.DynaView’s serial port is locatedbehind a sliding door on the bottom ofthe DynaView enclosure. It uses astandard 9-pin male and 9-pin femaleRS-232 cable.

Hardware requirements for TechView:

• Pentium II, III, or higher processor

• 128 MB RAM

• 1024 x 768 resolution

• CD-ROM

• 56K modem

• 9-pin RS232 serial connection

• Windows® 95, 98, 2000

7CTV-PRC001-GB


Feedforward AdaptiveControl

The Tracer chiller controller allows thesystem designer to explore energysaving strategies and allows thecentrifugal chiller to be used in waysthat were never thought possible.

Feedforward Adaptive ControlFeedforward is an open-loop,predictive control strategy designed toanticipate and compensate for loadchanges. It uses evaporator entering-water temperature as an indication ofload change. This allows the controllerto respond faster and maintain stableleaving-water temperatures.

Soft LoadingThe chiller controller uses soft loadingexcept during manual operation. Largeadjustments due to load or setpointchanges are made gradually,preventing the compressor fromcycling unnecessarily. It does this byinternally filtering the setpoints to avoidreaching the differential-to-stop or thecurrent limit. Soft loading applies to theleaving chilled-water temperature andcurrent-limit setpoints.

Multi-Objective Limit ArbitrationThere are many objectives that thecontroller must meet, but it cannotsatisfy more than one objective at atime. Typically, the controller’s primaryobjective is to maintain the evaporatorleaving-water temperature.

Whenever the controller senses that itcan no longer meet its primaryobjective without triggering aprotective shutdown, it focuses on themost critical secondary objective.When the secondary objective is nolonger critical, the controller reverts toits primary objective.

Fast RestartWhile the inlet guide vanes are closing,the controller will allow the centrifugalchiller to restart and going to apostlube operational mode. If thechiller shuts down on a nonlatchingdiagnostic, the diagnostic has 30–60seconds to clear itself and initiate a fastrestart. This includes momentarypower losses.

Building Automation andChiller Plant Control

For a preprogrammable and flexiblebuilding automation and chiller plantcontrol, Trane has developed the TracerSummit™. It can control the operationof the complete installation: chillers,pumps, cooling towers, isolatingvalves, air handlers and terminal units.Trane can undertake full responsibilityfor an optimized automation andenergy management for the entirechiller plant.

The main functions are:

• Chiller sequencing: equalizes thenumber of running hours of thechillers. Different control strategies areavailable depending on theconfiguration of the installation.

• Control of the auxiliaries: includesinput/output modules to control theoperation of the various auxiliaryequipments (water pumps, valves,cooling towers, etc.)

• Time of day scheduling: allows theend user to define the occupancyperiod, i.e. time of the day, holidayperiods and exception schedules.

• Optimization of the start/stop time ofthe installation: based on theprogrammed schedule of occupancyand on the historical record of thebehavior of the temperatures,calculates the optimal time of startand stop of the installation to get thebest compromise between energysavings and comfort of the occupants.

• Soft loading: the soft loading functionminimizes the number of chillers thatare operated to satisfy the buildingmorning pull down, thus preventingan overshoot of the actual capacityrequired. Unnecessary starts areavoided and the peak current demandis lowered.

CTV-PRC001-GB8

• Communication capabilities: severalcommunication levels are provided:— local, through a PC workstation

keyboard. Summit can beprogrammed to send messages tolocal or remote workstations andor a pager in the following cases:

— Analog parameter exceeding aprogrammed value.

— Maintenance warning.— Component failure alarm.— Critical alarm messages. In this

latter case, the message isdisplayed until the operatoracknowledges the receipt of theinformation. From the remotestation it is also possible to accessand modify the chiller plant’scontrol parameters.

• Remote communication through amodem: As an option, a modem canbe connected to communicate theplant operation parameters throughvoice grade phone lines.

The remote terminal is a PCworkstation equipped with a modemand software to display the remoteplant parameters.

Chiller-Tower OptimizationTracer Summit™ chiller-toweroptimization extends Adaptive Control™to the rest of the chiller plant. Chiller-tower optimization is a unique controlalgorithm for managing the chiller andcooling-tower subsystem. It considersthe chiller load and real-time ambientconditions, then optimizes the towersetpoint temperature to maximize theefficiency of the subsystem.

Integrated Comfort™ System (ICS)The onboard Tracer chiller controller isdesigned to be able to communicatewith a wide range of buildingautomation systems. To take fulladvantage of the capabilities of thechiller, incorporate your chiller into aTracer Summit building automationsystem.

But the benefits do not stop at thechiller plant. At Trane, we realize that allenergy used in your cooling system isimportant. That is why we workedclosely with other equipmentmanufacturers to predict the energyrequired by the entire system. Weused this information to createpatented control logic for optimizingthe HVAC system efficiency.

The building owner’s challenge is to tiecomponents and applications expertiseinto a single reliable system thatprovides maximum comfort, controland efficiency. Trane’s IntegratedComfort™ systems (ICS) are a conceptthat combines system components,controls and engineering applicationsexpertise into a single, logical andefficient system. These advancedcontrols are fully commissioned andavailable on every piece of Traneequipment, from the largest chiller tothe smallest VAV box. As amanufacturer, only Trane offers thisuniverse of equipment, controls andfactory installation and verification.


9CTV-PRC001-GB

Two-Stage CompressorWidens the ApplicationRangeWhy Centrifugal Compressors SurgeCentrifugal compressors produce theirpressure differential (head) byconverting the kinetic energy of the gasleaving the impeller into staticpressure. The velocity of this gas is theresult of two components:• The radial velocity component Vr,which is directly proportional to therefrigerant gas flow Q.

• The tangential velocity component Vt,which is a function of both impellerdiameter D and the rotational speedrpm.

The length of the resultant vector V isproportional to the kinetic energyavailable for conversion to staticpressure in the volute. Consequently,for a given compressor, Vt is fixed andVr varies with the cooling load. With thechiller unloading, the pressuredifferential between evaporator andcondenser decreases. The compressormatches the new load and the lower“head” by closing the inlet guidevanes.

This reduces the gas flow it draws inand modifies its direction. ComponentVr decreases accordingly, the vectordiagram shifts and at some point, thebalance of forces breaks down.

As pressurized gas rushes backwardsthrough the impeller, the pressure inthe gas passages falls, allowing thecompressor to restore the balance offorces. If the process repeats itself, thecompressor is said to surge.

1 - Vr = f (Q)2 - Vt = f (D, RPM)3 - V = Resultant4 - RPM5 - D6 - Q

Two-Stage Compressors Surge Lessand LaterTo produce the same head as a single-stage compressor, two-stage machinesuse two small diameter impellers.Component Vt is the same as on eachstage, though Vr is the same as on asingle-stage compressor. This results ina better balance of forces at low loadsand produces a machine with a widerunloading capability.

