A.O. Smith G9-T5040NVR User Manual

100XXXXXX (A)_200XXXXXX (Ver. 00)
October 2016
Residential Gas
Water Heater
Installa on Instruc ons and
Use & Care Guide
Keep this manual in the pocket on heater for future reference whenever maintenance, adjustment or service is required.
Retain your original receipt as proof of purchase.
Residen al Atmospheric Gas Water Heater
with the Flammable Vapor Igni on Resistant
Safety System
Read this manual and the labels on the water heater before you install,
operate, or service it. If you have diffi culty following the direc ons, or
aren’t sure you can safely and properly do any of this work yourself:
• Call our Technical Assistance Hotline at 1-877-817-6750 or visit
h p:// www.AOSmithAtLowes.com. We can help you with installa on, opera ons,
troubleshoo ng, or maintenance. Before you call, write down the model and serial
number from the water heater’s data plate.
Incorrect installa on, opera on, or service can damage the water heater, your house
and other property, and present risks including fi re, scalding, electric shock, and
explosion, causing serious injury or death.
Do not store or use gasoline or other
fl ammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your build-
ing.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instruc ons.
• If you cannot reach your gas sup-
plier, call the fi re department.
Installa on and service must be per-
formed by a qualifi ed installer, service
agency or the gas supplier.
WARNING: If the informa on in
these instruc ons is not followed
exactly, a fi re or explosion may
result causing property damage,
personal injury or death.
LOW LEAD
CONTENT
Table of Contents Page
IMPORTANT SAFETY INFORMATION ............................................. 3
GETTING STARTED ........................................................................ 7
INSTALLATION ............................................................................. 14
OPERATION ................................................................................. 23
TROUBLESHOOTING ................................................................... 25
MAINTENANCE ........................................................................... 28
NOTES ......................................................................................... 31
REPAIR PARTS ............................................................................. 35
2000536058 (Ver. 00) 100277333 (A)
DO NOT RETURN THIS UNIT TO THE STORE

A.O. Smith G9-T5040NVR Specifications

General

Brand	A.O. Smith
Model	G9-T5040NVR
Fuel Type	Natural Gas
Thermal Efficiency	80%
Voltage	120V
Ignition Type	Electronic
Flow Rate	9.8 GPM

Summary

Important Safety Information

Safety Alert Symbol and General Warnings

Explains the safety alert symbol and general warnings for user safety.

Installation and Maintenance Risks

Outlines hazards and precautions during installation and maintenance.

Operation Risks and Precautions

Details hazards and necessary precautions during water heater operation.

Fire and Explosion Hazards

Addresses risks of fire, explosion, and flammable vapors.

Carbon Monoxide and Burn Hazards

Covers carbon monoxide poisoning risks and burn hazards from hot components.

Getting Started

Combustion and Ventilation Air Supply

Specifies requirements for adequate air for combustion and ventilation.

Ventilation Calculation and Options

Guides on calculating ventilation needs and selecting air sources.

Venting System Requirements

Details the instructions and requirements for installing the vent system.

Gas Piping and Pressure Guidelines

Provides guidelines for gas piping installation and pressure checks.

Installation

Verify Home Readiness and Pressure

Checks home plumbing, water pressure, and thermal expansion tank.

Water Leak Prevention Measures

Outlines precautions and devices to prevent water leaks and damage.

Select Appropriate Installation Location

Ensures the installation location meets all safety and operational requirements.

Remove and Install Water Heater

Step-by-step procedures for removing the old and installing the new unit.

Connect Components and Valves

Connects T&P relief valve, shutoff, mixing valves, and water supply lines.

Gas Connections and Draft Hood Installation

Makes gas connections, installs draft hood, and checks for leaks.

Operation

Lighting and Shut Down Procedures

Step-by-step guide for lighting the pilot and shutting down the unit.

Emergency Shutdown and Vent Checks

Procedures for emergency shutdown and testing the vent system.

Adjusting Water Temperature Settings

Instructions on how to set and adjust the water heater's temperature.

Troubleshooting

No Hot Water Diagnosis

Diagnosing and resolving issues related to the absence of hot water.

Pilot and Status Light Issues

Troubleshooting pilot light and status light indicators.

Insufficient or Slow Hot Water

Identifying causes for low hot water volume or slow heating performance.

T&P Relief Valve Drips and Chart

Troubleshooting relief valve drips and using the status light chart.

Maintenance

Tank Draining and Flushing

Steps to drain and flush the tank to remove sediment buildup.

Anode Rod and T&P Valve Maintenance

Procedures for inspecting and maintaining the anode rod and T&P valve.

Air Filter Inspection and Cleaning

Routine inspection and cleaning of the air filter at the base of the unit.

Repair Parts

Repair Parts List and Kits

A list of available replacement parts, kits, and their illustrations.