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Bryant R-22 service manual BasicCabinet Designs, Electrical, I. Aluminum Wire

Models: R-22

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Fig. 8—Basic Cabinet Designs

A94003

Fig. 8—Basic Cabinet Designs

ELECTRICAL

I. ALUMINUM WIRE

WARNING: Exercise extreme caution when working on any electrical components. Shut off all power to system prior to troubleshooting. Some troubleshooting tech- niques require power to remain on. In these instances, exercise extreme caution to avoid danger of electrical shock. ONLY TRAINED SERVICE PERSONNEL SHOULD PERFORM ELECTRICAL TROUBLE- SHOOTING.

Troubleshooting charts for air conditioning and heat pump units are provided in the back of this manual. They enable the service technician to use a systematic approach to locate the cause of a problem and correct system malfunctions.

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CAUTION: Aluminum wire may be used in the branch circuit (such as the circuit between the main and unit disconnect), but only copper wire may be used between the unit disconnect and the unit on Bryant systems.

Whenever aluminum wire is used in the branch-circuit wiring with this unit, adhere to the following recommendations.

Connections must be made in accordance with the National Electrical Code (NEC), using connectors approved for aluminum wire. The connectors must be UL-approved (marked Al/Cu with the UL symbol) for the application and wire size. The wire size selected must have a current capacity not less than that of the copper wire specified and must not create a voltage drop between the service panel and the unit in excess of 2 percent of the unit-rated voltage.

To prepare the wire before installing the connector, all aluminum wire must be ″ brush scratched″ and coated with a corrosion inhibiter such as Pentrox A. When it is suspected that the

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Bryant R-22 service manual BasicCabinet Designs, Electrical, I. Aluminum Wire