In Trane centrifugal chillers, gasprerotation vanes ahead of thecompression stage improve impelleraerodynamic efficiency, resulting insmoother unloading and reducingpower consumption.

The curves show that two-stagecompressors surge less and later thansingle-stage machines. Intersectionpoint B, when the load line meets thesurge area, corresponds to a higherpart load for the single-stagecompressor than would be the casewith a two-stage compressor. Twostage machines, therefore, have awider range of applications.

Typical single-stage compressorperformance curve

1 - Load Line2 - Surge Line3 - A4 - B5 - 40%6 - 90° Vanes7 - 100%8 - Compressor Head9 - Refrigerant Gas Flow

Typical two-stage compressorperformance curve

1 - Load Line2 - Surge Line3 - A4 - B5 - 20%6 - 90°7 - 80°8 - 70° Vanes9 - 100%10 - Compressor Head11 - Refrigerant Gas Flow


CTV-PRC001-GB1 0

Condenser Water Limitations

TemperatureTrane centrifugal chillers start andoperate over a range of load conditionswith controlled water temperatures.Reducing the condenser watertemperature is an effective method oflowering the chiller power input.However, the effect of lowering thecondenser water temperature maycause an increase in system powerconsumption.

In many applications Trane centrifugalchillers can start and operate withoutcontrol of the condenser watertemperature. However, for optimumsystem power consumption, and forany applications with multiple chillers,control of the condenser water circuit isrecommended. Integrated control ofthe chillers, pumps and towers is easilyaccomplished with Trane’s CH530 and/or Tracer system.

Chillers are designed to ARI conditionsof 29.4°C (85°F), but Trane centrifugalchillers can operate to a five psigpressure differential between thecondenser and evaporator at anysteady state load without oil loss, oilreturn, motor cooling, refrigerant hang-up problems. And this differential canequate to safe minimum enteringcondenser water temperatures at orbelow 12.8°C (55°F), dependent on avariety of factors such as load, leavingevaporator temperature andcomponent combinations. Start-upbelow this differential is possible aswell, especially with CH530 soft startfeatures

Water PumpsAvoid specifying or using 3600 rpmcondenser and chilled water pumps.Such pumps may operate withobjectionable noises and vibrations. Inaddition, a low frequency beat mayoccur due to the slight difference inoperating rpm between water pumpsand centrifugal motors. Where noiseand vibration-free operation areimportant, The Trane Companyencourages the use of 1750 rpmpumps.

Water FlowToday’s technology challenges ARI’straditional design of three gpm per tonthrough the condenser. Reducedcondenser flows are a simple andeffective way to reduce both first andoperating costs for the entire chillerplant. This design strategy will requiremore effort from the chiller. But pumpand tower savings will typically offsetany penalty. This is especially truewhen the plant is partially loaded orcondenser relief is available.

In new systems, the benefits caninclude dramatic savings with:• Size and cost for condenser lines and

valves• Size and cost of the cooling tower.• Size and cost of the water pumps.• Pump energy (30 to 35% reduction).• Tower fan energy(30 to 35%

reduction).

Replacement chiller plants can reapeven greater benefits from low flowcondensers. Because the water linesand tower are already in place, reducedflows would offer a tremendous energyadvantage. Theoretically, a 2 GPM/tondesign applied to a system thatoriginally used 3 GPM/ton would offera 70% reduction in pump energy. At thesame time, the original tower wouldrequire a nozzle change but would thenbe able to produce about two degreescolder condenser water than before.These two benefits would againtypically offset any extra effort requiredby the chiller.

Contact your local Trane Sales Officefor information regarding optimumcondenser water temperatures andflow rates for a specific application.

Water TreatmentThe use of untreated or improperlytreated water in a chiller may result inscaling, erosion, corrosion, algae orslime. It is recommended that theservices of a qualified water treatmentspecialist be used to determine whattreatment, if any, is advisable. TheTrane Company assumes noresponsibility for the results ofuntreated, or improperly treated water.

ApplicationConsiderations

1 1CTV-PRC001-GB

GeneralData

Table GD-1 – Model CVGF DescriptionModel CVGFNominal Cooling Capacity

NTON 400 500 500 650 800 1000Heat Exchanger Size

Evaporator EVSZ 500 500 700 700 1000 1000Condenser CDSZ 500 500 700 700 1000 1000

Heat Exchanger BundlesEvaporator EVBS A = Small A = Small A = Small A = Small A = Small A = Small

B = Medium B = Medium B = Medium B = Medium B = Medium B = MediumC = Large C = Large C = Large C = Large C = Large C = Large

D = Extra Large D = Extra Large

Condenser CDBS A = Small A = Small A = Small A = Small A = Small A = SmallB = Medium B = Medium B = Medium B = Medium B = Medium B = MediumC = Large C = Large C = Large C = Large C = Large C = Large

D = Extra Large D = Extra LargeHeat Exchanger Tube

Evaporator EVTM IE25 - 0.635 mm W 25.4 mm Internally Enhanced(IE25 - 0.025” W 1.00” Internally Enhanced)

TE25 - 0.635 mm W19 mm Internally Enhanced(TE25 - 0.025” W 0.75” Internally Enhanced)

Condenser CDTM IE28 - 0.711 mm W 25.4 mm Internally Enhanced(IE28 - 0.028” W 1.00” Internally Enhanced)

TE28 - 0.711 mm W 19 mm Internally Enhanced(TE28 - 0.028” W 0.75” Internally Enhanced)

Evap/Cond Working Pressurebar 10psi 150

Evap/Cond Water ConnectionVictaulic Connection

Flanged Adaptor (English Unit)Flanged Adaptor (SI Unit)

Agency Approvals (Chiller)UL-CUL Listed/ASME

CE Approval/PED (European Code)Motor Volt/Hz

380/400/415/3300/6600 Volts – 50 Hz380/460/575/3300/4160 Volts – 60 Hz

Starter*Unit Mounted Wye-Delta, Solid-State Inside the Delta

Remote Mounted Wye-Delta, Solid-State Inside the Delta, *Across-the-line, *Primary Reactor, *Auto Transformer*Medium Voltage (3300, 4160, 6600) Starter Types - Full Voltage (X-Line), Primary Reactor, Auto Transformer

Table GD-2 – WeightWithout Starter With Starter

Shell Size Operating Shipping Operating ShippingModel Compressor Evaporator Condenser lbs kgs lbs kgs lbs kgs lbs kgsCVGF 400 - 500 500 500 22391 10157 19656 8916 23336 10585 20601 9345CVGF 500 700 700 29438 13353 25593 11609 30383 13782 26538 12038CVGF 650 700 700 30889 14011 27044 12267 31765 14409 27920 12665CVGF 800 1000 1000 41646 18891 35627 16160 42522 19288 36503 16558CVGF 1000 1000 1000 42462 19261 36443 16531 43407 19689 37388 16959**Note: Values represent estimate maximum unit weights including shells with TECU tubes, max bundles, 2 pass evaporator and condenser, 150 psig non-marine waterboxes, and compressors with the largest, low voltage motors for each family.

