Packaged Heat Pumps - Trane

1 Packaged heat PumpsPrecedent 3-10 Tons - 60 HzPKGP-PRC003-ENOctober 20011st Reprint November 2001 2002 American Standard Inc. All Rights ReservedPKGP-PRC003-ENIntroductionPreced entTM .. The same with added is a flexible line of packagedunits that cover a wide variety utilizes the sophisticatedReliaTel microprocessor controls. Inaddition to controls, Precedent offersmany other outstanding features andoption its sleek compact cabinet, roundedcorners and beveled top, it may just bethe most aesthetically pleasing packagedunit on the planet. And, of course,Precedent carries the Trane reputation forexcellence, quality and reliability. It shard to stop a simple applications, to the mostcomplex, Precedent has the and BenefitsApplication ConsiderationsSelection ProcedureModel Number DescriptionGeneral DataPerformance DataCooling PerformanceFan PerformanceHeat PerformanceControlsElectric PowerDimension and WeightsMechanical Specifications24910111215151827343543514 PKGP-PRC003-ENFeatures andBenefitsUnit CabinetThe compact cabinet with roundedcorners takes up less room and is lesscostly to ship.

2 The beveled and ribbedtop is not only aesthetically pleasing, it isdesigned to prevent water from poolingSingle Point PowerA single electrical connection powers contains the bestcompressor technology available toachieve the highest possibleperformance. Our compressor lineincludes Trane -built Climatuff reciprocating and Access PanelsEasy access panels reduce the number ofpossible water entry Ambient CoolingAll Precedent units have coolingcapabilities down to 0 F as two screws for access to thestandardized internal components BaseFor added water integrity, Precedent hasa raised 11/8" lip around the unit sdownflow supply and return to preventwater from blowing into the Drain PansEvery Precedent unit has a non-corrossive, removable, double-slopeddrain pan that s easy to clean andreversible to allow installation of draintrap on either side of the the Base CondensateEvery unit includes provisions forthrough the base condensate drainconnections.

3 This allows the drain to beconnected through the roof curb insteadof a roof InsulationAll panels in the Evaporator section ofthe unit have cleanable foil-facedinsulation. All edges are either capturedor sealed to ensure no fibers get into Units The units ship in a downflowconfiguration. They can be easilyconverted to horizontal by simplymoving two panels. Units come complete with horizontalduct flanges so the contractor doesn thave to field fabricate them. Theseduct flanges are a time and cost Idler ArmWith the Easy-Adjust Idler Arm, the beltand sheaves on belt drive units can bequickly adjusted without moving themounted fan motor. The result is a majorsavings in time and Condenser CoilPrecedent boasts a patented 1+1+1 Hybrid coil, permanently gapped foreasy And Numbered WiringYou save time and money tracing wiresand diagnosing the andBenefitsFlexible Applications Only two roof curbs for the 3-10 tonPrecedent line.

4 Simplifies curbselection. Airflow is outstanding. The Precedentcan replace an older machine with oldductwork and, in many cases, improvecomfort through better air distribution. Belt or direct drive standard oroversized supply fan motors meet awide airflow range. Precedent offers ultimate and components are not pre- Packaged at the factory. Units are builtto order in our standard shortest inthe industry ship cycle Components Components are placed in the samelocation on all Precedent yourself with one Precedentand you are familiar with Access Low Voltage Terminal BoardPrecedent s Low Voltage Terminal Boardis external to the electrical controlcabinet. It is extremely easy to locate andattach the thermostat wire. This isanother cost and time saving Voltage ConnectionsThe wiring of the low voltageconnections to the unit and the zonesensors is as simple as 1-1, 2-2, and simplified system makes it easy forthe installer to wireSingle-Side ServiceSingle-side service is standard on allPrecedent andBenefitsMicro ControlsSeveral years ago, Trane was the first tointroduce microprocessor controls intothe Light Commercial Market.

5 Thatdesign, along with immeasurableexperience, has provided the technologyfor Trane s second-generation ReliaTel microprocessor Micro: Provides unit control for heating,cooling, and ventilating by utilizinginput from sensors that measureoutdoor and indoor temperature. Improves quality and reliability throughthe use of time-tested microprocessorcontrols and logic. Prevents the unit from short cycling,considerably improving compressorlife. Ensures that the compressor will runfor a specific amount of time, whichallows oil to return for betterlubrication, enhancing the reliability ofthe compressor. Reduces the number of componentsrequired to operate the unit, therebyreducing possibilities for componentfailure. Eliminates the need for field-installedcomponents with its built-in anti-short-cycle timer, time delay relayand minimum on time controls are factory tested toassure proper operation. Requires no special tools to run thePrecedent unit through its pacesduring testing.

