Split System Condensing Units and Remote Chillers

1 Split System CondensingUnits and Remote Chillers20 to 120 Tons50 and 60 HzSS-PRC005-ENNovember 2006 2002 American Standard Inc. All rights reservedSS-PRC005-ENIntroductionTrane 20 through 120-ton air-cooledcondensing Units are the leaders in thesplit System marketplace. Designed forefficiency, reliability and flexibility, theTrane Units have the most advanceddesign in the through 120-ton Units featurethe Trane 3-D scroll compressor, solid-state controls and Trane s exclusivePacked Stock Plus availability for quickshipment. These innovations make analready proven product even better!3 ContentsSS-PRC005-ENIntroductionFeatures and BenefitsApplication ConsiderationsSelection ProcedureModel Number DescriptionGeneral DataPerformance DataPerformance Adjustment FactorsControlsElectric PowerDimension and WeightsMechanical Specifications2467810121125272946SS-PRC0 05-EN4 Features andBenefitsTrane 3-D scroll CompressorSimple Design with 70% Fewer PartsFewer parts than an equal capacityreciprocating compressor meanssignificant reliability and efficiencybenefits.

2 The single orbiting scrolleliminates the need for pistons,connecting rods, wrist pins and parts lead to increased moving parts, less rotating massand less internal friction means greaterefficiency than Trane 3-D scroll provides importantreliability and efficiency benefits. The 3-DScroll allows the orbiting scrolls to touchin all three dimensions, forming acompletely enclosed compressionchamber which leads to increasedefficiency. In addition, the orbiting scrollsonly touch with enough force to create aseal; there is no wear between the scrollplates. The fixed and orbiting scrolls aremade of high strength cast iron whichresults in less thermal distortion, lessleakage, and higher efficiencies.

3 Themost outstanding feature of the 3-DScroll compressor is that slugging willnot cause failure. In a reciprocatingcompressor, however, the liquid or dirtcan cause serious Torque VariationThe 3-D scroll compressor has a verysmooth compression cycle; torquevariations are only 30 percent of thatproduced by a reciprocating means that the scroll compressorimposes very little stress on the motorresulting in greater reliability. Low torquevariation reduces noise and Gas cooled MotorCompressor motor efficiency andreliability is further optimized with thelatest scroll design. Cool suction gaskeeps the motor cooler for longer lifeand better Design Through Testing andResearchWith over twenty years of developmentand testing, Trane 3-D Scrollcompressors have undergone morethan 400,000 hours of laboratory testingand field operation.

4 This work combinedwith over 25 patents makes Trane theworldwide leader in air conditioningscroll compressor Power Supply20 through 120-ton Units have fourvoltage options in 200, 230, 460 and575, resulting in improved ManifoldingTrane offers a parallel manifoldingscheme that uses no movingmechanical parts. This feature assurescontinuous oil return, again providinggreater System reliability. And greaterreliability means optimal performanceover the life of the Control OptionsTrane offers four System controloptions on 20 through 60-ton Units andthree System control options on the 80through 120-ton Units , each usingsolid- state electronics. These optionsallow the unit to be ordered only withthe controls needed.

5 In addition, theycome factory installed, saving fieldinstallation Frost ProtectionTrane offers FROSTAT with the VAVsystem control option on the 20through 120-ton Units . FROSTAT is theindustry s most reliable method of coilfrost protection and assures that yoursystem will provide energy efficientcomfort at part load Evaporative Liquid chiller (EVP/STX) Control OptionThis option allows chilled water to begenerated remotely from thecondensing andBenefitsPacked Stock PlusTrane 20 through 120-ton air-cooledcondensing Units are available throughthe most flexible packed stock programin the industry. Trane knows that youwant your Units on the job site, on time,with the options you Stock Plus provides you with thecontrols and options you need optionslike hot gas bypass, isolators andrefrigerant gauges.

6 You no longer have tosettle for a basic unit requiring many fieldinstalled options to meet your jobschedule. Now, you can get a customizedunit from the factory in record Trane Packed Stock Plus programprovides more control over unit selectionand scheduling than ever before. Tranewants to make it easy for you to dobusiness with Through 60-Ton UnitsStandard Features Trane 3-D scroll compressors Factory-installed Discharge and LiquidLine Service Valves Passive manifolding for 3-D Scrollcompressors Standard ambient operating range40 F to 115 F 14-gauge galvanized steel frame Louvered panels for coil protection Slate gray air-dry paint finish (exceeds672 hour salt spray test in accordancewith ASTM B117)

7 Optional Features Non-fused disconnect Low ambient option Hot gas bypass to the evaporator inlet Suction service valve Pressure gauges Return air sensor Copper finned condenser coil Flow switch unit spring isolators Neoprene-in-shear isolators UL/CSA approval (not available for 50Hz) Packed Stock Plus program Extended Compressor Warranty Special coil coating for corrosionresistance Four systems control options80 Through 120-Ton UnitsStandard Features Trane 3-D scroll compressors Factory-installed discharge and liquidline service valves Standard ambient operating range 40 Fto 115 F Independent refrigerant circuits 14-gauge galvanized steel frame Louvered panels for coil protection Slate gray air-dry paint finish (exceeds672 hour salt spray test in accordancewith ASTM B117)

8 Optional Features Low ambient option Hot gas bypass to the evaporator inlet Suction service valve Pressure gauges Copper finned condenser coil Spring isolators Flow switch UL/CSA approval Packed Stock Plus Availability Extended Compressor Warranty Special coil coating for corrosionresistance Three System control optionsSS-PRC005-EN6 ApplicationConsiderationscapacity and efficiency. The adjustmentfactors in Table PAF-1 can be applieddirectly to the catalog performance datato determine the unit s ConsiderationsStart-up and operation at lowerambients requires sufficient headpressure be maintained for properexpansion valve operation. At higherambients, excessive head pressure mayresult.

9 Standard operating conditions are40 F to 115 F. With a low ambientdamper, operation down to 0 F ispossible. Minimum ambienttemperatures are based on stillconditions (winds not exceeding fivemph). Greater wind velocities will resultin increased minimum operatingambients. Units with hot gas bypasshave a minimum operating ambienttemperature of 10 F. For properoperation outside theserecommendations, contact the localTrane sales Frost ProtectionFROSTAT is standard on condensingunits when the VAV option is consists of a ship-withthermostat for field installation on thesuction line. A timer is also factory-installed to avoid short cycling. FROSTAT cycles the compressor off when thesuction line is below 30 F.

10 Refer toS/S-EB-43 for more hot gas valves must be used on 20to 120-ton Units , they can be ordered asa miscellaneous option. 20 to 30-tonunits require one valve; 40 to 60-tonunits also require one valve except whenno System control option is selected; thisoption requires two valves. 80 to 120-tonunits require one valve when Supply AirVAV control is selected. Two valves arerequired on all other 80 to 120-toncontrol PipingSpecial consideration must always begiven to oil return. Minimum suction gasvelocities must always be maintained forproper oil return. Utilize appropriatepiping tools for line sizing such as theCDS Refrigerant Piping Program. Forspecial applications, call ClarksvilleProduct also allow for control paneldoor swing and rountine maintenancerequirements.