Specifications

Copyright© by AOS 2015. All rights reserved.
Introduction
The purpose of this manual is to provide training for employees, associates and consumers in the basic concepts of resi-
denal electric and gas storage type water heaters.
This manual is organized into the following secons:
Electric Water Heater Parts
Photographs, illustraons and a brief descripon of the parts of an electric water heater.
Electric Water Heater Operaon
How standard electric water heaters transfer heat into water.
Gas Water Heater Parts
Photographs, illustraons and a brief descripon of the parts of a gas water heater.
Gas Water Heater Operaon
How standard gas and Flame Guard® water heaters transfer heat into water.
Applicaons
Types of water heaters available and their applicaon.
Water
Common potable water sources and how water impuries aect a water heater.
Specicaons
Formulas and informaon for determining the eciency of a water heater.
Safety
Corrosion, thermal expansion and excessive water temperatures.
Maintenance
Basic water heater maintenance procedures.
Sizing and Performance
Denion of hot water, how to determine hot water demand, water heater capacity and eciency.
Tesng and Standards
Quality, safety and eciency standards for water heaters.
Denions
Common terms used throughout this manual.
Upon compleon of this manual, the reader should have a basic understanding of electric and gas water heater
operaons, applicaons, performance, service issues, safety issues and industry standards.
This manual does not assume any parcular skill level or experience of the reader. AOS does not
accept any liability for incomplete, outdated or incorrect informaon provided in this manual. Improper servicing of water
heaters can result in property damage, bodily injury or death. Do not aempt to service any water heater if you have any
doubt about your ability to do so. Consult a qualied professional.