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-
denal electric and gas storage type water heaters.
This manual is organized into the following secons:
Electric Water Heater Parts
Photographs, illustraons and a brief descripon of the parts of an electric water heater.
Electric Water Heater Operaon
How standard electric water heaters transfer heat into water.
Gas Water Heater Parts
Photographs, illustraons and a brief descripon of the parts of a gas water heater.
Gas Water Heater Operaon
How standard gas and Flame Guard® water heaters transfer heat into water.
Applicaons
Types of water heaters available and their applicaon.
Water
Common potable water sources and how water impuries aect a water heater.
Specicaons
Formulas and informaon for determining the eciency of a water heater.
Safety
Corrosion, thermal expansion and excessive water temperatures.
Maintenance
Basic water heater maintenance procedures.
Sizing and Performance
Denion of hot water, how to determine hot water demand, water heater capacity and eciency.
Tesng and Standards
Quality, safety and eciency standards for water heaters.
Denions
Common terms used throughout this manual.
Upon compleon of this manual, the reader should have a basic understanding of electric and gas water heater
operaons, applicaons, performance, service issues, safety issues and industry standards.
This manual does not assume any parcular skill level or experience of the reader. AOS does not
accept any liability for incomplete, outdated or incorrect informaon provided in this manual. Improper servicing of water
heaters can result in property damage, bodily injury or death. Do not aempt to service any water heater if you have any
doubt about your ability to do so. Consult a qualied professional.