Carrier WeatherMaster 50GCQ 12 Series Installation Instructions Manual
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Carrier WeatherMaster 50GCQ 12 Series Installation Instructions Manual

Carrier WeatherMaster 50GCQ 12 Series Installation Instructions Manual

Single package rooftop heat pump with puron (r-410a) refrigerant and ecoblue™ fan technology
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . 6
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . 7
Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . 7
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . 9
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . 10
• FACTORY-OPTION THRU-BASE CONNECTIONS 
(ELECTRICAL CONNECTIONS)
• COMMERCIAL DEFROST CONTROL
• ELECTRIC HEATERS
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
• CONTROL AND POWER WIRING DIAGRAMS
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500400-01
Installation Instructions
Page
Printed in U.S.A.
Form No. 50GCQ-12-01SI Rev C
WeatherMaster
Single Package Rooftop Heat Pump
with Puron
®
and EcoBlue™ Fan Technology
EconomizerONE (Factory Option) . . . . . . . . . . . . . .26
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Step 12 - Install Accessories . . . . . . . . . . . . . . . . .48
Step 13 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .48
Typical Unit Piping . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .52
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol
. When you see this symbol on the unit and
in instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
Pg 1
®
50GCQ*12
(R-410A) Refrigerant
4-24
Replaces: New

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  • Page 1: Table Of Contents

    ® WeatherMaster 50GCQ*12 Single Package Rooftop Heat Pump with Puron ® (R-410A) Refrigerant and EcoBlue™ Fan Technology Installation Instructions CONTENTS EconomizerONE (Factory Option) ....26 • ECONOMIZER SETTINGS •...

  • Page 2: Model Number Nomenclature And Dimensions

    DANGER CAUTION ELECTRICAL SHOCK HAZARD PERSONAL INJURY HAZARD Failure to follow this warning will result in personal injury or Failure to follow this caution may result in personal injury. death. Sheet metal parts may have sharp edges or burrs. Use care and Before performing service or maintenance operations on unit, wear appropriate protective clothing, safety glasses and gloves turn off main power switch to unit and install lock(s) and...
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Type Packaging & Seismic Compliance 50 – Cooling Unit with optional 0 = Standard electric heat 1 = LTL Model Series Electrical Options GC – High Efficiency Packaged RTU A = None with EcoBlue™...
  • Page 4 Fig. 2 — 50GCQ-12 Unit Dimensional Drawing...
  • Page 5 Fig. 2 — 50GCQ*12 Unit Dimensional Drawing (cont)

  • Page 6: Installation

    DIMENSION LOCATION CONDITION in. (mm) 48 (1219) Unit disconnect is mounted on panel. 18 (457) No disconnect, convenience outlet option. 18 (457) Recommended service clearance. 12 (305) Minimum clearance. 42 (1067) Surface behind servicer is grounded (e.g., metal, masonry wall). 36 (914) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass).

  • Page 7: Curb-Mounted Installation

    curb-mounted units, some accessories must be installed on the unit Install insulation, cant strips, roofing felt, and counter flashing as before the unit is placed on the curb. Review the following for shown. Ductwork must be attached to curb and not to the unit. recommended sequences for installation steps.
  • Page 8 Fig. 5 — 50GCQ*12 Roof Curb Details...

  • Page 9: Step 6 - Rig And Place Unit

    Place All Gasket in Place Before Placing Unit on Roof Curb. (914-1371) “B” 36”-54” “C” Detail “A” Duct End “A” “A” See Detail “A” DIMENSIONS MAX WEIGHT UNIT 50GCQ*12 1870 116.0 2945 63.5 1615 59.0 1500 NOTES: 1. Dimensions in ( ) are in millimeters. 2.

  • Page 10: Step 7 - Convert To Horizontal And Connect

    Step 7 — Convert to Horizontal and Connect Unit is shipped in the vertical duct configuration. Unit without factory-installed economizer or return air smoke detector option may be field-converted to horizontal ducted configuration using accessory CRDUCTCV002A00. To convert to horizontal config- uration, remove screws from side duct opening covers and remove Remove covers.

  • Page 11: Step 9 - Install External Condensate Trap And  Line

    To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a 1/2 in. square socket drive extension) and install it in the side drain connection. Side The piping for the condensate drain and external trap can be Panel completed after the unit is in place.

