Catalog No 38AU---09SI | Carrier guide

38AU

Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231	Printed in U.S.A.	Edition Date: 11/10	Catalog No: 38AU---09SI

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.			Replaces: 38AU--- 07SI

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Carrier appendix Catalog No 38AU---09SI

Contents

Installation, Start---Up Service Instructions Contents Safety Considerations Installation GuidelineReplacement/Retrofit R-22 to PuronR Installation Unit Damage Hazard Unit MchxRtpf 38AUZ*25 38AUD*25 Compressor Unit Size 38AURefrigerant TYPE‡ Condenser Fans Rtpf Shipping Charge kg Pressurestat Settings kPa High CutoutNominal Capacity kW Scroll Rtpf Shipping Charge A/B lb Oil Charge A/B ozFace Area sq ft total Rows/Fins per inch FPI Oil Charge A/B L Operating Weight kg Novation Coil Al TubeRtpf Shipping Charge A/B kg Qty...r/s Motor Hp Nema Diameter mm U Z a 2 5 a 0 G 6 a 0 a 0 a Jobsite Survey InstallationMatching 38AU Model To Evaporator Coil Do not Bury Refrigeration Lines Equivalent Lengths for Common Fittings ft Provide Safety ReliefSlab Mount Check 38AU Model with Evaporator Coil Connections Liquid Lift Suction Riser38AUZ 16-25 Piping Recommendations Single-Circuit Unit Insulate Suction Lines 38AUD 16-25 Piping Recommendations Two-Circuit UnitVertical Separation outdoor unit above indoor unit Hot Gas Bypass Install Filter Driers and Moisture Indicators Refrigerant Specialties Part Numbers Selecting an Accumulator Install Liquid Line Solenoid ValveCapacity Control Liquid Line Solenoid Valve Make Piping Connections Evacuation/Dehydration Preliminary Charge Fire Hazard Field Power SupplyUnits with Factory-Installed Disconnect All Units Convenience Outlets Electrical Operation Hazard Field Control Wiring Convenience Outlet Utilization Notice Label Control Transformer Wiring Thermostat Unit Wire/Fuse or Hacr Breaker Sizing Data Unbalanced 3-Phase Supply Voltage System Check PRE-START-UPSTART-UP Preliminary Checks Using plotted operating point Advanced Scroll Temperature Protection AstpAdjust Refrigerant Charge Start Unit 38AUZ*25 Check Compressor Oil Level Final Checks 38AUD*16 Charging Chart Novation 38AUZ*16 Charging Chart Rtpf 38AUD*16 Charging Chart Rtpf 38AUD*25 Charging Chart Rtpf Typical 38AUZ Wiring Diagram 15 Ton 230V Tandem Unit Shown Typical 38AUD Wiring Diagram 15 Ton 230V Dual Unit Shown Operating Sequence Base Unit Controls Refrigeration System Routine System MaintenanceService Equipment Damage Hazard Field Refrigerant Access Ports Factory High-Flow Access PortsLiquid Line Filter Drier Comfort Alert Diagnostic Module Input Terminal Voltage LED Status Codes Lockout Compressor Protection 38AUD Size 16 Cabinet LPS 38AUZ,D Size 25 Cabinet 38AUZ*25 Compressor Assembly Rear View Coil Type Identification Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks NOVATIONt Type Routine Cleaning of Round-Tube Plate Fin Rtpf Coils Replacing NOVATIONt Condenser CoilUnit Reliability Hazard Compressor Stops on HIGH-PRESSURE Switch TroubleshootingProblem Solution Compressor does not RUN Fastener Torque Values Unit Operates TOO Long or Continuously Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient System is Noisy Wiring Diagram List Appendix aAppendix B Appendix C Low Ambient Option Factory InstalledTroubleshooting Operation Motormaster Sensor Location 38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 Rtpf Wind Baffle Dimension Dimensions --- Inches Unit BaffleDimensions --- MM Unit Baffle Wind Baffles Fabrication 15 Ton Wind Baffle Brackets Fabrication Front Front Back Left Right Catalog No 38AU---09SI START-UP Checklist II. PRE-START-UP Outdoor Unit Check Voltage Imbalance