Carrier 50HCQ12 Installation Instructions Manual
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Carrier 50HCQ12 Installation Instructions Manual

Carrier 50HCQ12 Installation Instructions Manual

Single package rooftop with puron (r-410a) refrigerant size 12
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50HCQ12
Single Package Rooftop
Heat Pump
with Puronr (R---410A) Refrigerant
Size 12
NOTE: Read the entire instruction manual before starting
the installation

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Summary of Contents for Carrier 50HCQ12

  • Page 1: Table Of Contents

    50HCQ12 Single Package Rooftop Heat Pump with Puronr (R---410A) Refrigerant Size 12 Installation Instructions NOTE: Read the entire instruction manual before starting Electric Heaters ......

  • Page 2: Safety Considerations

    Smoke Detectors ......WARNING System ........Controller .
  • Page 3 Vertical Connections / Economizer Horizontal Connections / Economizer C10845 Fig. 1 - - Unit Dimensional Drawing – 12 Size Unit...

  • Page 4: Installation

    C10846 Fig. 1 - - Unit Dimensional Drawing – 12 Size Unit (cont.) INSTALLATION Jobsite Survey 18” Complete the following checks before installation. (457) 42" (1067) 1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installa- tion requirements.

  • Page 5: Roof Mount

    Roof Mount — Frame- - mounted installation — Frame- - mounted applications generally follow the Check building codes weight distribution sequence for a curb installation. Adapt as required to requirements. Unit operating weight is shown in Table 1. suit specific installation plan. Table 1 –...
  • Page 6 C10855 Fig. 3 - - Roof Curb Details...

  • Page 7: Step 5 - Field Fabricate Ductwork

    CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing materials. Membrane roofs can be cut by sharp sheet metal MAXIMUM ALLOWABLE edges. Be careful when placing any sheet metal parts DIFFERENCE IN. (MM) on such roof. 0.5”...

  • Page 8: Step 7 - - Convert To Horizontal & Connect Ductwork

    PLACE ALL GASKET IN PLACE BEFORE PLACING UNIT ON ROOF CURB. 914 - 1371 “B” ( 36” - 54” ) “C” DETAIL “A” DUCT END “A” SEE DETAIL “A” C10281 DIMENSIONS MAX WEIGHT UNIT 50HCQD12 2075 116.0 2945 58.5 1485 59.5 1510 NOTES:...

  • Page 9: Step 8 - Install Outside Air Hood

    Step 8 — Install Outside Air Hood Two Position Damper Hood Removal and Setup - - Factory Option — Economizer Hood Removal and Setup - - 1. The hood is shipped in knock- - down form and Factory Option — assembled to a metal support tray using plastic stretch 1.

  • Page 10: Economizer Hood And Two- - Position Hood

    Economizer Hood and Two- - Position Hood — 5. Attach the post that separates the filters with the screws provided. NOTE: If the power exhaust accessory is to be installed 6. Open the filter clips which are located underneath the on the unit, the hood shipped with the unit will not be hood top.

  • Page 11: Step 10 - Make Electrical Connections

    The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 15. MINIMUM PITCH 1” (25mm) PER BASE RAIL 10’ (3m) OF LINE 2˝ (51) MIN OPEN VENT TO ROOF SEE NOTE DRAIN ROOF CURB...
  • Page 12 (pigtails) on the field line connection points off electrical components. Such operation would the optional disconnect switch. These leads are for factory invalidate any applicable Carrier warranty. run- - test purposes only; remove and discard before...

  • Page 13: Units Without Factory- - Installed Disconnect

    Units Without Factory- - Installed Disconnect — a 125- - volt GFCI (ground- - fault circuit- - interrupter) duplex receptacle rated at 15- - A behind a hinged waterproof access When installing units, provide a disconnect switch of cover, located on the panel beneath the control box. See adequate size per NEC (National Electrical Code).
  • Page 14 to the transformer; however, the conduit must be routed so WARNING that all wiring is either in the conduit or behind the access panel. ELECTRICAL OPERATION HAZARD If the convenience outlet transformer is connected to the Failure to follow this warning could result in personal line side of the factory disconnect option, route the wires injury or death.