  • Page 12: Field Power Supply

    FIELD POWER SUPPLY For those units without through-the-curb power, conduit must be used to route the main power from the condenser end, via the power entry in the corner post of the unit (see Fig. 16-18) to either the factory option disconnect or the bottom of the control box. A 1 in.
  • Page 13 Field power wires are connected to the unit at line-side pressure Units Without Disconnect or HACR Option lugs at the main terminal block (TB1) or at factory-installed option non-fused disconnect switch. See Fig. 21. Max wire size is no. 2 Equip AWG (copper only).

  • Page 14: Field Wiring

    Such operation would invalidate any the NFD shipped from the factory is at OFF position (the applicable Carrier warranty. arrow on the black handle knob is at OFF). Insert the shaft with the cross pin on the top of the shaft in...

  • Page 15: Units Without Factory-Installed Non-Fused Disconnect

    Turn the handle to the OFF position with red arrow point- ing at OFF. Install the handle on to the painted cover horizontally with the red arrow pointing to the left. Secure the handle to the painted cover with (2) screws and lock washers supplied.
  • Page 16 Non-Powered Type Requires the field installation of a general-purpose 125-v 15-A Pwd-CO circuit powered from a source elsewhere in the building. Observe Fuse national and local codes when selecting wire size, fuse or breaker Switch requirements and disconnect switch size and location. Route 125-v power supply conductors into the bottom of the utility box containing the duplex receptacle.

  • Page 17: All Units

    Field Control Wiring The 50GCQ*12 requires an external temperature control device. This device can be a thermostat (field-supplied) or a SystemVu™ controller (available as factory-installed option for use on a Carrier Comfort Network ® or as a stand-alone control). All field added 1-1/2 in.
  • Page 18 For 50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire (35°C minimum). For over 75 ft (23 m), use no. 14 AWG insulated wire (35°C minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.
  • Page 19 Fig. 35 — Defrost Control Board Location - 50GCQ 12 Electro-Mechanical Unit Shown Table 4 — 50GCQ Defrost Board I/O and Jumper Configurations POINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTE INPUTS G Fan DI, 24 vac P2-3 CTB-G Y1 Cool 1...
  • Page 20 Shorting the jumpers for a period of 5 to 20 seconds bypasses the size unit. Refer to the label on the unit cabinet for the list of remaining continuous run period and places the unit in a Forced approved heaters. Defrost mode.
  • Page 21 SINGLE POINT BOXES AND SUPPLEMENTARY FUSES When the unit MOCP device value exceeds 60-A, unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory single point boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the out- door section.
  • Page 22 Fig. 42 — Typical Control Wiring Diagram, Electro-Mechanical with POL224 Controller...
  • Page 23 Fig. 43 — Typical Control Wiring Diagram, SystemVu™ Controller...
  • Page 24 Fig. 44 — Typical Power Wiring Diagram – 208/230, 460-3-60 Unit Shown...
  • Page 25 Fig. 45 — Typical Power Wiring Diagram – 575-3-60 Unit Shown...

  • Page 26: Economizerone (Factory Option)

    the harness are made to the C (24 vac common) and R (24 vac EconomizerONE (Factory Option) power) terminals of the economizer controller. See Fig. 48. ECONOMIZER SETTINGS LED Indication Interface Overview NOTE: If different faulty events occur at the same time, then EconomizerONE sensor/DAC LED lights up following the priority below: Red ...
  • Page 27 Table 6 — LED Indication FREE SENSOR Power STATUS COOLING DAC LED Yellow Yellow Yellow Commissioning mode Blinking Blinking Blinking Power start up Yellow On Yellow On Yellow On Free cooling is running Green On — — Free cooling is available Green —...
  • Page 28 Table 7 — Free Cooling Functions CONTROL MODE SENSORS USED ENABLE FREE COOLING? The outside air dry bulb temperature is compared with the set temperature OA (outside air) temperature sensor Control Mode 1 shutoff setpoint. • Fixed Dry bulb If the outside air dry bulb temperature is below the temperature shutoff MA (Mixed Air) temperature sensor setpoint, then the outside air is used to meet all or part of the cooling demand.
  • Page 29 Table 8 — 1 and 2-Stage Cooling Stage I/O Logic Table 11 — Different Fan Speeds with Different Configured Outputs ECONOMIZER COOLING COOLING CONDITION MET STAGE 1 STAGE 2 FAN TYPE 1-SPEED COOLING 2-STAGE COOLING • Spd H (regardless of •...
  • Page 30 Table 13 — Different Damper Position Settings with Different Configured Outputs (DCV is Enabled) FAN TYPE 1-STAGE COOLING 2-STAGE COOLING • 2VENTMIN H to 2VENTMAX H (regardless of • 2VENTMIN H to 2VENTMAX H (regardless of 1-SPEED FAN cooling demand, OCC=Yes) cooling demand, OCC=Yes) 2VENTMIN L to 2VENTMAXL ...
  • Page 31 Exhaust Fan Operation Users can enable this function only from the Climatix mobile ap- ™ plication if the related function is available in the current mobile Up to two exhaust fans can be connected to the economizer application version. controller. Fault Detection and Diagnostics •...

