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

Single package rooftop electric cooling unit
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Service and Maintenance Instructions

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Condenser Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Condenser Coil Maintenance and Cleaning
Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . 10
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Evaporator Coil Metering Devices . . . . . . . . . . . . . . 12
Txv Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Replacing Txv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Puron (R-410A) Refrigerant . . . . . . . . . . . . . . 14
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cooling Charging Charts . . . . . . . . . . . . . . . . 14
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Replacing Compressor . . . . . . . . . . . . . . . . . . . . . . . 16
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 17
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . 17
Troubleshooting Cooling System . . . . . . . . . . . . . . 18
Convenience Outlets . . . . . . . . . . . . . . . . . . . . 19
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . . 19
Installing Weatherproof Cover . . . . . . . . . . . . . . . . . 19
Non-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unit-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Fuse On Powered Type . . . . . . . . . . . . . . . . . . . . . . . 20
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . 20
Completing Heater Installation . . . . . . . . . . . . . . . . 21
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . 22
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Smoke Detector Sensor . . . . . . . . . . . . . . . . . . . . . . 22
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 22
Completing Installation of Return Air Smoke
Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Sensor And Controller Tests . . . . . . . . . . . 25
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . 25
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500204-01
Single Package Rooftop Electric Cooling Unit
Printed in U.S.A.
Form 50FC-4-7-01SM Rev. A Pg 1
®
with Puron
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . .25
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Changing The Dirt Sensor Test . . . . . . . . . . . . . . . . .25
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . .25
Dirty Sensor Test Using An Sd-Trk4 . . . . . . . . . . .26
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Protective Devices . . . . . . . . . . . . . . . . . . . . . . .27
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .27
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Control Circuit, 24-V . . . . . . . . . . . . . . . . . . . . . . . . .28
Systemvu Control System . . . . . . . . . . . . . . . .28
Systemvu Interface . . . . . . . . . . . . . . . . . . . . . . . . . .28
Additional SystemVu Installation and
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .28
Rtu Open Control System . . . . . . . . . . . . . . . .29
Sensory/Accessory Installation . . . . . . . . . . . . . . . .29
Additional RTU Open Installation and
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .30
Economizer Systems . . . . . . . . . . . . . . . . . . . . .30
EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Economi$Er X (Factory Option) . . . . . . . . . . . . . . . .39
Pre-Start-Up/Start-Up . . . . . . . . . . . . . . . . . . . .52
Start-Up, General . . . . . . . . . . . . . . . . . . . . . . . .52
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Additional Installation/Inspection . . . . . . . . . . . . . .52
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .52
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . .52
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . .52
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . .53
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Ventilation (Continuous Fan) . . . . . . . . . . . . . . . . . .53
Fastener Torque Values . . . . . . . . . . . . . . . . .53
Start-Up, Rtu Open Controls . . . . . . . . . . . . .53
Start-Up, Systemvu Controls . . . . . . . . . . . .53
APPENDIX A — MODEL NUMBER
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . .54
APPENDIX B — PHYSICAL DATA . . . . . . . . . . . . . . .55
APPENDIX C — FAN PERFORMANCE . . . . . . . . . . .58
APPENDIX D — WIRING DIAGRAMS . . . . . . . . . . . .87
APPENDIX E — LOW AMBIENT CONTROL SENSOR
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Start-Up Checklist . . . . . . . . . . . . . . . . . . . . .CL-1
50FC04-07
(R-410A) Refrigerant
3 to 6 Nominal Tons
8-19
Replaces: New

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  • Page 1 50FC04-07 Single Package Rooftop Electric Cooling Unit ® with Puron (R-410A) Refrigerant 3 to 6 Nominal Tons Service and Maintenance Instructions SAFETY CONSIDERATIONS ....2 Dirty Controller Test .
  • Page 2 SAFETY CONSIDERATIONS WARNING Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. UNIT OPERATION AND SAFETY HAZARD Only trained and qualified service personnel should install, re- Failure to follow this warning could cause personal injury, pair, or service air-conditioning equipment.
  • Page 3 • 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 (Direct-Drive) All FC units have the EcoBlue™ direct drive vane axial fan 17 1/4” system. The fan is driven by an ECM motor with speed that is user set through the Unit Control Board (UCB). Speeds are ful- ly configurable from 40% to 100% of motor’s maximum speed.
