Carrier 50FCQ 04-07 Series Service And Maintenance Instructions
Carrier 50FCQ 04-07 Series Service And Maintenance Instructions

Carrier 50FCQ 04-07 Series Service And Maintenance Instructions

Single package rooftop heat pump with puron (r-410a) refrigerant 3 to 6 nominal tons
Table of Contents

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Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
UNIT ARRANGEMENT AND ACCESS . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 3
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan (Direct-Drive) . . . . . . . . . . . . . . . . . . . . . . 4
Staged Air Volume . . . . . . . . . . . . . . . . . . . . . . . . . . 10
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Condenser Coil (Outdoor) . . . . . . . . . . . . . . . . . . . . 10
Evaporator Coil (Indoor) . . . . . . . . . . . . . . . . . . . . . . 10
Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . 10
EVAPORATOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigeration System Components . . . . . . . . . . . . . 12
Evaporator Coil Metering Devices . . . . . . . . . . . . . . 14
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Replacing TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PURON (R-410A) REFRIGERANT . . . . . . . . . . . . . . . 15
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 16
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . 16
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Replacing Compressor . . . . . . . . . . . . . . . . . . . . . . . 18
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 18
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . 18
Troubleshooting Cooling System . . . . . . . . . . . . . . 20
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . 21
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . . 21
Installing Weatherproof Cover . . . . . . . . . . . . . . . . . 21
Non-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Unit-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fuse on Powered Type . . . . . . . . . . . . . . . . . . . . . . . 22
COMMERICAL DEFROST CONTROL . . . . . . . . . . . . 22
Reversing Valve Control . . . . . . . . . . . . . . . . . . . . . 23
Compressor Control . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auxiliary (Electric) Heat control . . . . . . . . . . . . . . . . 23
Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . 24
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500339-01
Page
Printed in U.S.A.
Form 50FCQ-4-7-02SM
Single Package Rooftop Heat Pump
with Puron
®
Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Completing Heater Installation . . . . . . . . . . . . . . . . .25
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . .26
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Smoke Detector Sensor . . . . . . . . . . . . . . . . . . . . . .26
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . .26
Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
SENSOR AND CONTROLLER TESTS . . . . . . . . . . .29
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . .29
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . .29
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Changing the Dirty Sensor Test . . . . . . . . . . . . . . . .29
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . .29
Dirty Sensor Test Using an SD-TRM4 . . . . . . . . . . .30
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . .32
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .32
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Control Circuit, 24-V . . . . . . . . . . . . . . . . . . . . . . . . .32
SYSTEMVU CONTROL SYSTEM . . . . . . . . . . . . . . . .32
SystemVu Interface . . . . . . . . . . . . . . . . . . . . . . . . . .32
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .32
RTU OPEN CONTROL SYSTEM . . . . . . . . . . . . . . . .34
Sensory/Accessory Installation . . . . . . . . . . . . . . . .34
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .35
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . .35
EconoMi$er 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
EconoMi$er X (Factory Option) . . . . . . . . . . . . . . . .44
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . .58
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .59
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Additional Installation/Inspection . . . . . . . . . . . . . .59
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .59
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . .59
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . .59
Pg 1
50FCQ*04-07
(R-410A) Refrigerant
3 to 6 Nominal Tons
7-23
Replaces: 50FCQ-4-7-01SM

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Summary of Contents for Carrier 50FCQ 04-07 Series

  • Page 1: Table Of Contents

    50FCQ*04-07 Single Package Rooftop Heat Pump with Puron ® (R-410A) Refrigerant 3 to 6 Nominal Tons Service and Maintenance Instructions CONTENTS Safety Devices ......25 Completing Heater Installation .
  • Page 2: Safety Considerations

    Compressor Rotation ......59 Refrigerant Service Ports ..... 59 WARNING Cooling .
  • Page 3: Unit Arrangement And Access

    • Ensure wire terminals are tight UNIT ARRANGEMENT AND ACCESS • Check refrigerant charge level General • Ensure indoor coils are clean Figures 1 and 2 show general unit arrangement and access • Check supply blower motor amperage locations. Electric Heating Filter Access Panel •...
  • Page 4: Supply Fan (Blower) Section

