Carrier 38AU Install Filter Driers and Moisture Indicators, Refrigerant Specialties Part Numbers

Carrier 38AU appendix Installation, Unit Damage Hazard Carrier 38AU appendix Unit, Mchx, Rtpf Carrier appendix 38AUZ*25, 38AUD*25 Carrier Unit Size 38AU, Refrigerant TYPE‡, Compressor, Condenser Fans, Rtpf Condenser Coil, Novation Condenser Coil Carrier 38AU appendix Nominal Capacity kW, Rtpf Shipping Charge kg, Scroll, Oil Charge L, Rows/Fins per Meter Fins/m Carrier 38AU appendix Rtpf Shipping Charge A/B lb, Oil Charge A/B oz, Face Area sq ft total Rows/Fins per inch FPI Carrier 38AU appendix Operating Weight kg Novation Coil Al Tube, Rtpf Shipping Charge A/B kg, Oil Charge A/B L Carrier 38AU appendix U Z a 2 5 a 0 G 6 a 0 a 0 a Carrier appendix Installation, Matching 38AU Model To Evaporator Coil, Jobsite Survey, Do not Bury Refrigeration Lines Carrier 38AU appendix Slab Mount, Equivalent Lengths for Common Fittings ft, Provide Safety Relief 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
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CKT

2

CKT

1

CKT

2

CKT

1

Circuit 2

Connections

Circuit 1

Connections

C10355

Fig. 6 - 38AUD Service Valve Locations

Plan the Circuit 1 and Circuit 2 tubing segments carefully, mark each segment and check constantly as piping systems are assembled to avoid piping errors.

38AUD unit cannot be field-piped as a single-circuit/tandem system.

Connecting 40RU to 38AUD: The 40RU fan coil in sizes 16, 25 and 28 is a face-split coil design that also has its circuits designated as 1 and 2. See Fig. 7. Note that the lower coil segment changes as the arrangement of the 40RU changes. In a vertical arrangement, the 40RU’s lower coil segment is segment 2; this segment should be connected to the 38AUD’s Circuit 1. In a horizontal arrangement, the 40RU’s lower segment is now segment 1; this segment should be connected to the 38AUD’s Circuit 1.

Note that refrigerant suction piping should be insulated.

40RU

Cooling

40RU Coil

Connect to

Arrangement

Stage

Segment

38AUD

 

 

 

 

Vertical

Y1

2

Circuit 1

Y2

1

Circuit 2

 

 

 

 

 

Horizontal

Y1

1

Circuit 1

Y2

2

Circuit 2

 

 

 

 

 

Install Filter Drier(s) and Moisture Indicator(s) —

Every unit MUST have a filter drier in the liquid line. 38AUD models require two filter driers (one in each liquid line). Locate the filter drier(s) at the indoor unit, close to the evaporator coil’s thermal expansion valve (TXV) inlets.

38AU units include one (38AUZ) or two (38AUD) Puron-duty filter drier(s), shipped in cartons attached to the unit basepan. Remove the filter drier(s) and prepare to install in the liquid line(s) at the evaporator coil. Do not remove connection fitting plugs until ready to connect and braze the filter drier into the liquid line position.

1

2

FIRST ON/LAST OFF = 2

VERTICAL INSTALLATION

2

1

FIRST ON/LAST OFF = 1

HORIZONTAL INSTALLATION

C10071

Fig. 7 - Typical Evaporator Coil Connections (40RU)

Table 8 –

Puron-duty Filter Drier(s)

 

 

 

 

 

Model-Size

Qty

Liquid

Desiccant

Part

Line OD

Volume

Number Ref

 

 

38AUZ*16

1

5/8-in

30 cu. in.

KH43LG087

38AUZ*25

1

5/8-in

30 cu. in.

KH43LG087

38AUD*16

2

1/2-in

16 cu. in.

KH43LG085

38AUD*25

2

1/2-in

16 cu. in.

KH43LG085

Installation of liquid line moisture indicating sightglass in each circuit is recommended. Locate the sightglass(es) between the outlet of the filter drier and the TXV inlet.

Refer to Table 9 for recommendations on refrigeration specialties.

38AU

Table 9 – Refrigerant Specialties Part Numbers.

LIQUID LINE

LIQUID LINE

LLSV

SIGHT

FILTER

SIZE (in.)

SOLENOID VALVE (LLSV)

COIL

GLASS

DRIER

 

 

 

 

 

 

1/

2

EF680035

EF680037

KM680004

provided with unit

 

 

 

 

 

5/8

EF680036

EF680037

KM680005

see Table 8

38AUD units require TWO sets of parts.

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Contents Contents Installation, Start---Up Service InstructionsSafety Considerations Installation GuidelineReplacement/Retrofit R-22 to PuronR Unit Damage Hazard InstallationUnit MchxRtpf 38AUD*25 38AUZ*25Condenser Fans Unit Size 38AURefrigerant TYPE‡ CompressorScroll Pressurestat Settings kPa High CutoutNominal Capacity kW Rtpf Shipping Charge kgRtpf 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 LU 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 SurveyCheck 38AU Model with Evaporator Coil Connections Provide Safety ReliefSlab Mount Equivalent Lengths for Common Fittings ftLiquid 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 LinesRefrigerant Specialties Part Numbers Install Filter Driers and Moisture IndicatorsMake Piping Connections Install Liquid Line Solenoid ValveCapacity Control Liquid Line Solenoid Valve Selecting an AccumulatorPreliminary Charge Evacuation/DehydrationAll Units Field Power SupplyUnits with Factory-Installed Disconnect Fire HazardElectrical 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 DataPreliminary Checks PRE-START-UPSTART-UP System CheckStart Unit Advanced Scroll Temperature Protection AstpAdjust Refrigerant Charge Using plotted operating pointFinal 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 SequenceEquipment Damage Hazard Routine System MaintenanceService Refrigeration SystemField Refrigerant Access Ports Factory High-Flow 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 NOVATIONt Type Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Coil Type IdentificationRoutine 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 SwitchSystem is Noisy Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient Unit Operates TOO Long or ContinuouslyWiring Diagram List Appendix aAppendix B Operation Low Ambient Option Factory InstalledTroubleshooting Appendix C38AUZ*16 & 38AUD*16 Novation 38AUZ*16/25 & 38AUD*16/25 Rtpf Motormaster Sensor LocationWind 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 ChecklistCheck Voltage Imbalance
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