  • Page 32: Wiring

    WIRING WARNING Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle. Mounting Devices Connected to the Economizer Controller Devices like damper actuators, sensors (temperature sensor, humidity sensor, combination temperature and humidity sensor, sensor), thermostats, and exhaust fans can be connected to...
  • Page 33 Table 15 — EconomizerONE Control Wiring Settings LABEL TYPE DESCRIPTION RS485 Modbus A Line A RS485 Modbus B Line B ¬ GND_ISO Earth Ground Type II NTC 10K or 0-10 vdc Mixed or Discharge Air Temperature Sensor Mixed or Discharge Air Temperature Sensor Common Type II NTC 10K or 0-10 vdc Outside Air Temperature Sensor 0-10 vdc or 4-20mA...
  • Page 34 Connecting Peripheral Devices to the Economizer Controller See Fig. 53-57 for wiring details. • Outside Air: Connect to the Mixed or Discharge Air Temperature Sensor OAT and COM terminals of the Outside Air Temperature Sensor device. • Return Air (Differential): Return Air Temperature Sensor Connect to the RAT and S-COM...
  • Page 35 • Outside Combination Temperature/ Humidity: Connect Combo Temperature and Humidity Sensor to the OAT, COM, and OAH terminals of the device. • Combo Temperature and Humidity Sensor Return Combination Temperature/ Humidity: Connect to the RAT, S-COM, and RAH terminals of the device. Fig.

  • Page 36: Setup And Configuration

    SETUP AND CONFIGURATION NOTE: Parameters and display menus may display differently/ dynamically if different applications are configured. See Tables 16-23. IMPORTANT: Before setup and configuration, it is recommend- ed to obtain some location-based values, such as shutoff points, IMPORTANT: Not all operations are available on the local or utilize the location services in the Climatix ™...
  • Page 37 Table 16 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates whether the system can use outdoor air for free cooling. 1ECON ENAB Indicates whether outdoor air is being used for the first stage of cooling. Indicates whether the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, then the parameter value is YES;...
  • Page 38 Table 17 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff setpoint can be obtained automatically if a smartphone or tablet with the mobile application installed on it is connected to the 2 TEMP OFF 48...80°F; increment by 1 63°F network provided by a Wi-Fi/WLAN stick plugged into the economizer controller.
  • Page 39 Table 18 — Parameter Settings — Advanced PARAMETER DESCRIPTION VALUE/RANGE DEFAULT 3FREEZE POS Anti-freeze protection damper position (closed or minimum). 3SD ACT POS Damper position during shutdown (open or closed). MAT sensor location: • Choose MAT if the sensor is installed before the DX (Direct Expansion) coil. 3DIF T LOC •...
  • Page 40 Table 19 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2 connected to the Economizer). Otherwise, choose “NONE”. NONE Auxiliary DO-1. Configurable as: NONE •...