    SUPPLY FAN (BLOWER) SECTION 17-1/4" WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Before performing service or maintenance operations on unit, LOCKOUT/TAGOUT the main power switch to unit. Divider Electrical shock and rotating equipment could cause severe injury.
  • Page 5 EVALUATING MOTOR SPEED The DIP switch positions can also be found on the unit's control label diagram. The direct drive ECM blower motor uses a constant speed design. Motor speed is controlled by a 0-10 vdc signal, where 10 vdc is Table 1 —...
  • Page 6 ESP in. wg Factory Setting: Calculator 9.0 V 1500 Field Setting: 1625 Record field setting here 1750 1875 2000 Switch Range: 2125 10.0 2250 4.1 - 7.5 2375 6.9 - 8.7 2500 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range 1 Stage E Heat designed for maximum field adjustment potential.
  • Page 7 Units with SystemVu™ controls Use the DOWN arrow key highlight the UNIT CONFIG- URATIONS menu then press ENTER. On units equipped with the factory-installed SystemVu controller Highlight UNIT CONFIGURATIONS then press ENTER. the Fan Speed settings are accessed through the SystemVu interface.
  • Page 8 TROUBLESHOOTING THE ECM MOTOR EcoBlue™ motors are designed with several built-in protections included in the motor software. If the motor detects a fault it will safely shut down. For temperature related faults the motor requires a line voltage reset to continue operation. For all others, the motor will resume operation automatically as soon as the fault condition is cleared.
  • Page 9 Disassembling Motor and Fan Assembly See Fig. 12. Remove 6 screws from retaining rings in the top of the fan rotor. Remove rotor from motor. Remove 4 screws connecting motor to stator flange. Remove stator from motor. If required, remove stator limit switch on aluminum stator. Remove 3 screws from the heat shield.
  • Page 10: Staged Air Volume

    Set retaining rings (x3) into composite rotor and install COOLING 6 no. 10-32 x 1/2 in. hex head machine screws (P/N: AD07AB126) through the holes in retaining rings. Tighten to 23 in.-lb (2.6 Nm). It is recommended this WARNING screw installation be done in a star pattern. UNIT OPERATION AND SAFETY HAZARD 10.
  • Page 11 the coil. Failure to clean the coils may result in reduced durability Remove the compressor access panel to access the lower in the environment. coil clip. The condenser coil corner post may also be removed. Avoid use of: Remove the screws from both sides of the upper and lower •...
  • Page 12: Evaporator Coil

    debris. If a coil cleaner is used be sure to rinse the coils Thoroughly apply Totaline environmentally balanced coil completely before reassembly. cleaner solution to all coil surfaces including finned area, 11. Move the inner coil back into position. Reinstall the lower tube sheets, and coil headers.
  • Page 13 LPS/LOC Filter Drier Cooling Liquid Line DFT 1 Acutrol Acutrol Indoor Coil Outdoor Coil Strainer Accurater Heating Mode Liquid Line Fig. 19 — 50FCQ*04-06 Piping Schematic — One-Stage Cooling Filter LPS/LOC Drier Cooling Liquid Line DFT 1 Acutrol Indoor Coil Outdoor Coil Strainer Heating Mode Liquid Line...
  • Page 14: Evaporator Coil Metering Devices

    are specifically designed to operate with Puron refrigerant ® Table 3 — Cooling Mode (each circuit) (R-410A). Use only factory-authorized TXVs. COMPONENTS STATUS/POSITION TXV Operation Reversing Valve Energized The TXV is a metering device that is used in air conditioning and Check Valve A Closed heat pump systems to adjust to the changing load conditions by...
  • Page 15: Refrigerant System Pressure Access Ports

    Refrigerant System Pressure Access Ports There are 2 access ports in the system: on the suction tube near the compressor and on the discharge tube near the compressor. These are brass fittings with black plastic caps. The hose connection fit- tings are standard 1/4 in.
  • Page 16: Refrigerant Charge

