Carrier 48TC*D08 Specifiche

48TC*D08---D14Nominal 7.5 to 12.5 TonsWi t h Pu ro n (R---410A) RefrigerantService and Maintenance InstructionsTABLE OF CONTENTSSAFETY CONSIDERATIONS

10COOLING CHARGING CHARTSC08669Fig. 10 -- Cooling Charging Charts (D08)48TC

11COOLING CHARGING CHARTSC08670Fig. 11 -- Cooling Charging Charts (D12)48TC

12COOLING CHARGING CHARTSC09151Fig. 12 -- Cooling Charging Charts (D14 -- Circuit A)48TC

13COOLING CHARGING CHARTSC09152Fig. 13 -- Cooling Charging Charts (D14 -- Circuit B)48TC

14Table 1 – Cooling Service AnalysisPROBLEM CAUSE REMEDYCompressor and CondenserFan Will Not Start.Power failure. Call power company.Fuse blown or cir

15CompressorsLubricationCompressors are cha rged with the correct amount of oil atthe factory.UNIT DAMAGE HAZARDFailure to follow this caution may res

16CONVENIENCE OUTLETSELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Units with conveni ence outlet

17MaintenancePeriodically test the GFCI receptacle by pressing theTEST button on the face of the receptacle. This shouldcause the internal circuit of

18The sensor uses a process called differential sensing toprevent gradual environmental changes from triggeringfalse alarms. A rapid change in e nviro

19Return AirSampling TubeC08129Fig. 22 -- Return Air Sampling Tube LocationCompleting Installation of Return Air SmokeSensor:SCREWSEXHAUSTTUBEFLEXIBLE

2FIRE, EXPLOSION HAZARDFailure to follow this warning could result inpersonal injury, death and/or property damage.Refer to the User’s Information Man

20AEFCDBC08246Fig. 25 -- Typical Smoke Detector System WiringHighlight C: 24--v power signal via ORN lead is removedat Smoke Detector input on LCTB; a

21OPERATIONAL TEST HAZARDFailure to follow this caution may result in personneland aut hority concern.This test places the duct detector into the alar

22SD--TRK4 Remote Alarm Test Procedure1. Turn the key switch to the RESET/TEST position forseven seconds.2. Verify that the test/reset station’s Alarm

23INDICATORSNormal StateThe smoke detector operates in the normal state in theabsence of any trouble conditions and when its sensingchamber is free of

24Table 3 – Detector IndicatorsCONTROL OR INDICATOR DESCRIPTIONMagnetic test/reset switchResets the sensor when it is in the alarm or trouble state. A

25Condenser Fan Motor ProtectionThe condenser fan motor is int ernally protected againstovertemperature.Control Circuit, 24--VThe control circui t is

2648TCDD08 onlyC08238All 48TC*D except DD08C08239Fig. 31 -- LP Low Pressure Switch (Installed)PNKW2TSTATGRABRNIGCJ2-12IGCJ2-11BRNCNOMGVCLP LPSC08285Fi

27HEATER TUBEASSEMBLYSEAL STRIPS,SPONGE RUBBERREGULATORGASKETREGULATORRETAINERWIND CAPASSEMBLY(SHOWNINVERTED,AS SHIPPED)BURNER ASSEMBLYINDUCER FAN-MOT

28MANIFOLD PRESSURE TAPGASVALVEBURNERSC09154Fig. 35 -- Burner Tray Detail s6. Remove igniter wires and sensor wires at the Integ-rated Gas Unit Contro

29125,000/90,000 BTUH INPUT180,000/120,000 BTUH INPUT240,000/180,000 BTUH INPUT 250,000/200,000 BTUH INPUTC08447Fig. 37 -- Spark Adjustment (08--14)Bu

3BLOWERACCESSPANELFLUE OPENINGCONTROL BOXCOMPRESSORC08450Fig. 2 -- Typical Access Panel Location (Front)Routine MaintenanceThese items should be part

30C08240C0824148TCDD08 onlyAll 48TC*D except DD08Fig. 38 -- Gas ValveOrifice ReplacementThis unit uses orifice type LH32RFnnn (where nnnindicates orif

