Air-Cooled Condensers - Trane

1 Air-CooledCondensers20 to 120 TonsACDS-PRC001-ENApril 2001 American Standard Inc. 2001 ACDS-PRC001-ENIntroductionAir- cooled CondensersBuilt for Every NeedTrane has the right you aredesigning a new system or replacing anexisting Air-Cooled condenser, Trane cansatisfy virtually any application coupled with an industrialcompressor, a single zone commercialself-contained unit, compressor chilleror a Cold Generator chiller, Trane hasthe right Air-Cooled condenser for thejob. When teamed with any one of awide range of compressor-evaporatorcombinations, Trane air-cooledcondensers, available in 20 to 120 tons,are ideal for multistory office buildings,hotels, schools, municipal andindustrial and BenefitsApplication ConsiderationsSelection ProcedureModel Number DescriptionGeneral DataPerformance DataPerformance Adjustment FactorsElectric PowerDimension and WeightsMechanical Specifications2456891110121323 ACDS-PRC001-EN4 Features andBenefits20 to 120 Ton UnitsTrane 20 to 120 ton air-cooledcondensers have an operating range of40 F to 115 F.

2 With a low ambient optiondown to 0 control panel is factory-installedand wired to prevent potential damageand to provide weathertight control panel contains: fan motor contactors. fan cycling controls. terminal point connection forcompressor interlock. 115-volt control power standard features reduceinstallation costs and provide easyinterface with control Trane Air-Cooled condenser coils aretube-in-sheet construction with coppertubing mechanically bonded toconfigurated aluminum fins. 20 to 30ton Condensers are single circuit; 40 to120 ton units are dual circuited; allfeature integral coils are ConstructionTrane 20 to 120 ton Condensers arebuilt for long life.

3 The unit frame isconstructed of 14 gauge galvanizedsteel. Louvered panels provideexcellent coil protection whileenhancing unit appearance andstrength. The unit surface isphosphatized and finished with TraneSlate Grey air-dry paint. This air dry-paint finish exceeds 500 consecutivehour salt spray resistance inaccordance with ASTM application constraints should beconsidered when sizing, selecting, andinstalling Air-Cooled Condensers . Unitand system reliability depends onproperly and completely acknowledgingthese considerations. Consult your localTrane sales engineer if your applicationvaries from these the UnitA base or foundation is not required ifthe selected unit location is level andstrong enough to support the operatingweight.

4 Refer to the Weights section forthe weight of individual and Sound EmissionThe most effective method of noiseisolation is proper unit location. Unitsshould be placed away from noisesensitive areas. Structurally transmittednoise can be reduced with the use ofspring isolators and they arerecommended for acoustically sensitiveapplications. Flexible electrical conduit,for maximum isolation effectiveness, willApplicationConsiderationsreduce sound transmitted throughelectrical and local codes on soundemissions should always beconsidered. Since the environment inwhich a sound source is located affectssound pressure, unit placement mustbe carefully minimum spaceenvelopes for servicing are located inthe Dimensional Data section andserve as guidelines for providingadequate clearance.

5 The minimumspace envelopes also allow for controlpanel door swing and routinemaintenance LocationUnobstructed flow of condenser air isessential to maintaining capacity andoperating efficiency. When determiningunit placement, careful considerationmust be given to assure a sufficient flowof air across the condenser heat transfersurface. Two detrimental conditions arepossible and must be avoided: Warm airrecirculation and coil air recirculation occurs whendischarge air from the condenser fans isrecycled back at the condenser coil starvation occurs when free airflowto the condenser is warm air recirculation and coilstarvation cause reductions in unitefficiency and capacity because of thehigher head pressures associated withthem.

6 In more severe cases, nuisanceunit shutdowns will result fromexcessive head winds, those perpendicular to thecondenser, tend to aid efficient operationin warmer ambient , they tend to be detrimental tooperation in lower ambients or when hotgas bypass is used due to theaccompanying loss of adequate headpressure. As a result, it is advisable toprotect Air-Cooled Condensers fromcontinuous direct winds exceeding 10miles per , trash, supplies, etc., should notbe allowed to accumulate in the vicinityof the Air-Cooled condenser. Supply airmovement may draw debris into thecondenser coil, blocking spaces betweencoil fins and causing coil consideration should be given tolow ambient units.

7 Condenser coils andfan discharge must be kept free of snowor other obstructions to permitadequate airflow for satisfactory condenser air discharge must beunobstructed. While it is difficult topredict the degree of warm airrecirculation, a unit installed with aceiling or other obstruction above it willlose capacity and the maximum ambientoperation will be reduced. Nuisancehigh head pressure tripouts may inlet to the coil must also beunobstructed. A unit installed closerthan the minimum recommendeddistance to a wall or other vertical risermay experience a combination of coilstarvation and warm air recirculation,resulting in unit capacity and efficiencyreductions, as well as possible excessivehead pressures.

8 The recommendedlateral distances are listed in theDimensional Data voltage is the nameplate ratingvoltage. The actual range of line voltagesat which the equipment cansatisfactorily operate is given below:NominalVoltageVoltageUtilization Range200/220180-220 or 208-254460416-508575520-635200/230-volt units ship from the factoryset for operation in the 180 through 220-volt range. By changing leads on unittransformers, the unit will operate in the208 through 254-volt of AltitudeThe tables in the Performance Datasection are for use at sea level. Atelevations substantially above sea level,the decreased air density will decreasecondenser capacity.

9 Refer to thePerformance Adjustment Factors sectionto correct performance at other LimitationsTrane Condensers are designed for year-around applications in ambients from 0 Fthrough 115 F. For operation below 0 F orabove 115 F, contact the local Trane and operation of Tranecondensers at lower ambienttemperatures require that sufficient headpressure be maintained for properoperation. Minimum operating ambienttemperatures for standard unitselections and units with hot gas bypassare shown in the General Data temperatures are based on stillconditions (winds not exceeding fivemph.) Greater wind velocities will resultin a drop in head pressure, therefore,increasing the minimum starting andoperating ambient with the low ambient option arecapable of starting and operating inambients down to 0 F, 10 F with hot gasbypass.

10 Optional low ambient units usea condenser fan damper arrangementthat controls condenser capacity bymodulating in response to cataloged ambienttemperature operation of a standardcondenser is 115 F. Operation at designambients above 115 F can result inexcessive head pressures. For operationabove 115 F, contact the local Trane the results from the compressorand condenser plots to Chart SP-1 and dothe following. Draw a line through thetwo points representing gross heatcompressor capacities less subcooling( and ). Draw a line through thetwo points representing condenser grossheat of rejection ( and ).dAt the point of intersection of thecompressor and condenser lines drawdashed lines to the left and bottommargins of Chart SP-1.