  • Page 5 Units with Electro-mechanical controls The Fan Speed set up controls are located on the lower sec- tion of the Unit Control Board (UCB). See Fig. 7 for location. Check the job specifications for the CFM (cubic feet per minute) and ESP (external static pressure) required. Using the chart on the Fan Speed Set Up labels (see Fig.
  • Page 6 ESP in. wg Factory Setting: Calculator 7.8 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 ESP in. wg Calculator 1301 1477 1639 1788 1925 2054 2174 2289 1500 1381 1544 1699 1843 1976 2101 2220 2332 1625 1463 1615 1763 1902 2031 2152 2268 2378 1750 1548 1688 1828 1962 2087 2206 2318 1875 1633 1764 1897 2025...
  • Page 8 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 9 Set retaining rings (x3) into composite rotor and install 6 #10-32 x -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 screw instal- lation be done in a star pattern. 10.
  • Page 10 ROUTINE CLEANING OF COIL SURFACES COOLING Periodic cleaning with Totaline environmentally balanced ® WARNING coil cleaner is essential to extend the life of coils. This cleaner is available from Replacement Components Division as part UNIT OPERATION AND SAFETY HAZARD number P902-0301 for a one gallon container, and part number Failure to follow this warning could cause personal injury, P902-0305 for a 5 gallon container.
  • Page 11 TOP VIEW TOP PANEL SUPPORT (FIELD-SUPPLIED) CONDENSER CENTER COIL BAFFLE HAIRPIN 102 mm (4" MAX) SPACER COMPRESSOR (FIELD-SUPPLIED) INNER ACCESS COIL PANEL SECTION Fig. 16 — Top Panel Position OUTER Remove the compressor access panel to access the lower COIL coil clip.
  • Page 12 Thoroughly apply Totaline environmentally balanced coil THERMOSTATIC EXPANSION VALVE (TXV) cleaner solution to all coil surfaces including finned area, All 50FC 04-06 units equipped with the Humidi-MiZer option tube sheets and coil headers. and all 50FC 07 units include TXV control. The TXV is a Hold garden sprayer nozzle close to finned areas and apply bi-flow, bleed port expansion valve with an external equalizer.
  • Page 13 Refrigerant System Pressure Access Ports There are two access ports in the system: on the suction tube near the compressor and on the discharge tube near the com- pressor. These are brass fittings with black plastic caps. The hose connection fittings are standard -in.
  • Page 14 Refrigerant Charge Amount of refrigerant charge is listed on the unit’s nameplate. Refer to Carrier GTAC2-5 Charging, Recovery, Recycling and Reclamation training manual and the following procedures. Unit panels must be in place when unit is operating during the charging procedure.
  • Page 15 Cooling Charging Chart Std Tier 4 Ton Cooling Charging Chart Std Tier 5 Ton R-410A Refrigerant R-410A Refrigerant 1241 1241 OUTDOOR OUTDOOR OUTDOOR TEMP TEMP TEMP 1172 1172 °F / °C °F / °C °F / °C 115 / 46 115 / 46 115 / 46 105 / 41...
  • Page 16 COMPRESSOR 2-Stage Cooling Charging Chart Std Tier 6 Ton (Unit must run high stage compressor and Lubrication outdoor fan on high speed) The compressor is charged with the correct amount of oil at the factory. CAUTION UNIT DAMAGE HAZARD Add Charge if Failure to follow this caution may result in damage to com- Above the Curve ponents.
  • Page 17 Replace compressor if suction/discharge pressures are not Compressor Rotation within specifications for the specific compressor. CAUTION The suction and discharge pressure levels should now move to their normal start-up levels. EQUIPMENT DAMAGE HAZARD Failure to follow this caution can result in premature wear Filter Drier and damage to equipment.
  • Page 18 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 19 CONVENIENCE OUTLETS GFCI RECEPTACLE NOT INCLUDED COVER - WHILE-IN-USE WEATHERPROOF WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal inju- ry or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status be- fore opening unit for service.
  • Page 20 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 ce- ramic insulators and control contactor(s), using a combination of 24-v control side break/auto-reset or line-break/auto-reset limit switches and a pilot-circuit/manual reset limit switch to protect the unit against over-temperature situations.