CTV-PRC001-GB1 2

Table GD-3 – Evaporator and Condenser Flow rates(Minimum and Maximum, liters per second, gallons per minute)

High Efficiency Shells - 0.75 inch (19 mm) Int. Enhanced Cu Tube:

Condenser:

Nominal Shell 500 500 500 700 700 700 1000 1000 1000 1000Bundle Size Small Medium Large Small Medium Large Small Medium Large Extra LargeNumber of Passes 2 2 2 2 2 2 2 2 2 2Min Flow lps (gpm) 31 (487) 34 (542) 37 (586) 42 (668) 47 (744) 52 (816) 59 (938) 67 (1056) 74 (1176) 77 (1213)Max Flow lps (gpm) 113 (1786) 125 (1987) 136 (2148) 155 (2450) 172 (2727) 189 (2993) 217 (3441) 244 (3874) 272 (4311) 280 (4447)Evaporator:


Nominal Shell 500 500 500 700 700 700 1000 1000 1000 1000Bundle Size Small Medium Large Small Medium Large Small Medium Large Extra LargeNumber of Passes 3 3 3 3 3 3 3 3 3 3Min Flow lps (gpm) 17 (271) 19 (305) 21 (340) 24 (378) 26 (419) 29 (465) 35 (548) 39 (614) 43 (681) 48 (757)Max Flow lps (gpm) 63 (995) 71 (1120) 79 (1248) 87 (1385) 97 (1536) 108 (1706) 127 (2009) 142 (2251) 158 (2497) 175 (2777)Standard Efficiency Shells - 1.00 inch (25.4 mm) Int. Enhanced Cu Tube:

Condenser:



Nominal Shell 500 500 500 700 700 700 1000 1000 1000 1000Bundle Size Small Medium Large Small Medium Large Small Medium Large Extra LargeNumber of Passes 3 3 3 3 3 3 3 3 3 3Min Flow lps (gpm) 19 (298) 21 (330) 23 (367) 26 (417) 30 (471) 33 (523) 33 ((521) 38 (598) 42 (669) 47 (744)Max Flow lps (gpm) 69 (1092) 76 (1212) 85 (1346) 96 (1529) 109 (1726) 121 (1916) 120 (1909) 138 (2191) 15 (2452) 172 (2726)

GeneralData

50 and 60 Hz SI Unitsand (English Units)

1 3CTV-PRC001-GB

JobsiteConnections

Supply and Motor LeadWiring and ConnectionsCopper conductors only should beconnected to the compressor motordue to the possibility of galvaniccorrosion as a result of moisture ifaluminum conductors are used.Copper conductors are recommendedfor supply leads in the starter panel.

Suggested starter panel line and loadside lug sizes (when lugs are provided)are noted in the starter submittals.These submitted lug sizes should becarefully reviewed for compatibilitywith conductor sizes specified by theelectrical engineer or contractor. If theyare not compatible, the electricalengineer or contractor should specifythe required lug sizes for the particularapplication. Ground lugs are providedin the motor terminal box and starterpanel. The motor terminals aresupplied with connection pads whichwill accommodate bus bars orstandard terminal lugs (crimp typerecommended). Terminal lugs are field-supplied. These connection padsprovide additional surface area tominimize improper electricalconnections. Also, a 3/8-inch bolt isprovided on all connection pads formounting the lugs. Figure J-1 illustratesthe connection between the motorconnection pads and the terminal lugs.

Figure J-1 — Electric Connections

Shipment and Assembly

All style hermetic centrifugal units shipas a factory assembled, factory testedpackage, ready to rig into place onfactory supplied isolation pads.

Terminal Lugs (Field-Supplied)

Connection Pad

3/8” Bolt

MotorTerminalStud

CTV-PRC001-GB1 4

Controls

Standard Features

Field ConnectionThe field-connected elements areinvolved in physically turning the chilleron or off. This involves ensuring thatthe chiller is not in an emergency orexternal stop condition, starting thepumps, and verifying that flow hasbeen established. The optional, factory-supplied flow switch or acustomer-supplied differential-pressure switch can be used to proveflow.

Heat Exchanger ControlFundamental internal variables that arenecessary to control the chiller aregathered and acted upon by the heatexchanger control function.

Motor Control and CompressorProtectionThis includes all functions that start,run, and stop the motor. The startermodule provides the interface andcontrol of Y-delta, across-the-line,primary reactor, autotransformer, andsolid-state starters. The motor controlalso provides protection to both themotor and the compressor.

Phase Voltage Sensors – 3 phaseIncludes factory-installed potentialtransformers in the starter formonitoring and displaying phasevoltage and provides over/undervoltage protection. DynaView,TechView and Tracer Summit displaythe following:

• Compressor phase voltage(a-b, b-c, c-a)

• Kilowatts

• Power factor (uncorrected)

Standard Features

Chilled-Water ResetChilled-water reset reduces energyconsumption during periods of theyear when heating loads are high andcooling loads are reduced. It is basedon return chilled-water temperature.Resetting the chilled-water temperaturereduces the amount of work that thecompressor must do by increasing theevaporator refrigerant pressure. Thisincreased evaporator pressure reducesthe pressure differential thecompressor must generate while in theheat recovery mode. Chilled-waterreset is also used in combination withthe hot-water control. By resetting thechilled-water temperature upward, thecompressor can generate a highercondenser pressure, resulting in higherleaving hot-water temperatures.

1 5CTV-PRC001-GB

Extended Operation Package

Select the extended-operation packagefor chillers that require external, hotwater control, and/or base-loadingcapabilities. This package also includesa 4-20 mA or 0-10 Vdc analog input fora refrigerant monitor.• External base-loading control input• External base-loading setpoint• External hot-water control input• Refrigerant monitor input

Base-Loading ControlThis feature allows an externalcontroller to directly modulate thecapacity of the chiller. It is typically usedin applications where virtually infinitesources of evaporator load andcondenser capacity are available and itis desirable to control the loading of thechiller. Two examples are industrialprocess applications and cogenerationplants. Industrial process applicationsmight use this feature to impose aspecific load on the facility’s electricalsystem. Cogeneration plants might usethis feature to balance the system’sheating, cooling, and electricalgeneration.