31Red LED-StatusC08452Fig. 39 -- Integrated Gas Control (IGC) BoardTable 10 – IGC ConnectionsTERMINAL LABEL POINT DESCRIPTION SENSOR LOCATION TYPE OF

32Table 11 – Orifice SizesORIFICEDRILL SIZECARRIERPART NUMBERDRILLDIA. (in.)#30 LH32RF129 0.12851/8 LH32RF125 0.1250#31 LH32RF120 0.1200#32 LH32RF116

33Minimum Heating Entering Air TemperatureWhen operating on first stage heating, the minimumtemperature of air entering the dimpled heat exchanger is5

34Table 14 – IGC Board LED Alarm CodesLEDFLASHCODEDESCRIPTIONACTION TAKEN BYCONTROLRESET METHOD PROBABLE CAUSEOn Normal Operation — — —Off Hardware Fa

35CONDENSER COIL SERVICECondenser CoilThe condenser coil is new NOVATION Heat ExchangerTechnol ogy. This is an all--aluminum construction withlouvere

36PREMIERLINKt CONTROLThe PremierLink controller (see Fig. 41) is compatiblewith Carrier Comfort Networkr (CCN) devices. Thiscontrol is designed to al

37C08665Fig. 43 -- Typical PremierLinkt System Control Wiring Diagram48TC

38Table 15 – Thermistor Resistance vs TemperatureValues for Space Temperature Sensor, Supply AirTemperature Sensor, and Outdoor Air TemperatureSensorT

39Table 16 – PremierLink Sensor UsageAPPLICATIONOUTDOOR AIRTEMPERATURESENSORRETURN AIRTEMPERATURESENSOROUTDOOR AIRENTHALPY SENSORRETURN AIRENTHALPY SE

422 3/8 (569 mm)HOODDIVIDEROUTSIDEAIRCLEANABLEALUMINUMFILTERBAROMETRICRELIEFFILTERCAPFILTERC08634Fig. 3 -- Filter InstallationTo remove the filter, op

40Table 18 – Thermostat ModeTB1 TERMINAL FIELD CONNECTION INPUT SIGNAL1 RAT SEN Analog (10k thermistor)2 G Discrete, 24VAC3 RAT SEN Analog (10k thermi

41Configure the unit for Thermostat Mode — Connec t to theCCN bus using a CCN service tool a nd navigate toPremierLink Configuration screen for Operat

42The CO2sensors are all factory set for a range of 0 to2000 ppm and a linear m A output of 4 to 20. Refer to theinstructions supplied with the CO2sen

43Refer to the Rooftop PremierLink Installation, Start-Up,and Configuration Instructions (Form 33CS --58SI),PremierLink Installation, Start --up, and

44Power ExhaustJ8-315CTB1THERMOSTATPLPECTANGRALCTBC08120Fig. 58 -- PremierLinkt Power Exhaust OutputConnectionSpace Relative Humidity Sensor — The RH

45C07129Fig. 60 -- RTU--MP Multi--Protocol Control Board48TC

46C09163Fig. 61 -- Typical RTU--MP System Control Wiring Diagram48TC

47Table 21 – RTU--MP Controller Inputs and OutputsPOINT NAMEBACnet OBJECTNAMETYPE OF I/OCONNECTION PINNUMBERSINPUTSSpace Temperature Sensor sptsens AI

48Outdoor air management functions can be enha nced withfield--installation of these accessory control devices:Enthalpy control (outdoor air or differ

49Loca te the enthal py control in the ec onomizer hood.Locate two GRA leads in the factory harness and connectthese leads to enthalpy control sensors

5To replace the belt:1. Use a belt with same section type or similar size. Donot substitute a “FHP” type belt. When installing thenew belt, do not use

50To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on theOAQ sensor. See Fig. 51. Connect the 4

51SW3 Protocol SelectionPROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1BACnet MS/TP(Master)Unused OFF OFF OFF ON OFF Select Baud Select BaudModbus(Slave)Unus

52C07170Fig. 69 -- BACview6Handheld ConnectionsTable 22 – LEDsThe LEDs on the RTU--MP show the status of certain functionsIf this LED is on... Status

53Table 23 – Troubleshooting AlarmsPOINT NAMEBACnetOBJECTNAMEACTION TAKEN BYCONTROLRESETMETHODPROBABLE CAUSESafety Chain Alarm safety_chainAlarm Gener