Contents

TABLE OF CONTENTS SAFETY CONSIDERATIONSApplication Guide and Service Manual INSTALLATION GUIDELINE II. ADD-ONREPLACEMENT RETROFITACCESSORY DESCRIPTIONS VIII. LOW-AMBIENTPRESSURE SWITCHII. INTERCONNECTING TUBING SIZING IX. WIND BAFFLEX. COASTAL FILTER XI. SUPPORT FEETBAFFLE ASSEMBLY SUPPORTBAFFLE Fig. 1—WindBaffle Construction for Reliant UnitsFig. 2—WindBaffle Construction for Cube Units BAFFLE ASSEMBLYSUPPORT TABLE 3—WINDBAFFLE DIMENSIONS FOR CUBE UNITS IN III. METERING DEVICE SIZINGFig. 3—TubeBend Losses TABLE 5—FITTINGLOSSES IN EQUIVALENT FTTABLE 6—CALCULATIONOF INDOOR PISTON NO TABLE 7—CALCULATIONOF OUTDOOR PISTON NOTABLE 8—COMMONPISTON SIZES TABLE 9—LIQUID-LINESOLENOID KIT PART NUMBERSV. CHARGING INFORMATION VI. 2–SPEEDAPPLICATIONSII. SERIAL NUMBER IDENTIFICATION Positions 6 through 10—SerialNumberII. REMOVE FAN-MOTOR ASSEMBLY—BEFORE1/1/92 CABINETI. REMOVE TOP COVER—BEFORE1/1/92 III. INFORMATION PLATE—RELIANTPRODUCTSVI. REMOVE FAN-MOTOR ASSEMBLY—AFTER1/1/92 I. ALUMINUM WIRE Fig. 8—BasicCabinet DesignsELECTRICAL Fig. 9—InformationPlate II. CONTACTORSFig. 11—Contactor III. CAPACITORS Fig. 12—CapacitorsFig. 13—PTCDevices Fig. 14—CapacitanceBoosting IV. CYCLE PROTECTORFig. 15—Cycle-ProtectorDevice V. CRANKCASE HEATERVI. TIME-DELAYRELAY Fig. 17—Cycle-ProtectorWiring Fig. 18—Wiringfor Single-PoleContactorVII. PRESSURE SWITCHES Fig. 16—Cycle-ProtectorSequenceVIII. DEFROST THERMOSTATS IX. DEFROST-CONTROLBOARDFig. 19—JumperDFT and R Terminals Fig. 20—InsertingJumper Wire Fig. 21—CheckingBetween C and W2TABLE 10—DEFROSTCONTROL SPEED-UPTIMING SE QUENCE FOR CES0110063/CES0130024TABLE 11—DEFROSTTIMER SETTINGS XI. SERVICE ALARM CONTROL BOARDX. FAN MOTORS OF2 CESO130076–00 TABLE 12—FANPOSITION Fig. 23—DefrostThermostat LocationFig. 24—FanPosition —23—Fig. 25—ServiceAlarm Wiring Connections XIII. COMPRESSOR PLUGFig. 27—CompressorPlug XIV. LOW-VOLTAGETERMINALS RECIPROCATING COMPRESSORI. MECHANICAL FAILURES Fig. 28—IdentifyingInternal Connections II. ELECTRICAL FAILURESIII. SYSTEM CLEANUP AFTER BURNOUT IV. COMPRESSOR REMOVAL AND REPLACEMENTCOPELAND SCROLL COMPRESSOR I. FEATURES II. TROUBLESHOOTINGTABLE 13—COMPRESSOROIL RECHARGE Fig. 29—ScrollCompressor Refrigerant FlowMILLENNIUM SCROLL COMPRESSOR I. FEATURES III. TROUBLESHOOTINGIV. SCROLL COMPRESSOR, 3–PHASEMONITOR Fig. 30—Locationof Discharge ThermostatFig. 31—CES0130075 3–PhaseMonitor Board Fig. 32—CESO130075 3–PhaseMonitor Wiring Diagram—30— TABLE 14—AMBIENTTEMPERATURE FOR HIGH- AND LOW-SPEEDOPERATIONFig. 33-Two-SpeedControl Board Fig. 34—SpeedupTerminalsTABLE 15—FUNCTIONLIGHT CODE AND DISPLAY LOCATION Fig. 35-TypicalCooling Balance PointsFig. 36—Low-VoltageControl Wiring III. FACTORY DEFAULTSTABLE 17—FACTORYDEFAULTS TABLE 16—COMPRESSORPTC RANGESFig. 37—Header-PinHousing VI. TROUBLESHOOTINGTHERMISTOR CURVE Fig. 38—EnergizingWindingsREFRIGERATION SYSTEM I. REFRIGERATION CYCLE II. LEAK DETECTIONFig. 40-Low-SpeedWindings Fig. 41—High-SpeedWindings—36— Fig. 42—HeatPump Refrigerant-FlowDiagrams TABLE 19—24VPIN CONNECTION TROUBLESHOOTINGFig. 43-LeakDetector III. BRAZING Fig. 44—ServiceValves IV. SERVICE VALVESFig. 45—Check-Flo-RaterComponents VI. REVERSING VALVEFig. 46—ReversingValve Fig. 47—ReversingValve Cooling Mode or DefrostMode, Solenoid Energized VII. THERMOSTATIC-EXPANSIONVALVES TXVFig. 48-ReversingValve Heating Mode, Solenoid De EnergizedVIII. THERMOSTATIC-EXPANSIONVALVE BI-FLOWTXV IX. COIL REMOVALFig. 49—TXVin Cooling Mode Fig. 50—TXVin Heating Mode—42— XI. ACCUMULATOR XII. CONTAMINANT REMOVALFig. 51—Accumulator XIII. SYSTEM CHARGINGTABLE 21—SUPERHEATCHARGING TABLE TABLE 22-REQUIREDVAPOR TEMPERATURE FCARE AND MAINTENANCE TABLE 24—REQUIRED LIQUID-LINETEMPERATURE Special maintenance requirements are as follows Desert and Seacoast Locations—47— AIR CONDITIONER TROUBLESHOOTING CHART Fig. 52—Air-ConditionerTroubleshooting ChartHEAT PUMP TROUBLESHOOTING–COOLINGCYCLE —49—HEAT PUMP TROUBLESHOOTING–HEATINGCYCLE —50——51— —52— Printed in U.S.Asm01,025 Catalog No.