Carrier 50TCQA Instruction Manual

50TCQASingle Package RooftopHeat Pumpwith Puronr (R---410A) RefrigerantS i z e s 0 4 --- 0 7Installation InstructionsNOTE: Read the entire instruction

10Economize r 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

11NOTE: Trap should be deep enough to offset maximum unit staticdifference. A 4” (102) trap is recommended.MINIMUM PITCH1” (25mm) PER10’ (3m) OF LIN

12Units with Factory--Installed Disconnect —The factory--installed option disconnect switch is locatedin a weatherproof enclosure located under the ma

13Mount the weat herproof cover to the backing plate asshown in Fig. 18. Remove two slot fillers in the bottom ofthe cover to permit service tool cord

14LOW VOLTAGECONDUITCONNECTORHIGH VOLTAGECONDUITCONNECTORC08637Fig. 20 -- Thru--Base Connection FittingsField--supplied and field--installed liquidtig

15RACEWAYHOLE IN END PANEL (HIDDEN)C08027Fig. 22 -- Fiel d Control Wiring RacewayElectric Heaters50TCQ units may be equipped with fie ld--installedacc

16TRACKFLANGEC08135Fig. 25 -- Typical Module InstallationSingle Point Boxes and Supplementary Fuses — Whenthe unit MOCP device value exceeds 60--A, un

17PremierLinkt (Factory--Option) —C08199Fig. 28 -- PremierLink ControllerThe PremierLink controller (see Fig. 28) is compatiblewith Carrier Comfort Ne

18C09014Fig. 30 -- PremierLink Wiring Schematic50TCQA

19Outdoor Air Temperature (OAT) Sensor — The OAT isfact ory--mounted in the EconoMi$er2 (FIOP oraccessory). It is a nominal 10k ohm thermistor attache

2ELECTRICAL SHOCK HAZARDFailure to follow this warning could cause personalinjury or death.Before performing service or maintenance operationson unit,

20GJ4-12J4-10J4-8Y1Y22RR46J4-6J4-4W2C810C SPACETHERMOSTATPL CTBTHERMOSTATW1TB1 CTBTHERMOSTATC08119Fig. 35 -- Space Thermostat Conne

21Table 4 – Space Sensor ModeTB1 TERMINAL FIELD CONNECTION INPUT SIGNAL1 T 5 5 --- S E N / T 5 6 --- S E N Analog (10k thermistor)2 RMTOCC Discrete, 2

22If the 50TCQ unit has an economizer system andfree--cooling operation is required, a sensor representingReturn Air Temperature must also be connecte

238765432121HG24 VACOR24 VDCNCALARMRELAYCONTACTSCOMNO}0-10VDCSIG COM4-20mA++-+-J3 J4C08635Fig. 38 -- Indoor/Outdoor Air Quality (CO2)Sensor(33ZCSENCO2

24On 50TCQ units equipped with factory--installed SmokeDetector(s), the smoke detector controller implements theunit shutdown through its NC contac t

25At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 devices maximum. Bus lengthmay not exceed 4000 ft, with no more th

26RTU--MP control systemThe RTU--MP cont roller, see Fig. 47, provides expandedstand--alone operation of the HVAC system pl usconnec tion and control

27C09015Fig. 49 -- RTU--MP System Control Wiring Diagram50TCQA

28Table 8 – R TU--MP Controller Inputs and OutputsPOINT NAMEBACnet OBJECTNAMETYPE OF I/OCONNECTION PINNUMBERSINPUTSSpace Temperature Sensor sptsens AI

29The raceway provides the UL required clearance betweenhigh-- and low--voltage wiring. Pass the control wiresthrough the hole provided in the corner

3Horizontal Connections / EconomizerVertical Connections / EconomizerC09001Fig. 1 -- Unit Dimensional Drawing – 04 — 07 Size Units50TCQA

30entha lpy sensor and the (SR) terminal on the enthalpycontroller.NOTE: The enthalpy control must be set to the “D”setting for differential enthalpy

31Remote OccupancyThe remote occupancy accessory is a field --installedaccessory. This accessory overrides the unoccupied modeand puts the unit in occ

32Local AccessBACview6HandheldThe BACview6is a keypad/display interface used toconnect to the RTU--MP to access the control information,read sensor va

33Table 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

34terminal for connecting to the controller. Each sensor hasfour LEDs (for Power, Trouble, Alarm and Dirty) and amanua l test/ reset button (on the le

35downward, into the return air stream. The sampling tube isconnec ted via tubing to the return air sensor that ismounted on a bracket high on the par

36Table 10 – Unit Wire/MOCP Sizing DataUNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER NO C.O. or UNPWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwrd fr/un

37Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER w/ PWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwrd fr/unit)

38Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER NO C.O. or UNPWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwr

39Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER w/ PWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwrd fr/unit)

4C09002Fig. 1 -- Unit Dimensional Drawing – 04 — 07 Size Unit (cont.)INSTALLATIONJobsite SurveyComplete the following checks before installation.1. Co

40Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER NO C.O. or UNPWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwr

41Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER w/ PWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwrd fr/unit)

42Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER NO C.O. or UNPWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwr

43Table 10 — Unit Wire/MOCP Sizing Data (cont)UNITN O M . V --- P H --- H ZIFMTYPEELECTRIC HEATER w/ PWRD C.O.Nom(kW)FLANO P.E. w/ P.E. (pwrd fr/unit)

44Legend and Notes for Table 10LEGEND:CO --- Convenient outletDISC --- DisconnectFLA --- Full load ampsIFM --- Indoor fan motorLRA --- Locked rotor am

45Step 12 — Install AccessoriesAvailable accessories include:Roof CurbThru--base connection kit (must be installed before unitis set on curb)Manual ou

4650TCQA

4750TCQA

48Copyright 2009 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed i n U.S.A. Edition Date: 02/10/09Manufacturer reserves the right

5Roof mount —Check building codes for weight distributionrequirements. Unit operating weight is shown in Table 1.Step 2 — Plan for Sequence of Unit In

650TCQA04-07ROOFCURBACCESSORYCRRFCURB001A02CRRFCURB002A021’ - 2”[356]2’ - 0”[610]UNIT SIZEC08548Fig. 3 -- Roof Curb Details50TCQA

7A-B0.5” (13)B-C1.0” (25)A-C1.0” (25)MAXIMUM ALLOWABLEDIFFERENCE IN. (MM)C06110Fig. 4 -- Unit Leveling TolerancesStep 5 — Field Fabricate DuctworkCabi

8PositioningonCurb—Position unit on roof curb so that the following clearancesare maintained:1/4in. (6.4 mm) clearance between theroof curb and the ba

9Two Position Damper H ood Removal and Setup --Factor y Option1. The hood is shipped in knock--down form andassembled to a metal support tray using pl