54AlarmsAlarms can be checked through the network and/or thelocal access. All the alarms are listed in Table 23 withname , object name, action t aken

55Device Instance: 0160001 1 PRGs loaded. 1 PRGs running. Module status: Firmware sections validated in flash memory ================================

56Table 24 – Manufacture DateWhen troubleshooting, you may need to know a control module’s manufacture dateObtain the manufacture date froma...NotesMo

57NOTE: See RTU--MP 3rd Party Integration Guide (oralternatively RTU --MP 3rd Party Integration Guide (oralternatively RTU--MP Controls, Start--Up, Op

58C09023Fig. 73 -- EconoMi$er IV Wiring435286711011912PINKVIOLETBLACKBLUEYELLOWNOTE 1NOTE 3RUN500 OHMRESISTOR50HJ540573ACTUATORASSEMBLYREDWHITEECONOMI

59Table 27 – EconoMi$er IV Input/Output LogicINPUTS OUTPUTSDemand ControlVentilation (DCV)Enthalpy*Y1 Y2Compressor NTerminal†Outdoor ReturnStage1Stage

6Changing fan wheel speed by changing pulleys: Thehorsepower rating of the belt is primarily dictated by thepitch diameter of the smaller pulley in th

60Supply Air Temperature (SAT) SensorThe supply air temperature sensor is a 3 K t hermistorlocated at the inlet of the indoor fan. (See Fig. 76.) This

61Differential Dry Bulb ControlFor differenti al dry bulb control the standard outdoor drybulb sensor is used in conjunction with an additionalaccesso

62TR124 VacCOMTR24 Va cHOT12345EFEF1+_P1T1PTNEXH2V 10VEXHSetSet2V 10V2V 10VDCVDCVFreeCoolBCADSO+SR+SRSOAQ1AQDCVMinPosOpenMaxN1C06038Fig. 82 -- EconoMi

63Adjust the minimum position potentiometer to allow theminimum amount of outdoor air, as required by localcodes, to enter the building. Make minimum

64The same equation can be used to dete rmine the occupiedor maximum ventilation rate to the building. For example,an output of 3.6 volts t o the actu

65Table 29 – EconoMi$er IV Sensor UsageAPPLICATIONECONOMI$ER IV WITH OUTDOOR AIR DRYBULB SENSORAccessories R equiredOutdoor AirDry BulbNone. The outdo

665. Turn the DCV setpoint potentiometer CW until theDCV LED turns off. The DCV LED should turn offwhen the potentiometer is approximately 9--v. Theac

67C09156Fig. 84 -- 48TC Typical Unit Wiring Diagram -- Power (D08, 208/230--3--60)48TC

68C09157Fig. 85 -- 48TC Typical Unit Wiring Diagram -- Control (D08, 208/230--3--60)48TC

69PRE-- START--UPPERSONAL INJURY HAZARDFailure to follow this warning could result in personalinjury or death.1. Follow recognized safety pract ices a

7Routine Cleaning of NOVATION Condenser CoilSurfacesTo clean the NOVATION condenser coil, chemicals areNOT to be used; only water i s approved as the

70UNIT OPERATION AND SAFETY HAZARDFailure to follow this warning could result in personalinjury or death.Disconnect gas piping from unit when leak tes

71NOTE: The default value for the evaporator--fan motoron/off delay is 45 seconds. The Integrated Gas UnitController (IGC) modifies this value when ab

72Field Service Test mode has the following changes fromnormal operation:S Outdoor air temperature limits for cooling circuits,economizer, and hea tin

73Cooling/Econ SAT Low SetptThe supply ai r tem perature must remain above this valueto allow cooling with the economizer and/or compressors.There is

74T55/56 Override DurationThis sets the occupancy override duration when theoverride button is pushed on the space sensor.Factory Default = 1 hrRange

75OPERATING SEQUENCESBase Unit ControlsCooling, Units Without EconomizerWhen thermostat calls for Stage 1 cooling, terminals Gand Y1 are energized. Th

76DCV operation is avail able in Occ upied and Unoccupiedperiods with EconoMi$er IV. However, a controlmodification will be required on the 48TC unit

