Carrier 38AU appendix Installation, Unit Damage Hazard

Carrier 38AU appendix Installation, Start---Up Service Instructions, Contents Carrier 38AU appendix Safety Considerations, Installation Guideline, Replacement/Retrofit R-22 to PuronR 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
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Same tube sizes are capable of handling higher flowrates (expressed as tons of cooling capacity) with Puron refrigerant compared to R-22 at constant pressure drops. For example, a 1/2-inch OD liquid line is rated at 33% higher tons with PuronR than with R-22 (at 5_F pressure drop). A 1 1/8-inch OD suction line is rated at 53% higher tons with Puron than with R-22 (at 2_F pressure drop). Refrigeration lines selected for R-22 use are typically oversized for Puron applications. Carefully check the existing suction line size against the table for maximum size (see Table 7); replace vertical riser segments if necessary. Check existing liquid line size against sizing data in Table 5 or 6; replace with smaller lines when feasible.

Installation –

1.Remove the existing evaporator coil or fan coil and install the replacement coil when appropriate.

2.Drain oil from low points and traps in suction line tubing (and hot gas bypass tubing if appropriate) and evaporator if they were not replaced. Removing oil from evaporator coil may require purging of the tubing with dry nitrogen.

3.Unless indoor unit is equipped with a Puron→ ap- proved metering device, change the metering device to a thermal expansion valve (TXV) designed for PuronR (R-410A).

4.Remove the existing outdoor unit. Install the new out- door unit according to these installation instructions.

5.Install a new field-supplied liquid-line filter drier at the indoor coil just upstream of the TXV or fix orifice metering device.

6.If a suction line filter drier is also to be installed, in- stall suction line drier downstream of suction line ser- vice valve at condensing unit.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Never install suction-line filter drier in the liquid-line of a PuronR system.

7.If required, install a 100% activated alumina suction line filter drier at the outdoor unit.

8.Evacuate and charge the system according to the in- structions in this installation manual.

9.Operate the system for 10 hr. Monitor the pressure drop across the suction line filter drier. If pressure drop exceeds 3 psig (21kPa), replace suction-line and liquid-line filter driers. Be sure to purge system with dry nitrogen and evacuate when replacing filter driers. Continue to monitor the pressure drop across suction-line filter drier. Repeat filter changes is neces- sary. Never leave suction-line filter drier in system longer than 72 hr (actual time).

38AU

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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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