6 Simply place ajumper between Test 1 and Test 2terminals on the Low VoltageTerminal Board and the unit will walkthrough its operational steps. Theunit automatically returns control tothe zone sensor after steppingthrough the test mode a single time,even if the jumper is left on the unit. As long as the unit has power andthe LED is lit, the Micro isoperational. The light indicates thatthe Micro is functioning properly. Features expanded diagnosticcapabilities when used with Trane sIntegrated Comfort TM Systems. As an energy benefit, softenselectrical spikes by staging on fans,compressors and heaters. The Intelligent Fallback or AdaptiveControl is a benefit to the buildingoccupant. If a component goesastray, the unit will continue tooperate at predeterminedtemperature set points. Intelligent Anticipation is a standardfeature of the Micro. Functioningconstantly, the Micro and zonesensors work together in harmony toprovide tight comfort andBenefitsFactory-installed OptionsHinged Access DoorsThese doors permit easy access to thefilter, fan/ heat , and compressor/controlsections.

7 They reduce the potential roofdamage from screws or sharp accessdoor with either dry bulb, referenceor comparative enthalpy sensing, thisfeature provides free cooling as theoutdoor temperature and/or humiditydecreases. Economizers, correctlyinstalled, offer valuable energy economizers save timeand ensure proper the Base Electrical provided through the baseopenings simplify wiring and these utility openingsfrequently minimize the number of roofpenetrations, the integrity of roofingmaterials is Mounted Disconnect or CircuitBreakerCodes require a method of assured unitshutdown for servicing. Field-installeddisconnects sometimes interfere withservice access. Factory installation of unitdisconnects reduces costs, assuresproper mounting and provides theopportunity to upgrade to unit circuitbreaker Filter/Fan Fail SwitchesThese sensors allows a zone sensorservice light or Integrated ComfortSystem to indicate a dirty filter or a fanthat s not working.

8 The field installationcharges for these valuable feedbackdevices often eliminate them fromconsideration. Factory installation canmake such features a good Trane CommunicationInterfaceAvailable factory or field-installed. Thismodule, when applied with the Micro,easily interfaces with Trane s IntegratedComfortTM following options round-out thecomplete line of Precedent options: 0 - 50% Manual or MotorizedOutside Air Discharge Air Sensor Electric Heaters Hail Protection Quality Coil Guards Supply and/or Return SmokeDetectors High Pressure Cutout(standard on 3-phase models withscroll compressors) Wide array of Zone Sensors Factory built Roof Curb Power Exhaust LonTalk Communications InterfaceOne of Our Finest Assets: Trane Sales Representatives are aSupport group that can assist you with: Product Application Service Training Special Applications Specifications Computer Programs and much morePrecedent has the features and benefitsthat make it first class in the lightcommercial rooftop market.

9 Designedwith input from field contractors andengineers, its airflow performance same added MountedDisconnect Circuit Breaker8 PKGP-PRC003-ENFeatures andBenefitsVariTrac CCOMFORTCCOMFORTCCOMFORTCCOMFORTCCOMFORT MANAGERMANAGERMANAGERMANAGERMANAGERINPUT /STATUSPANELTIMECLOCKEDITTERMINALC entralControl PanelVa ri Tra c When Trane s changeover VAV Systemfor light commercial applications iscoupled with Precedent, it provides thelatest in technological advances forcomfort management systems and canallow thermostat control in every zoneserved by VariTrac. We perform a 100% coil leak test at thefactory. The evaporator and condensercoils are leak tested at 200 psig andpressure tested to 450 psig. All parts are inspected at the point offinal assembly. Sub-standard parts areidentified and rejected immediately. Every unit receives a 100% unit run testbefore leaving the production line tomake sure it lives up to rigorous test designs at our factory not on ourcustomers!

10 Quality And Reliability Testing All Precedent designs wererigorously rain tested at the factory toensure water integrity. Actual shipping tests were performedto determine packaging were test shipped around thecountry to determine the bestpackaging. Factory shake and drop tests wereused as part of the package designprocess to help assure that the unitarrives at the job site in top condition. Rigging tests include lifting a unit intothe air and letting it drop one foot,assuring that the lifting lugs and railshold up under of this product should bewithin the cataloged airflow and Ambient CoolingPrecedent features, as standard, lowambient cooling down to 0F. Contactyour local Trane Representative for moreassistance with low ambient ReliefThis product line offers an optionalbarometric relief damper for use inconjunction with economizer option consists of gravity damperswhich open with increased pressure. Asthe building air pressure increases, thepressure in the unit return air sectionalso increases, opening the dampersand relieving the conditioned : THE EFFECTIVENESS OFBAROMETRIC RELIEF DAMPERDURING ECONOMIZING OPERATIONIS SYSTEM DROP OF THE RETURN AIRSYSTEM SHOULD BE CONSIDERED TOCONTROL BUILDING TrapThe evaporator is a draw-thruconfiguration.