Carrier 50FC 04 Series Service And Maintenance Instructions
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Carrier 50FC 04 Series Service And Maintenance Instructions

Single package rooftop electric cooling unit with puron (r-410a) refrigerant 3 to 6 nominal tons
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . 10
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Evaporator Coil Metering Devices . . . . . . . . . . . . . . 12
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PURON (R-410A) REFRIGERANT . . . . . . . . . . . . . . . 15
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 15
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . 15
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Replacing Compressor . . . . . . . . . . . . . . . . . . . . . . . 18
COMPRESSOR ROTATION . . . . . . . . . . . . . . . . . . . . 19
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . 19
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
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . 22
Completing Heater Installation . . . . . . . . . . . . . . . . 23
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . 24
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Smoke Detector Sensor . . . . . . . . . . . . . . . . . . . . . . 24
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 24
Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500336-01
Single Package Rooftop Electric Cooling Unit
Page
Printed in U.S.A.
Form 50FC-4-7-02SM
with Puron
®
SENSOR AND CONTROLLER TESTS . . . . . . . . . . .27
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . .27
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . .27
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Changing the Dirt Sensor Test . . . . . . . . . . . . . . . . .27
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . .27
Dirty Sensor Test Using an SD-TRK4 . . . . . . . . . . .28
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . .29
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .29
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Control Circuit, 24-V . . . . . . . . . . . . . . . . . . . . . . . . .30
SYSTEMVU CONTROL SYSTEM . . . . . . . . . . . . . . . .30
SystemVu Interface . . . . . . . . . . . . . . . . . . . . . . . . . .30
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .30
RTU OPEN CONTROL SYSTEM . . . . . . . . . . . . . . . .31
Sensory/Accessory Installation . . . . . . . . . . . . . . . .31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .32
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . .32
EconoMi$er 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Economi$er X (Factory Option) . . . . . . . . . . . . . . . .41
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . .54
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .54
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Additional Installation/Inspection . . . . . . . . . . . . . .54
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .54
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . .54
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . .54
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . .55
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Ventilation (Continuous Fan) . . . . . . . . . . . . . . . . . .55
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . .55
START-UP, RTU OPEN CONTROLS . . . . . . . . . . . . .55
START-UP, SYSTEMVU CONTROLS . . . . . . . . . . . .55
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . .56
APPENDIX B - PHYSICAL DATA . . . . . . . . . . . . . . .57
APPENDIX C - FAN PERFORMANCE . . . . . . . . . . .64
Pg 1
50FC-*04-07
(R-410A) Refrigerant
3 to 6 Nominal Tons
7-23

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  • Page 1: Table Of Contents

    50FC-*04-07 Single Package Rooftop Electric Cooling Unit with Puron ® (R-410A) Refrigerant 3 to 6 Nominal Tons Service and Maintenance Instructions CONTENTS SENSOR AND CONTROLLER TESTS ...27 Sensor Alarm Test ......27 Page Controller Alarm Test .

  • Page 2: Safety Considerations

    APPENDIX D — WIRING DIAGRAMS ... . 93 APPENDIX E — LOW AMBIENT CONTROL  WARNING SENSOR LOCATION ..... . 115 START-UP CHECKLIST .

  • Page 3: Unit Arrangement And Access

    • Ensure indoor coils are clean UNIT ARRANGEMENT AND ACCESS • Check supply blower motor amperage General Electric Heating Figures 1 and 2 show general unit arrangement and access • Inspect power wire connections locations. • Ensure fuses are operational Filter Access Panel •...

  • Page 4: Supply Fan (Blower) Section

    All low-voltage wiring should be routed through the provided raceway built into the corner post of the unit or secured to the unit 17 1/4" control box with the electrical conduit in order to provide UL- required clearance between high and low-voltage wiring. Supply Fan (Direct-Drive) All FC units have the EcoBlue direct drive vane axial fan sys-...
  • Page 5 lower fan rpms. This offset is factory set and controlled by the UCB. If fan speed verification is being done with a strobe, fan speed should be verified in all unit operation modes. Units with Electro-mechanical controls The Fan Speed set up controls are located on the lower section of the Unit Control Board (UCB).
  • 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 six screws from retaining rings in the top of the fan rotor. Remove rotor from motor. Remove four screws connecting motor to stator flange. Remove stator from motor. If required, remove stator limit switch on aluminum stator. Remove three 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 ROUTINE CLEANING OF COIL SURFACES Top Panel Periodic cleaning with Totaline environmentally balanced coil ® cleaner is essential to extend the life of coils. This cleaner is avail- Support able from Replacement Components Division as part number (Field- Supplied) P902-0301 for a one gallon container, and part number P902-0305 for a 5 gallon container.

