Carrier 48TCA04---A12 User Manual

48TCGas Heat/Electric Cooling Packaged Rooftop3to12.5NominalTonsProduct DataC08514(Unit shown with optional economizer.)This product has been designed

10TABLE 5 – HEATING RATING TABLE -- LOW NOX1UNITGAS HEATLOW NOx HEAT EXCHANGERTEMP RISE(DEG F)THERMALEFFICIENCY(%)AFUE(%)INPUT / OUTPUTSTAGE 1 (MBH)IN

11TABLE 7 – MINIMUM -- MAXIMUM AIRFLOW RATINGS -- NATURAL GAS & PROPANEUNIT HEAT LEVELCOOLING HEATINGMINIMUM MAXIMUM MINIMUM MAXIMUM48TC**04LOW900

12TABLE 8 – PHYSICAL DATA (COOLING) 3 -- 6 TONS48TC*A04 48TC*A05 48TC*A06 48TC*A07Refrigeration System#Circuits/#Comp./Type 1/1/Scroll 1/1/Scroll 1/1/

13TABLE 9 – PHYSICAL DATA (H EATING) 3 -- 6 TONS48TC**04 48TC**05 48TC**06 48TC* *07Gas Connection#ofGasValves 1 1 1 1Nat. gas supply line press (in.

14TABLE 10 – PHYSICAL DATA (COOLING) 7.5 -- 12.5 TONS48TC*A08 48TC*D08 48TC*A09 48TC*A12 48TC*D12 48TC*D14Refrigeration System#Circuits/#Comp./Type 1/

15TABLE 11 – P HYSICAL DATA (HEATING) 7.5 -- 12.5 TONS48TC**08 48TC**09 48TC**12 48TC* *14Gas Connection#ofGasValves 1 1 1 1Nat. gas supply line press

16CURBS & WEIGHTS DIMENSIONS -- CHASSIS 1C08517Fig. 1 -- Dimensions 48TC 04-- 0748TC

17CURBS & WEIGHTS DIMENSIONS -- CHASSIS 1 (cont.)C08593Fig. 2 -- Dimensions 48TC 04-- 07C07458Fig. 3 -- Curb DimensionsGASKET(SUPPLIED WITH CURB)N

18CURBS & WEIGHTS DIMENSIONS -- CHASSIS 2C08519Fig. 6 -- Dimensions 48TC 08-- 1248TC

19CURBS & WEIGHTS DIMENSIONS -- CHASSIS 2 (cont.)C08520Fig. 7 -- 48TC 08 -- 12C08309Fig. 8 -- Curb DimensionsGASKET(SUPPLIED WITH CURB)NAILCOUNTER

2TABLE OF CONTENTSPAGEFEATURES AND BENEFITS 3...MODEL NUMBER NOMENCLATURE 4...FACTORY OPTIONS AND/OR ACCESSORIES 6...ARI C

20CURBS & WEIGHTS DIMENSIONS -- CHASSIS 3C08521Fig. 11 -- Dimensions 48TC--1448TC

21CURBS & WEIGHTS DIMENSIONS -- CHASSIS 3 (cont.)C08522C08309Fig. 12 -- Curb DimensionsGASKET(SUPPLIED WITH CURB)NAILCOUNTER FLASHING(FIELD SUPPLI

22APPLICATION DATAMin operating ambient temp (cooling):In mechanical cooling mode, your Carrier rooftop unit cansafely operate down to an outdoor ambi

23Sizing a rooftopBigger isn’t necessarily better. While an a ir conditionerneeds to have enough capacity to meet the design loads, itdoesn’t need exc

24SELECTION PROCEDURE (WITH 48TC*A07 EXAMPLE)1I. Determine cooling and heating loads.Given:Mixed air dry bulb 80_F(27_C)Mixed air wet bul b 67_F(19_C)

25TABLE 12 – COOLING CAPACITIES 1--STAGE COOLING 3 TONS48TC*A04AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85 75

26Table 12 (cont.) COOLING CAPACITIES 1--STAGE COOLING 3 TONS4 8 T C 0 4 ( 3 T O N S ) --- U N I T W I T H H U M I D I --- M I Z E R S Y S T E M I N H

27TABLE 13 – COOLING CAPACITIES 1--STAGE COOLING 4 TONS48TC*A05AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85 75

28Table 13 (cont.) COOLING CAPACITIES 1--STAGE COOLING 4 TONS4 8 T C 0 5 ( 4 T O N S ) --- U N I T W I T H H U M I D I --- M I Z E R S Y S T E M I N H

29TABLE 14 – COOLING CAPACITIES 1--STAGE COOLING 5 TONS48TC*A06AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85 75

