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

Carrier WeatherMaster 50GEQ 12 Series Installation Instructions Manual

Single package rooftop heat pump with puron advance r-454b refrigerant and ecoblue fan technology
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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
Trap and Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Leak Dissipation System . . . . . . . . . . . . . . . . . . . . . 27
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500427-01
Installation Instructions
Printed in U.S.A.
Form No. 50GEQ-12-01SI Rev. A
Single Package Rooftop Heat Pump
with Puron Advance™ (R-454B) Refrigerant
and EcoBlue
EconomizerONE (Factory Option) . . . . . . . . . . . . . .30
Page
• SMOKE DETECTORS
Step 12 - Install Accessories . . . . . . . . . . . . . . . . .52
Step 13 - Fan Speed Set Up . . . . . . . . . . . . . . . . . .52
COMPRESSOR ROTATION . . . . . . . . . . . . . . . . . . . .55
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . .55
TYPICAL UNIT PIPING . . . . . . . . . . . . . . . . . . . . . . . .56
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, including ANSI (American National
Standards Institute) Z223.1. 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
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.
WeatherMaster
™
Fan Technology
. When you see this symbol on the unit and in
Pg 1
11-24
®
50GEQ*12
Replaces: New

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  • Page 1: Table Of Contents

    ® WeatherMaster 50GEQ*12 Single Package Rooftop Heat Pump with Puron Advance™ (R-454B) Refrigerant ™ and EcoBlue Fan Technology Installation Instructions • TROUBLESHOOTING CONTENTS EconomizerONE (Factory Option) ....30 Page •...

  • Page 2: Model Number Nomenclature And Dimensions

    DANGER WARNING ELECTRICAL SHOCK HAZARD Use caution when servicing compressor terminal pins. System or compressor abnormalities can dislodge pins allowing oil Failure to follow this warning will result in personal injury or and refrigerant to vent under pressure. death. Before performing service or maintenance operations on unit, turn off main power switch to unit and install lock(s) and AVERTISSEMENT lockout tag(s).
  • Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Type Packaging 50 – Cooling Packaged Rooftop 0 = Standard Model Series Electrical Options GE – Mid Tier Puron Advance™ A = None B = HACR Breaker C = Non-Fused Disconnect (NFDC) Heat Size D = Thru-The-Base Connections (TTB)
  • Page 4 Fig. 2 — 50GEQ-12 Unit Dimensional Drawing...
  • Page 5 Fig. 2 — 50GEQ*12 Unit Dimensional Drawing (cont)

  • Page 6: Installation

    CLEARANCE Service with Service with Operating SURFACE Conductive Barrier Non-conductive Barrier Clearance FRONT 48 in. (1219 mm) 36 in. (914 mm) 18 in. (457 mm) LEFT 48 in. (1219 mm) 42 in. (1067 mm) 18 in. (457 mm) BACK WITHOUT ECONOMIZER 48 in.

  • Page 7: Curb-Mounted Installation

    CURB-MOUNTED INSTALLATION Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit. Install curb SLAB MOUNT (HORIZONTAL UNITS ONLY) Install field-fabricated ductwork inside curb Provide a level concrete slab that extends a minimum of 6 in. Install accessory thru-base service connection package (150 mm) beyond unit cabinet.
  • Page 8 Fig. 5 — 50GEQ*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 50GEQ*12 1870 116.0 2945 57.0 1450 59.0 1500 NOTE(S): 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

    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 com- Panel pleted after the unit is in place.

  • Page 12: Fire Hazard

    the factory option disconnect or the bottom of the control box. A 1 in. conduit is provided wrapped around compressor. A second conduit is provided with factory-installed powered convenience outlet. For those units that require a conduit larger than 1 in., the conduit must be field-supplied.

  • Page 13: Field Wiring

    TEST LEADS - Unit may be equipped with short leads (pigtails) on the field line connection points off the optional disconnect switch. These leads are for factory run-test purposes only; remove Electric and discard before connecting field power wires to unit con- Disconnect nection points.

  • Page 14: Units With Factory-Installed Non-Fused

    Failure to follow this caution may result in equipment damage. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. UNITS WITH FACTORY-INSTALLED NON-FUSED...

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

    Fig. 26 — Handle and Shaft Assembly for HACR Fig. 25 — Handle and Shaft Assembly for NFD Circuit Breaker To field install the HACR circuit breaker shaft and handle: UNITS WITHOUT FACTORY-INSTALLED NON-FUSED Remove the unit front panel (see Fig. 2). DISCONNECT Remove (3) hex screws on the HACR circuit breaker enclo- When installing units, provide a disconnect switch per NEC...
  • 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 50GEQ*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 ®...