    Refrigerant Charge COOLING CHARGING CHARTS Amount of refrigerant charge is listed on the unit’s nameplate. Re- fer to Carrier GTAC2-5 Charging, Recovery, Recycling and Rec- Cooling Charging Chart Std 3 Ton Heat Pump R-410A Refrigerant lamation training manual and the following procedures.
  • Page 17: Compressor

    Cooling Charging Chart Std 6 Ton Heat Pump Cooling Charging Chart Std 4 Ton Heat Pump (Three Phase) R-410A Refrigerant R-410A Refrigerant (Unit must run in cooling mode, on high stage (Unit must be operated in cooling mode) 1241 compressors & outdoor fan on high speed) OUTDOOR 59.9 TEMP...
  • Page 18: Replacing Compressor

    The suction pressure should drop and the discharge pres- sure should rise, as is normal on any start-up. WARNING NOTE: If the suction pressure does not drop and the discharge pressure does not rise to normal levels, the evaporator fan is prob- FIRE, EXPLOSION HAZARD ably also rotating in the wrong direction.
  • Page 19 No Screw (Blank Tab) Fig. 29 — Condenser-Fan Assembly — Screw Pattern Sequence...
  • Page 20: Troubleshooting Cooling System

    Troubleshooting Cooling System Refer to Table 6 for additional troubleshooting topics. Table 6 — Troubleshooting SYMPTOM CAUSE SOLUTION Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Determine root cause. Defective thermostat, contactor, transformer, Replacement component.
  • Page 21: Convenience Outlets

    Press the gasket over the screw heads. Slip the backing CONVENIENCE OUTLETS plate over the screw heads at the keyhole slots and align with the gasket; tighten the 2 screws until snug (do not over-tighten). WARNING Mount the weatherproof cover to the backing plate as ELECTRICAL OPERATION HAZARD shown in Fig.
  • Page 22: Duty Cycle

    USING UNIT-MOUNTED CONVENIENCE OUTLETS Units with unit-mounted convenience outlet circuits will often re- quire that 2 disconnects be opened to de-energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de-energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.
  • Page 23: Reversing Valve Control

    Fig. 34 — Defrost Control Board Location — 50FCQ*04-07 Electro-Mechanical Units Table 7 — 50FCQ 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 DI, 24 vac P2-5...
  • Page 24: Defrost

    Defrost The defrost control mode is a time/temperature sequence. There are 2 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 25: Single Point Boxes And Supplementary Fuses

    Single Point Boxes and Supplementary Fuses When the unit MOCP device value exceeds 60A, unit-mounted supplementary fuses are required for each heater circuit. These Stator Manual fuses are included in accessory single point boxes, with power dis- Reset Limit tribution and fuse blocks. The single point box will be installed di- Switch rectly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the out-...
  • Page 26: Smoke Detectors

    SMOKE DETECTORS Duct Smoke Sensor Smoke detectors are available as factory-installed options on 50FCQ models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combination of supply air and return air. Return air smoke detectors are ar- ranged for vertical return configurations only.
  • Page 27: Completing Installation Of Return Air Smoke

    RETURN AIR SMOKE DETECTOR SENSOR WITH ECONOMIZER The sampling tube is inserted through the side plates of the econo- Supply Air Smoke Detector mizer housing, placing it across the return air opening on the unit basepan. See Fig. 46. The holes in the sampling tube face down- ward, into the return air stream.
  • Page 28: Fiop Smoke Detector Wiring And Response

    Rotate the detector plate so the sensor is facing outwards FIOP Smoke Detector Wiring and Response and the sampling tube connection is on the bottom. See ALL UNITS Fig. 48. The FIOP smoke detector is configured to automatically shut down all unit operations when a smoke condition is detected. See Return Air Smoke Detector (Operating Position Shown) Fig.
  • Page 29: Sensor And Controller Tests

    SENSOR AND CONTROLLER TESTS IMPORTANT: Failure to follow this ALERT can result in an Sensor Alarm Test unnecessary evacuation of the facility. Holding the test magnet against the sensor housing for more The sensor alarm test checks a sensor’s ability to signal an alarm than 7 seconds will put the duct detector into the alarm state state.
  • Page 30: Sd-Trm4 Remote Alarm Test Procedure