3FEATURES AND BENEFITSS Single cooling stage models are available from 3 -- 10 ton.S Two cooling sta ge models are available from 7.5 -- 12.5 ton with

30Table 14 (cont.) COOLING CAPACITIES 1--STAGE COOLING 5 TONS5 8 T C 0 6 ( 5 T O N S ) --- U N I T W I T H H U M I D I --- M I Z E R S Y S T E M I N H

31TABLE 15 – COOLING CAPACITIES 1--STAGE COOLING 6 TONS48TC*A07AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85 75

32Table 15 (cont.) COOLING CAPACITIES 1--STAGE COOLING 6 TONS4 8 T C 0 7 ( 6 T O N S ) --- U N I T W I T H H U M I D I --- M I Z E R S Y S T E M I N H

33TABLE 16 – COOLING CAPACITIES 1--STAGE COOLING 7.5 TONS48TC*A08AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EA (db)75 80 85 75 80 85 7

34TABLE 17 – COOLING CAPACITIES 2--STAGE COOLING 7.5 TONS48TC*D08AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EA (db)75 80 85 75 80 85 7

35TABLE 18 – COOLING CAPACITIES 1--STAGE COOLING 8.5 TONS48TC*A09AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85

36TABLE 19 – COOLING CAPACITIES 1 --STAGE COOLING 10 TONS48TC*A12AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85

37TABLE 20 – COOLING CAPACITIES 2 --STAGE COOLING 10 TONS48TC*D12AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 85

38TABLE 21 – COOLING CAPACITIES 2 --STAGE COOLING 12.5 TONS48TC*D14AMBIENT TEMPERATURE85 95 105 115EAT (db) EAT (db) EAT (db) EAT (db)75 80 85 75 80 8

39TABLE 22 – STATIC PRESSURE ADDERS (FACTORY OPTIONS AND/OR ACCESSORIES)Economize r3 --- 6 T O N SCFM (in. wg)600 800 1000 1250 1500 1750 2000 2250 25

4MODEL NUMBER NOMENCLATURE1234567891011121314151617184 8 T C D A 0 4 A 1 A 5 -- 0 A 0 A 0____ ____ ____Unit Heat Type48 = Cooling/Gas Heat RTU Brand /

40FAN PERFORMANCETABLE 23 – 48TC**04 1 PHASE 3 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BHP RPM BH

41FAN PERFORMANCE (cont.)TABLE 25 – 48TC**04 3 PHASE 3 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

42FAN PERFORMANCE (cont.)TABLE 27 – 48TC**05 1 PHASE 4 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

43FAN PERFORMANCE (cont.)TABLE 29 – 48TC**05 3 PHASE 4 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

44FAN PERFORMANCE (cont.)TABLE 31 – 48TC**06 1 PHASE 5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

45FAN PERFORMANCE (cont.)TABLE 33 – 48TC**06 3 PHASE 5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

46FAN PERFORMANCE (cont.)TABLE 35 – 48TC**07 3 PHASE 6 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM BH

47FAN PERFORMANCE (cont.)TABLE 37 – 48TC**08 3 PHASE 7.5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM

48FAN PERFORMANCE (cont.)TABLE 39 – 48TC**09 3 PHASE 8.5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM

49FAN PERFORMANCE (cont.)TABLE 41 – 48TC**12 3 PHASE 10 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM B

5TABLE 1 – FACTORY--INSTALLED OPTIONS AND FIELD--INSTALLED ACCESSORIESCATEGORY ITEMFACTORYINSTALLEDOPTIONFIELDINSTALLEDACCESSORYCabinet Thru---the---b

50FAN PERFORMANCE (cont.)TABLE 43 – 48TC**14 3 PHASE 12.5 TON HORIZONTAL SUPPLYCFMAVAILABLEEXTERNALSTATICPRESSURE(in.wg)0.2 0.4 0.6 0.8 1.0RPM BHP RPM

51FAN PERFORMANCE (cont.)TABLE 45 – 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 5.0041phaseSta

52ECONOMIZER, BAROMETRI C RELI EF AND PE PERFORMANCE050010001500200025000 0.05 0.1 0.15 0.2 0.25 0.3RETURN DUCT STATIC PRESS URE (in. wg)RELIEF FLOW (

53ELECTRICAL INFORMATIONTABLE 46 – 48TC*A04 1--STAGE COOLING 3 TONSV --- P h --- H zVOLTAGERANGECOMP (ea) OFM (ea) IFMRLA LRA WATTS FLA TYPEMaxWATTSMa

54ELECTRICAL INFORMATION (cont.)TABLE 49 – 48TC*A07 1--STAGE COOLING 6 TONSV --- P h --- H zVOLTAGERANGECOMP (ea) OFM (ea) IFMRLA LRA WATTS FLA TYPEMa