All chiller safeties and Adaptive Controlfunctions are in full effect when BaseLoading is enabled. If the chillerapproaches full current, the evaporatortemperature drops too low, or the

Controls

condenser pressure rises too high, thecontroller’s Adaptive Control logiclimits the loading of the chiller toprevent the chiller from shutting downon a safety limit. These limits mayprevent the chiller from reaching theload requested by the Base Loadingsignal.

An alternative and less radicalapproach to Base Loading indirectlycontrols chiller capacity. Artificiallyload the chiller by setting the chilled-water setpoint lower than it is capableof achieving. Then, modify the chiller’sload by adjusting the current-limitsetpoint. This approach providesgreater safety and control stabilitybecause it leaves the chilled-watertemperature-control logic in effect.The chilled-water temperature controlresponds more quickly to dramaticsystem changes and limits chillerloading prior to reaching an AdaptiveControl limit.

Hot-Water ControlThis feature allows an externalcontroller to enable/disable andmodulate the hot-water control mode.Occasionally, centrifugal chillers areused to provide heating as a primarymission. In this case the externalcontroller or operator would select ahot-water temperature setpoint and thechiller capacity would be modulated to

maintain the setpoint. Heating is theprimary mission and cooling is a wasteproduct or a secondary mission.This technique provides applicationflexibility, especially in multiple-chillerplants in conjunction with undersizedheating plants.

The chiller needs only one condenserfor hot-water control, whereas HeatRecovery uses a secondary condenser.

Refrigerant MonitorThe Extended Operation packageallows for a refrigerant monitor to senda 4-20 mA signal to the DynaViewdisplay. It can be calibrated tocorrespond to either 0-100 ppm or 0-1,000 ppm concentration levels.The concentration level is displayed atDynaView, but the chiller will not takeany action based on the input from therefrigerant monitor.

Alternatively, a refrigerant monitor canbe connected to Tracer Summit, whichhas the ability to increase ventilation inthe equipment room in response tohigh refrigerant concentrations.

OptionalFeatures

CTV-PRC001-GB1 6

ControlsStandardProtections

Tracer™ Chiller Controller

The chiller controller uses proportional-integral-derivative (PID) control for alllimits—there is no dead band. Thisremoves oscillation above and belowsetpoints and extends the capabilitiesof the chiller.

Some of the standard protectionfeatures of the chiller controller aredescribed in this section. There areadditional protection features not listedhere.

High Condenser-Pressure ProtectionThe chiller controller’s condenser limitkeeps the condenser pressure under aspecified maximum pressure. Thechiller runs all the way up to 100percent of the setpoint before reducingcapacity using its adaptive controlmode.

Starter-Contactor Failure ProtectionThe chiller will protect itself from astarter failure that prevents thecompressor motor from disconnectingfrom the line to the limits of itscapabilities.

The controller starts and stops thechiller through the starter. If the startermalfunctions and does not disconnectthe compressor motor from the linewhen requested, the controller willrecognize the fault and attempt toprotect the chiller by operating theevaporator-and condenser-waterpumps and attempting to unload thecompressor.

Loss of Water-Flow ProtectionThe chiller controller has an input thatwill accept a contact closure from aproof-of-flow device such as a flowswitch or pressure switch. Customerwiring diagrams also suggest that theflow switch be wired in series with thecooling-water (condenser-water) pumpstarter’s auxiliary contacts. When thisinput does not prove flow within afixed time during the transition fromStop to Auto modes of the chiller, or ifthe flow is lost while the chiller is in theAuto mode of operation, the chiller willbe inhibited from running by anonlatching diagnostic.

Evaporator Limit ProtectionEvaporator Limit is a control algorithmthat prevents the chiller tripping on itslow refrigerant-temperature cutout. Themachine may run up to the limit butnot trip. Under these conditions theintended chilled-water setpoint maynot be met, but the chiller will do asmuch as it can. The chiller will deliveras much cold water as possible evenunder adverse conditions.

Low Evaporator-Water TemperatureLow evaporator-water temperatureprotection, also known as Freeze Statprotection, avoids water freezing in theevaporator by immediately shuttingdown the chiller and attempting tooperate the chilled-water pump. Thisprotection is somewhat redundant withthe Evaporator Limit protection, andprevents freezing in the event ofextreme errors in the evaporator-refrigerant temperature sensor.

The cutout setting should be based onthe percentage of antifreeze used in thecustomer’s water loop. The chiller’soperation and maintenancedocumentation provides the necessaryinformation for percent antifreeze andsuggests leaving-water temperature-cutout settings for a given chilled-watertemperature setpoint.

Oil-Temperature ProtectionLow oil temperature when the oilpump and/or compressor are runningmay be an indication of refrigerantdiluting the oil. If the oil temperature isat or below the low oil-temperaturesetpoint, the compressor is shut downon a latching diagnostic and cannot bestarted. The diagnostic is reported atthe user interface. The oil heaters areenergized in an attempt to raise the oiltemperature above the low oil-temperature setpoint.

High oil-temperature protection isused to avoid overheating the oil andthe bearings.

Low Differential Oil-PressureProtectionOil pressure is indicative of oil flow andactive oil-pump operation. A significantdrop in oil pressure indicates a failureof the oil pump, oil leakage, or otherblockage in the oil-circuit.

The differential pressure during oilpump, compressor prelube modeshould not fall below 12 psid. A failureon this parameter generates a shutdowndiagnostic. When the compressor isrunning, a diagnostic is issued whenthe differential pressure is lost.

Phase-Unbalance ProtectionPhase-unbalance protection is basedon an average of the three phase-current inputs. The ultimatephase-unbalance trip point is 30percent. In addition, the RLA of themotor is derated by resetting the activecurrent-limit setpoint based on thecurrent unbalance. The RLA derateprotection can be disabled in the field-startup menu.

The following derates apply when thephase-unbalance limit is enabled:

10% unbalance = 100% RLA derate15% unbalance = 90% RLA derate20% unbalance = 85% RLA derate25% unbalance = 80% RLA derate30% unbalance = Shutdown

Phase-Loss ProtectionThe controller will shut down the chillerif any of the three phase currentsfeeding the motor drop below 10percent RLA. The shutdown will resultin a latching phase-loss diagnostic. Thetime to trip is 1 second at minimum, 3seconds maximum.

Phase Reversal/Rotation ProtectionThe controller detects reverse phaserotation and provides a latchingdiagnostic when it is detected. The timeto trip is 0.7 seconds. Phase-rotationprotection can be disabled in TechView.

1 7CTV-PRC001-GB

ControlsStandardProtections

Momentary Power Loss andDistribution Fault ProtectionThree-phase momentary power loss(MPL) detection gives the chillerimproved performance through manydifferent power anomalies. MPLs of 2.5cycles or longer will be detected andcause the unit to shut down. The unitwill be disconnected from the linewithin 6 line cycles of detection. Ifenabled, MPL protection will be activeany time the compressor is running.MPL is not active on reduced-voltagestarters from the initial start signalthrough transition. The MPL diagnosticis an automatic reset diagnostic. MPLprotection can be disabled in TechView.

