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United Technologies Carrier 50TCQD12 Installation Instructions Manual

Single package rooftop heat pump with puron (r-410a) refrigerant size 12
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50TCQD12
Single Package Rooftop
Heat Pump
with Puronr (R---410A) Refrigerant
Size 12
50TCQ units for installation in the United States contain use of Carrier's Staged Air Volume
(SAV™) 2-speed indoor fan control system. This complies with the U.S. Department of
Energy (DOE) efficiency standard of 2018.
50TCQ units for installation outside the United States may or may not contain use of the SAV
2-speed indoor fan control system as they are not required to comply with the U.S.
Department of Energy (DOE) efficiency standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the
Variable Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation,
Setup and Troubleshooting manual.
NOTE: Read the entire instruction manual before starting
the installation.

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  • Page 1: Table Of Contents

    50TCQD12 Single Package Rooftop Heat Pump with Puronr (R---410A) Refrigerant Size 12 Installation Instructions 50TCQ units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speed indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of 2018.
  • Page 2 EconoMi$er X (Factory- - Installed Option) ..Economizer Controls ......Product Description .

  • Page 3: Safety Considerations

    SAFETY CONSIDERATIONS WARNING Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical ELECTRICAL SHOCK HAZARD shock or other conditions which may cause personal Failure to follow this warning could cause personal injury or property damage. Consult a qualified installer, injury or death.

  • Page 4: Rated Indoor Airflow (Cfm)

    Rated Indoor Airflow (cfm) Model Number Full Load Airflow (cfm) 50TCQD12 3500 The table to the right lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document. Position: 9 10 11 12 13 14 15 16 17 18 Example: –...
  • Page 5 C12042 Fig. 2 - - Unit Dimensional Drawing – 12 Size Unit...
  • Page 6 C12043 Fig. 2 - - Unit Dimensional Drawing – 12 Size Unit (cont)

  • Page 7: Refrigeration System Components

    C08337 LOCATION DIMENSION CONDITION 48--- in (1219 mm) Unit disconnect is mounted on panel 18--- in (457 mm) No disconnect, convenience outlet option 18--- in (457 mm) Recommended service clearance 12--- in (305 mm) Minimum clearance 42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36--- in (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
  • Page 8 Table 2 – Heating Mode (each circuit) Table 3 – Defrost Mode Component Status/Position Component Status/Position Defrost Thermostat Closed Reversing Valve De--- energized Outdoor Fan(s) Check Valve A Open Reversing Valve Energized Check Valve B Closed Check Valve A Closed Check Valve C Open Check Valve B...

  • Page 9: Installation

    INSTALLATION Curb- - Mounted Installation — Install curb Jobsite Survey Install field- - fabricated ductwork inside curb Complete the following checks before installation. Install accessory thru- - base service connection package (affects curb and unit) (refer to accessory installation 1. Consult local building codes and the NEC (National instructions for details) Electrical Code) ANSI/NFPA 70 for special installa- tion requirements.
  • Page 10 C13311 Fig. 6 - - Roof Curb Details...

  • Page 11: Slab Mount (Horizontal Units Only)

    For Units with Accessory Electric Heaters — Horizontal applications require a minimum clearance to combustible surfaces of 1- - in. (25 mm) from duct for first 12- - in. (305 mm) away from unit. Vertical applications do not require a minimum clearance is not required around ductwork.

  • Page 12: Step 7 - Convert To Horizontal And Connect

    C06005 DIMENSIONS MAX WEIGHT UNIT 50TCQD12 1695 88.0 2235 36.5 49.5 1255 NOTES: 1. Dimensions in ( ) are in millimeters. 2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity.

  • Page 13: Economizer Hood And Two- - Position Hood

    past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 14. 6. Caulk the ends of the joint between the unit top panel and the hood top. 7. Replace the filter access panel. SIDE PANEL FILTER ACCESS PANEL...

