Carrier 24VNA9 Infinity 19VS User Manual

Installation Instructions
24VNA9
Infinityr 19VS Variable Speed Air Conditioner
with Puronr Refrigerant
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
PAGE NO.
SAFETY CONSIDERATIONS 2......................................................................
INSTALLATION RECOMMENDATIONS 2............................................................
INSTALLATION 3..................................................................................
Step 1 — Check Equipment and Job site 3.........................................................
Step 2 — Install on Solid, Level Mounting Pad 3....................................................
Step 3 — Clearance Requirements 4..............................................................
Step 4 — Operating Ambient 4..................................................................
Step 5 — Elevate Unit 4.......................................................................
Step 6 — Making Piping Connections 4...........................................................
Step 7 — Make Electrical Connections 5...........................................................
Step 8 — Compressor Internal Crankcase Heater 8...................................................
Step 9 — Install Accessories 8...................................................................
Step 10 — Start-- Up 8..........................................................................
Step 11 — System Functions and Sequence of Operation 10.............................................
Step 12 — Check Charge 10......................................................................
Step 13 — Pumpdown & Evacuation 13.............................................................
MAJOR COMPONENTS 13...........................................................................
TROUBLESHOOTING 14.............................................................................
FINAL CHECKS 20..................................................................................
CARE AND MAINTENANCE 20.......................................................................
PURONr REFRIGERANT QUICK REFERENCE GUIDE 20...............................................
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 24
V
N
A
9 --- 3 S I ( r e v 1 )
Replaces: 24VNA9---2SI

Carrier 24VNA9 Infinity 19VS Specifications

General

SEER Rating	19
Cooling Capacity	2-5 tons
Refrigerant	R-410A
Energy Star Certified	Yes
Cooling Stages	Variable
Voltage	208/230 V
Phase	1
Compressor Type	Variable Speed
Sound Level	56 dB
Sound Level (Outdoor Unit)	68 dB

Summary

Safety Considerations

Installation Recommendations

Installation

Check Equipment and Job Site

Inspect unit and job site for completeness and suitability before proceeding with installation.

Install on Solid, Level Mounting Pad

Ensure the outdoor unit is placed on a stable, level mounting pad to prevent vibration and damage.

Clearance Requirements

Maintain specified clearances around the unit for proper airflow and service access.

Operating Ambient Conditions

Understand the acceptable outdoor temperature ranges for unit operation in cooling mode.

Elevate Unit for Drainage

Ensure unit is elevated to prevent water or ice accumulation and ensure proper drainage.

Make Piping Connections

Connect refrigerant lines, ensuring proper sizing, insulation, and leak-free brazed joints.

Make Electrical Connections

Connect field wiring to the unit's control box and power terminals according to codes and diagrams.

Compressor Crankcase Heater Operation

Understand the crankcase heater's function and power requirements for compressor longevity.

Install External Accessories

Install any approved optional accessories like support feet or wind baffles as per their instructions.

System Start-Up Procedure

Follow the steps for initial system energization and basic operation checks.

System Functions and Sequence of Operation

Understand how the unit operates in different modes and stages, controlled by the user interface.

Check Refrigerant Charge

Verify and adjust refrigerant charge using subcooling method for optimal performance.

Pumpdown & Evacuation Procedure

Learn how to safely pump down or evacuate refrigerant from the system.

Major Components

Troubleshooting

Communication and Model Configuration

Diagnose issues related to system communication loss and correct model plug installation.

Field Control and Sensor Wiring

Understand connections for field controls, pressure transducers, and equalizer valves.

Pressure Switch and Control Faults

Troubleshoot faults related to high/low pressure switches and general control board failures.

Power Supply and Voltage Issues

Diagnose problems arising from power interruptions, brownouts, or incorrect voltage levels.

Thermistor and Temperature Sensing Problems

Identify issues with temperature sensors (OAT, OCT, OST, ODT) and their resistance values.

Compressor and Fan Motor Performance

Troubleshoot winding resistance for the compressor and fan motor for proper operation.

Status Codes and User Interface Diagnostics

Interpret amber LED status codes and utilize the user interface for system diagnostics.

Final Checks

Care and Maintenance

Puron® Refrigerant Quick Reference Guide