An MPL has occurred when the motorno longer consumes power. An MPLmay be caused by any drop or sag inthe voltage that results in a change inthe direction of power flow. Differentoperating conditions, motor loads,motor size, inlet guide vane (IGV)position, etc. may result in differentlevels at which this may occur. It isdifficult to define an exact voltage sagor voltage level at which a particularmotor will no longer consume power,but we are able to make some generalstatements concerning MPL protection:

The chiller will remain running underthe following conditions:

• Line-voltage sag of 1.5 line cycles orless for any voltage magnitude sag

• Control-voltage sags of less than 3line cycles for any magnitude sag

• Control-voltage sags of 40 percent orless for any amount of time

• Second-order or lower harmoniccontent on the line

The chiller may shut down under thefollowing conditions:

• Line-voltage sags of 1.5 or more linecycles for voltage dips of 30 percentor more

• Control-voltage sags of 3 or more linecycles for voltage dips of 40 percentor more

• Third-order or higher harmoniccontent on the line

Current Overload ProtectionThe control panel will monitor thecurrent drawn by each line of the motorand shut the chiller off when thehighest of the three line currentsexceeds the trip curve. A manual resetdiagnostic describing the failure will bedisplayed. The current overloadprotection does not prohibit the chillerfrom reaching its full-load amperage.

The chiller protects itself from damagedue to current overload during startingand running modes, but is allowed toreach full-load amps.

High Motor-Winding TemperatureProtectionThis function monitors the motortemperature and terminates chilleroperation when the temperature isexcessive. The controller monitors eachof the three winding-temperaturesensors any time the controller ispowered up, and displays each of thetemperatures at the service menu.Immediately prior to start, and whilerunning, the controller will generate alatching diagnostic if the windingtemperature exceeds 265 ± 5°F(129.4 ± 2.8°C).

Surge Detection ProtectionSurge detection is based on currentfluctuations in one of three phases. Thedefault detection criterion is twooccurrences of RMS current change of30 percent within 0.8 seconds in 60 + 10percent seconds. With the Tracerchiller controller, the detection criterionis adjustable.

Overvoltage and UndervoltageProtectionThe unit will be shut down with anautomatic reset if the line voltage isbelow or above 10 percent of nominal.

Must trip = 15 percent of nominal.

Time to trip = minimum of 1 minute, 10seconds and maximum of 5 minutes,20 seconds. Overvoltage andundervoltage protection can bedisabled using TechView.

Power Factor and kW MeasurementThree-phase measurement of kW andunadjusted power factor yields higheraccuracy during power imbalanceconditions than with CH530.

Short-Cycling ProtectionShort-cycling protection is based on astart-to-start time. This method uses astraight start-to-start timer to determinewhen to allow the next start.

A ’Restart Inhibit Start-to-Start Time’setpoint is used to set the desired start-to-start time. There is no ’free’ start ona power up at DynaView. The real-timeclock is used to determine when thenext start will be allowed, based on theprevious start.

When the start is inhibited by therestart-inhibit function, the timeremaining is displayed along with therestart-inhibit mode.

CTV-PRC001-GB1 8

Figure PD-2 – Model CVGF Cooling Only Without UnitMounted Starter (for Remote Mounted Starter)

Figure PD-1 – Model CVGF Cooling OnlyWith Unit Mounted Starter

PhysicalDimensions

50 and 60 Hz SI(English Units)

Dimensions – SI Units (English Units)Clearance Unit Dimensions Unit DimensionsTube Pull With Unit Mounted Starters Without Unit Mounted Starters

Comp. Shell Size CL1 CL2 Length Height Width Width400-500 500 4235 mm 1118 mm 4083 mm 2094 mm 1984 mm 1929 mm

(13’ 10 3/4”) (3’ 8”) (13’ 4 3/4”) (6’ 101/2”) (6’ 6 1/8”) (6’ 3 15/16”)500 700 4235 mm 1850 mm 4083 mm 2200 mm 2038 mm 1988 mm

(13’ 10 3/4”) (3’ 11”) (13’ 4 3/4”) (7’ 2 5/8”) (6’ 8 1/4”) (6’ 6 1/4”)650 700 4235 mm 1850 mm 4083 mm 2270 mm 2083 mm 2076 mm

(13’ 10 3/4”) (3’ 11”) (13’ 4 3/4”) (7’ 5 3/8”) (6’ 10”) (6’ 9 3/4”)800-1000 1000 4235 mm 1219 mm 4083 mm 2521 mm 2305 mm 2257 mm

(13’ 10 3/4”) (4’) (13’ 4 3/4”) (8’3 1/4”) (7’6 3/4”) (7’ 4 7/8”)CL1 at either end of machine and is required for tube pull clearance.CL2 is always at the opposite end of machine from CL1 and is for water box plus clearance.– Recommended clearance (D1) for machine with unit mounted starter is 914 mm (36”)– Recommended clearance (D2) for machine without unit mounted starter is 1219 mm (38”)Unit length is not included for the waterbox.See page 19 for waterbox dimension

HEIGHT

WIDTH

914 mm (36”)RECOMMENDED

CLEARANCE

457 mm (18')RECOMMENDED

CLEARANCE

LENGTH

914 mm (36”)RECOMMENDED

CLEARANCE

HEIGHT

WIDTH

1 9CTV-PRC001-GB

PhysicalDimensions

Evaporator Water Box Length — SI (English)Length

No. mm (in)Shell Pressure Evap. Passes Supply Return500 10 bar (150 psig) NMAR 2 371 (14.61) 156 (6.14)

10 bar (150 psig) NMAR 3 371 (14.61) 371 (14.61)700 10 bar (150 psig) NMAR 2 489 (19.25) 235 (9.25)


10 bar (150 psig) NMAR 3 530 (20.87) 530 (20.87)

Condenser Water Box Length — SI (English)Length

No. mm (in)Shell Pressure Evap. Passes Supply Return500 10 bar (150 psig) NMAR 2 483 (19.02) 200 (7.87)



10 bar (150 psig) NMAR 2 632 (24.88) 276 (10.87)

Model CVGF Water Connection Pipe SizeShell Size

500 700 1000Water Passes Metric Pipe Size (mm) DNEvaporator

2 Pass DN 200 (8”) DN 250 (10”) DN 300 (12”)3 Pass DN 200 (8”) DN 200 (8”) DN 250 (10”)

Condenser2 Pass DN 250 (10”) DN 300 (12”) DN 350 (14”)

CTV-PRC001-GB2 0

The Trane CVGF packaged centrifugalwater chillers using HFC-134arefrigerant consist of a hermetic twostage, gear-drive centrifugalcompressor, evaporator, condenser,interstage economizer, unit-mountedmicroprocessor based control paneland compressor motor starter. Thechiller is completely factory assembled.