  • Page 12: Evaporator Coil

    Thoroughly apply Totaline environmentally balanced coil Top View cleaner solution to all coil surfaces including finned area, tube sheets and coil headers. Hold garden sprayer nozzle close to finned areas and apply cleaner with a vertical, up-and-down motion. Avoid spray- ing in horizontal pattern to minimize potential for fin damage.

  • Page 13: Thermostatic Expansion Valve (Txv)

    Attach the equalizer tube to the suction line. If the coil has THERMOSTATIC EXPANSION VALVE (TXV) a mechanical connection, then use a wrench and an addi- All 50FC 04-06 units equipped with the Humidi-MiZer option and tional wrench on connections to prevent damage. If the all 50FC 07 units include TXV control.

  • Page 14: Refrigerant System Pressure Access Ports

    permanently assembled into this core body and cannot be serviced Refrigerant System Pressure Access Ports separately; replace the entire core body if necessary. Service tools There are two access ports in the system: on the suction tube near are available from RCD that allow the replacement of the check the compressor and on the discharge tube near the compressor.

  • Page 15: Puron (R-410A) Refrigerant

    Puron (R-410A) refrigerant from the cylinder as a vapor. Refrigerant Charge Amount of refrigerant charge is listed on the unit’s nameplate. Re- fer to Carrier GTAC2-5 Charging, Recovery, Recycling and Rec- lamation training manual and the following procedures. Remove Charge if Below the Curve Unit panels must be in place when unit is operating during the charging procedure.
  • Page 16 Cooling Charging Chart Std Tier 4 Ton 3 Ton Std Tier Hot gas Reheat R-410A CHARGING CHART (3-Phase) R-410A Refrigerant (Unit must run on Sub-cooling mode) 1241 OUTDOOR TEMP 59.9 1172 °F / °C 115 / 46 105 / 41 95 / 35 1103 48.8...
  • Page 17 Cooling Charging Chart Std Tier 5 Ton 5 Ton Std Tier Hot gas Reheat R-410A CHARGING CHART (Single Phase) R-410A Refrigerant (Unit must run on Sub-cooling mode) 1241 OUTDOOR TEMP 59.9 1172 °F / °C 115 / 46 Add Charge if Above the Curve 105 / 41 Add Charge if Above the Curve 95 / 35...

  • Page 18: Compressor

    6 Ton Std Tier Hot gas Reheat R-410A CHARGING CHART WARNING (Unit must run on Sub-cooling mode) FIRE, EXPLOSION HAZARD 59.9 Failure to follow this warning could result in death, serious personal injury and/or property damage. Add Charge if Above the Curve Never use air or gases containing oxygen for leak testing or for 48.8 operating refrigerant compressors.

  • Page 19: Compressor Rotation

    Replace compressor if suction/discharge pressures are not COMPRESSOR ROTATION within specifications for the specific compressor. The suction and discharge pressure levels should now move to CAUTION their normal start-up levels. Filter Drier INSTALLATION SITE DAMAGE Replace whenever refrigerant system is exposed to atmosphere. Failure to follow this caution can result in damage to Only use factory specified liquid-line filter driers with working equipment location site.

  • Page 20: Troubleshooting Cooling System

    Troubleshooting Cooling System Refer to Table 3 for additional troubleshooting topics. Table 3 — 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 two 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

    ELECTRIC HEATERS The 50FC units can be equipped with field-installed accessory electric heaters. The heaters are modular in design, with heater frames holding open coil resistance wires strung through ceramic insulators and control contactor(s), using a combination of 24-v control side break/auto-reset or line-break/auto-reset limit switch- es and a pilot-circuit/manual reset limit switch to protect the unit against over-temperature situations.

