Carrier Complete Guide to 38AU Air Conditioner Models: 38AUD and 38AUZ

Page 40

38AU

Condenser Fans/Motors

Access Panel -

Control Box &

Compressors

Service

Valves

C10089

Fig. 38 - 38AUZ,D Size 25 Cabinet

CKT

2

HPS

LPS

CKT

2

HPS

CKT

1

CKT

1

LPS

C10090

Fig. 39 - 38AUD*25 Piping

40

Image 40

Contents Installation, Start---Up Service Instructions ContentsInstallation Guideline Safety ConsiderationsReplacement/Retrofit R-22 to PuronR Installation Unit Damage HazardMchx UnitRtpf 38AUZ*25 38AUD*25Unit Size 38AU Refrigerant TYPE‡Compressor Condenser FansPressurestat Settings kPa High Cutout Nominal Capacity kWRtpf Shipping Charge kg ScrollOil Charge A/B oz Rtpf Shipping Charge A/B lbFace Area sq ft total Rows/Fins per inch FPI Operating Weight kg Novation Coil Al Tube Rtpf Shipping Charge A/B kgOil 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 Installation Matching 38AU Model To Evaporator CoilJobsite Survey Do not Bury Refrigeration LinesProvide Safety Relief Slab MountEquivalent Lengths for Common Fittings ft Check 38AU Model with Evaporator Coil ConnectionsSuction Riser Liquid Lift38AUZ 16-25 Piping Recommendations Single-Circuit Unit 38AUD 16-25 Piping Recommendations Two-Circuit Unit Vertical Separation outdoor unit above indoor unitInsulate Suction Lines Hot Gas BypassInstall Filter Driers and Moisture Indicators Refrigerant Specialties Part NumbersInstall Liquid Line Solenoid Valve Capacity Control Liquid Line Solenoid ValveSelecting an Accumulator Make Piping ConnectionsEvacuation/Dehydration Preliminary ChargeField Power Supply Units with Factory-Installed DisconnectFire Hazard All UnitsConvenience Outlets Electrical Operation HazardField Control Wiring Convenience Outlet Utilization Notice LabelControl Transformer Wiring ThermostatUnit Wire/Fuse or Hacr Breaker Sizing Data Unbalanced 3-Phase Supply VoltagePRE-START-UP START-UPSystem Check Preliminary ChecksAdvanced Scroll Temperature Protection Astp Adjust Refrigerant ChargeUsing plotted operating point Start Unit38AUZ*25 Check Compressor Oil Level Final Checks38AUD*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 ControlsRoutine System Maintenance ServiceRefrigeration System Equipment Damage HazardFactory High-Flow Access Ports Field Refrigerant Access PortsLiquid Line Filter Drier Comfort Alert Diagnostic Module Input Terminal VoltageLED Status Codes LockoutCompressor Protection 38AUD Size 16 Cabinet LPS 38AUZ,D Size 25 Cabinet 38AUZ*25 Compressor Assembly Rear View Novation Coil Cleaning and Maintenance Repairing Novation Condenser Tube LeaksCoil Type Identification NOVATIONt TypeReplacing NOVATIONt Condenser Coil Routine Cleaning of Round-Tube Plate Fin Rtpf CoilsUnit Reliability Hazard Troubleshooting Problem Solution Compressor does not RUNCompressor Stops on HIGH-PRESSURE Switch Fastener Torque ValuesProblem Solution Compressor Cycles on LOW-PRESSURE Switch Compressor Running but Cooling InsufficientUnit Operates TOO Long or Continuously System is NoisyAppendix a Wiring Diagram ListAppendix B Low Ambient Option Factory Installed TroubleshootingAppendix C OperationMotormaster Sensor Location 38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 RtpfDimensions --- 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 START-UP Checklist II. PRE-START-UP Outdoor UnitCheck Voltage Imbalance