CompressorTwo-stage centrifugal compressor withhigh-strength aluminum alloy fullyshrouded impellers. The impellers aretested at 25 percent over designoperating speed. The rotatingassembly is dynamically balanced forvibration of less than 5.1 mm/s (0.2 ipspeak velocities) at nominal operatingspeeds. The control system affords100 - 20 percent capacity modulationby electrically actuated guide vanesupstream of each impeller.

Drive TrainThe drive train consists of helical bulland pinion gears. Gear tooth surfacesare case hardened and precisionground. The one-piece impeller shaft issupported by hydrodynamic thrust andradial bearings.

MotorThe motor is a hermetic, liquidrefrigerant cooled, two-pole, low-slipsquirrel cage induction motor. A radialhydrodynamic bearing and duplexangular contact ball bearings supportthe rotor assembly. Winding-embedded sensors provide positivethermal protection.

Lubrication SystemThe lubrication system consists of aninternal oil sump with heaters, positivedisplacement oil pump, brazed platecondenser-cooled oil cooler, and oildistillation/return line.

Economizer/OrificeThe economizer consists of a carbonsteel shell with internal componentsdesigned to prevent liquid carryover tothe compressor. Liquid refrigerant isadmitted through a single calibratedorifice (no moving parts) whichmaintains a pressure differentialbetween condenser and economizer.

EvaporatorThe evaporator is designed, tested andstamped in accordance with ASMEBoiler and Pressure Vessel Code or PED(European Code) for refrigerant sideworking pressure of 15.2 bars (220psig). It consists of a carbon steel shell

MechanicalSpecifications

with steel tube sheets welded to eachend. Intermediate tube support sheetspositioned along the shell axis preventrelative tube motion. Individuallyreplaceable externally finned andinternally grooved 19 mm (¾ in.) and25.4 mm (1.0 in.) nominal diameterseamless copper tubes aremechanically expanded into tubesheets.

Two or three pass water boxes rated at10.5 bar (150 psi) is standard. Groovedpipe stubs for Victaulic couplings arestandard; flanged connections areoptionally available. The waterside ishydrostatically tested at 1.5 timesmaximum working pressure.

Liquid refrigerant is admitted to theevaporator through a single calibratedorifice (no moving parts) whichmaintains a pressure differentialbetween the economizer and theevaporator.

CondenserThe condenser is designed, tested andstamped in accordance with the ASMEBoiler and Pressure Vessel Code or PED(European Code) for a refrigerant sideworking pressure of 15.2 bars (220psig). It consists of a carbon steel shellwith steel tube sheets welded to eachend. Individually replaceable, externallyfinned and internally grooved 19 mm(¾ in.) and 25.4 mm (1.0 in.) nominaldiameter seamless copper tubes aremechanically expanded into the tubesheets.

2 1CTV-PRC001-GB

Welded steel two pass water boxes arebolted to the tube sheets. Waterconnections are steel pipe stubsgrooved for Victaulic couplings; flangedconnections are optionally available.Maximum waterside working pressureof 10.5 bars (150 psi) is standard. Thewaterside is hydrostatically tested at 1.5times maximum working pressure.

Unit Control PanelThe Tracer™ CH.530 is amicroprocessor-based chiller controllerthat provides complete stand alonesystem control for water-cooledcentrifugals. It is a factory-mountedpackaged and tested on the CVGF unit.All controls necessary for the safe andreliable operation of the chiller areprovided including oil management,interface to the starter, and three phasemotor overload protection. It alsoincludes comprehensive status anddiagnostic monitoring controls. Acontrol power transformer included inthe starter panel powers the controlsystem.

The microprocessor controller iscompatible with reduced voltage or fullvoltage electro-mechanical starters,and solid state starter. Starter forEurope with the CE mark is available.

The microcomputer control systemprocesses the leaving evaporator fluidtemperature sensor signal to satisfy thesystem requirements across the entireload range.

The controller will load and unload thechiller via control of the stepper- motor/actuator which drives the inlet guidevanes open and closed. The load rangecan be limited either by a control limitfunction such as motor current, lowevaporator temperature or highcondenser pressure limit or by an inletguide vane limit (whichever comesfirst). It will also control the evaporatorand condenser pumps to insure properchiller operation.

Status and 10 active diagnostics arecommunicated to the operator viadisplay with a tabbed navigationsystem. Setpoints are entered throughthe touch-sensitive screen. Countdowntimer displays remaining time(s) duringwait states and time out periods.Nonvolatile memory saves unit set-upinformation during power loss withoutthe need for batteries. Passwordprotection is provided to secure theoperator interface. PC-based servicetool software displays the last 60 activeor 60 historic diagnostics, indicating thetime, date of occurrence, and systemparameters at the time of the diagnostic.

The service tool provides advancedtroubleshooting and access tosophisticated configuration settings notneeded during operation of the chiller.Any PC that meets the installationrequirements may be loaded with theservice tool software via downloadfrom www.trane.com.

Unit mounted display is capable ofdisplaying chiller parameters in IP or SIunits, and language in English and any2 downloadable and/or locallytranslated languages.

Compressor Motor StarterUnit-mounted starters can either be astar-delta or solid state in NEMA1 typeenclosure wired to compressor motorup to 952 RLA at 380~480 volts (star-delta), 900 RLA at 481~600 Volts(star-delta), and 1472 RLA at 380~600volts (solid-state).

Remote-mounted starters can either bestar-delta or solid state for low voltage.Across-the-line, primary reactor, orauto transformer for medium and highvoltage. All in a NEMA 1 type enclosureup to 1402 RLA at 380~600 volts (star-delta), 1472 RLA at 380~600 volts(solid-state), and 360 RLA at 3300~6600volts (x-line, primary reactor, and auto-transformer).


CTV-PRC001-GB2 2

Unit-mounted or remote-mountedstarters for Europe (CE mark) will bestar-delta, solid-state, across-the-line,primary reactor, and auto transformeronly in a IP 20 enclosure.

A steel panel door with optionalmechanical interlock disconnects thesystem when the door is opened(required for CE listing). The panel alsocontains three-phase currenttransformer for overload protection,and an oil pump starter with overloads.The starter is factory mounted andwired to the compressor motor and thecontrol panel. The CVGF chiller/starterassembly is factory tested.

Optional remote mountedelectromechanical starters areavailable.

Isolation PadsMolded neoprene isolation pads aresupplied with each chiller forplacement under all support points.Spring isolators are optionallyavailable.