  • Page 23: Completing Heater Installation

    Stator Manual Reset Limit Switch Heater Module Fig. 39 — Typical Module Installation SINGLE POINT BOXES AND SUPPLEMENTARY FUSES Control Side Line Break Automatic Reset “One Shot” When the unit MOCP device value exceeds 60A, unit-mounted Limit Switches Limit Switches supplementary fuses are required for each heater circuit.

  • Page 24: Smoke Detectors

    SMOKE DETECTORS Duct Smoke Sensor Smoke detectors are available as factory-installed options on 50FC 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- Exhaust Tube ranged for vertical return configurations only.

  • Page 25: Completing Installation Of Return Air Smoke

    downward, into the return air stream. The sampling tube is con- nected using tubing to the return air sensor mounted on a bracket high on the partition between return filter and controller location. Supply Air The sensor is shipped in a flat-mounting location. Installation re- Smoke Detector quires the sensor be relocated to its operating location and the tub- ing to the sampling tube be connected.

  • Page 26: Fiop Smoke Detector Wiring And Response

    FIOP Smoke Detector Wiring and Response Return Air Smoke Detector ALL UNITS (Operating Position Shown) The FIOP smoke detector is configured to automatically shut down all unit operations when a smoke condition is detected. See Fig. 50, Smoke Detector Wiring. HIGHLIGHT A Smoke detector NC contact set will open on smoke alarm condi- tion, de-energizing the ORN conductor.

  • Page 27: Sensor And Controller Tests

    SENSOR AND CONTROLLER TESTS IIMPORTANT: Failure to follow this ALERT can result in an unnecessary evacuation of the facility. Sensor Alarm Test Holding the test magnet against the sensor housing for more than The sensor alarm test checks a sensor’s ability to signal an alarm seven seconds will put the duct detector into the alarm state and state.

  • Page 28: Remote Test/Reset Station Dirty Sensor Test

    Remote Test/Reset Station Dirty Sensor Test The test/reset station dirty sensor test checks the test/reset station’s HVAC Duct Sampling ability to initiate a sensor dirty test and indicate the results. It must Tube be wired to the controller as shown in Fig. 51 and configured to Sensor operate the controller’s supervision relay.

  • Page 29: Troubleshooting

    • If a sensor trouble, the sensor’s Trouble LED the control- SENSOR’S TROUBLE LED IS ON ler’s Trouble LED turn on. Check the sensor’s Dirty LED. If it is flashing, the sensor • If 100% dirty, the sensor’s Dirty LED turns on and the is dirty and must be cleaned.

  • Page 30: Relief Device

    Units with SystemVu ™ Controls Version X.X Controls, Start-up, and troubleshoot. Operation and Troubleshooting.” The SystemVu control system is fully communicating and cable- ready for connection to the Carrier Comfort Network ® (CCN), Carrier i-Vu ® , and Third Party BACnet building management 1.

  • Page 31: Rtu Open Control System

    RTU Open enables the conduit. The unit raceway provides the UL required clearance be- unit to run in 100% stand-alone control mode, Carrier’s i-Vu ® tween high and low-voltage wiring. Pass the control wires through...

  • Page 32: 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: “48/50FC, 48/50GC Single Package Rooftop Units with RTU Controller (W7212) Open Controls, Start-up, Operation and Troubleshooting Instructions.”...

  • Page 33: 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. 59 for wiring information. BLACK Tranformer Ground BLUE 500 OHM Resistor VIOLET...

