Carrier 50TCQD Specifications

50TCQD17---D24Single Package Heat Pump/Electric HeatNominal15to20TonsWith PuronR(R---410A) RefrigerantService and Maintenance InstructionsTABLE OF CON

10To CondensingCircuitFromTransferHeaderC09231Fig. 15 -- Heat Pump Accutrol — Flow as CondenserFunction/Entering Second PassFrom SubcoolerCircuitToLiq

11Apply compressor refrigerant oil t o the check valve core’sbottom O --ring. Install the fitting body and torque to9610 in--lbs (10.9  1 Nm). Do no

12OUTLETINLETPUSHRODSDIAPHRAGMNEEDLEVALVESPRINGDISTRIBUTORFEEDER TUBESCAPILLARY TUBECOILBULBEXTERNAL EQUALIZER TUBEC09228Fig. 18 -- Thermostatic Expan

13TXV SENSINGBULBCLAMPTHERMAL EXPANSION(TXV) VALVESENSING BULB INSULATION REMOVED FOR CLARITYC12095Fig. 19 -- TXV Valve and Sensing BulbHow To Use Coo

14PURONR(R--410A) REFRIGERANTThis unit i s designed for use with Puron (R--410A)refrigerant. Do not use any other refrigerant in thissystem.Puron (R--

15COOLING CHARGING CHARTSOVERCHARGING UNIT INCREASES THE RISK OFNUISANCE HIGH PRESSURE SWITCH TRIPSCAUTION DO NOT OVERCHARGE UNITIN HEATING MODE,RECLA

16OVERCHARGING UNIT INCREASES THE RISK OFNUISANCE HIGH PRESSURE SWITCH TRIPSCAUTION DO NOT OVERCHARGE UNIT20 TON HEAT PUMP CHARGING CHART - R410A REFR

17Replacing Compressor!WARNINGFIRE, EXPLOSION HAZARDFailure to follow thiswarning could result indeath, serious personalinjury and/or propertydamage.N

18Tabl e 4. Heating and Cooling TroubleshootingPROBLEM CAUSE REMEDYCompressor andOutdoor FanWill Not Start.Power failure. Call power company.Fuse blow

19CONVENIENCE OUTLETSELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Units with convenience outlet c

2ELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Before performing service or maintenance operations

20when the unit disconnec t or HACR switch is open. SeeFig. 27.Duty Cycle — the unit--powered convenience outlet has aduty cycle limitation. The trans

21Jumpers JMP5, JMP6 and JMP7 are located in notchesacross the top of the CTB. See Fig. 28. These jumpers arefactory cut on all heat pump units. Visua

22DIPSwitchesSpeed-UpJumpersC09275Fig. 29 -- Defrost Control Board (DFB) ArrangementThe DFB is located in the 50TCQ’s main control box (seeFig. 30). A

23Reversing valve control — The DFB has two outputs forunit reversing valve control. Operation of the reversingvalves is based on internal logic; this

24sec/minute. (For example, the 90 minute run period isreduced to 9 seconds) The DFB will step the unit througha Heating cycle and a Defrost cycle usi

25Table 1 – Heater Model NumberACCESSORYHEATER PARTNUMBERUNIT MODELSHEATER/BASE UNIT VOLTAGEHEATER KW*FANDISCHARGESTAGESCRHEATER270A00 50TCQ-D17—24 20

26On 50TCQ units, all fuses are 60--A. Single point boxescontaining fuses for 208/230--V applications use UL ClassRK5 250--V fuses (Bussman FRNR 60 or

27inside the Single Point Box. Use UL a pproved pressureconnectors (field--supplied) for these splice joints.Low--Voltage Control Connections — Pull t

28blowers, change over air handling systems, notify the firealarm control panel, etc.The sensor uses a process called Differential Sensing toprevent g

29Completing Installation of Return Air SmokeSensorSAMPLE TUBEC09686Fig. 43 -- Return Air Detector Shipping Position1. Remove blower access panel.2.

