Carrier appendix 38AUZ*25 Check Compressor Oil Level, Final Checks

Carrier appendix Liquid Lift, Suction Riser, 38AUZ 16-25 Piping Recommendations Single-Circuit Unit Carrier appendix 38AUD 16-25 Piping Recommendations Two-Circuit Unit, Vertical Separation outdoor unit above indoor unit Carrier 38AU appendix Install Filter Driers and Moisture Indicators, Refrigerant Specialties Part Numbers Carrier 38AU Install Liquid Line Solenoid Valve, Capacity Control Liquid Line Solenoid Valve, Selecting an Accumulator Carrier 38AU appendix Evacuation/Dehydration, Preliminary Charge Carrier 38AU appendix Field Power Supply, Fire Hazard, Units with Factory-Installed Disconnect, All Units Carrier 38AU appendix Convenience Outlets, Electrical Operation Hazard Carrier 38AU appendix Convenience Outlet Utilization Notice Label, Field Control Wiring Carrier 38AU appendix Thermostat, Control Transformer Wiring Carrier 38AU appendix Unit Wire/Fuse or Hacr Breaker Sizing Data, Unbalanced 3-Phase Supply Voltage Carrier 38AU appendix Pre-Start-Up, System Check, Preliminary Checks Carrier 38AU Start Unit, Compressor Overload, Advanced Scroll Temperature Protection Astp, Adjust Refrigerant Charge Carrier appendix 38AUZ*25 Check Compressor Oil Level, Final Checks Carrier appendix 38AUD*16 Charging Chart Novation Carrier appendix 38AUZ*16 Charging Chart Rtpf Carrier appendix 38AUD*16 Charging Chart Rtpf Carrier appendix 38AUD*25 Charging Chart Rtpf Carrier appendix Typical 38AUZ Wiring Diagram 15 Ton 230V Tandem Unit Shown Carrier appendix Typical 38AUD Wiring Diagram 15 Ton 230V Dual Unit Shown Carrier 38AU appendix Operating Sequence, Base Unit Controls Carrier 38AU appendix Routine System Maintenance, Service, Refrigeration System, Equipment Damage Hazard Carrier 38AU appendix Liquid Line Filter Drier, Field Refrigerant Access Ports, Factory High-Flow Access Ports Carrier 38AU appendix Comfort Alert Diagnostic Module, Input Terminal Voltage Carrier 38AU appendix LED Status Codes, Lockout Carrier 38AU appendix Compressor Protection Carrier appendix 38AUD Size 16 Cabinet Carrier 38AU appendix Lps Carrier appendix 38AUZ,D Size 25 Cabinet Carrier appendix 38AUZ*25 Compressor Assembly Rear View Carrier 38AU appendix Coil Type Identification, NOVATIONt Type, Round-Tube Plate-Fin Rtpf Type Carrier 38AU appendix Replacing NOVATIONt Condenser Coil, Routine Cleaning of Round-Tube Plate Fin Rtpf Coils Carrier 38AU appendix Fastener Torque Values, Troubleshooting, Problem Solution Compressor does not RUN Carrier 38AU Problem Solution Compressor Cycles on LOW-PRESSURE Switch, Compressor Running but Cooling Insufficient Carrier 38AU appendix Appendix a, Appendix B, Wiring Diagram List Carrier 38AU Appendix C, Low Ambient Option Factory Installed, Operation, Troubleshooting, Speed Control Sensor Resistance Carrier appendix Motormaster Sensor Location, 38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 Rtpf
Page 25

38AUZ*25 Check Compressor Oil Level —

After adjusting the refrigerant charge, allow the unit to run fully loaded for 20 minutes. Stop the compressors and check the oil level. Oil level should be 1/3 to 1/2 up on the sight glass (see Fig. 22).

1/2 (MAX)

1/3 (MIN)

C01377

Fig. 22 - Recommended Oil Level — 38AUZ*25

IMPORTANT: Oil level should only be checked when the compressors are off.

