Carrier 50GCQ Series - Page 85

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APPENDIX D — WIRING DIAGRAMS (cont)

Fig. B — 50GCQ 04-06 Electro-Mechanical Control Wiring Diagram — 208/230-1-60, 208/230-3-60 Units (with W7220 Control)

Main Page

Table of Contents1
Safety Considerations2
Unit Arrangement and Access3
General3
Routine Maintenance3
Filters3
Supply Fan (Blower) Section4
Supply Fan (Direct-Drive)4
Staged Air Volume10
Cooling10
Condenser Coil (Outdoor)10
Evaporator Coil (Indoor)10
Condenser Coil Maintenance and Cleaning10
Recommendation10
Evaporator Coil12
Refrigeration System Components12
Evaporator Coil Metering Devices12
Thermostatic Expansion Valve (Txv)13
TXV Operation13
Replacing TXV13
Refrigerant System Pressure Access Ports14
Puron (R-410A) Refrigerant15
Refrigerant Charge15
Cooling Charging Charts15
Compressor16
Lubrication16
Replacing Compressor16
Compressor Rotation16
Filter Drier17
Condenser-Fan Adjustment17
Troubleshooting Cooling System18
Convenience Outlets19
Installing Weatherproof Cover19
Non-Powered Type19
Unit-Powered Type19
Duty Cycle20
Maintenance20
Fuse on Powered Type20
Commerical Defrost Control20
Reversing Valve Control21
Compressor Control21
Auxiliary (Electric) Heat Control21
Defrost22
Electric Heaters22
Single Point Boxes and Supplementary Fuses23
Safety Devices23
Completing Heater Installation23
Smoke Detectors24
System24
Controller24
Smoke Detector Sensor24
Smoke Detector Locations24
Completing Installation of Return Air Smoke25
Detector25
FIOP Smoke Detector Wiring and Response26
Sensor and Controller Tests27
Sensor Alarm Test27
Controller Alarm Test27
Dirty Controller Test27
Dirty Sensor Test27
Changing the Dirty Sensor Test27
Remote Station Test27
SD-TRM4 Remote Alarm Test Procedure28
Remote Test/Reset Station Dirty Sensor Test28
Dirty Sensor Test Using an SD-TRM428
Detector Cleaning28
Indicators28
Troubleshooting29
Protective Devices30
Compressor Protection30
Relief Device30
Control Circuit, 24-V30
Systemvu Control System30
Systemvu Interface30
Additional Systemvu Installation and Troubleshooting30
Rtu Open Control System32
Sensory/Accessory Installation32
Additional RTU Open Installation and Troubleshooting33
Economizer Systems33
Economi$Er 234
Economi$Er IV (Field-Installed Accessory)35
Economi$Er X (Factory Option)42
Pre-Start-Up/Start-Up53
Start-Up, General54
Unit Preparation54
Additional Installation/Inspection54
Return-Air Filters54
Outdoor-Air Inlet Screens54
Compressor Mounting54
Internal Wiring54
Refrigerant Service Ports54
Compressor Rotation54

Carrier 50GCQ Series - Page 85

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