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AAON V3-A User Manual

AAON V3-A
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V3 Series
Vertical Indoor Air Handling Units
Installation, Operation
& Maintenance
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WARNING
WARNING
QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life. Startup and
service must be performed by a
Factory Trained Service Technician. A
copy of this IOM should be kept with
the unit.
WARNING

Table of Contents

Questions and Answers:

AAON V3-A Specifications

General IconGeneral
RefrigerantR-410A
Voltage208/230V, 460V, 575V
Sound LevelVaries by model and configuration
Voltage Options208/230V, 460V, 575V
Unit DimensionsVaries by model
WeightVaries by model
Cabinet ConstructionHeavy-duty galvanized steel

Summary

Safety Information

General Safety Warnings

Covers cautions, warnings, and dangers for safe operation, including electrical hazards and gas leaks.

V3 Series Feature String Nomenclature

Cooling System Options

Details cooling types, rows, stages, and fin pitch options.

Heating System Options

Covers heating types, designation, stages, and supply air blower configurations.

Codes and Ordinances

Installation Procedures

General Installation Notes

Covers design, shipping splits, assembly, and general placement.

Unit Location and Clearances

Details placement requirements and required clearances for installation.

Installation Details

Clearances and Codes

Covers distances, codes, and vent terminal requirements.

Unit Lifting and Assembly

Lifting and Handling Precautions

Covers safe unit handling and lifting procedures.

Refrigeration Components

Evaporator Coil and Refrigerant Piping

Covers coil installation and piping considerations.

Thermal Expansion Valve (TXV) Installation

Covers TXV bulb placement and insulation.

Energy Recovery Setup and Balancing

Maintenance Procedures

Energy Recovery Wheel Cleaning

Describes cleaning the wheel and its segments.

Component Maintenance and Setup

Operation and Startup

Service and Component Replacement

Electrical Connections and Safety

Unit Electrical Requirements

Details power supply, wiring, and protection requirements.

Electrical Wiring and Openings

Electrical System Considerations

Gas Heating Condensate Management

Condensate Drain Piping and Trapping

Covers drain trap installation and freeze protection.

Furnace Venting Systems

General Venting Requirements

Covers exhaust, codes, and vent system types.

Furnace Venting Safety

Highlights safety concerns related to venting.

Venting Configurations

Advanced Venting Systems

Gas Supply and Piping

Gas Piping Installation and Sizing

Covers codes, sizing, and connection requirements.

Gas Leak Testing Procedure

Emphasizes the importance of leak checking.

Gas System Pressures and Supports

Inlet and Manifold Gas Pressures

Details required gas pressures for operation.

Gas Pressure Regulation

Covers regulator and overpressure protection requirements.

Gas Piping Details and Leak Testing

Gas Heater Input and Startup Precautions

Unit Startup Procedures

General Startup Checks

Covers essential checks before operation.

Fan Speed and Refrigerant Charge

Refrigerant Charge Adjustment

Discusses field adjustments for system charge.

Refrigerant Charge Verification

Liquid Sub-Cooling Measurement

Details how to measure and interpret liquid sub-cooling.

Superheat and Sub-cooling Adjustment

Evaporator Superheat Measurement

Explains how to measure and interpret evaporator superheat.

System Charge Adjustment Guidelines

Provides guidance on correcting over/undercharged systems and TXV adjustment.

Gas Heater Operation

Gas Heater Safety and Operating Instructions

Covers pre-operation checks and step-by-step instructions.

Gas Heater Startup Procedure

Step-by-Step Startup Guide

Details the sequence for starting the gas heater.

Burner Flame Characteristics

Unit Operation Modes

Gas Heater Controls and Shutdown

Ignition Control and Flame Sensing

Ignition Control Sequence of Operation

Describes the logic of the ignition control module.

Furnace Safety Switches

Air Pressure, Blocked Flue, and Rollout Switches

Describes the function of various safety switches.

High Limit Safety Controls

High Limit Switch Functions

Explains the purpose of the two high limit switches.

Troubleshooting and Maintenance

Gas Heater Troubleshooting

Offers solutions for common gas heater issues.

Gas Heating System Operation and Checks

Gas Heating Operation and Safety

Covers safe operation and checks for the gas heating system.

Comprehensive Furnace Maintenance

Furnace Inspection and Operation Verification

E-Coated Coil Cleaning Procedure

Coil Cleaning Safety and Preparation

Covers safety precautions and initial cleaning steps.

Recommended Coil Cleaning Steps

Details the two-step cleaning process for E-coated coils.

Phase and Brownout Protection Module

DPM Setup and Configuration

Details how to set up and configure the phase monitor.

DPM Monitoring and Faults

Filter Replacement and Support

V3 Series Startup Checklist

Pre-Startup Inspection Items

Lists crucial checks to perform before unit startup.

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