  • Page 21 STATOR MANUAL RESET LIMIT SWITCH HEATER MODULE Fig. 36 — 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 22 SMOKE DETECTORS 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 combina- tion of supply air and return air. Return air smoke detectors are arranged for vertical return configurations only.
  • Page 23 RETURN AIR SMOKE DETECTOR SENSOR WITH ECONOMIZER The sampling tube is inserted through the side plates of the SUPPLY AIR SMOKE DETECTOR economizer housing, placing it across the return air opening on the unit basepan. See Fig. 44. The holes in the sampling tube face downward, into the return air stream.
  • Page 24 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. 46. The FIOP smoke detector is configured to automatically shut down all unit operations when a smoke condition is detected. RETURN AIR SMOKE DETECTOR (Operating Position Shown) See Fig.
  • Page 25 SENSOR AND CONTROLLER TESTS IMPORTANT: Failure to follow this ALERT can result in Sensor Alarm Test an 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 than seven seconds will put the duct detector into the alarm alarm state.
  • Page 26 Disconnect power from the duct detector then remove the Remote Test/Reset Station Dirty Sensor Test sensor’s cover. See Fig. 49. The test/reset station dirty sensor test checks the test/reset sta- tion’s ability to initiate a sensor dirty test and indicate the re- sults.
  • Page 27 An internal sensor fault is detected upon entering the trouble SENSOR’S TROUBLE LED IS ON state: Check the sensor’s Dirty LED. If it is flashing, the sensor • The contacts on the controller’s supervisory relay switch is dirty and must be cleaned. positions.
  • Page 28 Additional SystemVu Installation and Trouble- The SystemVu control system is fully communicating and shooting cable-ready for connection to the Carrier Comfort Network ® Additional installation, wiring and troubleshooting information (CCN), Carrier i-Vu , and Third Party BACnet building man- ®...
  • Page 29 The RTU Open controller is an integrated component of the nects to the RTU Open must be routed through the raceway Carrier rooftop unit. Its internal application programming pro- built into the corner post of the unit or secured to the unit con- vides optimum performance and energy efficiency.
  • Page 30 Additional RTU Open Installation and Trouble- OUTSIDE AIR shooting TEMPERATURE SENSOR Additional installation, wiring and troubleshooting information ECONOMI$ER X HARNESS for the RTU Open Controller can be found in the following manual: “48/50FC, 48/50GC Single Package Rooftop Units with RTU Open Controls, Start-up, Operation and Trouble- shooting Instructions.”...
  • Page 31 EconoMi$er2 IMPORTANT: The optional EconoMi$er ® 2 does not include a controller. The EconoMi$er2 is operated by a 4 to 20 mA signal from an existing field-supplied control- ler. See Fig. 56 for wiring information. BLACK TRANSFORMER GROUND BLUE 500 OHM RESISTOR VIOLET PINK...
  • Page 32 EconoMi$er IV (Field-Installed Accessory) IMPORTANT: For FC rooftop units EconoMi$er IV is avail- able 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. 57. Typical settings, sensor ranges, and jumper positions are also shown.
  • Page 33 Table 6 — EconoMi$er IV Input/Output Logic INPUTS OUTPUTS Demand Enthalpy* Compressor N Terminal† Controlled Ventilation Outdoor Return Stage 1 Stage 2 Occupied Unoccupied (DCV) High (Free Cooling Minimum position Closed LED Off) Below set (DCV LED Off) Modulating** (between Modulating** (between min.
  • Page 34 DIP SWITCH CHANGEOVER Table 7 — Supply Air Sensor Temperature/Resistance Values POSITION TEMPERATURE TEMPERATURE (F) RESISTANCE (ohms) 220,250 48°F 100,000 1 2 3 53,010 29,091 53°F 16,500 9,795 1 2 3 5,970 3,747 55°F 3,000 1 2 3 2,416 1,597 58°F 1,080 1 2 3...
  • Page 35 HORIZONTAL ECONOMIZER BAROMETRIC RELIEF FLOW VERTICAL ECONOMIZER BAROMETRIC RELIEF FLOW 2500 2500 Horizontal Economizers Vertical Economizers 2000 2000 1500 1500 3-5 Ton 3-5 Ton 6 Ton 6 Ton 1000 1000 0.05 0.15 0.25 0.05 0.15 0.25 RETURN DUCT STATIC PRESSURE (in. wg) RETURN DUCT STATIC PRESSURE (in.