  • Page 15: Factory- - Option Thru- - Base Connections

    (field- - supplied) or a PremierLink controller (available as factory- - installed option or as field- - installed accessory, for use on a Carrier Comfort Network or as a stand alone control) or the RTU Open Controller for Building Management Systems using non- - CCN protocols (RTU...

  • Page 16: Unit Without Thru- - Base Conversion Kit

    Unit without Thru- - Base Connection Kit — Electric Heaters 50HCQ units may be equipped with field- - installed Pass the thermostat control wires through the bushing on accessory electric heaters. The heaters are modular in the unit end panel. Route the wire through the snap- - in design, with heater frames holding open coil resistance wire tie and up to the web bushing near the control box.

  • Page 17: Single Point Boxes

    SINGLE HEATER MANUAL RESET POINT BOX COVERS LIMIT SWITCH DISCONNECT MOUNTING LOCATION SINGLE POINT HEATER HEATER HEATER MODULE MODULE MOUNTING MOUNTING (LOCATION 1) (LOCATION 2) BRACKET SCREW C10829 Fig. 29 - - Typical Component Location Single Point Boxes Heater and Supplementary Fuses — When heaters are installed, power wiring to both heaters When the unit MOCP device value exceeds 60- - A, and the rest of the unit is connected via the single point...

  • Page 18: Outdoor Air Enthalpy Control

    NOTE: Optional Outdoor Temperature Control at One Heater Stage – Move either heater wire to this terminal and connect outdoor temperature switch between 2nd and 3rd terminals. C10354 Fig. 31 - - Accessory Electric Heater Control Connections Outdoor Air Enthalpy Control Return Air Enthalpy Sensor —...

  • Page 19: Premierlinkt (Factory Option)

    CURB SENSOR SUPPLY AIR RETURN AIR The PremierLink controller requires the use of a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions C10020 Fig.
  • Page 20 C10850 Fig. 35 - - PremierLink Wiring Schematic...

  • Page 21: Outdoor Air Temperature (Oat) Sensor

    Fig. 38 - - T- - 56 Internal Connections The PremierLink controller is factory- - shipped configured for Space Sensor Mode. A Carrier T- - 55 or T- - 56 space sensor must be used. T- - 55 space temperature sensor...
  • Page 22 SPACE THERMOSTAT THERMOSTAT J4-12 J4-10 J4-8 J4-6 J4-4 THERMOSTAT C10283 Fig. 40 - - Space Thermostat Connections Table 2 – PremierLink Sensor Usage OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR APPLICATION TEMPERATURE TEMPERATURE ENTHALPY SENSOR ENTHALPY SENSOR SENSOR SENSOR Differential Dry Bulb Temperature with Required ---...
  • Page 23 LEGEND: --- Space Temperature Sensor FSD --- Fire Shutdown --- Space Temperature Sensor IAQ --- Indoor Air Quality (CO --- Carrier Comfort Network (communication bus) OAQ --- Outdoor Air Quality (CO CMPSAFE --- Compressor Safety RH --- Relative Humidity FILTER...

  • Page 24: Configure The Unit For Thermostat Mode

    If the 50HCQ unit has an economizer system and by the supply air; the sensor gives inaccurate readings if free- - cooling operation is required, a sensor representing the supply air is blown directly onto the sensor or if the Return Air Temperature must also be connected supply air does not have a chance to mix with the room air (field- - supplied and installed).

  • Page 25: Smoke Detector/Fire Shutdown (Fsd)

    Fig. 43. The outdoor air CO sensor must be located in the PremierLink control can monitor return filter status in two economizer outside air hood. ways: By monitoring a field- - supplied/installed filter pressure switch or via supply fan runtime hours. Using switch input: Install the dirty filter pressure switch according to switch manufacturer’s instructions, to measure pressure drop across the unit’s return filters.

  • Page 26: Space Relative Humidity Sensor

    1000- - ft section. Optically isolated RS- - 485 + (RED) J2-1 repeaters are required every 1000 ft. NOTE: Carrier device default is 9600 band. GND (WHT) J2-2 Communications Bus Wire Specifications - - The CCN Communication Bus wiring is field- - supplied and –...