    SD-TRM4 Remote Alarm Test Procedure Hold the test magnet to the target area for 7 seconds. IMPORTANT: OPERATIONAL TEST ALERT Verify that the test/reset station’s Alarm LED turns on. Failure to follow this ALERT can result in an unnecessary evacuation of the facility. Reset the sensor by holding the test magnet to the target If the smoke detector is connected to a fire alarm system, area for 2 seconds.
  • Page 31: Troubleshooting

    detector does not differentiate which sensor signals an alarm or Table 10 — Detector Indicators trouble condition. Check each sensor for Alarm or Trouble status (indicated by LED). Clear the condition that has generated the trip CONTROL OR DESCRIPTION INDICATOR at this sensor.
  • Page 32: Protective Devices

    HIGH PRESSURE SWITCH The SystemVu control system is fully communicating and cable- ready for connection to the Carrier Comfort Network ® (CCN), The system is provided with a high pressure switch mounted on...
  • Page 33 Fig. 53 — SystemVu Control...
  • Page 34: Rtu Open Control System

    RTU Open enables post of the unit or secured to the unit control box with electrical the unit to run in 100% stand-alone control mode, Carrier’s i-Vu ® conduit. The unit raceway provides the UL required clearance be- Open network, or a Third Party Building Automation System tween high and low-voltage wiring.
  • Page 35: Additional Rtu Open Installation And Troubleshooting

    Additional RTU Open Installation and Trouble- Outside Air shooting Temperature Sensor Additional installation, wiring and troubleshooting information Low Ambient for the RTU Open Controller can be found in the following manu- EconoMi$er IV Sensor al: “RTU Open Multi-Protocol Controller Factory-Installed Op- Controller (W7212) tion —...
  • Page 36: Economi$Er 2

    EconoMi$er 2 IMPORTANT: The optional EconoMi$er 2 does not ® include a controller. The EconoMi$er 2 is operated by a 4 to 20 mA signal from an existing field-supplied controller. See Fig. 58 for wiring information. BLACK Transformer Ground BLUE 500 OHM Resistor VIOLET...
  • Page 37: Economi$Er Iv (Field-Installed Accessory)

    EconoMi$er IV (Field-Installed Accessory) IMPORTANT: For FCQ rooftop units EconoMi$er IV is available as a factory-installed option for 04-06 units only. ECONOMI$ER IV STANDARD SENSORS Troubleshooting instructions are enclosed. A functional view of the EconoMi$er ® IV accessory is shown in Fig. 59. Typical set- tings, sensor ranges, and jumper positions are also shown.
  • Page 38 Table 11 — EconoMi$er IV Input/Output Logic INPUTS OUTPUTS Demand Enthalpy Compressor N Terminal Controlled Ventilation Outdoor Return Stage 1 Stage 2 Occupied Unoccupied (DCV) High (Free Cooling Minimum position Closed LED Off) Below Set (DCV LED Modulating Modulating (between Off) (between minimum position closed and full-open)
  • Page 39 bulb temperature sensor with the accessory enthalpy sensor in the Table 12 — Supply Air Sensor same mounting location. See Fig. 65. When the outdoor air enthal- Temperature/Resistance Values py rises above the outdoor enthalpy changeover set point, the out- door-air damper moves to its minimum position.
  • Page 40 Horizontal Economizer Barometric Relief Flow Vertical Economizer Barometric Relief Flow 2500 2500 Horizontal Economizers Vertical Economizers 2000 2000 1500 1500 3-5 Ton 3-5 Ton 6 Ton 6 Ton 1000 1000 0.05 0.15 0.25 0.05 0.15 0.25 Return Duct Static Pressure (in. wg) Return Duct Static Pressure (in.
  • Page 41 Exhaust Set Point Adjustment The exhaust set point will determine when the exhaust fan runs (29) (32) (35) (38) (41) (43) based on damper position (if accessory power exhaust is in- CONTROL POINT CONTROL stalled). The set point is modified with the Exhaust Fan set point APPROX.
  • Page 42 TR and N. When the timeclock contacts are Use setting 1 or 2 for Carrier equipment. closed, the EconoMi$er IV control will be in occupied mode. When the timeclock contacts are open (removing the 24-v signal Press Clear and Mode buttons.
  • Page 43 Put 620-ohm resistor across terminals SR and +. DCV MINIMUM AND MAXIMUM POSITION Set minimum position, DCV set point, and exhaust poten- To check the DCV minimum and maximum position: tiometers fully CCW (counterclockwise). Make sure EconoMi$er IV preparation procedure has been 10.
  • Page 44: Economi$Er X (Factory Option)

