Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 38AU Condenser Fans/Motors Access Panel Control Box, Compressors Service Valves, C10087

Models: 38AU

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38AU

Condenser Fans/Motors

Access Panel -

Control Box &

Compressors

Service

Valves

C10087

Fig. 34 - 38AUD Size 16 Cabinet

C10095

Fig. 35 - 38AUD*16 Piping

Page 38

Image 38

Carrier Condenser Fans/Motors Access Panel Control Box, Compressors Service Valves, 38AUD Size 16 Cabinet, C10087

Contents

38AU Air Cooled Condensing Units 60 Hz CONTENTSInstallation, Start---Upand Service Instructions With PuronR R---410ARefrigerant SizesReplacement/Retrofit - R-22to PuronR SAFETY CONSIDERATIONSINSTALLATION GUIDELINE UNIT OPERATION AND SAFETY HAZARD38AU InstallationUNIT DAMAGE HAZARD Fig. 1 - 38AU**16 Unit Dimensions 38AUUNIT Fig. 2 - 38AU**25 Unit Dimensions38AU 38AUZ*2538AU UNIT SIZE 38AU38AU UNIT SIZE 38AU38AU UNIT SIZE 38AU38AU UNIT SIZE 38AUFig. 4 - Serial Number Nomenclature 3 8 A U Z A 2 5 A 0 G 6 A 0 A 0 AFig. 3 - Model Number Nomenclature 38AUFig. 5 - Service Clearance Dimensional Drawing INSTALLATIONStep 2 - Complete Pre-InstallationChecks Matching 38AU Model To Evaporator CoilStep 4 - Rig and Mount the Unit Provide Safety ReliefStep 3 - Prepare Unit Mounting Support Step 5 - Complete Refrigerant Piping Connections38AU Liquid LiftSuction Riser Model38AUD Piping Connections Insulate Suction LinesHot Gas Bypass 38AUFig. 7 - Typical Evaporator Coil Connections 40RU Fig. 6 - 38AUD Service Valve LocationsInstall Filter Driers and Moisture Indicators Puron-dutyFilter DriersTypical 38AUD Systems Install Liquid Line Solenoid ValveTypical 38AUZ Systems Capacity Control Liquid Line Solenoid ValveEvacuation/Dehydration Step 6 - Install AccessoriesFig. 10 - Typical Piping Connection Assembly Preliminary ChargeUnits Without Factory-InstalledDisconnect Field Power SupplyFig. 11 - Disconnect Switch and Unit Units with Factory-InstalledDisconnectConvenience Outlets Fig. 12 - Power Wiring ConnectionsFig. 14 - Powered Convenience Outlet Wiring ELECTRICAL OPERATION HAZARDConvenience Outlet Utilization Fig. 16 - Weatherproof Cover InstallationField Control Wiring 38AUFig. 19 - Control Transformer Wiring 38AUD Control Circuit WiringControl Transformer Wiring ThermostatLegend and Notes for Table 5.Unbalanced 3-PhaseSupply Voltage38AU START-UP To correct phase orderPRE-START-UP System CheckUsing plotted operating point Advanced Scroll Temperature Protection ASTPAdjust Refrigerant Charge Start UnitFig. 22 - Recommended Oil Level - 38AUZ*25 Fig. 23 - 38AUZ*16 Charging Chart Novation38AUZ*25 Check Compressor Oil Level Final ChecksCIRCUIT Fig. 24 - 38AUD*16 Charging Chart Novation38AU CIRCUIT38AU Fig. 25 - 38AUZ*16 Charging Chart RTPFFig. 26 - 38AUZ*25 Charging Chart RTPF C10947C10949 Fig. 27 - 38AUD*16 Charging Chart RTPF38AU C10950 Fig. 28 - 38AUD*25 Charging Chart RTPF38AU 38AU C10212A38AU C10213AIndoor Supply Fan OPERATING SEQUENCEBase Unit Controls Cooling, Unit Without EconomizerSeasonal Maintenance ROUTINE SYSTEM MAINTENANCESERVICE Synthetic Roof Precautionary ProcedureFig. 31 - CoreMax Access Port Assembly Field Refrigerant Access PortsFactory High-FlowAccess Ports SEAT38AU Comfort Alert Diagnostic ModuleFig. 32 - CADM Housing/LED Locations 38AU Table 11 - LED Status CodesStatus LED Troubleshooting Information Status LEDLow-PressureSwitch Table 12 - CADM TroubleshootingCompressor Overtemperature Protection IP High-PressureSwitchFig. 34 - 38AUD Size 16 Cabinet Condenser Fans/Motors Access Panel Control BoxCompressors Service Valves Fig. 35 - 38AUD*16 PipingEqualization LPS Fig. 36 - 38AUZ*16 Compressor Assembly Rear ViewFig. 37 - 38AUD*16 Compressor Assembly Rear View Oil Equalizer LineCondenser Fans/Motors Access Panel Control Box Fig. 38 - 38AUZ,D Size 25 CabinetFig. 39 - 38AUD*25 Piping Compressors Service Valves38AU Fig. 40 - 38AUZ*25 Compressor Assembly Rear ViewFig. 41 - 38AUD*25 Compressor Assembly Rear View C10215Coil Type Identification NOVATION Coil Cleaning and MaintenanceRepairing NOVATION Condenser Tube Leaks NOVATIONt TypeUNIT DAMAGE HAZARD Replacing NOVATIONt Condenser CoilUNIT RELIABILITY HAZARD 38AUTable 13 - Torque Values TROUBLESHOOTINGFASTENER TORQUE VALUES 38AUTROUBLESHOOTING cont 38AUAPPENDIX B Wiring Diagram ListAPPENDIX A Air Conditioner & Heat Pump with PURON→APPENDIX C Low Ambient Option - Factory InstalledTroubleshooting Operation38AUZ*16 & 38AUD*16 Novation Fig. 44 - Motormaster Sensor LocationFig. 45 - Motormaster Sensor Location 38AUZ*16/25 & 38AUD*16/25 RTPFTable 14 - Wind Baffle Dimension 38AUC10363A Fig. 46 - Wind Baffles - Fabrication38AU 38AU C10366LEFT Fig. 48 - Wind Baffle Installation - 15 Ton UnitsFRONT BACKBACK Fig. 49 - Wind Baffle Installation - 20 Ton UnitsFRONT LEFTEdition Date 11/10 38AUCatalog No 38AU---09SI Replaces 38AU---07SIII. PRE-START-UP START-UPCHECKLISTI. PRELIMINARY INFORMATION OUTDOOR UNITCHECK VOLTAGE IMBALANCE 38AU