Carrier 50FC A05 Series

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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

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Table of Contents1
Service and Maintenance Instructions1
Safety Considerations2
- Electrical Operation Hazard2
- Unit Damage Hazard2
- Outside Air Hood3
Unit Arrangement and Access3
General3
Routine Maintenance3
Filters3
- Manual Outside Air Hood Screen4
- Evaluating Motor Speed4
Supply Fan (Blower) Section4
Supply Fan (Direct-Drive)4
- Units with Electro-Mechanical Controls5
- Low Speed Fan Adjustment5
- 2-Pin DIP Switch5
- LOW SPEED 2-Pin DIP Switch Settings5
- Units with Systemvu Controls6
- Example of Fan Speed Set up Labels for Electro-Mechanical Controls6
- Fan Speed Set up6
- Factory Setting6
- Troubleshooting the Ecm Motor7
- Fault Condition/Reset Trigger7
- Fan Assembly Removal8
- Supply Fan Control Wiring Diagram8
- Removing the Motor and Fan Assembly8
- Disassembling Motor and Fan Assembly8
- Reinstalling Motor and Fan Assembly9
- Fan System Re-Assembly9
- Fan Assembly Install9
Staged Air Volume9
- Routine Cleaning of Coil Surfaces10
- Periodic Clean Water Rinse10
Cooling10
Condenser Coil Maintenance and Cleaning Recommendation10
- Condenser Coil Clips11
- Separating Coil Sections11
- Top Panel Position11
Evaporator Coil Metering Devices12
Thermostatic Expansion Valve (Txv)12
TXV Operation12
Replacing TXV12
- TXV Valve and Sensing Bulb Location13
- Access Port Assembly13
Refrigerant System Pressure Access Ports13
Low-Charge Cooling14
Puron (R-410A) Refrigerant14
Refrigerant Charge14
Cooling Charging Charts14
- Cooling Charging Chart - 5 Ton15
- Cooling Charging Chart - 4 Ton15
- Cooling Charging Chart - 6 Ton16
Lubrication16
Replacing Compressor16
Condenser-Fan Assembly — Screw Pattern Sequence17
Compressor Rotation17
Filter Drier17
Condenser-Fan Adjustment17
Troubleshooting Cooling System18
Weatherproof Cover Installation19
Convenience Outlets19
Installing Weatherproof Cover19
Non-Powered Type19
Duty Cycle20
Maintenance20
Fuse on Powered Type20
Electric Heaters20
- Single Point Boxes and Supplementary Fuses21
- Field Power Connections21
- Safety Devices21
Completing Heater Installation21
System22
Controller22
Smoke Detector Sensor22
Smoke Detector Locations22
- Return Air Smoke Detector Sensor with Economizer23
- Return Air Smoke Detector Sensor Without Economizer23
- Completing Installation of Return Air Smoke Detector23
- Using Remote Logic24
- Additional Application Data24
- Highlight D24
FIOP Smoke Detector Wiring and Response24
- Sensor Alarm Test Procedure25
- Dirty Sensor Test Procedure25
Sensor and Controller Tests25
Sensor Alarm Test25
Changing the Dirt Sensor Test25
Remote Station Test25
SD-TRK4 Remote Alarm Test Procedure25
Cleaning the Smoke Detector26
Remote Test/Reset Station Dirty Sensor Test26
Dirty Sensor Test Using an SD-TRK426
Detector Cleaning26
Indicators26
- Sensor’s Trouble Led Is on27
- Sensor’s Power Led Is off27
- Controller’s Power Led Is off27
Troubleshooting27
Protective Devices27
Compressor Protection27
Relief Device28
Control Circuit, 24-V28
Systemvu Control System28
Systemvu Interface28
Additional Systemvu Installation and Troubleshooting28
RTU Open Control Module29
Rtu Open Control System29
Sensory/Accessory Installation29