    Economizer Module EconoMi$er X (Factory Option) The module is the core of the EconoMi$er X system. The module The EconoMi$er X system is an expandable economizer control ® is mounted in the unit’s control box, and includes the user inter- system, which includes a W7220 economizer module (controller) face for the system.
  • Page 45 INPUTS Sensors NOTE: A Mixed Air (MA) analog sensor is required on all W7220 units; either an Outdoor Air (OA) sensor for dry bulb change over or an OA bus sensor for outdoor enthalpy change over is required in addition to the MA sensor. An additional Re- turn Air (RA) bus sensor can be added to the system for differen- tial enthalpy or dry bulb changeover.
  • Page 46 Table 14 — Economizer Module — Table 15 — P/N HH57AC081 Sensor Wiring Right Hand Terminal Blocks Terminations LABEL TYPE DESCRIPTION TERMINAL TYPE DESCRIPTION Top Right Terminal Blocks NUMBER LABEL AUX2 I 24 vac IN The first terminal is not used. S-BUS Communications Shut Down (SD) or HEAT (W)
  • Page 47 INTERFACE OVERVIEW Press the (Enter) button to display the value of the This section describes how to use the EconoMi$er X user ® currently displayed item. interface for: Press the ▲ button to increase (change) the displayed • Keypad and menu navigation parameter value.
  • Page 48 Table 17 — W7220 Menu Structure PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECON AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required. FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO...
  • Page 49 Table 17 — W7220 Menu Structure (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed EXH2 OUT ON/OFF percentage set point.
  • Page 50 Table 17 — W7220 Menu Structure (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT EXHAUST FAN STAGE 1 SETPOINT Set point for OA damper position when exhaust fan 1 is powered 0 to 100%; by the economizer.
  • Page 51 Table 17 — W7220 Menu Structure (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT NONE Used for alarm for when the DA air temperature is too high. Sets 70°F to 180°F DA HI ALM 80°F (27°C) upper range of alarm;...
  • Page 52 Table 17 — W7220 Menu Structure (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS FREEZE ALARM menu is below the Low Set point on Advanced menu.
  • Page 53 Table 18 — 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 VMAX-HS VENT MAX VMAX-HS VENT MIN H VMAX-HS VENT MAX H VMAX-LS...
  • Page 54 Table 21 — Enthalpy Operation without DCV (CO Sensor) — One-Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High 24-v/On...
  • Page 55 Table 24 — Dry Bulb Operation with DCV (CO Sensor) — Two-Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0-v/Off 0-v/Off VENTMIN Closed 24-v/On 0-v/Off VENTMIN Closed HIGH 24-v/On 24-v/On VENTMIN Closed 0-v/Off...
  • Page 56 Table 26 — Enthalpy Operation with DCV (CO Sensor) — Two-Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0-v/Off 0-v/Off VENTMIN Closed 24-v/On 0-v/Off VENTMIN Closed HIGH 24-v/On 24-v/On VENTMIN Closed 0-v/Off 0-v/Off...
  • Page 57 Economizing Dual Enthalpy Available High Limit Not Available Single Enthalpy P2 (T,RH) (T,RH) Temperature Fig. 75 — Single Enthalpy Curve Boundaries Table 27 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...
  • Page 58: Pre-Start-Up/Start-Up

    Status Press the (Menu up/Exit) button to complete the action Use the Status menu (see Table 17) to check the parameter values and return to the previous menu. for the various devices and sensors configured. NOTE: If the alarm still exists after clearing it, it is redisplayed NOTE: For information about menu navigation and use of the within 5 seconds.
  • Page 59: Start-Up, General