77Routine No. 2: If DXLOCK (or DX Cooling Lockout isdisabled) < OAT  68_F when Y1 input is energized, theeconom izer will be modulated to maintain

78Indoor Fan — The indoor fan will be turned on wheneverany one of t he following conditions are met:S If the PremierLink controller is in the occupie

79Table 30 – Available Cooling StagesNUMBER OFSTAGES01(ECONOMIZER*)2 3Compressor 1 Off Off On OnCompressor 2 Off Off Off On* If conditions are suitabl

85. Finned surfaces should remain wet with cleaningsolution for 10 minutes.6. Ensure surfaces are not allowed to dry before rinsing.Reapply cleaner as

80If the OAT is between DXLOCK and 68_F (DXLOCK <OAT < 68_F) and additional cooling is required, theeconomizer will close the to minimum positio

81There is also a SAT tempering routine that will act as SATlow limit safety to prevent the SAT from becoming toocold should the economizer fail to cl

82Tempe rature Com pensated Start — This function will runwhen the controller is in unoccupied state and willcalculate early start bias time (SBT) bas

83The PremierLinkt controller will generat e a LinkageCommunication Failure alarm if a failure occurs for 5consecut ive minutes once a Linkage ha s pr

84The Holiday schedule is creat ed to override the Dailyschedule and identify a specific day and month of the yearto start and stop the unit and chang

85Economize rThe Economizer dampers are used to provide free coolingand Indoor Air Quality, if optional CO2sensor is installed,when the out side condi

86Table 33 – Torque ValuesSupply fan motor mounting120 ¦ 12 in --- lbs 13.5 ¦ 1.4 NmSupply fan motor adjustment plate120 ¦ 12 in --- lbs 13.5 ¦ 1.4 Nm

87APPENDIX I. MODEL NUMBER SIGNIFICANCEModel Number Nomenclature1234567891011121314151617184 8 T C D D 0 8 A 1 A 5 -- 0 A 0 A 0____ ____ ____Unit Heat

88APPENDIX II. PHYSICAL DATAPhysical Data (Cooling) 7.5 -- 12.5TONS48TC*D08 48TC*D12 48TC*D14Refrigeration System#Circuits/#Comp./Type 2/2/Scroll 2/2/

89APPENDIX II. PHYSICAL DATA (cont.)Physical Data (Heating) 7.5 -- 12.5TONS48TC**08 48TC**12 48TC* *14Gas Connection#ofGasValves 1 1 1Nat. gas supply

91/2-20 UNF RH300.596.475/8” HEXSEATCORE WASHERDEPRESSOR PER ARI 720+.01/-.035 FROM FACE OF BODY7/16-20 UNF RHO-RING45torqued into the seat. Appropri

90APPENDIX III. FAN PERFORMANCE48TC**08 3 PHASE 7.5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BHP R

91FAN PERFORMANCE (cont.)48TC**12 3 PHASE 10 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BHP RPM BHP

9248TC**14 3 PHASE 12.5 TON HORIZONTAL SUPPLYCFMAvailable External Static Pressure (in. wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BHP RPM BHP RPM BHP RPM BHPS

93APPENDIX III. FAN PERFORMANCE (cont.)Pulley AdjustmentUNITMOTOR/DRIVECOMBOMOTOR PULLEY TURNS OPEN0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0083phase

94ELECTRICAL INFORMATION48TC*D08 2---Stage Cooling 7.5 TonsV --- P h --- H zVOLTAGERANGECOMP (Cir 1) COMP (Cir 2) OFM (ea) IFMRLA LRA RLA LRA WATTS FL

95MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLANO C.O. or UNPWRD C.O.NO P.E. w/ P

96APPENDIX IV. WIRING DIAGRAM LISTWiring Diagrams48TCSIZE VOLTAGE CONTROL POWERD08208/230---3 ---60 48TM501325 48TM501326460---3 --- 60 48TM501325 48T

97APPENDIX V. MOTORMASTER SENSOR LOCATIONSC09158Fig. 86 -- 48TC*D08--D12 Outdoor CircuitingNOTE: The low ambient kit for the 12.5 ton unit utilizes a

98UNIT START-UP CHECKLISTI. PRELIMINARY INFORMATION:MODEL NO.:DATE: ______________SERIAL NO: _____________________________________TECHNICIAN: ________