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Carrier INFINITY 24ANA User Manual

Carrier INFINITY 24ANA
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24ANA
Infinityt Series Air Conditioners with PuronR
Sizes 24 To 60
2To5NominalTons
Installation Instructions
A05176
Fig. 1 --- 24ANA
NOTE: Read the entire instruction manual before starting the
installation.
Unless otherwise noted, information in these installation
instructions pertain to both 24ANA1 and 24ANA7 series units.
Information that is unique to the 24ANA7 series will be identified
as such; likewise information that is unique to the 24ANA1 series
will also be identified.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 2.......................
INSTALLATION RECOMMENDATIONS 2.............
INSTALLATION 3--11..............................
Step 1 -- Check Equipment & Jobsite 3...............
Step 2 -- Install on Solid Pad 3......................
Step 3 -- Clearance Requirements 3..................
Step 4 -- Operating Ambient 3......................
Step 5 -- Install TXV 3 -- 4.........................
Step 6 -- Make Piping Connections 5 -- 8..............
Step 7 -- Make Electrical Connections 8 -- 9............
Step 8 -- Compressor Crankcase Heater 9..............
Step 9 -- Install Accessories 9......................
Step 10 -- Make Airflow Connections 9...............
Step 11 -- Start--Up 9 -- 10..........................
Step 12 -- System Functions and Seq. of Operation 10 -- 11
Step 13 -- Check Charge 11.........................
TROUBLESHOOTING 12 -- 14, 16.....................
FINAL CHECKS 15.................................
CARE AND MAINTENANCE 15......................
PURON REFRIGERANT QUICK REF. GUIDE 18.......
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Carrier INFINITY 24ANA Specifications

General IconGeneral
BrandCarrier
ModelINFINITY 24ANA
CategoryAir Conditioner
LanguageEnglish

Summary

SAFETY CONSIDERATIONS

INSTALLATION RECOMMENDATIONS

INSTALLATION

Check Equipment and Job Site

Inspect unit and job site for damage and verify specifications match job requirements.

Install on a Solid, Level Mounting Pad

Mount the unit on a level pad, using tie-downs if required by codes or conditions.

Clearance Requirements

Maintain specified clearances for airflow, wiring, piping, and service access.

Operating Ambient

Define minimum (55°F) and maximum (125°F) outdoor operating temperatures for cooling.

Install TXV

Install the Thermostatic Expansion Valve (TXV) for Puron systems, replacing fixed orifice devices.

Make Piping Connections

Connect refrigerant tubing, emphasizing POE oil protection and system evacuation.

Make Electrical Connections

Connect field wiring to the unit, ensuring compliance with codes and proper grounding.

Compressor Crankcase Heater

Instructions for powering the compressor crankcase heater before starting the unit.

Install Accessories

Refer to individual instructions for installing accessory kits and components.

Make Airflow Selections

Procedures for selecting appropriate airflow settings for different furnace and fan coil combinations.

Start-Up

Steps to properly start up the system after installation, including evacuation and initial operation.

System Functions and Sequence of Operation

Overview of two-stage cooling operation, communication lights, and system modes.

Check Charge

Procedure for verifying and adjusting the system's refrigerant charge using subcooling.

TROUBLESHOOTING

Systems Communication Failure

Diagnosing and resolving communication issues between system components.

Model Plug Recognition

Importance of a valid model plug for unit operation.

Pressure Switch Protection

Response to high or low pressure switch trips and lockout conditions.

Control Board Fault

Actions to take when the outdoor unit control board fails.

Brown Out Protection

How the unit reacts to low voltage conditions and brown outs.

230V Line Detection

Verifying 230V power at the compressor contactor for cooling demand.

Compressor Voltage Sensing

Monitoring compressor motor voltage status for potential issues.

Contactor Shorted Detection

Identifying if a contactor is stuck closed when no demand exists.

Compressor Thermal Cutout (24ANA7 Models)

Control response to thermal protector trips in 24ANA7 models, including lockout.

Compressor Thermal Cutout (24ANA1 Models)

Control response to thermal protector trips in 24ANA1 models, including lockout.

Contactor Open Issues

Diagnosing open contactors for low/high stages when compressor should be starting.

Compressor Start Detection (24ANA7)

Monitoring start voltage at VR/VS terminals for 24ANA7 compressor starts.

Low/High Stage Switching Behavior (24ANA7)

Troubleshooting pressure/current changes during stage transitions for 24ANA7.

Low/High Stage Switching Behavior (24ANA1)

Troubleshooting pressure/current changes during stage transitions for 24ANA1.

Major Components Overview

Overview of key components like the 2-stage control board and compressor.

Temperature Thermistors Function

Explanation of thermistors sensing outdoor ambient and coil temperatures.

Thermistor Sensor Comparison

How the control compares outdoor and coil sensor readings for proper operation.

Failed Thermistor Default Operation

Default operations and limitations when outdoor air or coil thermistors fail.

Status Codes Interpretation

Interpreting amber status light flashes to diagnose system problems and fault codes.

Normal Operation Status

Indicates normal system operation when no call for unit activity is present.

Emergency Mode Status (24ANA1)

Operating the 24ANA1 in emergency mode with a standard thermostat.

System Communications Failure Status

Diagnosing and resolving communication issues via status codes.

Invalid Model Plug Status

Troubleshooting status codes for missing or invalid model plugs.

High Pressure Switch Open Status

Status codes and actions for high-pressure switch trips.

Low Pressure Switch Open Status

Status codes and actions for low-pressure switch trips.

No 230v at Unit Status

Status codes for verifying 230V power at the contactor.

Outdoor Air Temp Sensor Fault Status

Status codes for troubleshooting outdoor air temperature sensor faults.

Outdoor Coil Sensor Fault Status

Status codes for troubleshooting outdoor coil temperature sensor faults.

Thermistors Out of Range Status

Status codes for improper sensor relationships between coil and outdoor air.

Low Stage Thermal Cutout Status

Status codes for low stage thermal protector trips and control response.

High Stage Thermal Cutout Status

Status codes for high stage thermal protector trips and control response.

Contactor Shorted Status

Status codes for detecting a stuck closed contactor.

No 230V at Compressor Status (24ANA1)

Status codes for troubleshooting no 230V supply to the compressor.

Low Stage Start Failure Status (24ANA7)

Status codes for investigating low stage start voltage failures.

Low Stage Start Failure Lockout Status (24ANA7)

Status codes for lockout after consecutive low stage start failures.

High Stage Start Failure Status (24ANA7)

Status codes for investigating high stage start voltage failures.

High Stage Start Failure Lockout Status (24ANA7)

Status codes for lockout after consecutive high stage start failures.

Low Stage Thermal Lockout Status

Status codes for thermal cutout in multiple low stage cycles leading to lockout.

High Stage Thermal Lockout Status

Status codes for thermal cutout in multiple high stage cycles leading to lockout.

Low Pressure Lockout Status

Status codes for lockout after consecutive low pressure switch trips.

High Pressure Lockout Status

Status codes for lockout after consecutive high pressure switch trips.

Low Contactor Open Status (24ANA7)

Status codes for diagnosing an open low stage contactor.

High Contactor Open Status (24ANA7)

Status codes for diagnosing an open high stage contactor.

FINAL CHECKS

CARE AND MAINTENANCE

PURON REFRIGERANT QUICK REFERENCE GUIDE

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