Carrier Official Installation Manual and Safety Guidelines for Air Conditioner Models
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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 38AU units.

INSTALLATION GUIDELINE

Replacement /Retrofit – R22 to Puron®

Replacement/retrofit installations require change-out of outdoor unit, metering device, and filter driers. Change-out of indoor coil (evaporator) and interconnecting tubing is recommended.

Existing evaporator coil – If the existing evaporator coil may be re-used, check with the coil manufacturer to verify the coil construction is suitable for operation with the higher pressures of Puron® (R-410A). Also determine if the existing TXV valve is compatible with R-410A, replace if necessary. The minimum factory test pressure rating must be 250 psig (1725 kPa). Existing coil will need to be purged with Nitrogen to remove as much mineral oil as possible to eliminate cross contamination of oils.

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. 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 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® approved metering device, change the metering device to a thermal expansion valve (TXV) designed for Puron® (R-410A).

4.Remove the existing outdoor unit. Install the new outdoor 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, install suction line drier downstream of suction line service valve at condensing unit.

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.

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 instructions 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 necessary. Never leave suction-line filter drier in system longer than 72 hr (actual time).

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Contents Contents Safety ConsiderationsInstallation Guideline Replacement /Retrofit R22 to Puron38AUZ*07-14 Unit Dimensions Compressor Unit Size 38AURefrigerant Type Condenser FansNominal Capacity kW Operating Weight kg Aluminum-Fin Coils StandardPressurestat Settings kPa High Cutout Operating Charge, Typical kg† Shipping Charge kgType of Coil Service OptionsModel Type Refrigerant OptionsInstallation Liquid Line Data 38AUZ*07-14 60 Hz Units Refrigerant Piping Sizes 38AUZ*07-14 60 Hz UnitsComplete Electrical Connections Install AccessoriesField Power Supply Refrigerant Specialities Part NumbersConvenience Outlets Units Without Factory-Installed DisconnectUnits with Factory-Installed Disconnect All unitsConnections Terminals Installing Weatherproof CoverUnit Connect Primary Transformer Weatherproof Cover Installation ThermostatElectrical Data 38AUZ*07-14 Hz Units System Check PRE-START-UPSTART-UP Advanced Scroll Temperature Protection Label 38AUZ*07 Charging Chart 38AUZ*14 Charging Chart Base Unit Controls Routine System MaintenanceOperating Sequence Input ServiceComfort Alert Diagnostic Module LED Status Codes LockoutLubrication Cadm TroubleshootingCompressor Protection Field Refrigerant Access Ports Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Factory High-Flow Access PortsCompressor Stops on HIGH-PRESSURE Switch TroubleshootingProblem Solution Compressor does not RUN Fastener Torque ValuesUnit Operates TOO Long or Continuously Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient System is NoisyAppendix Catalog No 38AU-01SI Preliminary Information CUT Along Dotted Linecut Along Dotted Line

38AUZ specifications

The Carrier 38AUZ series is a line of air conditioning systems specifically designed to deliver optimal comfort and energy efficiency for both residential and commercial applications. Known for their advanced technology and robust performance, these units are ideal for a variety of climate conditions, ensuring consistent cooling and heating throughout the year.

One of the standout features of the Carrier 38AUZ series is its inverter technology, which allows the unit to adjust its cooling or heating output in real-time based on the ambient conditions. This results in lower energy consumption and reduced operating costs, making the system not only environmentally friendly but also budget-conscious. By minimizing temperature fluctuations, the inverter design promotes a more stable and comfortable indoor environment.

The 38AUZ units are equipped with high-efficiency compressors that enhance the system’s performance. These compressors operate quietly and efficiently, contributing to a lower noise level that is ideal for residential settings. Furthermore, they come with variable speed fan motors which offer precise airflow control, allowing users to customize their comfort level while ensuring energy savings.

In terms of build quality, the Carrier 38AUZ is constructed using durable materials designed to withstand harsh weather conditions. Its compact design allows for easy installation and maintenance, making it an ideal choice for urban environments where space is limited. Additionally, the system features a corrosion-resistant cabinet that extends its lifespan and maintains aesthetic appeal.

The 38AUZ series also includes a range of advanced control options. Users can benefit from smart technology integration, allowing for remote temperature control and scheduling through mobile devices. This feature not only enhances convenience but also provides users with complete control over their energy usage.

Moreover, the Carrier 38AUZ units come with various capacity options, catering to different space requirements. With a focus on energy efficiency, these systems often meet or exceed industry standards, including SEER ratings, ensuring optimal performance without sacrificing energy consumption.

In summary, the Carrier 38AUZ series is an exemplary choice for anyone looking to invest in a reliable, efficient, and advanced air conditioning system. With its inverter technology, high-efficiency compressors, smart control options, and durable construction, the 38AUZ not only delivers exceptional comfort but also promotes energy conservation, making it a smart choice for sustainable living.
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