55ELECTRICAL INFORMATION (cont.)TABLE 52 – 48TC*A09 1--STAGE COOLING 8.5 TONSV --- P h --- H zVOLTAGERANGECOMP (ea) OFM (ea) IFMRLA LRA WATTS FLA TYPE

56ELECTRICAL INFORMATION (cont.)TABLE 55 – 48TC*D14 2--STAGE COOLING 12.5 TONSV --- P h --- H zVOLTAGERANGECOMP (Cir 1) COMP (Cir 2) OFM (ea) IFMRLA L

57TABLE 56 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLANO C.O. or UNPWRD C.O.N

58TABLE 56 (cont.) MCA/M OCP DETERMINATION NO C.O. OR UNPWRD C.O.UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLANO C.O. or UNPWR

59TABLE 57 – MCA/MOCP DETERMINATION W/ PWRD C.O.UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLAw/ PWRD C.O.NO P.E. w/ P.E. (pwrd

6FACTORY OPTIONS AND/OR ACCESSORIESEconomizer (dry--bulb or enthalpy)Economizers save money. They bring in fresh, outside airfor ventilation; and prov

60TABLE 57 (cont.) MCA/M OCP DETERMINATION W/ PWRD C.O.UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLAw/ PWRD C.O.NO P.E. w/ P.E

61TYPICAL WIRING DIAGRAMSC08518Fig. 23 -- 1-- Stage Cooling Typical Power Diagram48TC

62TYPICAL WIRING DIAGRAMS (cont.)C08577Fig. 24 -- 2-- Stage Cooling Typical Power Diagram48TC

63C08524Fig. 25 -- 1-- Stage Typical Wiring Diagram48TC

64C08578Fig. 26 -- 2-- Stage Typical Wiring Diagram48TC

65SEQUENCE OF OPERATIONGeneralThe sequence below describes the sequence of operationfor an electro--mechanical unit with and without a factoryinstalle

66On the initial power to the EconoMi$er IV control, it willtake the damper up to 2 1/2 minutes before it begins toposition itself. After the initial

67COMPCOND COILHUMIDI-MIZER COILEVAP COILINDOOR ENTERINGAIROUTDOOR AIRMETERINGDEVICECLOSED VALVEOPEN VALVERH1.xRH2.xCV.xa48-8173C07120Subcooling Mode

68GUIDE SPECIFICATIONS -- 48TC**04--14Note about this specification:Carrier wrote this specification in the 2004 version of the “Masterformat” as publ

696. Shall accept a CO2sensor in the conditioned space, and be Demand Control Ventilation (DCV) ready.7. Shall provide the following outputs: econom i

7The WeatherMaker 48TC--04--07 ooftop couple d with theHumidi --MiZer system is capable of operating in normaldesign cooling mode, subcooling mode, an

704. The heat exchanger shall be controlled by an integrated gas controll er (IGC) microprocessor. See heat exchangersection of this specification.5.

719. Unit shall be designed in accordance with ISO 9001:2000, and shall be manufactured in a facility registered byISO 9001:2000.10. Roof curb shall b

72b. Thru--the --base capability(1.) Standard unit shall have a thru--t he--base gas--line location using a raised, embossed portion of the unitbasepa

735. Optional Low NOxHeat Exchanger constructiona. Low NOxreduction shall be provided to reduce nitrous oxide emissions to meet California’s Air Quali

74b. Coating process shall ensure complete coi l enca psulation, including all exposed fin edges.c. E--coat thickne ss of 0.8 to 1.2 mil with top coa

75c. Shall have inherent thermal overload protection with an automatic reset feature.d. Shall use a shaft--down design on 04 to 12 models and shaft--u

76(2.) Hot gas reheat mode shall mix a portion of the hot gas from the discha rge of the com pressor with the hotliquid refrigerant leaving the conden

7714. Roof Curbs (Vertical):a. Full perimeter roof curb with exhaust capability providing separate air streams for energy recovery from theexhaust air

78Copyright 2009 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 04/ 09Manufacturer reserves the right to

8TABLE 2 – ARI COOLING RATING TABLE 1--STAGE COOLINGUNITCOOLINGSTAGESNOM.CAPACITY(TONS)NETCOOLINGCAPACITY(MBH)TOTALPOWER (KW)SEER EER IPLVA04 1 3 34.6

9TABLE 4 – HEATING RATING TABLE -- NATURAL GAS & PROPANEUnits Gas HeatAL/SS HEAT EXCHANGERTEMP RISE(DEG F)THERMALEFFICIENCY(%)AFUE(%)INPUT / OUTPU