Lps | Carrier 38AU guide

Equalization

LPS

Oil Equalizer Line

38AU

C10079

Fig. 36 - 38AUZ*16 Compressor Assembly (Rear View)

C10214

Fig. 37 - 38AUD*16 Compressor Assembly (Rear View)

39

Image 39

Carrier 38AU appendix Lps

Contents

Contents Installation, Start---Up Service Instructions Safety Considerations Installation GuidelineReplacement/Retrofit R-22 to PuronR Unit Damage Hazard Installation Unit MchxRtpf 38AUD*25 38AUZ*25 Condenser Fans Unit Size 38AURefrigerant TYPE‡ Compressor Scroll Pressurestat Settings kPa High CutoutNominal Capacity kW Rtpf Shipping Charge kg Rtpf Shipping Charge A/B lb Oil Charge A/B ozFace Area sq ft total Rows/Fins per inch FPI Qty...r/s Motor Hp Nema Diameter mm Operating Weight kg Novation Coil Al TubeRtpf Shipping Charge A/B kg Oil Charge A/B L U Z a 2 5 a 0 G 6 a 0 a 0 a Do not Bury Refrigeration Lines InstallationMatching 38AU Model To Evaporator Coil Jobsite Survey Check 38AU Model with Evaporator Coil Connections Provide Safety ReliefSlab Mount Equivalent Lengths for Common Fittings ft Liquid Lift Suction Riser38AUZ 16-25 Piping Recommendations Single-Circuit Unit Hot Gas Bypass 38AUD 16-25 Piping Recommendations Two-Circuit UnitVertical Separation outdoor unit above indoor unit Insulate Suction Lines Refrigerant Specialties Part Numbers Install Filter Driers and Moisture Indicators Make Piping Connections Install Liquid Line Solenoid ValveCapacity Control Liquid Line Solenoid Valve Selecting an Accumulator Preliminary Charge Evacuation/Dehydration All Units Field Power SupplyUnits with Factory-Installed Disconnect Fire Hazard Electrical Operation Hazard Convenience Outlets Convenience Outlet Utilization Notice Label Field Control Wiring Thermostat Control Transformer Wiring Unbalanced 3-Phase Supply Voltage Unit Wire/Fuse or Hacr Breaker Sizing Data Preliminary Checks PRE-START-UPSTART-UP System Check Start Unit Advanced Scroll Temperature Protection AstpAdjust Refrigerant Charge Using plotted operating point Final Checks 38AUZ*25 Check Compressor Oil Level 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 Base Unit Controls Operating Sequence Equipment Damage Hazard Routine System MaintenanceService Refrigeration System Field Refrigerant Access Ports Factory High-Flow Access PortsLiquid Line Filter Drier Input Terminal Voltage Comfort Alert Diagnostic Module Lockout LED Status Codes Compressor Protection 38AUD Size 16 Cabinet LPS 38AUZ,D Size 25 Cabinet 38AUZ*25 Compressor Assembly Rear View NOVATIONt Type Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Coil Type Identification Routine Cleaning of Round-Tube Plate Fin Rtpf Coils Replacing NOVATIONt Condenser CoilUnit Reliability Hazard Fastener Torque Values TroubleshootingProblem Solution Compressor does not RUN Compressor Stops on HIGH-PRESSURE Switch System is Noisy Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient Unit Operates TOO Long or Continuously Wiring Diagram List Appendix aAppendix B Operation Low Ambient Option Factory InstalledTroubleshooting Appendix C 38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 Rtpf Motormaster Sensor Location 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 II. PRE-START-UP Outdoor Unit START-UP Checklist Check Voltage Imbalance