Packaged Gas/Electric Rooftop Units

1 Packaged Gas/ElectricRooftop UnitsPrecedent 3 - 10 Tons 60 HzRT-PRC006-ENOctober 2004 2004 American Standard Inc. All rights reservedRT-PRC006-ENIntroductionPackaged RooftopAir ConditionersThrough the years, Trane has designedand developed the most complete line ofPackaged Rooftop products available inthe market today. Trane was the first tointroduce the Micro microelectronicunit controls and has continued toimprove and revolutionalize this controls are availablefor simpler applications, and for themore sophisticated, ReliaTel microprocessor ReliaTel control platform offers thesame great features and functionality asthe original Micro, with additionalbenefits for greater application its sleek compact cabinet, roundedcorners and beveled top Precedentcontinues to provide the higheststandards in quality and reliability,comfort.

2 Ease of service, and theperformance of Trane light customers demand products thatprovide exceptional reliability, meetstringent performance requirements,and are competitively priced. Tranedelivers with features cutting edgetechnologies: reliable compressors,Trane engineered ReliaTel controls,computer-aided run testing, andIntegrated Comfort Systems. So,whether you re the contractor, theengineer, or the owner you can becertain Precedent Products are built tomeet your s Hard To Stop A Trane. 3 ContentsRT-PRC006-ENIntroductionFeatures and BenefitsApplication ConsiderationsSelection ProcedureModel Number DescriptionGeneral DataPerformance DataCooling PerformanceFan PerformanceHeating PerformanceControlsElectric PowerDimension and WeightsMechanical Specifications24111214152837287577798695 RT-PRC006-EN4 Features andBenefitsFactory Installed Options Black Epoxy Pre-Coated Coils Dehumidification Option High Pressure Cutout Hinged Access Doors Novar Return Air Sensor Novar unit Controls Phase Monitor

3 Powered or Unpowered ConvenienceOutlet Supply and/or Return Air Smoke Detector Thermal Expansion Valve Through the Base Electrical Access Through the Base Electrical With CircuitBreaker Through the Base Electrical WithDisconnect Switch Two-Inch Pleated FiltersFactory or Field Installed Options Clogged Filter/Fan Failure Switch Differential Pressure Switches Discharge Air Sensing Kit Economizer electric Heaters Frostat LonTalk Communications Interface Oversized Motors Reference or Comparative Enthalpy Tool-less Hail Guards Trane Communications Interface (TCI)

4 Field Installed Options CO2 Sensing Digital Display Zone Sensor Dual Thermistor Remote Zone Sensor High Static Drive Humidity Sensor Manual Outside Air Damper Motorized Outside Air Dampers Powered Exhaust Remote Potentiometer Roof Curb Thermostat Ventilation Override Accessory Zone Sensor5RT-PRC006-ENFeatures andBenefitsEasy to Install, Service andMaintainBecause today s owners are very cost-conscious when it comes to service andmaintenance, the Trane Precedent wasdesigned with direct input from servicecontractors. This valuable informationhelped to design a product that would getthe serviceman off the job quicker andsave the owner money.

5 Precedent doesthis by offering:Quality and ReliabilityReliaTel Controls (LCI-R)ReliaTel controls provide unit control forheating, cooling and ventilating utilizinginput from sensors that measure outdoorand indoor and Reliability are enhancedthrough ReliaTel control and logic: prevents the unit from short cycling,considerably improvingcompressor life. ensures that the compressor will runfor a specific amount of time whichallows oil to return for betterlubrication, enhancing the reliability ofthe with ReliaTel reduces thenumber of components required tooperate the unit , thereby reducingpossibilities for component Makes Installing andServicing EasyReliaTel eliminates the need for fieldinstalled anti-shortcycle timer and timedelay relays.

6 ReliaTel controls providethese functions as an integral part of theunit. The contractor no longer has topurchase these controls as options andpay to install wiring of the low voltage connectionsto the unit and the zone sensors is aseasy as 1-1, 2-2, and 3-3. This simplifiedsystem makes wiring easier for Makes Testing EasyReliaTel requires no special tools to runthe Precedent unit through its place a jumper between Test 1and Test 2 terminals on the Low VoltageTerminal Board and the unit will walkthrough its operational stepsautomatically.

7 The unit automatically returns control to the zone sensor after stepping through the test mode a single time, even if the jumper is left on the long as the unit has power and the system on LED is lit, ReliaTel isoperational. The light indicates that thecontrols are functioning features expanded diagnosticcapabilities when utilized with TraneIntegrated Comfort zone sensor options have centralcontrol panel lights which indicate themode the unit is in and possiblediagnostic information (dirty filters forexample).

8 Other ReliaTel BenefitsThe ReliaTel built-in anti-shortcycle timer,time delay relay and minimum on timecontrol functions are factory tested toassure proper softens electrical spikes bystaging on fans, compressors Fallback is a benefit to thebuilding occupant. If a component goesastray, the unit will continue to operate atpredetermined temperature Anticipation is a standardReliaTel feature. It functions continuouslyas ReliaTel and zone sensor(s) worktogether in harmony to provide muchtighter comfort control than conventionalelectro-mechanical same ReliaTel Board fits allPrecedent Packaged Gas/Electrics,Cooling with electric Heat, and HeatPump models.

9 This providesstandardization of parts for money is tied up in inventory ControlsFor the simpler job that does not requirea building automation system, orexpanded diagnostics capabilities,Precedent offers electromechnicalcontrols. This 24-volt control includes thecontrol transformer and contactorpressure lugs for power RT-PRC006-EN6 Features andBenefitsBlack Epoxy Pre-Coated CoilsThe pre-coated coils are an economicaloption for protection in mildly IntegrityFor added water integrity, Precedent hasa raised 11/8" lip around the supply andreturn of the downflow Units to preventwater from blowing into the Filter/Fan Failure SwitchA dedicated differential pressure switch isavailable to achieve active fan failureindication and/or clogged filter sensors allow a zone sensorservice light or Integrated ComfortSystem to indicate a dirty filter or a fanthat s not working.

10 The field installationcharges for these valuable feedbackdevices often eliminate them fromconsideration. Factory installation canmake such features a good SensingThe CO2 sensor has the ability to monitorspace occupancy levels within thebuilding by measuring the parts permillion of CO2 (Carbon Dioxide) in the the CO2 levels increase, the outside airdamper modulates to meet the CO2space ventilation requirements. The CO2sensor kit is available as a field And Numbered WiringSave time and money tracing wires anddiagnosing the Standard andOptional ComponentsCompressorsPrecedent contains the best compressortechnology available to achieve thehighest possible performance.