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Carrier Infinity 24VNA660 User Manual

Carrier Infinity 24VNA660
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Installation Instructions
NOTE: Read the entire instruction manual before starting the installation.
Table of contents
PAGE NO. PAGE NO.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inverter Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step1 – Check Equipment and Job Site . . . . . . . . . . . . . . . . . . . . . . . . 3
Unpack Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspect Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step2 – Install on a Solid, Level Mounting Pad . . . . . . . . . . . . . . . . . . 3
Step3 – Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step4 – Operating Ambient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step5 – Elevate Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step6 – In Long-Line Applications, Install Liquid-Line Solenoid Valve
(LSV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step7 – Make Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 1 – Refrigerant Connections and Recommended Liquid and Va-
por Tube Diameters (in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 – Accessory Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Outdoor Unit Connected to Factory-Approved Indoor Unit . . . . 6
Install Liquid-Line Filter Drier Indoor . . . . . . . . . . . . . . . . . . . . . 6
Refrigerant Tubing connection Outdoor. . . . . . . . . . . . . . . . . . . . 6
Sweat Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Evacuate Refrigerant Tubing and Indoor Coil . . . . . . . . . . . . . . . 6
Deep Vacuum Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Final Tubing Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step8 – Make Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Route Ground and Power Wires . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Ground and Power Wires . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Final Wiring Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step9 – Compressor Crankcase Heater. . . . . . . . . . . . . . . . . . . . . . . . . 7
Airflow Setup for Infinity Control Furnace or FE Fan Coil (communi-
cating). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step10 – Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step11 – Start-Up & Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Follow these steps to properly start up the system: . . . . . . . . . . . 8
Step12 – Pumpdown & Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Evacuation and Recovery of Refrigerant from within 24VNA6 11
Step13 – System Functions and Major Components . . . . . . . . . . . . . 12
Primary Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Utility Interface With Infinity Control . . . . . . . . . . . . . . . . . . . . 12
Infinity Control, Green Communications (COMM) Light . . . . . 12
Amber Status Light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5x7 LED Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VFD Communications Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Bluetooth® Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Variable Frequency Drive (VFD) . . . . . . . . . . . . . . . . . . . . . . . . 14
Input Filter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Variable Speed Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Time Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Vapor Injection Electronic Expansion Valve (EXV-VI) . . . . . . 14
BLDC Inverter-Controlled Fan Motor . . . . . . . . . . . . . . . . . . . . 14
Pressure Equalization Valve (PEV) . . . . . . . . . . . . . . . . . . . . . . 14
High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Outdoor Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Crankcase Heater Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Infinity Controlled low ambient cooling . . . . . . . . . . . . . . . . . . 15
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Systems Communication Failure . . . . . . . . . . . . . . . . . . . . . . . . 15
Model Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3 – Model Plug Information . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pressure Switch Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Line Voltage Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Forced Defrost Pins (J9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Temperature Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 4 – Resistance Values versus Temperature . . . . . . . . . . . . . 15
Table 5 – ODT Resistance Values versus Temperatures . . . . . . . . 16
Outdoor Air Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outdoor Coil Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Discharge Thermistor (ODT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Failed Thermistor Default Operation . . . . . . . . . . . . . . . . . . . . . 16
Variable Speed Compressor Winding Resistance . . . . . . . . . . . 16
Table 6 – Variable Speed Compressor Resistances
(winding resistance at 68°F? (20°F) . . . . . . . . . . . . . . . . . . . . . . . . 16
Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status Code Recall Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Emergency Mode Connections with a Conventional Thermostat17
Table 7 – Fault Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 8 – Malfunction Lockout Durations . . . . . . . . . . . . . . . . . . . 21
FINAL CHECKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CARE AND MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
24VNA6
Infinity™ Variable Speed Air Conditioner
with Greenspeed™ Intelligence
2 to 5 Nominal Tons

Table of Contents

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Carrier Infinity 24VNA660 Specifications

General IconGeneral
Model Number24VNA660
Energy Star CertifiedYes
RefrigerantR-410A
Compressor TypeVariable Speed
Cooling StagesVariable Speed
Voltage208/230V
Phase1
Cooling Capacity60000 BTU/h
Warranty10-year parts limited warranty upon registration

Summary

Safety Precautions

Electrical Hazards

Covers explosion, shock, high voltage, and general unit operation hazards.

Physical and Operational Hazards

Addresses cut hazards, unit placement, and general operational safety.

Installation Steps

Site Preparation and Unit Mounting

Includes unpacking, inspection, mounting, clearances, and elevation guidelines.

Piping and Electrical Connections

Covers refrigerant piping, solenoid valves, and electrical wiring.

System Start-Up and Charging

Initial Start-Up and Refrigerant Charge

Outlines start-up procedures and refrigerant charging methods.

Pumpdown and Evacuation Process

Details system pumpdown and evacuation procedures.

System Components and Troubleshooting

System Operation and Controls

Explains UI, PCM, system modes, and communication indicators.

Component Descriptions

Describes key components like VFD, compressor, sensors, and valves.

Fault Codes and Maintenance

Details fault codes, malfunctions, final checks, and maintenance.

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