Carrier 48TC Instruction Manual

48TC*DSingle Package Rooftop, Gas Heating/Electric Cooling Unitwith Puronr (R---410A) Refrigerant:Sizes 08, 12, and 14 with NOVATION™ CoilSizes 08 ---

10A-B0.5” (13)B-C1.0” (25)A-C1.0” (25)MAXIMUM ALLOWABLEDIFFERENCE IN. (MM)C06110Fig. 5 -- Unit Leveling TolerancesStep 5 — Field Fabricate DuctworkCab

11PositioningonCurb—Position unit on roof curb so that the following clearancesare maintained:1/4in. (6.4 mm) clearance between theroof curb and the b

12Two Position Damper Hood Removal and Setup --Factory Option1. The hood is shipped in knock--down form andassembled to a metal support tray using pla

13Economizer Hood and Two--Position Hood —NOTE: If the power exhaust accessory is to be installedon the unit, the hood shipped with the unit will not

142000 ft (610 m) and/or for use with liquefied petroleumfuel. See accessory kit installation instructions regardingthese accessories.NOTE: Furance ga

159” (229mm) minUnion Shut OffValveDripLegThru-Curb AdapterUnit Base RailC07469Fig. 17 -- Gas Piping with Thru--Curb AccessoryDripLegShut OffValveUnio

16FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death and/or property damage.S Connect gas pipe to unit using

17Step 12 — Make Electrical ConnectionsELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Do not use gas pi

18C IFCDisconnect factory test leadsand discard.13 13L1L2 L3208/230-3-60460-3-60575-3-60Units Without Disconnect OptionUnits With Disconnect Option13

19The primary leads to the convenience outlet transformerare not factory--connected. Selection of primary powersource is a customer--option. If local

2FIRE, EXPLOSION HAZARDFailure to follow this warning could result in personalinjury or death.Disconnect gas piping from unit when leak testing atpres

20accessory. Locate the thermostat accessory on a solid wallin the conditioned space to sense average temperature inaccordance with the thermostat ins

21PremierLinkt (Factory--Option) —C08199Fig. 30 -- PremierLink ControllerThe PremierLink controller (see Fig. 30) is compatiblewith Carrier Comfort Ne

22NOTE: The sensor must be mounted in the dischargeairstream downstream of the cooling coil and any heatingdevices. Be sure the probe tip does not com

23POWER24 VACNCNORJ-45RJ-45 106DDC C09604Fig. 32 -- PremierLink Wiring Schematic48TC*D

24234561SW1SENBRN (GND)BLU (SPT)RED(+)WHT(GND)BLK(-)CCN COMSENSOR WIRINGC08201Fig. 33 -- T--55 Space Temperature Sensor WiringSEN J6-7J6-613TB1 PLSENC

25Table 4 – Space Sensor ModeTB1 TERMI NAL FIELD CONNECTION INPUT SIGNAL1 T 5 5 --- S E N / T 5 6 --- S E N Analog (10k thermistor)2 RMTOCC Discrete,

26Connect Thermostat — A 7--wire thermostat connectionrequires a 24--v power source and a common connection.Use the R and C terminals on the CTB’s THE

27The CO2sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2sens

28Smoke Detector/Fire Shutdown (FSD) — This function isavailable only when PremierLink is configured for(Space) Sensor Mode. The unit is factory--wire

29may not exceed 4000 ft, with no more than 60 totaldevices on any 1000--ft section. Optically isolated RS--485repeaters are required every 1000 ft.NO

3Horizontal Connections / EconomizerVertical Connections / EconomizerC08563Fig. 1 -- Unit Dimensional Drawing – 08, 09 and 12 Size Units48TC*D

30RTU--MP CONTROL SYSTEMThe RTU--MP controller, see Fig. 49, provides expandedstand--alone operation of the HVAC system plusconnection and control thr

31C09605Fig. 51 -- RTU--MP System Control Wiring Diagram48TC*D

32Table 8 – RTU--MP Controller Inputs and OutputsPOINT NAMEBACnet OBJECTNAMETYPE OF I/OCONNECTION PINNUMBERSINPUTSSpace Temperature Sensor sptsens AI

33high-- and low--voltage wiring. Pass the control wiresthrough the hole provided in the corner post, then feed thewires thorough the raceway to the R

34in the space or in return duct, with and without LCDdisplay, and in combination with space temperaturesensors. Sensors use infrared technology to me

355, 8, or 9 to Remote Occupancy and normally open (N/O)or normally closed (N/C).Also set MENU→Schedules→occupancy source to DIon/off. Input 8 or 9 is

36Local AccessBACview6HandheldThe BACview6is a keypad/display interface used toconnect to the RTU--MP to access the control information,read sensor va

37Table 9 – LEDsThe LEDs on the RTU--MP show the status of certain functionsIf this LED is on... Status is...Power The RTU MP has powerRx The RTU MP i

38SMOKE DETECTORSSmoke detectors are available as factory--installed optionson 48TC*D models. Smoke detectors may be specified forSupply Air only or f

39The sensor uses a process called differential sensing toprevent gradual environmental changes from triggeringfalse alarms. A rapid change in environ

4C08566Fig. 1 -- Unit Dimensional Drawing – 08, 09 and 12 Size Unit (cont.)48TC*D

40Completing Installation of Return Air SmokeSensor:1. Unscrew the two screws holding the Return AirSensor detector plate. See Fig. 65. Save the screw

41Step 13 — Humidi--MiZert –Space RH Controller —The Humidi--MiZer dehumidification system requires afield--supplied and --installed space relative hu

42POWER24 VACNCNORJ-45RJ-45 106DDC HUMIDISTATC09606Fig. 69 -- Typical Humidi--MiZer Adaptive Dehumidification System Humidistat WiringRcRhW1GY2CO/W2

43Table 10 – Unit Wire/MOCP Sizing DataUNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLANO C.O. or UNPWRD C.O.NO P.E. w/ P.E. (pwr

44Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITNOM.V --- P h --- H zIFMTYPECOMBUSTIONFAN MOTORFLAPOWEREXHAUSTFLAw/ PWRD C.O.NO P.E. w/ P.E. (pwrd f

45Legend and Notes for Table 10LEGEND:CO --- Convenient outletDISC --- DisconnectFLA --- Full load ampsIFM --- Indoor fan motorLRA --- Locked rotor am

46Economizer 2 Position DamperUnit Without Economizer or2 Position DamperC08631Fig. 71 -- EconoMi$ert IV WiringStep 14 — Adjust Factory--Installed Opt

4748TC*D

48Copyright 2010 Carrier Co rp. D 7310 W. Mo rris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 01/10Manufacturer reserves the right to

5Horizontal Connections / EconomizerVertical Connections / EconomizerC08567Fig. 2 -- Unit Dimensional Drawing – 14 Size Unit48TC*D

6C08568Fig. 2 -- Unit Dimensional Drawing – 14 Size Unit (cont.)INSTALLATIONJobsite SurveyComplete the following checks before installation.1. Consult

7Although unit is weatherproof, avoid locations that permitwater from higher level runoff and overhangs to fall ontothe unit.Locate mechanical draft s

8Install insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit. The accessory thru

948TC*D08 - 1448TC*D08 - 14UNIT SIZEROOFCURBACCESSORYCRRFCURB003A01CRRFCURB004A011’ - 2”(356)2’ - 0”(610)C08546Fig. 4 -- Roof Curb Details48TC*D