    Make the following inspections: Internal Wiring a. Inspect for shipping and handling damages such as bro- Check all electrical connections in unit control boxes. Tighten as ken lines, loose parts, or disconnected wires, etc. required. b. Inspect for oil at all refrigerant tubing connections and Refrigerant Service Ports on unit base.
  • Page 60 Heating START-UP, RTU OPEN CONTROLS To start unit, turn on main power supply. Set system selector switch to the HEAT position and set thermostat at a setting above room temperature. Set fan to AUTO position. IMPORTANT: SET-UP INSTRUCTIONS First stage of thermostat energizes the first stage of the electric heaters.
  • Page 61 APPENDIX A — MODEL NUMBER NOMENCLATURE Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit/Series/Model Packaging & Seismic Compliance 50FCQ – Packaged Rooftop Heat Pump 0 = Standard 14.3 SEER Standard Efficiency, sizes 04-06 1 = LTL 13.4 SEER2 Standard Efficiency, sizes 04-06 15.0 IEER Standard Efficiency, size 07 Electrical Options...
  • Page 62 APPENDIX B — PHYSICAL DATA 50FCQ Physical Data 50FCQ UNIT 50FCQA04 50FCQA05 50FCQC05 50FCQA06 50FCQM07 NOMINAL TONS BASE UNIT OPERATING WT (lb) REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1/ Scroll 1 / 1/ Scroll 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / 2-Stage Scroll Puron...
  • Page 63 APPENDIX B — PHYSICAL DATA (cont) 50FCQ Physical Data (cont) 50FCQ UNIT 50FCQA04 50FCQA05 50FCQC05 50FCQA06 50FCQM07 CONDENSER FAN AND MOTOR (Outdoor) Qty / Motor Drive Type 1 / Direct 1 / Direct 1 / Direct 1 / Direct 1 / Direct Motor Hp/Rpm 1/4 / 1100 1/4 / 1100...
  • Page 64 APPENDIX C — FAN PERFORMANCE GENERAL FAN PERFORMANCE NOTES Interpolation is permissible. Do not extrapolate. For more information on the performance limits of Carrier motors, see the application data section of the product data External static pressure is the static pressure difference book for this model and size.
  • Page 65 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Single Phase — 3 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1060 0.08 1325 0.16 1541 0.25 1718 0.35 1871 0.46 1103 0.09 1355 0.17 1572 0.27 1752 0.37 1906 0.48...
  • Page 66 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Single Phase — Medium Static — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1060 1325 1541 1718 1871 1103 1355 1572 1752 1906 1050 1150 1387 1602 1784 1941 1125...
  • Page 67 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Three Phase — 3 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1060 0.08 1325 0.16 1541 0.25 1718 0.35 1871 0.46 1103 0.09 1355 0.17 1572 0.27 1752 0.37 1906 0.48...
  • Page 68 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Three Phase — Medium Static — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1060 1325 1541 1718 1871 1103 1355 1572 1752 1906 1050 1150 1387 1602 1784 1941 1125...
  • Page 69 APPENDIX C — FAN PERFORMANCE (cont) 50FCQC05 Single Phase — 4 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1095 0.14 1302 0.24 1484 0.35 1646 0.48 1794 0.63 1300 1151 0.16 1347 0.26 1523 0.38 1681 0.51...
  • Page 70 APPENDIX C — FAN PERFORMANCE (cont) 50FCQC05 Single Phase — Medium Static — 4 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1094 1302 1484 1646 1794 1300 1150 1347 1523 1681 1826 1400 1209 1395 1565 1719...
  • Page 71 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA05 Three Phase — 4 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1094 0.14 1302 0.24 1484 0.35 1646 0.48 1794 0.63 1300 1150 0.16 1347 0.26 1524 0.38 1681 0.51...
  • Page 72 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA05 Three Phase — Medium Static — 4 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1094 1302 1484 1646 1794 1300 1150 1347 1524 1681 1826 1400 1209 1395 1565 1719...