  • Page 36 Exhaust Set Point Adjustment The exhaust set point will determine when the exhaust fan runs (29) (32) (35) (38) (41) (43) based on damper position (if accessory power exhaust is in- CONTROL CONTROL POINT stalled). The set point is modified with the Exhaust Fan set CURVE APPROX.
  • Page 37 EconoMi$er IV control will be in occu- Use setting 1 or 2 for Carrier equipment. pied mode. When the timeclock contacts are open (removing Press Clear and Mode buttons. Hold at least 5 seconds the 24-v signal from terminal N), the EconoMi$er IV will be in until the sensor enters the Edit mode.
  • Page 38 If connected, remove sensor from terminals SO and +. DCV MINIMUM AND MAXIMUM POSITION Connect 1.2 kilo-ohm 4074EJM checkout resistor across To check the DCV minimum and maximum position: terminals SO and +. Make sure EconoMi$er IV preparation procedure has been Put 620-ohm resistor across terminals SR and +.
  • Page 39 Economizer Module Economi$er X (Factory Option) The module is the core of the EconoMi$er X system. The mod- The EconoMi$er X system is an expandable economizer con- ® ule is mounted in the unit’s control box, and includes the user trol system, which includes a W7220 economizer module (con- interface for the system.
  • Page 40 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 41 Table 9 — Economizer Module - Right Hand Terminal Table 10 — HH57AC081 Sensor Wiring Terminations Blocks TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS Communications AUX2 I 24 vac IN The first terminal is not used. S-BUS S-BUS (Enthalpy Control...
  • Page 42 • Press the ▼ (Down arrow) button to move to the next Press the (Enter) button to accept the displayed value menu. and store it in nonvolatile RAM. “CHANGE STORED” displays. • Press the (Enter) button to display the first item in the currently displayed menu.
  • Page 43 Table 12 — W7220 Menu Structure* PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † ECONO AVAIL YES/NO FIRST STAGE COOLING DEMAND (Y1–IN) YES = economizing available; the system can use outside air for free cooling when required ECONOMIZING YES/NO FIRST STAGE COOLING RELAY OUTPUT...
  • Page 44 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † MECH COOL ON 0, 1, or 2 Displays stage of mechanical cooling that is active. HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS FAN SPEED LOW or HIGH...
  • Page 45 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † ERV OAT SP 32°F 0 to 50°F ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR †† increment by 1 TEMPERATURE SETPOINT Only displayed when AUX1 O = ERV EXH1 SET 0 to 100% Exhaust fan set point for single speed units.
  • Page 46 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † STG3 DLY 2.0h 0 min, 5 min, COOLING STAGE 3 DELAY 15 min, then Delay after stage 2 cool has been active. Turns on second stage of 15 min intervals.
  • Page 47 Table 12 — W7220 Menu Structure* (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT † DA SYLK T ERR DISCHARGE AIR S-BUS SENSOR ERROR Discharge air sensor has failed or become disconnected - check wiring then replace sensor if the alarm continues. OA SENS T ERR OUTSIDE AIR TEMPERATURE SENSOR ERROR Outdoor air temperature sensor has failed or become disconnected -...
  • Page 48 Enthalpy Settings point are all below the selected boundary, the economizer sets the economizing mode to YES, economizing is available. When the OA temperature, enthalpy and dew point are below the respective setpoints, the Outdoor Air can be used for econ- When all of the OA conditions are above the selected bound- omizing.
  • Page 49 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 50 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 The 2 speed fan delay is available when the system is pro- using a 2 speed supply fan.
  • Page 51 2SP H/C and 3 Speed Fan Operation Checkout Tests FAN TYPE = 2SP H/C and FAN TYPE = 3SPEED are not Use the Checkout menu (see page 46) to test the damper opera- used on 50FC units. tion and any configured outputs. Only items that are config- ured are shown in the Checkout menu.
  • Page 52 c. Inspect all field-wiring and factory-wiring connec- PRE-START-UP/START-UP tions. Be sure that connections are completed and tight. Be sure that wires are not in contact with refrig- WARNING erant tubing or sharp edges. d. Inspect coil fins. If damaged during shipping and han- PERSONAL INJURY HAZARD dling, carefully straighten fins with a fin comb.