  • Page 34: Economi$Er Iv (Field-Installed Accessory)

    EconoMi$er IV (Field-Installed Accessory) IMPORTANT: For FC rooftop units EconoMi$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. 60. Typical set- ®...
  • Page 35 Table 6 — EconoMi$er IV Input/Output Logic INPUTS OUTPUTS Demand Enthalpy Compressor N Terminal Controlled Ventilation Outdoor Return Stage 1 Stage 2 Occupied Unoccupied (DCV) High (Free Cooling Minimum position Closed LED Off) Below set (DCV LED Modulating (between minimum Modulating (between Off)
  • Page 36 Table 7 — Supply Air Sensor DIP Switch Changeover Temperature/Resistance Values Position Temperature TEMPERATURE (°F) RESISTANCE (ohms) 48°F –58 220,250 1 2 3 –40 100,000 –22 53,010 53°F –4 29,091 1 2 3 16,500 9,795 55°F 5,970 1 2 3 3,747 58°F 3,000...
  • Page 37 Horizontal Economizer Barometric Relief Flow Vertical Economizer Barometric Relief Flow 2500 2500 Horizontal Economizers Vertical Economizers 2000 2000 1500 1500 3-5 Ton 3-5 Ton 6 Ton 6 Ton 1000 1000 0.05 0.15 0.25 0.05 0.15 0.25 Return Duct Static Pressure (in. wg) Return Duct Static Pressure (in.
  • Page 38 Exhaust Set Point Adjustment The exhaust set point will determine when the exhaust fan runs (29) (32) (35) (38) (41) (43) based on damper position (if accessory power exhaust is in- CONTROL POINT CONTROL stalled). The set point is modified with the Exhaust Fan set point APPROX.
  • Page 39 EconoMi$er IV control will be in occupied mode. Use setting 1 or 2 for Carrier equipment. When the timeclock contacts are open (removing the 24-v signal Press Clear and Mode buttons. Hold at least 5 seconds from terminal N), the EconoMi$er IV will be in unoccupied until the sensor enters the Edit mode.
  • Page 40 If connected, remove sensor from terminals SO and +. DCV MINIMUM AND MAXIMUM POSITION Connect 1.2 kilo-ohm 4074EJM checkout resistor across To check the DCV minimum and maximum position: terminals SO and +. Make sure EconoMi$er IV preparation procedure has been Put 620-ohm resistor across terminals SR and +.

  • Page 41: 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$er X system is an expandable economizer control ® is mounted in the unit’s control box, and includes the user inter- system, which includes a W7220 economizer module (controller) face for the system.
  • Page 42 INPUTS Sensors NOTE: A Mixed Air (MA) analog sensor is required on all W7220 units; either an Outdoor Air (OA) sensor for dry bulb change over or an OA bus sensor for outdoor enthalpy change over is required in addition to the MA sensor. An additional Re- turn Air (RA) bus sensor can be added to the system for differen- tial enthalpy or dry bulb changeover.
  • Page 43 Table 9 — Economizer Module — Table 10 — HH57AC081 Sensor Wiring Terminations Right Hand Terminal Blocks TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS AUX2 I 24 vac IN The first terminal is not used. Communications S-BUS S-BUS...
  • Page 44 INTERFACE OVERVIEW NOTE: When values are displayed, pressing and holding the ▲or ▼ button causes the display to automatically increment or This section describes how to use the EconoMi$er X user ® decrement. interface for: • Keypad and menu navigation Press the (Enter) button to accept the displayed value and store it in nonvolatile RAM.
  • Page 45 Table 12 — W7220 Menu Structure a,b,c,d,e PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO 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 46 Table 12 — W7220 Menu Structure a,b,c,d,e (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MECH COOL ON Displays stage of mechanical cooling that is active. 0, 1, or 2 HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS SUPPLY FAN SPEED (CONT)
  • Page 47 Table 12 — W7220 Menu Structure a,b,c,d,e (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR 0 to 50°F ERV OAT SP 32°F TEMPERATURE SETPOINT increment by 1 Only displayed when AUX1 O = ERV Exhaust fan set point for single speed units.
  • Page 48 Table 12 — W7220 Menu Structure a,b,c,d,e (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT COOLING STAGE 3 DELAY 0 min, 5 min, Delay after stage 2 cool has been active. Turns on second stage of 15 min, then cooling when economizer is first stage and mechanical cooling is STG3 DLY 2.0h...
  • Page 49 Table 12 — W7220 Menu Structure a,b,c,d,e (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT DISCHARGE AIR S-BUS SENSOR ERROR DA SYLK T ERR Discharge air sensor has failed or become disconnected — check wiring then replace sensor if the alarm continues. OUTSIDE AIR TEMPERATURE SENSOR ERROR OA SENS T ERR Outdoor air temperature sensor has failed or become disconnected...
  • Page 50 Enthalpy Settings When the OA temperature, OA humidity and OA dew point are all below the selected boundary, the economizer sets the econo- When the OA temperature, enthalpy and dew point are below the mizing mode to YES, economizing is available. respective setpoints, the Outdoor Air can be used for economiz- ing.
  • Page 51 Standard or Single Speed Fan Operation The W7220 controller will control a standard 1 speed unit when configured for FAN TYPE = 1 SPEED. Refer to Table 14 for economizer operation. Table 14 — Economizer Operation — FAN TYPE = 1SPEED INPUTS OUTPUTS Demand...
  • Page 52 2 Speed Fan Operation The W (heating mode) is not controlled by the W7220 but it re- quires the status to know where to position the OA damper for NOTE: 2 Speed Fan operation applies to 50FC-*07 models only. minimum position for the fan speed. The W7220 controller has the capability to work with a system us- The 2 speed fan delay is available when the system is programmed ing a 2 speed supply fan.
  • Page 53 2SP H/C and 3 Speed Fan Operation To perform a Checkout test: FAN TYPE = 2SP H/C and FAN TYPE = 3SPEED are not used Scroll to the desired test in the Checkout menu using the on 50FC units. ▲ and ▼ buttons. Press the (Enter) button to select the item.