  • Page 73 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Single Phase — 5 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1228 0.20 1394 0.29 1554 0.40 1701 0.53 1836 0.66 1625 1305 0.24 1457 0.33 1609 0.44 1750 0.57...
  • Page 74 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Single Phase — Medium Static — 5 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1228 1394 1554 1701 1836 1625 1305 1457 1609 1750 1882 1750 1384 1523 1666 1802...
  • Page 75 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Three Phase — 5 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1228 0.20 1394 0.29 1554 0.40 1701 0.53 1836 0.66 1625 1305 0.24 1457 0.33 1609 0.44 1750 0.57...
  • Page 76 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Three Phase — Medium Static — 5 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1228 1394 1554 1701 1836 1625 1305 1457 1609 1750 1882 1750 1384 1523 1666 1802...
  • Page 77 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM07 Three Phase — 6 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1416 0.30 1549 0.39 1690 0.51 1824 0.64 1950 0.78 1950 1516 0.37 1635 0.46 1764 0.58 1891 0.71...
  • Page 78 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM07 Three Phase — Medium Static — 6 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1416 1549 1690 1824 1950 1950 1516 1635 1764 1891 2012 2100 1616 1724 1841 1961...
  • Page 79 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Single Phase — 3 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1036 0.08 1301 0.15 1517 0.24 1698 0.34 1855 0.44 1077 0.09 1331 0.16 1546 0.26 1727 0.36 1885 0.47...
  • Page 80 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Single Phase — Medium Static — 3 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1036 1301 1517 1698 1855 1077 1331 1546 1727 1885 1050 1119 1362 1574 1755 1915 1125...
  • Page 81 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Three Phase — 3 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1036 0.08 1301 0.15 1517 0.24 1698 0.34 1855 0.44 1076 0.09 1330 0.16 1545 0.26 1727 0.36 1885 0.47...
  • Page 82 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA04 Three Phase — Medium Static — 3 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1036 1301 1517 1698 1855 1076 1330 1545 1727 1885 1050 1119 1361 1573 1756 1915 1125...
  • Page 83 APPENDIX C — FAN PERFORMANCE (cont) 50FCQC05 Single Phase — 4 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1066 0.13 1280 0.22 1473 0.34 1644 0.47 1798 0.61 1300 1120 0.15 1320 0.24 1506 0.36 1674 0.49...
  • Page 84 APPENDIX C — FAN PERFORMANCE (cont) 50FCQC05 Single Phase — Medium Static — 4 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1066 1280 1473 1644 1798 1300 1120 1320 1506 1674 1826 1400 1177 1363 1541 1705...
  • Page 85 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA05 Three Phase — 4 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1067 0.13 1280 0.22 1473 0.34 1645 0.47 1798 0.61 1300 1121 0.15 1320 0.24 1506 0.36 1675 0.49...
  • Page 86 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA05 Three Phase — Medium Static — 4 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1067 1280 1473 1645 1798 1300 1121 1320 1506 1675 1827 1400 1177 1363 1542 1706...
  • Page 87 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Single Phase — 5 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1197 0.18 1360 0.26 1525 0.37 1679 0.49 1822 0.62 1625 1271 0.21 1421 0.29 1574 0.40 1721 0.52...
  • Page 88 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Single Phase — Medium Static — 5 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1197 1360 1525 1679 1822 1625 1271 1421 1574 1721 1860 1750 1348 1485 1627 1767...
  • Page 89 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Three Phase — 5 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1196 0.18 1360 0.26 1525 0.37 1679 0.49 1822 0.62 1625 1271 0.21 1421 0.29 1574 0.40 1721 0.52...
