Carrier 38AUQ appendix Installation Guideline, Replacement /Retrofit R22 to Puron

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ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lockout tag. Unit may have more than one power switch.

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puron® (R-410A) refrigerant systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment.

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing 38AUQ units.

INSTALLATION GUIDELINE

Replacement /Retrofit – R22 to Puron®

Split system heat pumps are intended to be installed with matching indoor sections only. The 38AUQ heat pump outdoor units are matched only with same-size 40RUQ indoor sections. Existing R-22 indoor coils cannot be converted to R-410A heat pump duty. Only the existing refrigerant piping is a candidate for retrofit use.

Acid test – If the existing system is being replaced because of a compressor electrical failure, assume acid is in system. If system is being replaced for any other reason, use an approved acid test kit to determine acid level. If even low levels of acid are detected, install a 100 percent activated alumina suction line filter drier in addition to the replacement liquid-line filter drier. Operate this system in COOLING ONLY. Remove the suction line filter drier as soon as possible, with a maximum of 72 hr of operation.

Recommendation: Install a ball valve in the liquid line at the filter drier location when installing a suction filter in the suction line.

Installation –

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

2.Drain oil from low points and traps in suction line tubing if they were not replaced.

3.Remove the existing outdoor unit. Install the new outdoor unit according to these installation instructions.

4.Install the factory-supplied liquid-line filter drier at the in- door coil just upstream of the TXV.

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 Puron® system.

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

6.Evacuate and charge the system according to the instruc- tions in this installation manual.

7.Operate the system for 10 hr. Monitor the pressure drop across the suction line filter drier. If pressure drop ex- ceeds 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 necessary. Never leave suction- line filter drier in system longer than 72 hr (actual time).

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Contents Contents Safety ConsiderationsInstallation Installation GuidelineReplacement /Retrofit R22 to Puron 38AUQ*07-12 Unit Dimensions Shipping Charge lb Pressurestat Settings psig High CutoutOperating Charge, Typical lb† Qty...TypeNominal Capacity kW Operating Weight kg Aluminum-Fin CoilsPressurestat Settings kPa High Cutout Operating Charge, Typical kg†Type of Coil Service OptionsModel Type Refrigerant OptionsInstallation Puron-duty Filter Driers 38AUQ*07-12 Piping Recommendations Single-Circuit UnitMaximum Vertical Separation Refrigerant Specialties Part Numbers Insulation for Vapor Line Exposed To Outdoor ConditionsComplete Electrical Connections Install AccessoriesField Power Supply Convenience Outlets Units Without Factory-Installed DisconnectUnits with Factory-Installed Disconnect All unitsInstalling Weatherproof Cover Convenience Outlet LocationField Control Wiring ThermostatElectrical Data 38AUQ*07-12 Hz Units PRE-START-UP START-UPStart Unit Advanced Scroll Temperature Protection AstpAdjust Refrigerant Charge Final Checks38AUQ*07 Charging Chart 38AUQ Wiring Diagram 208/230-3-60 shown Operating Sequence Base Unit ControlsQuarterly Inspection 30 days after initial start Routine System MaintenanceService Refrigeration SystemLiquid Line Filter Drier Field Refrigerant Access PortsRefrigerant System Pressure Access Ports Outdoor Coil Metering DevicesCrankcase Heater Heat Pump ControlsCompressor Protection Commercial Defrost ControlReversing valve control Dip Switch PositionDefrost Compressor controlDefrost Speedup Functions Indoor Fan Off DelayDefrost Thermostats Fans Service Valves 38AUQ*08 Exterior 38AUQ*12 Exterior Comfort Alert Diagnostic Module InputLED Status Codes LockoutRoutine Cleaning of Indoor Coil Surfaces Outdoor Coil Maintenance and Cleaning RecommendationPeriodic Clean Water Rinse LubricationTorque Values Service PartsFastener Torque Values Troubleshooting Appendix a Appendix BAppendix C Catalog No 38AUQ-01SIPreliminary Information CUT Along Dotted Linecut Along Dotted Line

38AUQ specifications

The Carrier 38AUQ is a versatile and efficient air conditioning unit designed to meet a variety of residential and light commercial cooling needs. Known for its advanced technology and robust performance, the 38AUQ model showcases Carrier's commitment to sustainability and energy efficiency.

One of the standout features of the Carrier 38AUQ is its use of variable-speed inverter technology. This allows the unit to adjust its cooling output in response to the temperature demands of the environment. By operating at multiple speed levels, it minimizes energy consumption and maximizes comfort, ensuring a consistent, quiet cooling experience.

The 38AUQ is equipped with a high-efficiency compressor, which helps to further enhance its energy performance. This component plays a critical role in ensuring that the unit operates smoothly, reducing both electricity bills and the environmental impact. Efficiency ratings often exceed industry standards, making the 38AUQ a suitable choice for those looking to reduce their carbon footprint while enjoying a comfortable indoor climate.

In terms of design, the Carrier 38AUQ boasts a compact and sleek profile that allows for easy installation in a variety of settings. Its durable construction is built to withstand harsh weather conditions, ensuring longevity and reliability. Additionally, an advanced air purification system is integrated, featuring filters that capture airborne particles, improving indoor air quality.

The unit also offers a range of smart features, including compatibility with smart home systems. Users can remotely control their air conditioning via smartphone apps, allowing for customizable settings and energy management from anywhere. This connectivity aligns with modern living preferences, enhancing convenience and control.

Furthermore, the Carrier 38AUQ is designed with noise reduction in mind. The advanced sound-absorbing materials and quiet operation of its fan and compressor make it one of the quieter air conditioning options on the market. This is particularly beneficial for residential applications, where noise can be a significant concern.

Overall, the Carrier 38AUQ combines cutting-edge technology, energy efficiency, and user-friendly features, making it a top choice for both homeowners and small business operators seeking reliable cooling solutions. Its commitment to performance and efficiency makes it a standout model in the Carrier air conditioning lineup.
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