  • Page 54: Pre-Start-Up/Start-Up

    c. Inspect all field-wiring and factory-wiring connections. PRE-START-UP/START-UP Be sure that connections are completed and tight. Be sure that wires are not in contact with refrigerant tubing or sharp edges. WARNING d. Inspect coil fins. If damaged during shipping and han- PERSONAL INJURY HAZARD dling, carefully straighten fins with a fin comb.

  • Page 55: Compressor Rotation

    Compressor Rotation Heating To start unit, turn on main power supply. Set system selector switch to the HEAT position and set thermostat at a setting above CAUTION room temperature. Set fan to AUTO position. First stage of thermostat energizes the first stage of the electric EQUIPMENT DAMAGE HAZARD heaters.

  • Page 56: Appendix A - Model Number Nomenclature

    APPENDIX A — MODEL NUMBER NOMENCLATURE Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Packaging & Seismic Compliance 50 = Electric Heat Packaged Rooftop 0 = Standard 1 = LTL ® Model Series — WeatherMaker Electrical Options FC = 14.0 SEER Standard Efficiency, sizes 04-06 13.4 SEER2 Standard Efficiency, sizes 04-06...

  • Page 57: Appendix B - Physical Data

    APPENDIX B — PHYSICAL DATA 50FC 3 Ton Physical Data 50FC UNIT 50FC-A04 50FC-B04 50FC-C04 NOMINAL TONS BASE UNIT OPERATING WT (lb) REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1/ Scroll 1 / 1/ Scroll 1 / 1/ Scroll Puron ®...
  • Page 58 APPENDIX B — PHYSICAL DATA (cont) 50FC 3 Ton Physical Data (cont) 50FC UNIT 50FC-A04 50FC-B04 50FC-C04 High Static 3 Phase Motor Qty/Drive Type 1/Direct 1/Direct — Maximum Cont Bhp 1.07 1.07 — Rpm Range 249-2490 249-2490 — Fan Qty/Type 1/Vane Axial 1/Vane Axial —...
  • Page 59 APPENDIX B — PHYSICAL DATA (cont) 50FC 4 Ton Physical Data 50FC UNIT 50FC-A05 50FC-B05 50FC-C05 NOMINAL TONS BASE UNIT OPERATING WT (lb) REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1/ Scroll 1 / 1/ Scroll 1 / 1/ Scroll Puron ®...
  • Page 60 APPENDIX B — PHYSICAL DATA (cont) 50FC 4 Ton Physical Data (cont) 50FC UNIT 50FC-A05 50FC-B05 50FC-C05 High Static 3 Phase Motor Qty/Drive Type 1/Direct 1/Direct — Maximum Cont Bhp 1.96 1.96 — Rpm Range 266-2660 266-2660 — Fan Qty/Type 1/Vane Axial 1/Vane Axial —...
  • Page 61 APPENDIX B — PHYSICAL DATA (cont) 50FC 5 Ton Physical Data 50FC UNIT 50FC-A06 50FC-B06 50FC-C06 NOMINAL TONS BASE UNIT OPERATING WT (lb) REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll Puron ®...
  • Page 62 APPENDIX B — PHYSICAL DATA (cont) 50FC 5 Ton Physical Data (cont) 50FC UNIT 50FC-A06 50FC-B06 50FC-C06 High Static 3 Phase Motor Qty/Drive Type 1/Direct 1/Direct — Maximum Cont Bhp 2.43 2.43 — Rpm Range 284-2836 284-2836 — Fan Qty/Type 1/Vane Axial 1/Vane Axial —...
  • Page 63 APPENDIX B — PHYSICAL DATA (cont) 50FC 6 Ton Physical Data 50FC UNIT 50FC-M07 50FC-N07 NOMINAL TONS BASE UNIT OPERATING WT (lb) REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1 / 2-Stage Scroll 1 / 1 / 2-Stage Scroll Puron ®...