3UNIT ARRANGEMENT AND ACCESSGeneralFig. 1 and Fig. 2 show general unit arrangement andaccess locations.FILTERANDINDOORCOILACCESSPANELCONTROLBOXACCESSP

30VERTICAL ASSEMBLYKNOCKOUT LOCATION FOR VERTICALKNOCKOUT LOCATION FOR HORIZONTALHORIZONTAL ASSEMBLYPICK-UP TUBEBRACKETEMT TO SEAL TIGHT CONNECTORSMOK

31AEFCDBC08246Fig. 45 -- Typical Smoke Detector System WiringSensor and Controller TestsSensor Alarm TestThe sensor alarm test checks a sensor’s abili

32Dirty Controller TestThe dirty controller test checks the controller’s ability toinitiate a dirty sensor test and indicate its results.OPERATIONAL T

33Remote Test/Reset Station Dirty Sensor TestThe test/reset station dirty sensor test checks the test/resetstation’s ability to initiate a sensor dirt

346. Connect power to the duct detector then perform asensor alarm test.AIRFLOWHVAC DUCTSAMPLINGTUBERETAINERCLIPOPTICPLATEOPTICHOUSINGSENSOR HOUSINGC0

35Sensor’ s Power LED is Off:1. Check the controller’s Power LED. If it is off, de-termine why the controller does not have power andmake the necessar

36RTU--OPEN CONTROL SYSTEMRTU--Open ControllerThe RTU--OPEN controller is an integra ted component ofthe Carrier rooftop unit. Its internal applicatio

37C10818Fig. 50 -- RTU --OPEN Control Module

38PRE--START--UPSTART--UPPERSONAL INJURY HAZARDFailure to follow this warning could result in personalinjury or death.!WARNING3. Follow recognized saf

39Inspect the field installed accessories for properinstallation, maki ng note of which ones do or do notrequire configuration changes. Inspect the RT

4Observe the flow direction arrows on the side of eachfilter frame when reinstalling.Economizer and Manual Outside Air H ood ScreenThe Manual Outside

40Ventilation (Continuous Fan)Set fan and system selector switches at ON and OFFpositions, respec tively. Supply fan operates conti nuouslyto provide

41APPENDIX I. MODEL NUMBER SIGNI FICANCETable 12. Model Number Nomenclature1234567891011121314151617185 0 T C Q D 2 4 A 1 A 6 -- 0 A 0 A 0____ ____ __

42Table 13. Serial Number FormatPOSITION NUMBER 1 2 3 4 5 6 7 8 9 10TYPICAL 0 4 1 2 G 1 2 3 4 5POSITION DESIGNATES1---2 Week of manufacture (fiscal ca

43APPENDI X II. PHYSICAL DATATable 14. Physical data Vertical (Cooling) 15 and 20 Tons50TCQ17 50TCQ24Refrigeration System# Circuits / # Comp. / Type 2

44APPENDIX II. PHYSICAL DATA (cont.)Table 15. Physical data Horizontal (Cooling) 15 and 20 Tons50TCQ17 50TCQ24HORIZONTALStandard StaticMotor Qty / Dri

45APPENDIX III. ELECTRICAL DATATable 55 – ELECTRIC HEAT ELECTRICAL DATA 15 TONUNITNOM.V --- P H --- H ZIFMTYPEELECTRICHEATERPART NUMBERCRHEATERNOMINAL

46APPENDIX III. ELECTRICAL DATA (cont.)TABLE 16. ELECTRIC HEAT ELECTRICAL DATA 20 TONUNITNOM.V --- P H --- H ZIFMTYPEELECTRICHEATERPART NUMBERCRHEATER

47APPENDIX IV. ELECTRICAL INFORMATIONTable 17. 2--Stage Cooling -- 15 Tons (50TCQD17) and 20 Tons (50TCQD24)UNITV --- P H --- H ZVOLTAGERANGECOMP 1 CO

48APPENDIX IV. ELECTRICAL INFORMATION (cont.)Table 55 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEAT

49APPENDIX IV. ELECTRICAL INFORMATION (cont.)Tabl e 75 -- MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HE

51. Loosen the four front and rear motor mounting platebolts.2. Loosen the two jack bolt jam nuts.3. Turn the two jack bolts counterclockwise to loose

50APPENDIX IV. ELECTRICAL INFORMATION (cont.)Table 55 – MCA/MOCP DETERMINATION W/ PWRD C.O .UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER w/ PWR

51APPENDIX IV. ELECTRICAL INFORMATION (cont.)TABLE 18 – (cont.) MCA/MOCP DETERMINATION W/ PWRD C.O.UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER

52APPENDIX IV. ELECTRICAL INFORMATION (cont.)Legend and Notes for Tables 48 through 52LEGEND:CO --- Convenient outletDISC --- DisconnectFLA --- Full l

