LEGEND

24-V FACTORY WIRING

24-V FIELD WIRING

FIELD SPLICE CONNECTION

ODT

EHR

SHR

OUTDOOR THERMOSTAT EMERGENCY HEAT RELAY SUPPLEMENTAL HEAT RELAY

A97413

WIRING DIAGRAM NOTES:

1.CARRIER THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS TSTAT _ _ _ _ _ _ _.

2.WIRING MUST CONFORM TO NEC LOCAL CODES.

3.ALL UNITS ARE EQUIPPED WITH PRESSURE SWITCHES, TEMPERATURE SWITCH, AND 5-MINUTE COMPRESSOR CYCLE PROTECTION. CONNECT 24-V FIELD WIRING TO FACTORY-PROVIDED STRIPPED LEADS.

4.THERMOSTATS ARE FACTORY CONFIGURED WITH 5-MINUTE COMPRESSOR CYCLE PROTECTION AND 4 CYCLES PER HR LIMIT. SEE THERMOSTAT INSTALLATION INSTRUCTIONS.

5.TO STAGE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS.

6.UNDERLINED LETTER ON DUAL TERMINAL INDICATES USAGE.

FOR EXAMPLE: O/W2 MEANS O

O/W2 MEANS W2

7.OUTDOOR TEMPERATURE SENSOR MUST BE ATTACHED IN ALL DUAL FUEL INSTALLATIONS. JUMPER WIRE BETWEEN O/W2 AND L THERMOSTAT TERMINALS MUST BE PRESENT.

8.Y1 AND O CONNECTIONS TO 2-STAGE FURNACES MAY NOT EXIST OR MAY ONLY BE A WIRE RATHER THAN A SCREW TERMINAL.

Do not vent refrigerant to atmosphere. Recover during system repair or final unit disposal.

Follow these steps to properly start up the system.

1. Fully back seat (open) liquid and vapor service valves.

2. Unit is shipped with valve stem(s) front seated (closed) and caps installed. replace stem caps after system is opened to refrigerant flow (back seated). Replace caps finger-tight and tighten with wrench an additional 1/12 turn. Use a backup wrench on valve body flats to prevent distortion of sheet metal.

 

3.

Close electrical disconnects to energize system.

 

4.

Set room thermostat at desired temperature. Be sure set point

 

 

is below indoor ambient temperature.

 

5.

Set room thermostat to HEAT or COOL and fan control to ON

 

A00010

or AUTO mode, as desired. Operate unit for 15 minutes.

→

Fig. 18—Phase Monitor Control

Check system refrigerant charge.

 

Back seating service valves are not equipped with Schrader valves. Fully back seat (counter clockwise) valve stem before removing gage port cap.

12

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Carrier 38EYA instruction manual Wiring Diagram Notes
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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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