  • Page 64: Appendix C - Fan Performance

    FIOPs or accessories. For more information on the performance limits of Carrier Tabular data accounts for pressure loss due to clean filters, motors, see the application data section of the product data unit casing, wet coils, and highest gas heat exchanger book for this model and size.
  • Page 65 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C04 Single Phase — 3 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1040 0.08 1307 0.16 1526 0.25 1705 0.35 1859 0.45 1082 0.09 1336 0.17 1554 0.26 1736 0.36 1892 0.47...
  • Page 66 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C04 Single Phase — Medium Static — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1040 1307 1526 1705 1859 1082 1336 1554 1736 1892 1050 1127 1366 1582 1766 1925 1125...
  • Page 67 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A04 Three Phase — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1040 0.08 1307 0.16 1526 0.25 1705 0.35 1859 0.45 1082 0.09 1336 0.17 1554 0.26 1736 0.36 1892 0.47...
  • Page 68 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A04 Three Phase — Medium Static — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1040 1307 1526 1705 1859 1082 1336 1554 1736 1892 1050 1127 1366 1582 1766 1925 1125...
  • Page 69 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C05 Single Phase — 4 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1120 0.15 1327 0.25 1506 0.37 1667 0.50 1814 0.65 1300 1178 0.18 1375 0.28 1549 0.40 1705 0.54...
  • Page 70 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C05 Single Phase — Medium Static — 4 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1120 1327 1506 1667 1814 1300 1178 1375 1549 1705 1849 1400 1238 1424 1593 1745...
  • Page 71 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A05 Three Phase — 4 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1115 0.15 1332 0.26 1513 0.37 1665 0.50 1801 0.63 1300 1174 0.17 1376 0.28 1557 0.41 1709 0.54...
  • Page 72 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A05 Three Phase — Medium Static — 4 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1115 1332 1513 1665 1801 1300 1174 1376 1557 1709 1843 1400 1236 1422 1601 1754...
  • Page 73 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C06 Single Phase — 5 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1301 0.24 1477 0.35 1639 0.47 1788 0.62 1925 0.77 1625 1381 0.28 1544 0.40 1700 0.53 1843 0.67...
  • Page 74 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C06 Single Phase — Medium Static — 3 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1301 1476 1639 1788 1925 1625 1381 1545 1700 1843 1976 1750 1463 1615 1763 1901...
  • Page 75 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A06 Three Phase — 5 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1301 0.24 1477 0.35 1639 0.47 1788 0.62 1925 0.77 1625 1381 0.28 1545 0.40 1700 0.53 1843 0.67...
  • Page 76 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A06 Three Phase — Medium Static — 5 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1301 1477 1639 1788 1925 1625 1381 1545 1700 1843 1977 1750 1463 1615 1763 1902...
  • Page 77 APPENDIX C — FAN PERFORMANCE (cont) 50FC-M07 Three Phase — 6 Ton Vertical Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1423 0.30 1550 0.39 1682 0.50 1820 0.64 1955 0.79 1950 1521 0.37 1638 0.46 1758 0.57 1883 0.70...
  • Page 78 APPENDIX C — FAN PERFORMANCE (cont) 50FC-M07 Three Phase — Medium Static — 6 Ton Vertical Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1423 1550 1682 1820 1955 1950 1521 1638 1758 1883 2011 2100 1620 1730 1839 1953...