  • Page 90 APPENDIX C — FAN PERFORMANCE (cont) 50FCQA06 Three Phase — Medium Static — 5 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1196 1360 1525 1679 1822 1625 1271 1421 1574 1721 1860 1750 1348 1485 1627 1767...
  • Page 91 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM07 Three Phase — 6 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1378 0.27 1512 0.35 1649 0.46 1786 0.58 1918 0.72 1950 1473 0.32 1594 0.41 1721 0.52 1848 0.64...
  • Page 92 APPENDIX C — FAN PERFORMANCE (cont) 50FCQM07 Three Phase — Medium Static — 6 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1378 1512 1649 1786 1918 1950 1473 1594 1721 1848 1973 2100 1569 1680 1796 1915...
  • Page 93 APPENDIX D — WIRING DIAGRAMS Wiring Diagrams 50FCQ*04-07 UNITS SIZE VOLTAGE CONTROL (OVERLAY) PAGE POWER PAGE 208/230-1-60 48TC003163 04-06 Electro-Mechanical 208/230-3-60 48TC003166 48TC003162 W7212 Controller 460/575-3-60 48TC003164 208/230-1-60 48TC003163 04-06 Electro-Mechanical 208/230-3-60 48TC003166 (48TC003217) 48TC003162 W7220 Controller 460/575-3-60 48TC003164 208/230-3-60 48TC003160 48TC003162 Electro-Mechanical...
  • Page 94 APPENDIX D — WIRING DIAGRAMS (cont) Fig. B — 50FCQ*04-06 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7212 Control)
  • Page 95 APPENDIX D — WIRING DIAGRAMS (cont) Fig. C — 50FCQ*04-06 Electro-Mechanical Control Wiring Diagram — All Voltages (with W7220 Control)
  • Page 96 APPENDIX D — WIRING DIAGRAMS (cont) Fig. D — 50FCQ*07 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7220 Control)
  • Page 97 APPENDIX D — WIRING DIAGRAMS (cont) Fig. E — 50FCQ*07 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7220 Control)
  • Page 98 APPENDIX D — WIRING DIAGRAMS (cont) Fig. F — 50FCQ*04-06 Units, All Voltages — with Optional Factory-Installed RTU Open Controller...
  • Page 99 APPENDIX D — WIRING DIAGRAMS (cont) Fig. G — 50FCQ*07 208/230-3-60 Units — with Optional Factory-Installed RTU Open Controller...
  • Page 100 APPENDIX D — WIRING DIAGRAMS (cont) Fig. H — 50FCQ*07 460/575-3-60 Units — with Optional Factory-Installed RTU Open Controller...
  • Page 101 APPENDIX D — WIRING DIAGRAMS (cont) Fig. I — 50FCQ*04-06 Power Wiring Diagram — 208/230-1-60...
  • Page 102 APPENDIX D — WIRING DIAGRAMS (cont) Fig. J — 50FCQ*04-07 Power Wiring Diagram — 208/230-3-60...
  • Page 103 APPENDIX D — WIRING DIAGRAMS (cont) Fig. K — 50FCQ*04-07 Power Wiring Diagram — 460/575-3-60...
  • Page 104 APPENDIX D — WIRING DIAGRAMS (cont) Fig. L — 50FCQ*04-06 Units, All Voltages — Optional Factory-Installed SystemVu™ Controller...
  • Page 105 APPENDIX D — WIRING DIAGRAMS (cont) Fig. M — 50FCQ*07 Units, All Voltages — Optional Factory-Installed SystemVu™ Controller...
  • Page 106 APPENDIX D — WIRING DIAGRAMS (cont) Fig. N — 50FCQ*04-06 SystemVu™ Power Wiring Diagram — 208/230-1-60...
  • Page 107 APPENDIX D — WIRING DIAGRAMS (cont) Fig. O — 50FCQ*04-07 SystemVu™ Power Wiring Diagram — 208/230-3-60...
  • Page 108 APPENDIX D — WIRING DIAGRAMS (cont) Fig. P — 50FCQ*04-07 SystemVu™ Power Wiring Diagram — 460/575-3-60...
  • Page 109 APPENDIX E — LOW AMBIENT CONTROL SENSOR LOCATION Sensor Location Sensor Location Fig. Q — 50FCQ*04 Outdoor Circuiting Fig. R — 50FCQ*05 Outdoor Circuiting...
  • Page 110 Sensor Location Fig. S — 50FCQ*06 Outdoor Circuiting Fig. T — 50FCQ*07 Outdoor Circuiting © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500339-01 Printed in U.S.A.
  • Page 111 START-UP CHECKLIST FOR 50FCQ*04-07 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 Service and Maintenance document.
  • Page 112 (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test. (Y/N) _____ © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500339-01 Printed in U.S.A.

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