Step 5—Elevate Unit

Accumulation of water and ice in base pan may cause equipment damage.

Elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit.

COIL

SENSING

BULB

EQUALIZER

TUBE

THERMOSTATIC

EXPANSION

VALVE

A88382

Fig. 4—Typical TXV Installation

Step 6—Check Indoor Expansion Device

For proper unit operation and reliability, units must be installed with hard shutoff TXV specifically designed to operate with Puron® . Do not use R-22 TXV. Do not install with evaporator coils having capillary tube metering devices or pistons.

For TXV kit part number and charging instructions, refer to TXV label in outdoor unit.

FURNACE COILS

If TXV installation is required, remove existing AccuRater® from indoor coil. Refer to Fig. 4 and 5 and install TXV kit (specifically designed for Puron® ) as follows:

1.Install suction tube adapter.

2.Install liquid flare-to-sweat adapter.

3.Connect external equalizer tube to fitting on suction tube adapter.

4.Position sensing bulb on horizontal portion of suction tube adapter. Secure using supplied hardware.

5.Insulate bulb after installation. (See Fig. 5.)

6.Leak check all connections.

FAN COILS

If indoor unit (fan coil) comes factory equipped with a bi-flow hard shutoff TXV specifically designed for Puron® , no TXV change is required.

If fan coil is not designed for Puron® , a Puron® TXV installation is required. Refer to TXV kit Installation Instructions for details on TXV installation.

Step 7—Check Defrost Thermostat

Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distributor

and feeder tube going into outdoor coil. At the end of 1 of the feeder tubes, there is a 3/8-in. OD stub tube approximately 3 in. long. (See Fig. 6.) The defrost thermostat should be located on stub tube. Note that there is only 1 stub tube used with liquid header, and on most units it is the bottom circuit.

Step 8—In Long-Line Applications, Install Liquid-Line Solenoid Valve (LSV)

For refrigerant piping arrangements with equivalent lengths greater than 50 ft or when elevation difference between indoor and outdoor unit is greater than ± 20 ft, follow all requirements of the Long-Line Guideline section in the Application Guideline and

SENSING BULB

STRAP

8 O'CLOCK

4 O'CLOCK

A00399

Fig. 5—Positioning of Sensing Bulb

FEEDER TUBE

STUB TUBE

DEFROST

THERMOSTAT

A97517

Fig. 6—Defrost Thermostat Location

Service Manual for Residential Split-System Air Conditioners and Heat Pumps Using Puron® Refrigerant.

If required by Long-Line Application Guideline, install LSV kit part No. KHALS0401LLS specifically designed for Puron® Heat Pump. LSV should be installed between filter drier and indoor coil, as close as possible to filter drier. Follow the Installation Instruc- tions included with accessory kit.

IMPORTANT: Flow arrow must point toward outdoor unit.

Step 9—Making Piping Connections

Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow-control devices, including solenoid valves.

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Carrier 38EYA Elevate Unit, Check Indoor Expansion Device, Check Defrost Thermostat, Making Piping Connections
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38EYA specifications

The Carrier 38EYA is a high-efficiency, ducted air conditioning system that stands out in the HVAC industry for its blend of advanced technology, reliable performance, and energy-saving capabilities. Designed for residential applications, the 38EYA model showcases Carrier’s commitment to innovation and comfort.

One of the key features of the Carrier 38EYA is its outstanding SEER (Seasonal Energy Efficiency Ratio) rating, often exceeding 16, which underscores its energy efficiency. This high rating means that the unit consumes less electricity, leading to lower utility bills while maintaining a comfortable indoor climate. The system is equipped with a variable-speed compressor that adjusts its output to meet the cooling demands of the space, providing precise temperature control while minimizing energy consumption.

In addition to its efficiency, the 38EYA includes advanced refrigerant technology. Utilizing R-410A, a more environmentally friendly refrigerant, this unit contributes to reduced global warming potential compared to older refrigerants. The Carrier 38EYA also features a corrosion-resistant steel cabinet, ensuring durability and longevity in varying weather conditions.

User-friendly operation is enhanced through the optional smart thermostat, which allows homeowners to control their cooling system remotely. This integration with smart technology provides convenience and helps optimize energy use, further enhancing savings on energy costs. Additionally, the whisper-quiet operation of the system ensures that homeowners can enjoy a peaceful environment without the distraction of loud machinery.

Furthermore, the Carrier 38EYA incorporates a multi-stage filtration system that improves indoor air quality by capturing dust, allergens, and other pollutants. This feature is particularly beneficial for households with allergy sufferers or pets.

Overall, the Carrier 38EYA represents a blend of energy efficiency, advanced technology, and user-friendly features, making it a top choice for homeowners seeking a reliable and effective home cooling solution. Its commitment to sustainability, combined with optimal performance, positions the 38EYA as a leading option in modern air conditioning systems, ensuring comfort and satisfaction for years to come.
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