Carrier manual Wiring Schematic 52SQ Ð 208/230 V and 265 V RC Units

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				LEGEND
	CAP	Ð Capacitor	OL	Ð Overload	Component Connection (Marked)
	COMP	Ð Compressor	PL	Ð Plug
	CR	Ð Cooling Relay	PLS	Ð Primary Limit Switch	Component Connection (Unmarked)
	EQUIP GND Ð Equipment Ground		RVR	Ð Reversing Valve Relay
	FM	Ð Fan Motor	RVS	Ð Reversing Valve Solenoid	Terminal Board Connection
	FR	Ð Fan Relay	SLS	Ð Secondary Limit Switch	Field Control Wiring
	HR	Ð Heating Relay	SSS	Ð Speed Selector Switch	Field Control Wiring
	HR	Ð Heating Relay	SSS	Ð Speed Selector Switch	Accessory or Optional Wiring
	IFT	Ð Indoor Frost Thermostat	ST	Ð Start Thermistor	Accessory or Optional Wiring
	L	Ð Power Supply Line	TB	Ð Terminal Board	Factory Wiring
	OFT	Ð Outdoor Frost Thermostat	TRANS Ð Transformer		To Indicate Common Potential Only.
					Not to Represent Wire

NOTES:

1.Recommended for use on grounded power supply only.

2.Compressor and fan motor thermally protected.

3.Use copper conductors only.

4.All wiring must conform with NEC (National Electrical Code) and lo- cal codes.

5.Dashed lines indicate components when used.

6.Control center use thermostat part no. HH01AD045 or equivalent.

7.Field control wire suitable for NEC class 2 control circuit, at 24 volts.

FIGURE 87 Ð WIRING SCHEMATIC; 52SQ Ð 208/230 V AND 265 V RC UNITS

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Contents Contents Service Technician GuideSummary of DANGERS, WARNINGS, and Cautions IntroductionModel Number Nomenclature To Remove the Unit from the Wall Sleeve General DisassemblyTo Disconnect Power for CORD- Connected Unit To Open the Control BOXDuct Extension Screws Removing the AIR Baffle To Access INDOOR-AIR Section ComponentsTo Remove the TOP Cover Ð Remove the screw To Remove the AIR Discharge GrilleTo Remove the Discharge Deck To Access OUTDOOR-AIR Section ComponentsTo Remove the Gusset Removing Stator Consider the following safety issues before beginning General CleaningCleaning and Safety Component Cleaning ScheduleTools Needed Monthly CleaningCleaning the Indoor AIR Filter Ð Remove Replacing the Indoor AIR Filter Ð AccessReplacing the Vent AIR Filter Cleaning the Vent AIR FilterChassis Accessing the Indoor and Outdoor Seasonal CleaningDisconnect ALL Power to Unit Section Components on Cleaning the Indoor and Outdoor CoilsAccessing the Indoor FAN and Indoor Coils sectionDisconnect ALL Power to the Unit Cleaning the Indoor FAN and FANCleaning the Heater Assembly Ð Once Rotary Compressor Components CompressorBasic Hermetic Compressor Electrical Measurements Compressor TroubleshootingBasic Compressor Troubleshooting Guide SHORTED/OPEN Windings Test Compressor ReplacementRemoving the Compressor Ð Follow the steps Disconnect all power to unitRefrigerant Charging Ð Every mechanical Installed Filter DrierCommon Causes Heater Failure HeatersHeater Removal Removing Heater Screws Typical 52S Unit Operating Controls Operating ControlsOutside or Vent AIR Ð Push the FAN only Description of Switch SettingsNON-USER Adjustable Switches High Heat or High Cool Ð Push buttonHeat Pump Units Figure Sequence of OperationHEAT/COOL Units Figure Cooling only Units FigureTools Needed Component Operation and TroubleshootingIndoor Thermostat Heat Pump Units Outdoor Frost Thermostat Heat Pump Units Indoor Thermostat IT CONTACTS, ALL 52SQ AA and CP ModelsCapacitor Test Locked OUTOutdoor Frost Thermostat Screws Electrical Components Removal and ReplacementComponent Locations Open Control BOX FAN Motor FAN Motor TroubleshootingBasic FAN Motor Electrical Tests Typical 265 Volt Motors FAN Motor Troubleshooting Chart Typical 208/230 Volt MotorsRemoval FAN Motor ReplacementField Temperature Charts 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Wiring Schematic 52SC Ð 208/230 V and 265 V AA and CP Units Wiring SchematicsWiring Schematic 52SE Ð 208/230 V and 265 V AA and CP Units Wiring Schematic 52SE Ð 208/230 V and 265 V RC Units Wiring Schematic 52SQ Ð 208/230 V and 265 V AA and CP Units Wiring Schematic 52SQ Ð 208/230 V and 265 V RC Units Most Frequent Ptac Service Questions