Refrigerant and Oil ChargeA full charge of oil is supplied with eachunit. The oil ships in the unit’s sumpand the refrigerant ships directly to thejobsite from refrigerant suppliers.

PaintingAll painted CVGF surfaces are coatedwith two coats of air-dry beige primer-finisher prior to shipment.

InsulationThe chiller can be ordered with orwithout factory applied insulation.Factory supplied insulation is applied to

all low temperature surfaces includingthe evaporator, water boxes andsuction elbow. Insulation material is 19mm (¾ in.) Armaflex II or equal(thermal conductivity = 0.04 W/m·°C;0.3 Btu·in/h·ft²·°F). The oil sump isinsulated with 9.5 mm (3/8 in.) and13 mm (½ in.) insulation respectively.

RiggingEvaporator and condenser tube sheetsprovide rigging support points. Arigging diagram is affixed to the chiller.

QualityThe La Crosse chiller manufacturingfacility is ISO 9001.


2 3CTV-PRC001-GB

ConversionTable

To Convert From: To: Mulgpiy By:Length Feet (ft) meters (m) 0.30481Inches (In) millimeters (mm) 25.4ArcaSquare Feet (ft2) square meters (m2) 0.093Square Inches (In2) square millimeters (mm2) 645.2Volume Cubic Feet (ft3) Cubic meters (m2) 0.0283Cubic Inches (In3) Cubic mm (mm3) 16387Gallons (gal) litres (l) 3.785Gallons (gal) cubic meters (m3) 0.003785Flow Cubic feet/min (cfm) cubic meters/second (m3/s) 0.000472Cubic Feet/min (cfm) cubic meters/hr (m3/hr) 1.69884Gallons/minute (GPM) cubic meters/hr (m3/hr) 0.2271Gallons/minute (GPM) Iitres/second (Vs) 0.06308Velocrty Feet per minute (ft/m) meters per second (m/s) 0.00508Feet per second (ft/s) meters per second (m/s) 0.3048

To Convert From: To: Multiply By:Energy and Power and CapacltyBritish Thermal Units (BTUH) KilowattIkW) 0.000293British Thermal Units (BTU) KCalorie (Kcal) 0.252Tons (refrig. effect) Kilowatt (refrig. effect) 3.516Tons (refrig. effect) Kilocalories per hour (Kcal/hr) 3024Horsepower Kilowatt(kW) 0.7457PressureFeet of water (ftH2O) Pascals (PA) 2990Inches of water (inH2O) Pascals (PA) 249Pounds per square inch (PSI) Pascals (PA) 689PSI Bar or KG/CM2 6.895 x 10-2

WeightOunches (oz) Kilograms (kg) 0.02835Pounds (lbs) Kilograms (Kg) 0.4536Fouling factors for heat exchanges0.00075 ft2 °F hr/BTU = 0.132 m2 K/kM0.00025 ft2 °F hr/BTU = 0.044 m2 K/kW

Temperature - Centigrade (°C) Versus Fahrenheit (°F)Note: The center columns of numbers, referred to as BASE TEMP, is the temperature in either degrees Fahrenheit (°F) or Centigrade (°C), whichever is desiredto convert into the other. If degrees Centrigrade is given, read degrees Fahrenheit to the right. If degrees Fahrenheit is given, read degrees Centigrade to the left.

Temperature

°C C or F °F

- 15.0 + 5 + 41.0- 14.4 + 6 + 42.8- 13.9 + 7 + 44.6- 13.3 + 8 + 46.4- 12.8 + 9 + 48.2

- 12.2 + 10 + 50.0- 11.7 + 11 + 51.8- 11.1 + 12 + 53.6- 10.6 + 13 + 55.4- 10.0 + 14 + 57.2

- 9.4 + 15 + 59.0- 8.9 + 16 + 60.8- 8.3 + 17 + 62.6- 7.8 + 18 + 64.4- 7.2 + 19 + 66.2

- 6.7 + 20 + 68.0- 6.1 + 21 + 69.8- 5.5 + 22 + 71.6- 5.0 + 23 + 734- 4.4 + 24 + 75.2

- 3.9 + 25 + 77.0- 3.3 + 26 + 78.8- 2.8 + 27 + 80.6- 2.2 + 29 + 82.4- 1.7 + 29 + 84.2

- 1.1 + 30 + 86.0- 0.6 + 31 + 87.80.0 + 32 + 89.6

+ 0.6 + 33 + 91.4+ 1.1 + 34 + 93.2

+ 1.7 + 35 + 95.0+ 2.2 + 36 + 96.8+ 2.8 + 37 + 98.6+ 3.3 + 38 + 100.4+ 3.9 + 39 + 102.2

+ 4.4 + 40 + 104.0+ 5.0 + 41 + 105.8+ 5.5 + 42 + 107.6+ 6.1 + 43 + 109.4+ 6.7 + 44 + 111.2

+ 7.2 + 45 + 113.0+ 7.8 + 46 + 114.8+ 8.3 + 47 + 116.6+ 8.9 + 48 + 118.4+ 9.4 + 49 + 120.2

Temperature

°C C or F °F

- 40.0 - 40 - 40.0- 39.4 - 39 - 38.2- 38.9 - 38 - 36.4- 38.3 - 37 - 34.6- 37.8 - 36 - 32.8

- 37.2 - 35 - 31.0- 36.7 - 34 - 29.2- 36.1 - 33 - 27.4- 35.6 - 32 - 25.6- 35.0 - 31 - 23.8

- 34.4 - 30 - 22.0- 33.9 - 29 - 20.2- 33.3 - 28 - 18.4- 32.8 - 27 - 16.6- 32.2 - 26 - 14.8

- 31.7 - 25 - 13.0- 31.1 - 24 - 11.2- 30.6 - 23 - 9.4- 30.0 - 22 - 7.6- 29.4 - 21 - 5.8

- 28.9 - 20 - 4.0- 28.3 - 19 - 2.2- 27.8 - 18 - 0.4- 27.2 - 17 + 1.4- 26.7 - 16 + 3.2

- 26.1 - 15 + 5.0- 25.6 - 14 + 6.8- 25.0 - 13 + 8.6- 24.4 - 12 + 10.4- 23.9 - 11 + 12.2

- 23.3 - 10 + 14.0- 22.8 - 9 + 15.8- 22.2 - 8 + 17.6- 21.7 - 7 + 19.4- 21.1 - 6 + 21.2

- 20.6 - 5 + 23.0- 20.0 - 4 + 24.8- 19.4 - 3 + 26.6- 18.9 - 2 + 28.4- 18.3 - 1 + 30.2

- 17.8 0 + 32.0- 17.2 + 1 + 33.8- 16.7 + 2 + 35.6- 16.1 + 3 + 37.4- 15.6 + 4 + 39.2

