Carrier 38AU appendix Replacing NOVATIONt Condenser Coil, Unit Reliability Hazard

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 Carrier 38AU appendix Wind Baffle Dimension, Dimensions --- Inches Unit Baffle, Dimensions --- MM Unit Baffle Carrier 38AU appendix Wind Baffles Fabrication Carrier 38AU appendix Ton Wind Baffle Brackets Fabrication Carrier 38AU appendix Front Carrier 38AU appendix Front Back Left Right Carrier appendix Catalog No 38AU---09SI Carrier 38AU appendix START-UP Checklist, II. PRE-START-UP Outdoor Unit Carrier 38AU appendix Check Voltage Imbalance
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oxyacetylene fuel and torch. While the flame temperature for MAPP is lower than that of oxyacetylene (and thus provides more flexibility when working on aluminum), the flame temperature is still higher than the melting temperature of aluminum, so user caution is required. Follow instructions carefully. Use the heat shield.

Replacing NOVATIONt Condenser Coil —

The service replacement coil is preformed and is equipped with transition joints with copper stub tubes. When brazing the connection joints to the unit tubing, use a wet cloth around the aluminum tube at the transition joint. Avoid applying torch flame directly onto the aluminum tubing.

Routine Cleaning of Round-Tube Plate Fin (RTPF) Coils —

Periodic cleaning with Totaline→ environmentally sound coil cleaner is essential to extend the life of RTPF coils. This cleaner is available from Carrier Replacement parts division as part number P902-0301 for a one gallon container, and part number P902-0305 for a 5 gallon container. It is recommended that all RTPF coils be cleaned with the Totaline environmentally sound coil cleaner as described below.

NOTE: Do NOT use Totaline→ environmentally sound coil cleaner, or any other coil cleaner on NOVATION coils. See “NOVATION Coil Cleaning and Maintenance” for instructions on cleaning NOVATION coils.

Coil cleaning should be part of the unit’s regularly scheduled maintenance procedures to ensure long life of the coil. Failure to clean the coils may result in reduced durability in the environment.

Avoid the use of: S coil brighteners

S acid cleaning prior to painting S high pressure washers

S poor quality water for cleaning

Totaline environmentally sound coil cleaner is non-flammable, hypoallergenic, non-bacterial, and a USDA accepted biodegradable agent that will not harm the coil or surrounding components such as electrical wiring, painted metal surfaces, or insulation. Use of non-recommended coil cleaners is strongly discouraged since coil and unit durability could be affected.

Totaline Environmentally Sound Coil Cleaner Application Equipment —

S21/2 gallon garden sprayer

S water rinse with low velocity spray nozzle

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in corrosion and damage to the unit.

Harsh chemicals, household bleach or acid or basic cleaners should not be used to clean outdoor or indoor coils or any kind. These cleaners can be very difficult to rinse out of the coil and can accelerate corrosion at the fin/tube interface where dissimilar materials are in contact. If there is dirt below the surface of the coil use the Totaline environmentally sound coil cleaner as described above.

!CAUTION

UNIT RELIABILITY HAZARD

Failure to follow this caution may result in reduced unit performance.

High velocity water from a pressure washer, garden hose, or compressed air should never be used to clean a coil. The force of the water or air jet will bend the fin edges and increase airside pressure drop.

Totaline Environmentally Sound Coil Cleaner Application Instructions:

NOTE: Proper eye protection such as safety glasses is recommended during mixing and application.

1.Turn off unit power.

2.Remove screws holding rear corner post and top cover in place. Pivot top cover up 12 to 18 inches (305 to 457 mm) and support with a rigid support. See Fig. 43.

3.Remove all surface loaded fibers and dirt with a vacu- um cleaner. If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges can be easily bent over and damage to the coating of a protected coil) if the tool is applied across the fins.

NOTE: Use of a water stream, such as a garden hose, against surface loaded coil will drive the fibers and dirt into the coil, making cleaning efforts more difficult. Surface loaded fibers must be completely removed prior to using low velocity clean water rinse.

4.Using a low velocity garden hose thoroughly wet finned surfaces with clean water. Be careful not to bend the fins.

5.Mix Totaline environmentally sound coil cleaner in a 21/2 gallon garden sprayer according to the instruc- tions included with the cleaner. The optimum solution temperature is 100°F (38°C).

NOTE: Do NOT USE water in excess of 130°F (54°C), as the enzymatic activity will be destroyed.

6.Thoroughly apply Totaline→ environmentally sound coil cleaner solution to all coil surfaces including the finned area, tube sheets and coil headers.

38AU

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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*25Condenser Fans Unit Size 38AURefrigerant TYPE‡ CompressorScroll Pressurestat Settings kPa High CutoutNominal Capacity kW Rtpf Shipping Charge kgOil Charge A/B oz Rtpf Shipping Charge A/B lbFace 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 ftSuction Riser Liquid Lift38AUZ 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 SystemFactory 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 NOVATIONt Type Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Coil Type IdentificationReplacing NOVATIONt Condenser Coil Routine Cleaning of Round-Tube Plate Fin Rtpf CoilsUnit 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 ContinuouslyAppendix a Wiring Diagram ListAppendix B Operation Low Ambient Option Factory InstalledTroubleshooting Appendix C38AUZ*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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