  • Page 79 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C04 Single Phase — 3 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1017 0.07 1284 0.15 1501 0.24 1684 0.33 1843 0.44 1055 0.08 1311 0.16 1527 0.25 1711 0.35 1871 0.46...
  • Page 80 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C04 Single Phase — Medium Static — 3 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1017 1284 1501 1684 1843 1055 1311 1527 1711 1871 1050 1096 1340 1553 1737 1899 1125...
  • Page 81 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A04 Three Phase — 3 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1017 0.07 1284 0.15 1501 0.24 1684 0.33 1843 0.44 1055 0.08 1311 0.16 1527 0.25 1711 0.35 1871 0.46...
  • Page 82 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A04 Three Phase — Medium Static — 3 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1017 1284 1501 1684 1843 1055 1311 1527 1711 1871 1050 1096 1340 1553 1737 1899 1125...
  • Page 83 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C05 Single Phase — 4 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1092 0.14 1306 0.24 1497 0.35 1667 0.49 1819 0.64 1300 1148 0.16 1348 0.26 1533 0.38 1700 0.52...
  • Page 84 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C05 Single Phase — Medium Static — 4 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1092 1306 1497 1667 1819 1300 1148 1348 1533 1700 1851 1400 1207 1394 1571 1734...
  • Page 85 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A05 Three Phase — 4 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1093 0.14 1306 0.24 1497 0.35 1667 0.49 1819 0.64 1300 1148 0.16 1348 0.26 1533 0.38 1700 0.52...
  • Page 86 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A05 Three Phase — Medium Static — 4 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 1093 1306 1497 1667 1819 1300 1148 1348 1533 1700 1850 1400 1206 1393 1571 1734...
  • Page 87 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C06 Single Phase — 5 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1267 0.21 1442 0.31 1612 0.44 1770 0.58 1916 0.73 1625 1345 0.25 1506 0.35 1666 0.48 1818 0.62...
  • Page 88 APPENDIX C — FAN PERFORMANCE (cont) 50FC-C06 Single Phase — Medium Static — 5 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1267 1442 1612 1770 1916 1625 1345 1506 1666 1818 1960 1750 1425 1574 1723 1869...
  • Page 89 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A06 Three Phase — 5 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1267 0.21 1442 0.31 1612 0.44 1770 0.58 1916 0.73 1625 1345 0.25 1506 0.35 1666 0.48 1818 0.62...
  • Page 90 APPENDIX C — FAN PERFORMANCE (cont) 50FC-A06 Three Phase — Medium Static — 5 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1267 1442 1612 1770 1916 1625 1345 1506 1666 1818 1960 1750 1425 1574 1723 1869...
  • Page 91 APPENDIX C — FAN PERFORMANCE (cont) 50FC-M07 Three Phase — 6 Ton Horizontal Supply (rpm - bhp) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1379 0.27 1512 0.35 1650 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) 50FC-M07 Three Phase — Medium Static — 6 Ton Horizontal Supply (rpm - vdc) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 1379 1512 1650 1786 1918 1950 1473 1594 1721 1848 1973 2100 1569 1680 1796 1915...