  • Page 18: Commercial Defrost Control

    For 50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire (35°C COMMERCIAL DEFROST CONTROL minimum). For over 75 ft (23 m), use no. 14 AWG insulated wire On 50GEQ units equipped with electromechanical controls the (35°C minimum).
  • Page 19 The continuous run period is a fixed time period between the end of the last defrost cycle (or start of the current Heating cycle) during which no defrost will be permitted. This period can be set at 30, 60, 90 or 120 minutes by changing the positions of DIP switches SW1 and SW2 (see Fig.

  • Page 20: Electric Heaters

    Shorting the jumpers for a period of 5 to 20 seconds bypasses the Not all available heater modules may be used in every unit. Use remaining continuous run period and places the unit in a Forced only those heater modules that are UL listed for use in a specific Defrost mode.
  • Page 21 Heater Module Fig. 40 — Heater Module Installation...

  • Page 22: Single Point Boxes And Supplementary Fuses

    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 23 Fig. 43 — Typical 50GEQ 12 Control Wiring Diagram, Electromechanical with POL224 Controller, 230, 460, 575-3-60 Unit Shown...
  • Page 24 Fig. 44 — Typical 50GEQ 12 Control Wiring Diagram, SystemVu™ Controller, 230, 460, 575-3-60 Unit Shown...
  • Page 25 Fig. 45 — Typical 50GEQ Power Wiring Diagram, Electromechanical Controller — 208/230, 460-3-60 Unit Shown...
  • Page 26 Fig. 46 — Typical 50GEQ 12 Power Wiring Diagram, SystemVu Controller — 208/230, 460-3-60 Unit Shown...

  • Page 27: Leak Dissipation System

    SEQUENCE OF OPERATION Leak Dissipation System 50GEQ units use R-454B refrigerant. These units are equipped The control functions as an R454B refrigerant dissipation system. with a factory installed R-454B leak dissipation system to ensure If the refrigerant detection sensor sends a signal indicating a re- safe operation in the event of a refrigerant leak.
  • Page 28 Detail A Detail B Detail A — Test Button Detail B — Status LED Fig. 50 — Dissipation Control Board — shown without dust cover Press the Test button on the dissipation system control board to en- Table 7 — Minimum Dissipation Air Flows sure proper dissipation system operation under each test condition MINIMUM DISSIPATION AIR FLOW (cfm) listed below.

  • Page 29: Troubleshooting

    TROUBLESHOOTING For all flash codes, first try power cycling the system to remove the code. No Power Verify the wiring to/from pins 1 and 8 on the power harness plug. Check the 24V system wiring from the transformer. See Table 9 for details on the operating status and troubleshooting of the Dissipation system for the various flash codes.

  • Page 30: Economizerone (Factory Option)

    LED Indication EconomizerONE (Factory Option) NOTE: If different faulty events occur at the same time, the ECONOMIZER SETTINGS sensor/DAC LED lights up following this priority: Red  Interface Overview Yellow  Off. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED EconomizerONE turns red rather than yellow.
  • Page 31 Table 10 — 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 32 Table 11 — Free Cooling Functions CONTROL MODE SENSORS USED ENABLE FREE COOLING? The outside air dry bulb temperature is compared with the set temperature Control Mode 1 OA (outside air) Temperature Sensor shutoff set point. • Fixed Dry Bulb and MA (Mixed Air) Temperature Sensor If the outside air dry bulb temperature is below the temperature shutoff set point, then the outside air is used to meet all or part of the cooling demand.
  • Page 33 Table 15 — Different Fan Speeds with Different Table 12 — 1 and 2-Stage Cooling Stage I/O Logic Configured Outputs ECONOMIZER COOLING COOLING CONDITION MET STAGE 1 STAGE 2 FAN TYPE 1-SPEED COOLING 2-STAGE COOLING • Spd H (regardless of •...
  • Page 34 Table 17 — Different Damper Position Setting 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 2VENTMAX L ...
  • Page 35 • If Exhaust Fan 2 is connected and configured, then Fault Detection and Diagnostics Exhaust Fan 2 parameter group (L, M, and H) is available, The economizer controller can detect and diagnose free cooling depending on fan configuration. faults, sensor operation faults, and damper modulating faults. It •...