Add oil only if necessary to bring the oil into view in the sight glass. If oil is added, run the circuit for an additional 10 minutes, then stop and check oil level. If the level remains low, check the piping system for proper design for oil return; also, check the system for leaks. If checking the oil level with unit running in part load, let unit run one hour, then run at full load for 10 minutes. If oil does not return to acceptable sight glass levels, check for correct suction piping and line sizing.

Final Checks —

Ensure that all safety controls are operating, control panel covers are on, and the service panels are in place.

38AU

C10945

Fig. 23 - 38AUZ*16 Charging Chart (Novation)

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Contents Contents Installation, Start---Up Service InstructionsInstallation Guideline Safety ConsiderationsReplacement/Retrofit R-22 to PuronR Unit Damage Hazard InstallationMchx UnitRtpf 38AUD*25 38AUZ*25Refrigerant TYPE‡ Unit Size 38AUCompressor Condenser FansNominal Capacity kW Pressurestat Settings kPa High CutoutRtpf Shipping Charge kg ScrollOil Charge A/B oz Rtpf Shipping Charge A/B lbFace Area sq ft total Rows/Fins per inch FPI Rtpf Shipping Charge A/B kg Operating Weight kg Novation Coil Al TubeOil Charge A/B L Qty...r/s Motor Hp Nema Diameter mmU Z a 2 5 a 0 G 6 a 0 a 0 a Matching 38AU Model To Evaporator Coil InstallationJobsite Survey Do not Bury Refrigeration LinesSlab Mount Provide Safety ReliefEquivalent Lengths for Common Fittings ft Check 38AU Model with Evaporator Coil ConnectionsSuction Riser Liquid Lift38AUZ 16-25 Piping Recommendations Single-Circuit Unit Vertical Separation outdoor unit above indoor unit 38AUD 16-25 Piping Recommendations Two-Circuit UnitInsulate Suction Lines Hot Gas BypassRefrigerant Specialties Part Numbers Install Filter Driers and Moisture IndicatorsCapacity Control Liquid Line Solenoid Valve Install Liquid Line Solenoid ValveSelecting an Accumulator Make Piping ConnectionsPreliminary Charge Evacuation/DehydrationUnits with Factory-Installed Disconnect Field Power SupplyFire Hazard All UnitsElectrical Operation Hazard Convenience OutletsConvenience Outlet Utilization Notice Label Field Control WiringThermostat Control Transformer WiringUnbalanced 3-Phase Supply Voltage Unit Wire/Fuse or Hacr Breaker Sizing DataSTART-UP PRE-START-UPSystem Check Preliminary ChecksAdjust Refrigerant Charge Advanced Scroll Temperature Protection AstpUsing plotted operating point Start UnitFinal Checks 38AUZ*25 Check Compressor Oil Level38AUD*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 SequenceService Routine System MaintenanceRefrigeration System Equipment Damage HazardFactory High-Flow Access Ports Field Refrigerant Access PortsLiquid Line Filter Drier Input Terminal Voltage Comfort Alert Diagnostic ModuleLockout LED Status CodesCompressor Protection 38AUD Size 16 Cabinet LPS 38AUZ,D Size 25 Cabinet 38AUZ*25 Compressor Assembly Rear View Repairing Novation Condenser Tube Leaks Novation Coil Cleaning and MaintenanceCoil Type Identification NOVATIONt TypeReplacing NOVATIONt Condenser Coil Routine Cleaning of Round-Tube Plate Fin Rtpf CoilsUnit Reliability Hazard Problem Solution Compressor does not RUN TroubleshootingCompressor Stops on HIGH-PRESSURE Switch Fastener Torque ValuesCompressor Running but Cooling Insufficient Problem Solution Compressor Cycles on LOW-PRESSURE SwitchUnit Operates TOO Long or Continuously System is NoisyAppendix a Wiring Diagram ListAppendix B Troubleshooting Low Ambient Option Factory InstalledAppendix C Operation38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 Rtpf Motormaster Sensor LocationDimensions --- Inches Unit Baffle Wind Baffle DimensionDimensions --- 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 ChecklistCheck Voltage Imbalance
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