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A.O. Smith XCV300 - User Manual

A.O. Smith XCV300
32 pages
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THIS SERVICE HANDBOOK IS FOR USE BY QUALIFIED SERVICE PROFESSIONALS ONLY.
LOW LEAD
CONTENT
Service Handbook
Residential FVIR
Gas Water Heaters
MODELS:
GCV, GCVH, GVR, GCVL, GVRL, GCVT - SERIES 300/301
XCV, XVR, XCVL, XGV, XVRL, XCVT - SERIES 300/301
327726-001
May 2014

Table of Contents

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Summary

Basics of Residential Gas Water Heaters

General Safety Precautions

General safety precautions and instructions for servicing the water heater.

Typical Completed Installation

Diagram and explanation of a typical completed installation of a gas water heater.

System Basics Overview

Overview of the water heater's system, including gas control valve and thermostat.

Combustion Chamber and TCO Switch

Details on the combustion chamber, flame arrestor, and thermal cutoff switch.

Pilot Lighting and Diagnostic Codes

How to Light the Pilot

Step-by-step instructions for lighting the pilot light on the water heater.

Pilot Fails to Ignite Troubleshooting

Troubleshooting steps when the pilot light fails to ignite.

Pilot Lit, Status Light Not Blinking

Diagnosing issues when the pilot is lit but the status light is not blinking.

Understanding Diagnostic Flash Codes

Explanation of LED status light codes for diagnosing operational issues.

System Checks and Troubleshooting

Performing a Draft Test

Procedure to test the vent system's draft by observing smoke behavior.

Checking System Connections

Checking various wiring and pipe connections for proper system operation.

Gas Pressure Measurement

Methods for checking gas supply and manifold pressures using a pressure gauge.

Thermopile Performance Checks

Testing the thermopile's voltage output in open and closed circuit conditions.

Common Issues and Solutions

Troubleshooting No Hot Water

Troubleshooting guide for situations where the water heater is not heating water.

Resolving Not Enough Hot Water

Diagnosing and resolving issues with insufficient hot water supply.

Addressing Tank Leak and Condensation

Identifying and addressing potential tank leaks and condensation issues.

Resolving Temperature Too High

Troubleshooting and adjusting excessively high water temperatures.

Low Water Pressure and Odor Issues

Diagnosing low hot water pressure and addressing unpleasant water odors.

Service Procedures and Maintenance

Manifold and Burner Assembly Service

Procedures for removing, servicing, and replacing manifold and burner components.

Pilot and Thermopile Assembly Replacement

Detailed steps for replacing the pilot and thermopile assembly.

Cleaning Air Intake and Combustion Areas

Instructions for cleaning the base-ring filter, combustion chamber, and flame arrestor.

Igniter System Testing

Testing the piezoelectric igniter system for proper spark generation.

Gas Control Valve;Thermostat Replacement

Detailed steps for removing and replacing the gas control valve and thermostat.

Tank Draining and Flushing Procedure

Recommended procedure for draining and flushing the water heater tank.

Supplements and Installation Guidance

Evaluating Combustion and Ventilation Air

Guidelines for calculating and ensuring adequate combustion and ventilation air.

Attic Installation Considerations

Key issues and solutions for water heaters installed in attics, including pilot outage, temperature, and ventilation.

Field Installation of Draft Hoods

Instructions for properly connecting draft hoods to vent pipes, including types and procedures.

Summary

Basics of Residential Gas Water Heaters

General Safety Precautions

General safety precautions and instructions for servicing the water heater.

Typical Completed Installation

Diagram and explanation of a typical completed installation of a gas water heater.

System Basics Overview

Overview of the water heater's system, including gas control valve and thermostat.

Combustion Chamber and TCO Switch

Details on the combustion chamber, flame arrestor, and thermal cutoff switch.

Pilot Lighting and Diagnostic Codes

How to Light the Pilot

Step-by-step instructions for lighting the pilot light on the water heater.

Pilot Fails to Ignite Troubleshooting

Troubleshooting steps when the pilot light fails to ignite.

Pilot Lit, Status Light Not Blinking

Diagnosing issues when the pilot is lit but the status light is not blinking.

Understanding Diagnostic Flash Codes

Explanation of LED status light codes for diagnosing operational issues.

System Checks and Troubleshooting

Performing a Draft Test

Procedure to test the vent system's draft by observing smoke behavior.

Checking System Connections

Checking various wiring and pipe connections for proper system operation.

Gas Pressure Measurement

Methods for checking gas supply and manifold pressures using a pressure gauge.

Thermopile Performance Checks

Testing the thermopile's voltage output in open and closed circuit conditions.

Common Issues and Solutions

Troubleshooting No Hot Water

Troubleshooting guide for situations where the water heater is not heating water.

Resolving Not Enough Hot Water

Diagnosing and resolving issues with insufficient hot water supply.

Addressing Tank Leak and Condensation

Identifying and addressing potential tank leaks and condensation issues.

Resolving Temperature Too High

Troubleshooting and adjusting excessively high water temperatures.

Low Water Pressure and Odor Issues

Diagnosing low hot water pressure and addressing unpleasant water odors.

Service Procedures and Maintenance

Manifold and Burner Assembly Service

Procedures for removing, servicing, and replacing manifold and burner components.

Pilot and Thermopile Assembly Replacement

Detailed steps for replacing the pilot and thermopile assembly.

Cleaning Air Intake and Combustion Areas

Instructions for cleaning the base-ring filter, combustion chamber, and flame arrestor.

Igniter System Testing

Testing the piezoelectric igniter system for proper spark generation.

Gas Control Valve;Thermostat Replacement

Detailed steps for removing and replacing the gas control valve and thermostat.

Tank Draining and Flushing Procedure

Recommended procedure for draining and flushing the water heater tank.

Supplements and Installation Guidance

Evaluating Combustion and Ventilation Air

Guidelines for calculating and ensuring adequate combustion and ventilation air.

Attic Installation Considerations

Key issues and solutions for water heaters installed in attics, including pilot outage, temperature, and ventilation.

Field Installation of Draft Hoods

Instructions for properly connecting draft hoods to vent pipes, including types and procedures.

A.O. Smith XCV300 Specifications

General IconGeneral
ModelXCV300
CategoryWater Heater
TypeElectric
Warranty3-Year Limited Tank, 1-Year Limited Parts
Capacity300 liters
Tank MaterialGlass-lined steel
Tank Capacity300 liters
Height60 inches
Diameter22 inches

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