  • Page 14: Step 9 - Install External Condensate Trap And Line

    Step 9 — Install External Condensate Trap and Step 10 — Make Electrical Connections Line WARNING The unit has one -in. condensate drain connection on the end of the condensate pan and an alternate connection ELECTRICAL SHOCK HAZARD on the bottom. See Fig. 15. Unit airflow configuration Failure to follow this warning could result in personal does not determine which drain connection to use.
  • Page 15 a50--- 9692 Fig. 17 - - Typical 50TCQ Control Wiring Diagram...
  • Page 16 a50--- 9693 Fig. 18 - - Typical 50TCQ 12 Power Wiring Diagram (208/230V 3 Phase 60Hz unit shown)

  • Page 17: Units With Factory- - Installed

    Units Without Disconnect Option (3 Phase Indoor Motor) (1 Phase Indoor Motor and 1 Phase Unit) Disconnect 208/230-1-60 208/230-3-60 C12284 460-3-60 Fig. 21 - - Location of Non- - Fused Disconnect Enclosure 575-3-60 To field install the NFD shaft and handle: Units With Disconnect Option 1.

  • Page 18: Units Without Factory- - Installed

    Units without Factory- - Installed Installing Weatherproof Cover: weatherproof Non- - Fused Disconnect — while-in-use cover for the factory-installed convenience outlets is now required by UL standards. This cover cannot When installing units, provide a disconnect switch per be factory-mounted due its depth; it must be installed at unit NEC (National Electrical Code) of adequate size.

  • Page 19: Factory- - Option Thru- - Base Connections

    primary leads can be connected at the line- - side terminals on Code Article 210, Branch Circuits, for use of convenience the unit- - mounted non- - fused disconnect or HACR breaker outlets. switch; this will provide service power to the unit when the Factory- - Option Thru- - Base Connections —...

  • Page 20: Field Control Wiring

    Field Control Wiring — Central Terminal Board The 50TCQD unit requires an external temperature control The Central Terminal Board (CTB) is a pass through device. This device can be a thermostat (field- - supplied) or a connection point. The CTB provides the capability to add PremierLinkt controller (available as factory- - installed factory- - installed options and field- - installed accessories to option or as field- - installed accessory, for use on a Carrier...
  • Page 21 Table 5 – 50TCQ Defrost Board I/O and Jumper Configurations Inputs Point Name Type of I/O Connection Pin Number Unit Connection Note G Fan DI, 24Vac P2--- 3 CTB--- G Y1 Cool 1 DI, 24Vac P2--- 5 CTB--- Y1 Y2 Cool 2 DI, 24Vac P2--- 4 CTB--- Y2...

  • Page 22: Unit Without Thru- - Base Connection Kit

    Table 6 – DIP Switch Position Switch No. 60 minutes 30 minutes 90 minutes 120 minutes Fan Delay (Factory default) Defrost — The defrost control mode is a time/temperature RACEWAY sequence. There are two time components: The continuous run period and the test/defrost cycle period. The temperature component is provided by Defrost Thermostat 1 and 2 (DFT1 and DFT2) mounted on the outdoor coil.

  • Page 23: Single Point Boxes And Supplementary Fuses

    Table 7 – Heater Model Number Bare Heater Model Number Heater Sales Package P/N Includes: Bare Heater Carton and packing materials Installation sheet Unit heaters are marked with Heater Model Numbers. But DISCONNECT MOUNTING LOCATION heaters are ordered as and shipped in cartons marked with a corresponding heater Sales Package part number.

  • Page 24: Low- - Voltage Control Connections

    Low- - Voltage Control Connections — DEFROST Run the low- - voltage control leads from the heater BOARD module(s) - - VIO and BRN (two of each if two modules are installed) - - to the 4- - pole terminal board TB4 located on the heater bulkhead to the left of Heater #1.

  • Page 25: Economi$Er R X (Factory- -Installed Option)

    EconoMi$er X (Factory- -Installed Option) Specifications W7220 Economizer Module — The module is designed for use with 2 to 10 Vdc or bus communicating actuator. The module includes terminals for CO sensor, mixed air sensor, and an outdoor dry bulb sensor.