  • Page 53 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 CAUTION above room temperature. Set fan to AUTO position. EQUIPMENT DAMAGE HAZARD First stage of thermostat energizes the first stage of the electric Failure to follow this caution can result in premature wear heaters.
  • Page 54 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 ®...
  • Page 55 APPENDIX B — PHYSICAL DATA 50FC 3 TO 4 TON PHYSICAL DATA – COOLING 50FC UNIT 50FC*A04 50FC*B04 50FC*A05 50FC*B05 NOMINAL TONS BASE UNIT OPERATING WT (lb)* REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1/ Scroll Puron ® (R-410A) charge A/B (lbs-oz) —...
  • Page 56 APPENDIX B — PHYSICAL DATA 50FC 3 TO 4 TON PHYSICAL DATA – COOLING (cont) 50FC UNIT 50FC*A04 50FC*B04 50FC*A05 50FC*B05 CONDENSER FAN AND MOTOR Qty / Motor Drive Type 1 / Direct Motor HP/RPM / 1100 Fan Diameter (in.) FILTERS RA Filter Qty / Size (in.) 2 / 16x25x2...
  • Page 57 APPENDIX B — PHYSICAL DATA 50FC 5 TO 6 TON PHYSICAL DATA – COOLING 50FC UNIT 50FC*A06 50FC*B06 50FC*M07 50FC* N07 NOMINAL TONS BASE UNIT OPERATING WT (lb) 50FC* REFRIGERATION SYSTEM No. Circuits/No. Compressors/Type 1 / 1 / Scroll 1 / 1 / 2-Stage Scroll Puron ®...
  • Page 58 APPENDIX C — FAN PERFORMANCE GENERAL FAN PERFORMANCE NOTES 1. Interpolation is permissible. Do not extrapolate. 2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static pressure caused by any FIOPs or accessories. 3.
  • Page 59 APPENDIX C — FAN PERFORMANCE 50FC-A04 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 1050...
  • Page 60 APPENDIX C — FAN PERFORMANCE 50FC-A04 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 1175...
  • Page 61 APPENDIX C — FAN PERFORMANCE 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 1050...
  • Page 62 APPENDIX C — FAN PERFORMANCE 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 1175...
  • Page 63 APPENDIX C — FAN PERFORMANCE 50FC-A05 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 1849...
  • Page 64 APPENDIX C — FAN PERFORMANCE 50FC-A05 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 1886...
  • Page 65 APPENDIX C — FAN PERFORMANCE 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 1843...
  • Page 66 APPENDIX C — FAN PERFORMANCE 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 1887...
  • Page 67 APPENDIX C — FAN PERFORMANCE 50FC-A06 SINGLE PHASE — 5 TON VERTICAL SUPPLY (RPM - BHP) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 1301 0.24 1476 0.35 1639 0.47 1788 0.62 1925 0.77 1625 1381 0.28 1545 0.40 1700 0.53 1843 0.67 1976...
  • Page 68 APPENDIX C — FAN PERFORMANCE 50FC-A06 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 2031...
  • Page 69 APPENDIX C — FAN PERFORMANCE 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 1977...
  • Page 70 APPENDIX C — FAN PERFORMANCE 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 2031...
  • Page 71 APPENDIX C — FAN PERFORMANCE 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 2011...
  • Page 72 APPENDIX C — FAN PERFORMANCE 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 2071...
  • Page 73 APPENDIX C — FAN PERFORMANCE 50FC-A04 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 1050...
  • Page 74 APPENDIX C — FAN PERFORMANCE 50FC-A04 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 1140...
  • Page 75 APPENDIX C — FAN PERFORMANCE 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 1050...
  • Page 76 APPENDIX C — FAN PERFORMANCE 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 1140...
  • Page 77 APPENDIX C — FAN PERFORMANCE 50FC-A05 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 1851...
  • Page 78 APPENDIX C — FAN PERFORMANCE 50FC-A05 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 1882...
  • Page 79 APPENDIX C — FAN PERFORMANCE 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 1850...
  • Page 80 APPENDIX C — FAN PERFORMANCE 50FC-M05 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 1883...
