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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 1
8-19
Replaces: New
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
THERMOSTATIC EXPANSION VALVE (TXV) . . . . . 12
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Replacing TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant System Pressure Access Ports . . . . . . 13
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
FIOP Smoke Detector Wiring and Response . . . . . 24
SENSOR AND CONTROLLER TESTS . . . . . . . . . . . 25
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . 25
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . .25
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Changing the Dirt Sensor Test . . . . . . . . . . . . . . . . .25
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . .25
SD-TRK4 Remote Alarm Test Procedure . . . . . . . . .25
Remote Test/Reset Station Dirty Sensor Test . . . . .26
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 IV (Field-Installed Accessory) . . . . . . .32
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
Single Package Rooftop Electric Cooling Unit
with Puron
®
(R-410A) Refrigerant
3 to 6 Nominal Tons
Summary of Contents for 50FC A04 Series
Page 96: ...96 APPENDIX D WIRING DIAGRAMS Fig J 50FC 04 06 208 230 1 60 Unit with RTU Open Controller...
Page 97: ...97 APPENDIX D WIRING DIAGRAMS Fig K 50FC 04 06 208 230 3 60 Unit with RTU Open Controller...
Page 98: ...98 APPENDIX D WIRING DIAGRAMS Fig L 50FC 04 06 460 575 3 60 Unit with RTU Open Controller...
Page 99: ...99 APPENDIX D WIRING DIAGRAMS Fig M 50FC 07 208 230 Unit with RTU Open Controller...
Page 100: ...100 APPENDIX D WIRING DIAGRAMS Fig N 50FC 07 460 575 Unit with RTU Open Controller...
Page 101: ...101 APPENDIX D WIRING DIAGRAMS Fig O 50FC 04 06 Power Wiring Diagram 208 230 1 60...
Page 102: ...102 APPENDIX D WIRING DIAGRAMS Fig P 50FC 04 07 Power Wiring Diagram 208 230 3 60...
Page 103: ...103 APPENDIX D WIRING DIAGRAMS Fig Q 50FC 04 07 Power Wiring Diagram 460 575 3 60...
Page 104: ...104 APPENDIX D WIRING DIAGRAMS Fig R 50FC 04 06 SystemVu Control Wiring Diagram All Voltages...
Page 105: ...105 APPENDIX D WIRING DIAGRAMS Fig S 50FC 07 SystemVu Control Wiring Diagram All Voltages...
Page 106: ...106 APPENDIX D WIRING DIAGRAMS Fig T 50FC 04 06 SystemVu Power Wiring Diagram 208 230 1 60...
Page 107: ...107 APPENDIX D WIRING DIAGRAMS Fig U 50FC 04 07 SystemVu Power Wiring Diagram 208 230 3 60...
Page 108: ...108 APPENDIX D WIRING DIAGRAMS Fig V 50FC 04 07 SystemVu Power Wiring Diagram 460 575 3 60...