  • Page 26: Outputs

    Outputs — Table 8 – Economizer Module - - Left Hand Terminal Blocks Actuator signal: 2- - 10 Vdc; minimum actuator impedance is 2k ohm; bus two- - wire output for bus communicating Label Type Description actuators. Top Left Terminal Block Exhaust fan, Y1, Y2 and AUX1 O: 20k NTC Supply Air Temperature Sensor...

  • Page 27: Co 2 Sensor Wiring

    W7220 to power the CO sensor OR make sure the ground for the power supplies are common. See Fig. 41 for CO sensor wiring. SENSOR (HOT) BLACK YELLOW ANALOG BROWN Switch – Label ORANGE GREEN Switches POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

  • Page 28: Menu Structure

    To use the keypad when working with menus: S SYSTEM SETUP S Press the (Up arrow) button to move to the previous S ADVANCED SETUP menu. S CHECKOUT S Press the (Down arrow) button to move to the next S ALARMS menu.
  • Page 29 Table 12 - - Menu Structure (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value STATUS COOL Y1 ---IN ON/OFF FIRST STAGE COOLING DEMAND (Y1---IN) (cont) Y1---I signal from space thermostat or unitary controller for Cooling Stage 1. = 24 Vac on terminal Y1---I OFF = 0 Vac on terminal Y1---I COOL Y1 ---OUT...
  • Page 30 Table 12 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value SETPOINTS MAT SET 53_F 38 to 70_F; SUPPLY AIR SETPOINT (12_C) (3 to 21_C) Setpoint determines where the economizer will modulate the OA damper to increment by 1 maintain the mixed air temperature.
  • Page 31 Table 12 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value SYSTEM INSTALL 01/01/10 Display order = MM/DD/YY SETUP Setting order = DD, MM, then YY . UNITS DEG _F or _C Sets economizer controller in degrees Fahrenheit or Celsius.
  • Page 32 Table 12 - - Menu Structure (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value ADVANCED MAT T CAL 0.0_F +/ ---2.5_F SUPPLY AIR TEMPERATURE CALIBRATION SETUP (or C) (+/ ---1.4_C) Allows for the operator to adjust for an out of calibration supply air (cont) temperature (SAT) sensor OAS T CAL...
  • Page 33 Table 12 - - Menu Structure* (cont) Parameter Parameter EXPANDED PARAMETER NAME Menu Parameter Default Range and Increment Notes Value ALARMS(#) Alarms display only when they are active. The menu title “ALARMS(#)” includes the number of active alarms in parenthesis ( ). When using S---Bus sensors, “SYLK”...

  • Page 34: Sequence Of Operation

    Table 13 – Damper Minimum Position Settings and Readings on Checkout Menu Demand Controlled Ventilation Fan Speed Setpoints Checkout Sensor) MIN POS VMAX ---HS MIN POS H VMAX ---HS MIN POS L VMAX ---LS VENT MIN VMIN ---HS VENT MAX VMAX ---HS VENT MIN H VMIN ---HS...
  • Page 35 Table 16 – Enthalpy Operation No DCV (CO Sensor) - - 1 Speed Fan Demand Outside Air --- Controlled Good to Y1­I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed...
  • Page 36 Table 18 – Dry Bulb Operation No DCV (CO Sensor) - - 2 Speed Fan Demand Outside Air --- Controlled Good to Y1­I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) 0-v/Off 0-v/Off MIN POS L Closed 24-v/On 0-v/Off MIN POS L Closed...
  • Page 37 Table 20 – Enthalpy Operation No DCV (CO Sensor) - - 2 Speed Fan Demand Outside Air --- Controlled Good to Y1­I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied Ventilation economize? (DCV) 0-v/Off 0-v/Off MIN POS L Closed 24-v/On 0-v/Off MIN POS L Closed High...

  • Page 38: Enthalpy Settings

    ECONOMIXING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE C12015 Fig. 43 - - Single Enthalpy Curve and Boundaries Table 22 – Single Enthalpy and Dual Enthalpy High Limit Curves (EN Units) Point P1 Point P2 Enthalpy Temp.