- Economi$Er IV Component Locations30
- Economi$Er2 Component Locations30
Additional RTU Open Installation and Troubleshooting30
Economizer Systems30
- Economi$Er2 with 4 to 20 Ma Control Wiring31
- Economi$Er IV Functional View32
- Typical Economi$Er IV (W7212 Controller) Wiring32
- Economi$Er IV Standard Sensors32
Economi$Er IV (Field-Installed Accessory)32
- Economi$Er IV Input/Output Logic33
- Supply Air Temperature (SAT) Sensor33
- Outdoor Air Temperature (OAT) Sensor33
- C7660 Temperature Sensor33
- Economi$Er IV Control Modes34
- Outdoor Dry Bulb Changeover34
- Outdoor Enthalpy Changeover34
- Differential Enthalpy Control34
- Vertical Economizer Barometric Relief Flow35
- Horizontal Economizer Barometric Relief Flow35
- Economi$Er IV W7212 Control35
- Outdoor-Air Damper Leakage35
- Indoor Air Quality (IAQ) Sensor Input36
- Exhaust Set Point Adjustment36
- Minimum Position Control36
- Thermostats37
- Occupancy Control37
- Demand Controlled Ventilation (DCV)37
- Sensor Configuration37
- DCV Minimum and Maximum Position38
- Differential Enthalpy38
- Single Enthalpy38
- Supply-Air Sensor Input38
- System Components39
- Economizer Module39
- S-Bus Enthalpy Control Sensors39
Economi$Er X (Factory Option)39
- Inputs40
- Sensors40
- Outputs40
- Actuator Signal40
- S-Bus Sensor Wiring41
- Interface Overview41
- User Interface41
- S-Bus Sensor DIP Switches41
- Time-Out and Screensaver42
- Menu Structure42
- W7220 Controller Navigation Buttons42
- W7220 Menu Structure43
- Legend47
- Enthalpy Settings48
- Single Enthalpy Curve Boundaries48
- Single Enthalpy and Dual Enthalpy High Limit Curves48
- Economizer Operation - FAN TYPE = 1SPEED49
- Standard or Single Speed Fan Operation49
- 2 Speed Fan Operation50
- Economizer Operation - FAN TYPE = 2SPEED50
- Checkout Tests51
- Power up51
- Initial Menu Display51
- Clearing Alarms51
Pre-Start-Up/Start-Up52
Start-Up, General52
Unit Preparation52
Additional Installation/Inspection52
Return-Air Filters52
Outdoor-Air Inlet Screens52
Compressor Mounting52
Internal Wiring52
Refrigerant Service Ports52
Compressor Rotation53
Cooling53
Heating53
Ventilation (Continuous Fan)53
Fastener Torque Values53
Start-Up, Rtu Open Controls53
Start-Up, Systemvu Controls53
Appendix A - Model Number Nomenclature54
50Fc 3 to 4 Ton Physical Data – Cooling55
Appendix B - Physical Data55
- 50Fc 5 to 6 Ton Physical Data – Cooling57
- General Fan Performance Notes58
Appendix C - Fan Performance58
- 50Fc-A04 Single Phase — 3 Ton Vertical Supply (Rpm - Bhp)59
- 50Fc-A04 Three Phase — 3 Ton Vertical Supply (Rpm - VDC)61
- 50Fc-A04 Three Phase – Standard Static — 3 Ton Vertical Supply61
- 50Fc-A05 Single Phase – Standard Static63
- 50Fc-A05 Single Phase — 4 Ton Vertical Supply (Rpm - Bhp)63
- 50Fc-A05 Three Phase — 4 Ton Vertical Supply (Rpm - Bhp)65
- 50Fc-A06 Single Phase — 5 Ton Vertical Supply (Rpm - Bhp)67
- 50Fc-M07 Three Phase — 6 Ton Vertical Supply (Rpm - Bhp)71
- 50Fc-A04 Single Phase — 3 Ton Horizontal Supply (Rpm - Bhp)73
- 50Fc-A06 Three Phase — 5 Ton Horizontal Supply (Rpm - Bhp)83
Appendix D - Wiring Diagrams87
- Wiring Diagrams91
- Low Ambient Control Sensor Location109
Appendix E - Low Ambient Control Sensor109
Start-Up Checklist111

Carrier 50FC A05 Series - Page 110

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