  • Page 36: 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, hu- midity sensor, combination temperature and humidity sensor, CO...
  • Page 37 Table 19 — Economizer 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 38 Connecting Peripheral Devices to the Economizer Controller See Fig. 59-63 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 39 • 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 40: Setup And Configuration

    SETUP AND CONFIGURATION NOTE: Parameters and display menus may display differently/dynamically if different applications are config- ured. See Tables 20-27. IMPORTANT: Before setup and configuration, it is recom- mended to obtain some location-based values, such as shutoff points, or utilize the location services in the Climatix ™...
  • Page 41 Table 20 — Status Display PARAMETER DESCRIPTION VALUE 1FREECOOL Indicates if the system can use outdoor air for free cooling. 1ECON ENAB Indicates if outdoor air is being used for the first stage of cooling. Indicates if the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, the parameter value is YES;...
  • Page 42 Table 21 — Parameter Settings — Basic PARAMETER DESCRIPTION RANGE DEFAULT Temperature shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick 2 TEMP OFF plugged into the Economizer Controller and the mobile application is 48...80°F;...
  • Page 43 Table 22 — 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 44 Table 23 — Parameter Settings — I/O Configurations (cont) PARAMETER DESCRIPTION VALUE DEFAULT Choose ACT FB if feedback signal is available from the connected damper ACT FB 6AUX-AI2 ACT FB actuator. Otherwise, choose NONE. NONE Choose “COOL 2” if Cooling Stage 2 is available (another compressor is COOL 2 6Y2O COOL 2...

  • Page 45: Installing Optional Hh57Lw001 Single Outside Air Enthalpy Sensor

    Table 26 — 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 46 2.75" (70 mm) 3.95" (100 mm) NOTE: Dimensions in inches (mm). Fig. 64 — HH57LW001 Dimensional, Connection and Switching Information 1.327 Max 18.0±0.25 1/4" Stud Hole 0.531±0.008 20 AWG 7/28 PVC Insulated Wire 1/8" ø Black 2-520102-2 (one black/one red) Polyolefin Heat Shrink Insulation Connectors...
  • Page 47 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. 68 — U.S. and Canada Climate Zones Table 28 —...
  • Page 48 Economizers are shipped standard with an HH79NZ039 outside Table 29 — California Title 24 Regional High Limit air dry bulb sensor (refer to Fig. 65). System default setting (high Dry Bulb Temperature Settings temp 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 49: Checkout

    CHECKOUT NOTE: All settings are stored in non-volatile flash memory. Status Inspect all wiring connections at the economizer module’s termi- nals, and verify compliance with the installation wiring diagrams. Use the Status menu (refer to Table 20) to check the parameter For checkout, review the Status of each configured parameter and values for the various devices and sensors configured.

  • Page 50: Troubleshooting

    TROUBLESHOOTING For EconomizerONE troubleshooting issues, see Table 31. Table 31 — 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 51: Systemvu™ Controller (Factory Option)

    SystemVu™ Controller (Factory Option) For details on operating 50GEQ*12 units equipped with the factory-installed SystemVu controller option, refer to the FEQ/GEQ 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 50GEQ models.

  • Page 52: Step 12 - Install Accessories

    Set the Range Switch to either A, B, or C per the Switch Step 12 — Install Accessories Range table. Available accessories include: Using a straight blade screwdriver, turn the vdc control dial to • Roof curb fine tune the vdc reading. •...

  • Page 53: 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 54 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 55: Compressor Rotation

    Reapply electrical power to the compressor. The suction pres- COMPRESSOR ROTATION sure should drop and the discharge pressure should rise which is normal for scroll compressors on start-up. CAUTION Replace compressor if suction/discharge pressures are not within specifications for the specific compressor. EQUIPMENT DAMAGE HAZARD The suction and discharge pressure levels should now move to Failure to follow this caution can result in premature wear and...

  • Page 56: Typical Unit Piping

    TYPICAL UNIT PIPING Table 34 — 50GEQ*12 — Heating Mode 50GEQ*12 heat pump systems include two compressors, a revers- COMPONENT STATUS/POSITION ing valve, dual-function outdoor and indoor coils, a common liq- Reversing Valve De-energized uid line with bi-flow TXV, and dedicated cooling and heating Check Valve A Open TXVs.
  • Page 57 Filter Drier LPS/LOC Heating TXV Reversing Valve Indoor Coil Outdoor Coil Fig. 75 — Piping Schematic — 50GEQ*12 Heating Mode...
  • Page 58 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500427-01 Printed in U.S.A. Form No. 50GEQ-12-01SI Rev. A Pg 58 11-24 Replaces: New...

  • Page 59: Preliminary Information

    START-UP CHECKLIST 50GEQ-*12 Single Package Rooftop Electric Cooling Unit (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 60 (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. 04-53500427-01 Printed in U.S.A.

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