  • Page 81 APPENDIX C — FAN PERFORMANCE 50FC-A06 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 1960...
  • Page 82 APPENDIX C — FAN PERFORMANCE 50FC-A06 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 2006...
  • Page 83 APPENDIX C — FAN PERFORMANCE 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 1960...
  • Page 84 APPENDIX C — FAN PERFORMANCE 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 2006...
  • Page 85 APPENDIX C — FAN PERFORMANCE 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 1973...
  • Page 86 APPENDIX C — FAN PERFORMANCE 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 2032...
  • Page 87 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 88 APPENDIX D — WIRING DIAGRAMS Fig. B — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 208/230-1-60 (with W7212 Control)
  • Page 89 APPENDIX D — WIRING DIAGRAMS Fig. C — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7212 Control)
  • Page 90 APPENDIX D — WIRING DIAGRAMS Fig. D — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7212 Control)
  • Page 91 APPENDIX D — WIRING DIAGRAMS Fig. E — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 208/230-1-60 (with W7220 Control)
  • Page 92 APPENDIX D — WIRING DIAGRAMS Fig. F — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7220 Control)
  • Page 93 APPENDIX D — WIRING DIAGRAMS Fig. G — 50FC**04-06 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7220 Control)
  • Page 94 APPENDIX D — WIRING DIAGRAMS Fig. H — 50FC**07 Electro-Mechanical Control Wiring Diagram — 208/230-3-60 (with W7220 Control)
  • Page 95 APPENDIX D — WIRING DIAGRAMS Fig. I — 50FC**07 Electro-Mechanical Control Wiring Diagram — 460/575-3-60 (with W7220 Control)
  • Page 96 APPENDIX D — WIRING DIAGRAMS Fig. J — 50FC**04-06 208/230-1-60 Unit with RTU Open Controller...
  • Page 97 APPENDIX D — WIRING DIAGRAMS Fig. K — 50FC**04-06 208/230-3-60 Unit with RTU Open Controller...
  • Page 98 APPENDIX D — WIRING DIAGRAMS Fig. L — 50FC**04-06 460/575-3-60 Unit with RTU Open Controller...
  • Page 99 APPENDIX D — WIRING DIAGRAMS Fig. M — 50FC**07 208/230 Unit with RTU Open Controller...
  • Page 100 APPENDIX D — WIRING DIAGRAMS Fig. N — 50FC**07 460/575 Unit with RTU Open Controller...
  • Page 101 APPENDIX D — WIRING DIAGRAMS Fig. O — 50FC**04-06 Power Wiring Diagram — 208/230-1-60...
  • Page 102 APPENDIX D — WIRING DIAGRAMS Fig. P — 50FC**04-07 Power Wiring Diagram — 208/230-3-60...
  • Page 103 APPENDIX D — WIRING DIAGRAMS Fig. Q — 50FC**04-07 Power Wiring Diagram — 460/575-3-60...
  • Page 104 APPENDIX D — WIRING DIAGRAMS Fig. R — 50FC**04-06 SystemVu™ Control Wiring Diagram (All Voltages)
  • Page 105 APPENDIX D — WIRING DIAGRAMS Fig. S — 50FC**07 SystemVu™ Control Wiring Diagram (All Voltages)
  • Page 106 APPENDIX D — WIRING DIAGRAMS Fig. T — 50FC**04-06 SystemVu™ Power Wiring Diagram — 208/230-1-60...
  • Page 107 APPENDIX D — WIRING DIAGRAMS Fig. U — 50FC**04-07 SystemVu™ Power Wiring Diagram — 208/230-3-60...
  • Page 108 APPENDIX D — WIRING DIAGRAMS Fig. V — 50FC**04-07 SystemVu™ Power Wiring Diagram — 460/575-3-60...
  • Page 109 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 110 © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500204-01 Printed in U.S.A. Form 50FC-4-7-01SM Rev. A Pg 110 8-19 Replaces: New...
  • Page 111 START-UP CHECKLIST 50FC04-07 SINGLE PACKAGE ROOFTOP COOLING ONLY/ELECTRIC HEAT 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 Service and Maintenance Instruction document.
  • Page 112 5. Turn off heating, cooling, and reheat, restore set points for thermostat and humidistat (Y/N) _____ © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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