53APPENDIX V. WIRING DIAGRAMSWiring Diagrams List50TCQDSIZE VOLTAGE CONTROL POWERD17208/230--- 3---60 50HE500937 --- 50HE500894 ---460--- 3--- 60 50HE

54APPENDIX V. WIRING DIAGRAMSC12398Fig. 51 -- 50TCQ--D17 Power Wiri ng Diagram; 208/230--3--60

55APPENDIX V. WIRING DIAGRAMSC12399Fig. 52 -- 50TCQ--D17 Power Wiri ng Diagram; 460--3--60/575--3--60

56APPENDIX V. WIRING DIAGRAMSC12400Fig. 53 -- 50TCQ--D24 Power Wiri ng Diagram; 208/230--3--60

57APPENDIX V. WIRING DIAGRAMSC12401Fig. 54 -- 50TCQ--D17 Power Wiri ng Diagram; 460--3--60/575--3--60

58APPENDIX V. WIRING DIAGRAMSC12402Fig. 55 -- 50TCQ--D17/D24 Control Wiring Diagram; 208--3--60/460--3--60/575--3--60

59APPENDIX V. WIRING DIAGRAMSC12359Fig. 56 -- RTU--OPEN Control Diagram

6Bearings:The fan system uses bearings featuring concentric splitlocking collars. A Torx T25 socket head cap screw is usedto tighten the locking c oll

60APPENDIX V. WIRING DIAGRAMS50HE500891 F50HE500751 JC12402Fig. 57 -- PremierLinktWiring Diagram

61APPENDIX VI . FAN PERFORMANCEGeneral Fan Performance Notes:1. Interpolation is permissible. Do not extrapolate.2. External static pressure is the st

62APPENDIX VI. FAN PERFORMANCE (cont.)Table 55 – 50TCQ--D17 15 TON HORIZONTAL SUPPLY / RETURNCFMAVAILABLEEXTERNALSTATICPRESSURE(IN.WG)0.2 0.4 0.6 0.8

63APPENDIX VI. FAN PERFORMANCE (cont.)Table 55 – 50TCQ--D17 15 TON VERTICAL SUPPLY / RETURNCFMAVAILABLEEXTERNALSTATICPRESSURE(IN.WG)0.2 0.4 0.6 0.8 1.

64APPENDIX VI. FAN PERFORMANCE (cont.)Table 55 – 50TCQ--D24 20 TON HORIZONTAL SUPPLY / RETURNCFMAVAILABLEEXTERNALSTATICPRESSURE(IN.WG)0.2 0.4 0.6 0.8

65APPENDIX VI. FAN PERFORMANCE (cont.)Table 55 – 50TCQ--D24 20 TON VERTICAL SUPPLY / RETURNCFMAVAILABLEEXTERNALSTATICPRESSURE(IN.WG)0.2 0.4 0.6 0.8 1.

66APPENDIX VI. FAN PERFORMANCE (cont.)Table 20. Pulley Adjustment -- Standard Tier -- HorizontalUNITMOTOR/DRIVECOMBOMOTOR PULLEY TURNS OPEN0 0.5 1 1.5

67APPENDIX VII. MOTORMASTER SENSOR LOCATIONSSENSORLOCATIONC12035Fig. 58 -- 50TCQD17 and 50TCQD25 Motormaster Sensor Location

68Copyright 2009 Ca rrier Corp. S 7310 W. Mo rris St. S Indianapolis, IN 46231 Edition Date: 06/12Manufacturer reserves the right to change, at any ti

69START-UP CHECKLI ST(Remove and Store in Job File)I. PRELIMINARY INFORMATIONMODEL NO.: SERIAL NO.:DATE: TECHNICIAN:II. PRE-START-UP (insert checkmark

7Periodic Clean Water Rinse:A periodic clean water rinse is very beneficial for coilsthat are appl ied in coastal or industrial environments.However,

70Copyright 2009 Ca rrier Corp. S 7310 W. Mo rris St. S Indianapolis, IN 46231 Edition Date: 06/12Manufacturer reserves the right to change, at any ti

8Totaline Environmentally Sound Coil CleanerApplication Equipment:S 2.5 gal (9.5L) garden spraye rS Water rinse with low velocity spray nozzleUNIT DAM

9DFT 2DFT1FILTERDRIERFILTERDRIER1A2AOUTDOOR COILINDOOR COILACCUMULATORACCUMULATORHPS1STRAINERHEATING LIQUID LINESSTRAINER1C2C2D1DTXV 2TXV1COOLING LIQU