Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS HEATING EW User Manual

48LCUltra High EfficiencyGas Heat/El e ct ric Cool i ng Packaged Rooft op3to5NominalTonsProduct DataC11536Carrier’s Most Efficient Commercial Rooftop

10Table 5 – HEATING RATING TABLE -- LOW NOX148LCGAS HEATLOW NOx HEAT EXCHANGERTEMP RISE(DEG F)THERMALEFFICIENCY (%)INPUT / OUTPUTSTAGE 1 (MBH)INPUT /

11Table 8 – PHYSICAL DATA (COOLING) 3 -- 5 TONS48LC*004 48LC*005 48LC*006Refrigeration System#Stages/#Comp./Type 2/1/Scroll 2/1/Scroll 2/1/ScrollR---4

12Table 9 – PHYSICAL DATA (HEATING) 3 -- 5 TONS48LC**04 48LC**05 48LC**06Gas Connection#ofGasValves 1 1 1Nat. gas supply line press (in. w.g.)/(PSIG)

13CURBS & WEIGHTS DIMENSIONSC12128Fig. 3 -- Dimensions 48LC 04--0648LC

14CURBS & WEIGHTS DIMENSIONS (cont.)C12129Fig. 4 -- Dimensions 48LC 04--0648LC

15CURBS & WEIGHTS DIMENSIONS (cont.)CBADC08337LOCATION DIMENSION CONDITIONA48--- in (1219 mm)18--- in (457 mm)18--- in (457) mm12--- in (305 mm)Un

16CURBS & WEIGHTS DIMENSIONS -- 48LC 04--06 (cont.)CONNECTORPKG. ACCY.BCD ALTDRAINHOLEGAS POWER CONTROLACCESSORYPOWERCRBTMPWR001A011’-911/16”[551]

17OPTIONS & ACCESSORY WEIGHTSOPTION / ACCESSORYOPTION / ACCESSORY WEIGHTS04 05 06lb kg lb kg lb kgPower Exhaust --- vertical 50 23 50 23 50 23Powe

18APPLICATION DATAMin operating ambient temp (cooling):In mechanical cooling mode, your Carrier rooftop unit cansafely operate down to an outdoor ambi

19APPLICATION DATA (cont.)Sizing a rooftopBigger isn’t necessarily better. While an air conditionerneeds to have enough capacity to meet the design lo

2TABLE OF CONTENTSPAGEFEATURES AND BENEFITS 4...MODEL NUMBER NOMENCLATURE 5...FACTORY OPTIONS AND/OR ACCESSORIES 7...AHRI

20Table 10 – COOLING CAPACITIES -- FIRST STAGE, PART LOAD 3 TONS04 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (dB) EA (dB)75 8

21Table 11 – COOLING CAPACITIES -- SECOND STAGE, FULL LOAD 3 TONS04 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (DB) EA (dB)75

22Table 12 – COOLING CAPACITIES -- FIRST STAGE PART LOAD 4 TONS05 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (dB) EA (dB)75 80

23Table 13 – COOLING CAPACITIES -- SECOND STAGE FULL LOAD 4 TONS05 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (dB) EA (dB)75 8

24Table 14 – COOLING CAPACITIES -- FIRST STAGE PART LOAD 5 TONS06 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (dB) EA (dB)75 80

25Table 15 – COOLING CAPACITIES -- SECOND STAGE FULL LOAD 5 TONS06 SIZEAMBIENT TEMPERATURE85 95 105 115 125EA (dB) EA (dB) EA (dB) EA (dB) EA (dB)75 8

26ECONOMIZER, BAROMETRIC RELIEF AND PE PERFORMANCEVertical Application050010001500200025000 0.05 0.1 0.15 0.2 0.25 0.3RETURN DUCT STATIC PRESSURE (in.

27GENERAL FAN PERFORMANCE NOTES:1. Interpolation is permissible. Do not extrapolate.2. External static pressure is the static pressure difference betw

28FAN PERFORMANCEDIRECT DRIVE -- ECM (Multi--Speed) INDOOR FAN MOTORTable 16 – 48LC*004 Vertical Unit--Direct DriveSpeed(Torque) TapCFM ESP BHP1750 0.

29FAN PERFORMANCE (cont.)DIRECT DRIVE -- ECM (Multi--Speed) INDOOR FAN MOTOR (cont.)Table 18 – 48LC*005 Vertical Unit--Direct DriveSpeed(Torque) TapCF

3CARRIER’S MOST EFFICIENT COMMERCIAL ROOFTOP EVER DESIGNEDIdeal for Replacement or New Construction1752463C12160Fig. 1 -- 48LC Front View891011121314C

30FAN PERFORMANCE (cont.)DIRECT DRIVE -- ECM (Multi--Speed) INDOOR FAN MOTOR (cont.)Table 20 – 48LC*006 Vertical Unit--Direct DriveSpeed(Torque) tapCF

31FAN PERFORMANCE (BELT DRIVE WITH VFD CONTROLLER & DISPLAY)Table 22 – 48LC*004 3 PHASE 3 TON VERTICAL SUPPLYCFMAvailable External Static Pressure