Temperature

°C C or F °F

+ 10.0 + 50 + 122.0+ 10.6 + 51 + 123.8+ 11.1 + 52 + 125.6+ 11.7 + 53 + 127.4+ 12.2 + 54 + 129.2

+ 12.8 + 55 + 131.0+ 13.3 + 56 + 132.8+ 13.9 + 57 + 134.6+ 14.4 + 58 + 136.4+ 15.0 + 59 + 138.2

+ 15.6 + 60 + 140.0+ 16.1 + 61 + 141.8+ 16.7 + 62 + 143.6+ 17.2 + 63 + 145.4+ 17.8 + 64 + 147.2

+ 18.3 + 65 + 149.0+ 18.9 + 66 + 150.8+ 19.4 + 67 + 152.6+ 20.0 + 68 + 154.4+ 20.6 + 69 + 156.2

+ 21.1 + 70 + 158.0+ 21.7 + 71 + 159.8+ 22.2 + 72 + 161.6+ 22.8 + 73 + 163.4+ 23.3 + 74 + 165.2

+ 23.9 + 75 + 167.0+ 24.4 + 76 + 168.8+ 25.0 + 77 + 170.6+ 25.6 + 78 + 172.4+ 26.1 + 79 + 174.2

+ 26.7 + 80 + 176.0+ 27.2 + 81 + 177.8+ 27.8 + 82 + 179.6+ 28.3 + 83 + 181.4+ 28.9 + 84 + 183.2

+ 29.4 + 85 + 185.0+ 30.0 + 86 + 186.8+ 30.6 + 87 + 188.6+ 31.1 + 88 + 199.4+ 31.7 + 89 + 192.2

+ 32.2 + 90 + 194.0+ 32.8 + 91 + 195.8+ 33.3 + 92 + 197.6+ 33.9 + 93 + 199.4+ 34.4 + 94 + 201.2

Temperature

°C C or F °F

+ 35.0 + 95 + 203.0+ 35.6 + 96 + 204.8+ 36.1 + 97 + 206.6+ 36.7 + 98 + 208.4+ 37.2 + 99 + 210.2

+ 37.8 + 100 + 212.0+ 38.3 + 101 + 213.8+ 38.9 + 102 + 215.6+ 39.4 + 103 + 217.4+ 40.0 + 104 + 219.2

+ 40.6 + 105 + 221.0+ 41.1 + 106 + 222.8+ 41.7 + 107 + 224.6+ 42.2 + 108 + 226,4+ 42.8 + 109 + 228.2

+ 43.3 + 110 + 230.0+ 43.9 + 111 + 231.8+ 44.4 + 112 + 233.6+ 45.0 + 113 + 235.4+ 45.6 + 114 + 237.2

+ 46.1 + 115 + 239.0+ 46.7 + 116 + 240.8+ 47.2 + 117 + 242.6+ 47.8 + 118 + 244.4+ 48.3 + 119 + 246.2

+ 48.9 + 120 + 248.0+ 49.4 + 121 + 249.8+ 50.0 + 122 + 251.6+ 50.6 + 123 + 253.4+ 51.1 + 124 + 255.2

+ 51.7 + 125 + 257.0+ 52.2 + 126 + 258.8+ 52.8 + 127 + 260.6+ 53.3 + 128 + 262.4+ 53.9 + 129 + 264.2

+ 54.4 + 130 + 266.0+ 55.0 + 131 + 267.8+ 55.6 + 132 + 269.6+ 56.1 + 133 + 271.4+ 56.7 + 134 + 273.2

+ 57.2 + 135 + 275.0+ 57.8 + 136 + 276.8+ 58.3 + 137 + 278.6+ 58.9 + 138 + 280.4+ 59.4 + 139 + 282.2

Temperature

°C C or F °F

+ 60.0 + 140 + 284.0+ 60.6 + 141 + 285.8+ 61.1 + 142 + 287.6+ 61.7 + 143 + 289.4+ 62.2 + 144 + 291.2

+ 62.8 + 145 + 293.0+ 63.3 + 146 + 294.8+ 63.9 + 147 + 296.6+ 64.4 + 148 + 298.4+ 65.0 + 149 + 300.2

+ 65.6 + 150 + 302.0+ 66.1 + 151 + 303.8+ 66.7 + 152 + 305.6+ 67.2 + 153 + 307.4+ 67.8 + 154 + 309.2

+ 68.3 + 155 + 311.0+ 68.9 + 156 + 312.8+ 69.4 + 157 + 314.6+ 70.0 + 158 + 316.4+ 70.6 + 159 + 318.2

+ 71.1 + 160 + 320.0+ 71.7 + 161 + 321.8+ 72.2 + 162 + 323.6+ 72.8 + 163 + 325.4+ 73.3 + 164 + 327.2

+ 73.9 + 165 + 329.0+ 74.4 + 166 + 330.8+ 75.0 + 167 + 332.6+ 75.6 + 168 + 334.4+ 76.1 + 169 + 336.2

+ 76.7 + 170 + 338.0+ 77.2 + 171 + 339.8+ 77.8 + 172 + 341.6+ 78.3 + 173 + 343.4+ 78.9 + 174 + 345.2

+ 79.4 + 175 + 347.0+ 80.0 + 176 + 348.8+ 80.6 + 177 + 350.6+ 81.1 + 178 + 352.4+ 81.7 + 179 + 354.2

+ 82.2 + 180 + 356.0+ 82.8 + 181 + 357.8+ 83.3 + 182 + 359.8+ 83.9 + 183 + 361,4+ 84.4 + 184 + 363.2

FOR INTERPOLATION IN THE ABOVE TABLE USE:BASE TEMPERATURE (°F or °C) 1 2 3 4 5 6 7 8 9 10DEGREES CENTIGRADE: 0.56 1.11 1.67 2.22 2.78 3.33 3.89 4.44 5.00 5.56DEGREES FAHRENHEIT: 1.8 3.6 5.4 7.2 9.0 10.8 12.6 14.4 16.2 18.0

www.trane.com

For more information, contact your local districtoffice or e-mail us at [email protected]

Trane has a policy of continuous product and product data improvement and reserves the right to changedesign and specifications without notice. Only qualified technicians should perform the installation andservicing of equipment referred to in this publication.

American Standard Europe BVBARegistered Office: 1789 Chaussée de Wavre, 1160 Brussels - Belgium

Literature Order Number

File Number

Supersedes

Literature Stocking Location

CTV-PRC001-GB

PL-RF-CTV-000-PRC001-0904

CTV-PRC001-GB 103

Europe

Documents

Centrifugal Water Chillers · Touch sensitive screen provides information and navigation at the same time Change setpoints and settings with touch screen commands Displays chiller