  • Page 27: Rtu Open Control System

    RTU Open Control System The RTU Open control is factory- - mounted in the 50HCQ unit’s main control box, to the left of the CTB. See The RTU Open controller, see Fig. 50, provides expanded Fig. 51. Factory wiring is completed through harnesses stand- - alone operation of the HVAC system plus connected to the CTB.
  • Page 28 C10851 Fig. 52 - - RTU Open System Control Wiring Diagram...

  • Page 29: Supply Air Temperature (Sat) Sensor

    * These inputs (if installed) take the place of the default input on the specific channel according to schematic. Parallel pins J5--- 1 = J2--- 6, J5--- 3 = J1--- 10, J5--- 5 = J1--- 2 are used for field --- installation. The RTU Open controller requires the use of a Carrier Outdoor Air Temperature (OAT) Sensor —...

  • Page 30: Field Connections

    WIRING Space Temperature (SPT) Sensors — BLU (SPT) J20-1 A field- - supplied Carrier space temperature sensor is required with the RTU Open to monitor space temperature. There are 3 sensors available for this application: S 33ZCT55SPT, space temperature sensor with override...

  • Page 31: Outdoor Air Quality Sensor

    Wiring the Indoor Air Quality Sensor: For each sensor, On 50HCQ units equipped with factory- - installed Smoke use two 2- - conductor 18 AWG (American Wire Gage) Detector(s), the smoke detector controller implements the twisted- - pair cables (unshielded) to connect the separate unit shutdown through its NC contact set connected to the isolated 24 vac power source to the sensor and to connect unit’s CTB input.

  • Page 32: Communication Wiring - - Protocols

    Communication Wiring - - Protocols Local Access — The BACview is a keypad/display BACview Handheld: General — interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, Protocols are the communication languages spoken by see Fig.
  • Page 33 Access Port Protocol Selector RTU Open Cable BACview Local Access Cable C10812 Fig. 60 - - BACview Handheld Connections Table 8 – LEDs The LEDs on the RTU Open control board show the status of certain functions If this LED is on... Status is...

  • Page 34: Smoke Detectors

    NOTE: Refer to Catalog No. 48- - 50HTQ- - 01T for complete configuration of RTU Open operating sequences and troubleshooting information. Refer to RTU Open Controller Integration Guide (Catalog No. 11- - 808- - 428- - 01) for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start- - up.

  • Page 35: Smoke Detector Locations

    Return Air without Economizer — Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into The sampling tube is located across the return air opening the HVAC duct and is directed back into the ventilation on the unit basepan.
  • Page 36 4. Screw the sensor and detector plate into its operating position using screws from Step 1. Make sure the sampling tube connection is on the bottom and the ex- haust tube is on the top. See Fig. 66. 5. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.
  • Page 37 Table 9 – Unit Wire/Fuse or HACR Breaker Sizing Data ELEC. HTR NO C.O. or UNPWR C.O. NO P .E. w/ P .E. (pwrd fr/unit) CRHEATER DISC. SIZE DISC. SIZE FUSE or FUSE or ***A00 (kW) HACR HACR BRKR BRKR NONE 45.2 49.0...
  • Page 38 Table 9 – Unit Wire/Fuse or HACR Breaker Sizing Data (cont) ELEC. HTR w/ PWRD C.O. NO P .E. w/ P .E. (pwrd fr/unit) CRHEATER DISC. SIZE DISC. SIZE FUSE or FUSE or ***A00 (kW) HACR HACR BRKR BRKR NONE 50.0 53.8 288A00...

  • Page 39: Step 11 - Adjust Factory- -Installed Options

    Legend and Notes for Table 9 LEGEND: Example: Supply voltage is 230-3-60 BRKR --- Circuit breaker AB = 224 v --- Convenient outlet BC = 231 v DISC --- Disconnect AC = 226 v --- Full load amps --- Indoor fan motor --- Locked rotor amps (224 + 231 + 226) Average Voltage =...

  • Page 40: Step 12 - Install Accessories

    Refer to separate installation instructions for information on installing these accessories. Catalog No: 50HCQ---04SI Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 01/11 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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