  • Page 93 APPENDIX D — WIRING DIAGRAMS Wiring Diagrams 50FC-*04-07 UNITS SIZE VOLTAGE CONTROL (OVERLAY) PAGE POWER PAGE 208/230-1-60 48TC003003 48TC002993 04-06 Electro-Mechanical 208/230-3-60 48TC002998 48TC002994 W7212 Controller 460/575-3-60 48TC002999 48TC002995 208/230-1-60 48TC003003 (48TC002989) 48TC002993 04-06 Electro-Mechanical 208/230-3-60 48TC002998 (48TC002989) 48TC002994 W7220 Controller 460/575-3-60 48TC002999 (48TC002989) 48TC002995...
  • Page 94 APPENDIX D — WIRING DIAGRAMS (cont) Fig. B — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 208/230-1-60 (with W7212 Control)
  • Page 95 APPENDIX D — WIRING DIAGRAMS (cont) Fig. C — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7212 Control)
  • Page 96 APPENDIX D — WIRING DIAGRAMS (cont) Fig. D — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7212 Control)
  • Page 97 APPENDIX D — WIRING DIAGRAMS (cont) Fig. E — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 208/230-1-60 (with W7220 Control)
  • Page 98 APPENDIX D — WIRING DIAGRAMS (cont) Fig. F — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7220 Control)
  • Page 99 APPENDIX D — WIRING DIAGRAMS (cont) Fig. G — 50FC-*04-06 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7220 Control)
  • Page 100 APPENDIX D — WIRING DIAGRAMS (cont) Fig. H — 50FC-*07 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7220 Control)
  • Page 101 APPENDIX D — WIRING DIAGRAMS (cont) Fig. I — 50FC-*07 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7220 Control)
  • Page 102 APPENDIX D — WIRING DIAGRAMS (cont) Fig. J — 50FC-*04-06 208/230-1-60 Unit with RTU Open Controller...
  • Page 103 APPENDIX D — WIRING DIAGRAMS (cont) Fig. K — 50FC-*04-06 208/230-3-60 Unit with RTU Open Controller...
  • Page 104 APPENDIX D — WIRING DIAGRAMS (cont) Fig. L — 50FC-*04-06 460/575-3-60 Unit with RTU Open Controller...
  • Page 105 APPENDIX D — WIRING DIAGRAMS (cont) Fig. M — 50FC-*07 208/230 Unit with RTU Open Controller...
  • Page 106 APPENDIX D — WIRING DIAGRAMS (cont) Fig. N — 50FC-*07 460/575 Unit with RTU Open Controller...
  • Page 107 APPENDIX D — WIRING DIAGRAMS (cont) Fig. O — 50FC-*04-06 Power Wiring Diagram — 208/230-1-60...
  • Page 108 APPENDIX D — WIRING DIAGRAMS (cont) Fig. P — 50FC-*04-07 Power Wiring Diagram — 208/230-3-60...
  • Page 109 APPENDIX D — WIRING DIAGRAMS (cont) Fig. Q — 50FC-*04-07 Power Wiring Diagram — 460/575-3-60...
  • Page 110 APPENDIX D — WIRING DIAGRAMS (cont) ™ Fig. R — 50FC-*04-06 SystemVu Control Wiring Diagram (All Voltages)
  • Page 111 APPENDIX D — WIRING DIAGRAMS (cont) Fig. S — 50FC-*07 SystemVu ™ Control Wiring Diagram (All Voltages)
  • Page 112 APPENDIX D — WIRING DIAGRAMS (cont) Fig. T — 50FC-*04-06 SystemVu ™ Power Wiring Diagram — 208/230-1-60...
  • Page 113 APPENDIX D — WIRING DIAGRAMS (cont) Fig. U — 50FC-*04-07 SystemVu ™ Power Wiring Diagram — 208/230-3-60...
  • Page 114 APPENDIX D — WIRING DIAGRAMS (cont) Fig. V — 50FC-*04-07 SystemVu ™ Power Wiring Diagram — 460/575-3-60...
  • Page 115 APPENDIX E — LOW AMBIENT CONTROL SENSOR LOCATION Sensor Location Fig. W — 50FC-*04 Outdoor Circuiting Sensor Location Fig. Y — 50FC-*07 Outdoor Circuiting Sensor Location Fig. X — 50FC-*05/06 Outdoor Circuiting...

  • Page 118: Replaces: 50Fc-4-7-01Sm

    © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500336-01 Printed in U.S.A. Form 50FC-4-7-02SM Pg 118 7-23 Replaces: 50FC-4-7-01SM...
  • Page 119 START-UP CHECKLIST FOR 50FC-*04-07 SINGLE PACKAGE ROOFTOP ELECTRIC COOLING 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 120 (Y/N) _____ 10. Restore set points for thermostat and humidistat. (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. 04-53500336-01 Printed in U.S.A.

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