  • Page 39: Checkout

    S The Y2 In call will be satisfied with the damper 100% NOTE: See “Interface Overview” on page 27 for information about menu navigation and use of the keypad. open and fan on high speed and the call will turn off To perform a Checkout test: 1.

  • Page 40: Premierlinkt Controller (Factory Option)

    PremierLinkt Controller (Factory- -Installed Option) C08199 Fig. 44 - - PremierLink Controller The PremierLink controller (see Fig. 44) is compatible The SAT is factory- - wired. The SAT probe is wire- - tied to with Carrier Comfort Networkr (CCN) devices. This the supply- - air opening (on the horizontal opening end) in control is designed to allow users the access and ability to its shipping position.
  • Page 41 a50--- 9645 Fig. 46 - - PremierLink Controller Wiring Schematic...

  • Page 42: Outdoor Air Temperature (Oat) Sensor

    Outdoor Air Temperature (OAT) Sensor — Connect T- - 55: See Fig. 47 for typical T- - 55 internal connections. Connect the T- - 55 SEN terminals to TB1 The OAT is factory- - mounted in the EconoMi$er 2 (FIOP terminals 1 and 3 (see Fig.

  • Page 43: Configure The Unit For Thermostat Mode

    If the 50TCQ unit has an economizer system and SPACE free- - cooling operation is required, a sensor representing THERMOSTAT THERMOSTAT Return Air Temperature must also be connected (field- - supplied and installed). This sensor may be a T- - 55 Space Sensor (see Fig.
  • Page 44 Table 24 – Space Sensor Mode TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL T55---SEN/T56---SEN Analog (10k thermistor) RMTOCC Discrete, 24VAC T55---SEN/T56---SEN Analog (10k thermistor) CMPSAFE Discrete, 24VAC T56---SET Analog (10k thermistor) Discrete, 24VAC LOOP---PWR Analog, 24VDC Discrete, 24VAC IAQ ---SEN Analog, 4---20mA FILTER Discrete, 24VAC IAQ ---COM/OAQ ---COM/RH ---COM...

  • Page 45: Economizer Controls

    Economizer Controls sensor. See Fig. 52. Connect the 4- - 20 mA terminal to terminal TB1- - 9 and connect the SIG COM terminal to Indoor Air Quality (CO Sensor) — terminal TB1- - 11. See Fig. 53. The indoor air quality sensor accessory monitors space IAQ Sensor carbon dioxide (CO ) levels.

  • Page 46: Space Relative Humidity Sensor

    Space Relative Humidity Sensor — Install the differential pressure switch in the supply fan section according to switch manufacturer’s instructions. The space relative humidity sensor is not used with Arrange the switch contact to be open on no flow and to 50TCQ models at this time.

  • Page 47: Ccn Communication Bus

    CCN Communication Bus — The communication bus shields must be tied together at each system element. If the communication bus is entirely The PremierLinkt controller connects to the bus in a daisy within one building, the resulting continuous shield must chain arrangement.

  • Page 48: Rtu Open Controller System

    RTU Open Controller System efficiency. RTU Open controller enables the unit to run in 100% stand- - alone control mode, Carrier’s i- - Vu Open network, or a Third Party Building Automation System The RTU Open controller is factory- - mounted in the (BAS).
  • Page 49 a50--- 9694 Fig. 62 - - RTU Open Controller System Wiring Diagram...

  • Page 50: Supply Air Temperature (Sat) Sensor

    Table 28 – RTU Open Controller Inputs and Outputs BACnet OBJECT CONNECTION POINT NAME TYPE OF I/O CHANNEL DESIGNATION NAME PIN NUMBER(S) DEDICATED INPUTS Space Temp / Zone Temp zone_temp AI (10K Thermistor) J20--- 1 and 2 Analog Input 10 Supply Air Temperature sa_temp AI (10K Thermistor)

  • Page 51: Space Temperature (Spt) Sensors

    Space Temperature (SPT) Sensors — Connect T- - 59: The T- - 59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 65 There are two types of SPT sensors available from Carrier, for internal connections at the T- - 59. Connect the SEN resistive input non-communicating (T55, T56, and T59) terminal (BLU) to the RTU Open controller at J20- - 1.