32FAN PERFORMANCE (BELT DRIVE WITH VFD CONTROLLER & DISPLAY)cont.Table 24 – 48LC*005 3 PHASE 4 TON VERTICAL SUPPLYCFMAvailable External Static Pre

33FAN PERFORMANCE (BELT DRIVE WITH VFD CONTROLLER & DISPLAY)cont.Table 26 – 48LC*006 3 PHASE 5 TON VERTICAL SUPPLYCFMAvailable External Static Pre

34FAN PERFORMANCE (cont.)Table 28 – PULLEY ADJUSTMENTUNITMOTOR/DRIVECOMBOMOTOR PULLEY TURNS OPEN (RPM)0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.004Sta

35ELECTRICAL INFORMATIONTable 29 – 48LC*004 3TONSUNIT V --- P h --- H zVOLTAGE R ANGE COMP 1 OFM (ea) IFMMIN MAX RLA LRA WATTS FLA TYPEEFF at FullLoad

36MCA/MOCPTable 32 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O. 3 -- 5 TONSUNITNOM.V --- P h --- H zIFM TYPENO C.O. or UNPWR C.O.NO P.E. w/ P.E. (p

37MCA/MOCP (cont.)Table 33 – MCA/MOCP DETERMINATION WITH POWERED CONVENIENCE OUTLET 3 -- 5 TONSUNITNOM.V --- P h --- H zIFM TYPEw/ PWRD C.O.NO P.E. w/

38MCA/MOCP (cont.)Table 34 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O. 3 -- 5 TONSUNITNOM.V --- P h --- H zIFM TYPENO C.O. or UNPWR C.O.NO P.E. w/

39MCA/MOCP (cont.)Table 35 – MCA/MOCP DETERMINATION WITH POWERED CONVENIENCE OUTLET 3 -- 5 TONSUNITNOM.V --- P h --- H zIFM TYPEw/ PWRD C.O.NO P.E. w/

4UNIT FEATURESS Two stage cooling capacity control scroll compressors with crankcase heaterS Belt drive indoor fan and pulley system with Variable Fre

40SEQUENCE OF OPERATIONGeneralThe sequence below describes the sequence of operationfor an electromechanical unit with and without a factoryinstalled

41SEQUENCE OF OPERATION (cont.)When the EconoMi$er X control is in the occupied modeand a call for cooling exists (Y1 on the thermostat), thecontrol w

42SEQUENCE OF OPERATION (cont.)Max Comfort DehumidificationWhen the Dehumidification Control Type set toMaximum Comfort, the control will try to satis

43GUIDE SPECIFICATIONS -- 48LC*004--06Note about this specification:This specification is in the “Masterformat” as published by the Construction Speci

4411. Economizer control (optional).12. Control multi capacity stages13. Unit shall be complete with self--contained low voltage control circuit.14. U

452. Low--pressure switch.a. Units with 2 compressors shall have different sized connectors for the circuit 1 and circuit 2 low and highpressure switc

4612. Unit shall be designed in accordance with UL Standard 1995, including tested to withstand rain.13. Unit shall be constructed to prevent intrusio

479. Electrical Connectionsa. All unit power wiring shall enter unit cabinet at a single, factory--prepared, knockout location.b. Thru--the--base capa

48c. Shall have permanently lubricated sealed bearings.d. Shall have inherent thermal overload protection.e. Shall have an automatic reset feature.23

49b. When the plug is removed, the gauge access port shall enable maintenance personnel to route their pressuregauge lines.c. This gauge access port s

5MODEL NUMBER NOMENCLATURE1234567891011121314151617184 8 L C D 0 0 6 A 0 A 0 -- 0 A 0 A 0____ ____ ____Unit Type Brand / Packaging48 = Gas Heat Packag

50c. Shall have inherent thermal overload protection with an automatic reset feature.d. Shall use a shaft--down design.e. Shall be ECM design.2. Conde

51q. Actuator shall be direct coupled to economizer gear. No linkage arms or control rods shall be acceptable.r. Economizer controller shall provide i

52b. Formed galvanized steel with wood nailer strip and shall be capable of supporting entire unit weight.c. Permits installation and securing of duct

6Table 1 – FACTORY--INSTALLED OPTIONS AND FIELD--INSTALLED ACCESSORIESCATEGORY ITEMFACTORYINSTALLEDOPTIONFIELDINSTALLEDACCESSORYCabinetThru---the---ba

7FACTORY OPTIONS AND/OR ACCESSORIESEconomizer (dry--bulb or enthalpy)Economizers save money. They bring in fresh, outside airfor ventilation; and prov

8FACTORY OPTIONS AND/OR ACCESSORIES (cont.)Flue Discharge DeflectorThe flue discharge deflector is a useful accessory whenflue gas recirculation is a

9Table 2 – AHRI COOLING RATING TABLE 2--STAGE COOLING W/DIRECT DRIVE ECM INDOOR MOTOR48LCCOOLINGSTAGESNOM.CAPACITY(TONS)NETCOOLINGCAPACITY(MBH)TOTAL P