  • Page 41: Installing Optional Hh57Lw001 Single

    Table 22 — Enter Running State PARAMETER DESCRIPTION 8RUN STATE Change to Running State. Press Enter to confirm the change. 8ENTER RUN? Confirm the change to Running State. Perform factory reset. Press Enter to confirm the reset. (This action resets the controller 8FACTORY DEF password to default: OneBT.) 8DEF CONFIRM?
  • Page 42 Fig. 58 — HH57LW001 Dimensional, Connection and Switching Information Fig. 59 — HH79NZ039 Dry Bulb and Mixed Air Sensor Wiring Actuator Wiring Harness HH79NZ039 Outside Air Temperature Sensor Outside Air Damper Fig. 61 — California Title 24 Zones Fig. 60 — EconomizerONE Component Locations (CRECOMZR108A00 Shown)
  • Page 43 U.S. and Canada I-Codes / ASHRAE Zones Climate Zone 1 Climate Zone 5 and Marine Climate Zone 2 Climate Zone 6 Climate Zone 3 Climate Zone 7 and 8 Climate Zone 4 (Except Marine) Fig. 62 — U.S. and Canada Climate Zones Table 24 —...
  • Page 44 Economizers are shipped standard with an HH79NZ039 outside Table 25 — California Title 24 Regional High Limit air dry bulb sensor (see Fig. 59). System default setting (high temp Dry Bulb Temperature Settings limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to REQUIRED HIGH LIMIT 27°C).

  • Page 45: Checkout

    CHECKOUT Status Use the Status menu (refer to Table 16) to check the parameter Inspect all wiring connections at the economizer module’s termi- values for the various devices and sensors configured. nals, and verify compliance with the installation wiring diagrams. For checkout, review the Status of each configured parameter and NOTE: For information about menu navigation and use of the perform the Test Commands tests (refer to Table 21).

  • Page 46: Troubleshooting

    TROUBLESHOOTING For EconomizerONE troubleshooting issues see Table 27. Table 27 — Operating Issues and Concerns SYMPTOM REASON SOLUTION An alarm is displayed on the Sensor, damper, or the whole working Check sensor, damper, or the whole working system following the detailed alarm information. system may not work properly DAC LED is blinking RED Damper slippage...

  • Page 47: Systemvu™ Controller (Factory Option)

    SystemVu™ Controller (Factory Option) For details on operating 50GCQ*12 units equipped with the factory-installed SystemVu controller option, refer to the FC/GC Series Single Package Rooftop Units with SystemVu Controller Controls, Start-up, Operation and Troubleshooting manual. Smoke Detectors Smoke detectors are available as factory-installed options on 50GCQ models.

  • Page 48: Step 11 - Adjust Factory-Installed Options

    UNITS WITH ELECTRO-MECHANICAL CONTROLS Step 11 — Adjust Factory-Installed Options The fan speed set up controls are located on the lower section of SMOKE DETECTORS the Unit Control Board (UCB). See Fig. 65. Smoke detector(s) will be connected at the Unit Control Board Check the job specifications for the CFM (cubic feet per (UCB), at terminals marked “Smoke Shutdown.”...

  • Page 49: Units With Systemvu™ Controls

    ESP in. wg Factory Setting: Calculator 9.0 V 3000 Field Setting: 3250 Record field setting here 3500 3750 4000 Switch Range: 4250 4500 4.1 - 7.5 4750 10.0 6.9 - 8.7 5000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.
  • Page 50 ESP in. wg Calculator 1250 1348 1441 1528 1610 1688 1762 1832 1899 1963 3000 1336 1428 1515 1598 1677 1753 1824 1893 1959 2021 3250 1423 1509 1591 1670 1746 1819 1888 1955 2020 2081 3500 1510 1591 1669 1744 1817 1887...

  • Page 51: Typical Unit Piping

    Typical Unit Piping Table 29 — 50GCQ*12 – Heating Mode 50GCQ*12 heat pump systems include two compressors, a COMPONENT STATUS/POSITION reversing valve, dual-function outdoor and indoor coils, a Reversing Valve De-energized common liquid line with bi-flow TXV, and dedicated cooling and Check Valve A Open heating TXVs.

  • Page 52: Pre-Start And Start-Up

    Filter Drier LPS/LOC Heating TXV Reversing Valve Indoor Coil Outdoor Coil Fig. 69 — Piping Schematic — 50GCQ*12 Heating Mode Pre-Start and Start-Up This completes the mechanical installation of the unit. Refer to the unit’s Service Manual for detailed Pre-Start and Start-Up instructions.
  • Page 54 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500400-01 Printed in U.S.A. Form No. 50GCQ-12-01SI Rev C Pg 54 4-24 Replaces: New...
  • Page 55 START-UP CHECKLIST 50GCQ*12 SINGLE PACKAGE ROOFTOP HEAT PUMP UNITS (Remove and use for 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 judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instruction document.
  • Page 56 (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test. (Y/N) _____ © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500400-01 Printed in U.S.A.

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