  • Page 52: Space Relative Humidity Sensor

    isolated 24 vac power source to the sensor and to connect controller communicates the smoke detector’s tripped the sensor to the RTU Open controller board terminals. status to the BAS building control. See Fig. 62 (RTU Open controller system wiring diagram). To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the Fire...

  • Page 53: Local Access

    The RTU Open controller can be set to communicate on Local Access four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set Wall Mounted Equipment Toucht Interface protocol and baud rate. Switches 1 and 2 (SW1 and SW2) The Equipment Touch interface is a wall mounted interface are used to set the board’s network address.

  • Page 54: Rtu Open Controller Troubleshooting

    Field Assistant LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the Field Assistant is a computer program included with the LEDs will appear. See Table 29. purchase of the Tech Tool Kit (USB-TKIT). This is a field Tech Tool to set-up, service, or download application NOTE: Refer to the RTU Open Multi- - Protocol Controller software to the RTU Open controller and includes a USB...

  • Page 55: Outdoor Air Enthalpy Control

    Outdoor Air Enthalpy Control Smoke Detectors (P/N 33CSENTHSW) Smoke detectors are available as factory- - installed options on 50TCQ models. Smoke detectors may be specified for The enthalpy control (33CSENTHSW) is available as a supply air only or for return air without or with economizer field- - installed accessory to be used with the EconoMi$er or in combination of supply air and return air.
  • Page 56 Step 1 Step 2 Step 3 C12283 Fig. 75 - - Completing Installation of Return Air Smoke Sensor Legend and Notes for Tables 30 and 31 LEGEND: Example: Supply voltage is 230-3-60 BRKR Circuit breaker C.O. Convenience outlet AB = 224 v DISC.

  • Page 59: Step 11 - Adjust Factory- -Installed Options

    Unit Without Economizer or Economizer 2 Position Damper 2 Position Damper C08631 Fig. 76 - - EconoMi$er IV Wiring Step 11 — Adjust Factory- -Installed Options EconoMi$er IV (with control and integrated barometric relief) Smoke Detectors — EconoMi$er2 (without control/for external signal and Smoke detector(s) will be connected at the Central Terminal integrated barometric relief) Board (CTB), at terminals marked “Smoke Shutdown”.

  • Page 60: Step 13 - Check Belt Tension

    Step 13 — Check Belt Tension 2. Set the tension gauge to the desired tension (see Table 1 in Fig. 77). Place the large O- - ring at that point. Measure the belt span length as shown in Fig. 77. 3.
  • Page 61 BLOWER PULLEY V-BELT MOTOR PULLEY MOTOR MOUNTING MOTOR MOUNTING BOLTS (4) PLATE C11504 Fig. 78 - - Belt Drive Motor Mounting...
  • Page 62 Catalog No: 50TCQ---12---02SI ECarrier Corporation 2017 Edition Date: 09/17 Printed in U.S.A. Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 50TCQ--- 12--- 01SI...

  • Page 63: Unit Start- - Up Checklist

    UNIT START-UP CHECKLIST (Remove and Store in Job File) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start---up checklist, use good judgement, follow safe practices, and adhere to the safety considerations/information as outlined in the preceding sections of this Installation Instructions document.
  • Page 64 TEMPERATURES OUTDOOR- - AIR TEMPERATURE _F DB (DRY BULB) RETURN- - AIR TEMPERATURE _F DB _F WB (WET BULB) HEAT SUPPLY AIR TEMPERATURE PRESSURES REFRIGERANT SUCTION CIRCUIT A PSIG CIRCUIT B PSIG REFRIGERANT DISCHARGE CIRCUIT A PSIG CIRCUIT B PSIG j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS GENERAL j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS (IF EQUIPPED)

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