Rheem 40 Gallon User Manual

AP16801 (04/13)
FOR YOUR SAFETY!
— Do not store or use gasoline or other
flammable vapors or liquids or other
combustible materials in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
— 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 building.
● Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
● If you cannot reach your gas supplier, call
the fire department.
● Do not return to your home until authorized
by the gas supplier or fire department.
— Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury, or death. Refer to
this manual. Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.
WARNING: If the information in these instructions is not followed exactly,
a fire or explosion may result causing property damage, personal injury or death.
The purpose of this manual is twofold: one, to provide the installer with the basic directions
and recommendations for the proper installation and adjustment of the water heater; and two,
for the owner–operator, to explain the features, operation, safety precautions, maintenance and
troubleshooting of the water heater. This manual also includes a parts list.
It is imperative that all persons who are expected to install, operate or adjust this water heater
read the instructions carefully so they may understand how to perform these operations. If you
do not understand these instructions or any terms within it, seek professional advice.
Any questions regarding the operation, maintenance, service or warranty of this water heater
should be directed to the seller from whom it was purchased. If additional information is
required, refer to the section on “If you need service.”
Do not destroy this manual. Please read carefully and keep in a safe place for future
reference.
Recognize this symbol as an indication of Important Safety Information!
California Proposition 65 Warning: This product contains chemicals known to the
State of California to cause cancer, birth defects or other reproductive harm.
Residential 30, 38, 40, 50 and 60 Gallon with Electronic Control
Use & Care Manual
With Installation Instructions for the Installer
Printed in USA
Water Heaters
Residential Gas - FVIR Certified
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WARNING: This water heater is not suitable
for use in manufactured (mobile) homes!
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Rheem 40 Gallon Specifications

General

Brand	Rheem
Model	40 Gallon
Category	Water Heater
Language	English

Summary

Introduction and Manual Overview

Product and Manual Introduction

Introduces the water heater models and explains the purpose and structure of the Use & Care Manual.

General Safety Warnings and Precautions

Highlights initial critical warnings regarding mobile home suitability, flammable vapors, and gas safety.

Important Safety Information

Dangers of Gas and Flammables

Details risks associated with flammable materials, gas leaks, and improper venting for fire/explosion prevention.

Water Temperature and Scald Prevention

Explains severe burn risks from high water temperatures and guides on setting controls for safety.

LP and Natural Gas Safety Protocols

Covers safety for LP and natural gas models, including leak detection and conversion warnings.

California Installation and General Safety

Addresses California bracing laws and lists essential safety precautions for operation and installation.

Water Heater Installation

Location and Clearance Requirements

Details proper placement, clearances to combustibles, and alcove/closet installation rules.

Combustion and Ventilation Air

Explains air supply needs for combustion and ventilation, especially in confined spaces and corrosive atmospheres.

Water Supply Connections and Thermal Expansion

Addresses thermal expansion issues and typical water supply connection methods, including check valves.

Gas Supply, Leak Testing, and Altitude

Details gas supply requirements, leak testing procedures, and considerations for high altitude installations.

Venting, Insulation, and Heat Traps

Covers vent connector installation, insulation blankets, and heat traps for proper function and energy efficiency.

Lighting and Operating the Water Heater

Pilot Burner Ignition Procedure

Step-by-step instructions for safely lighting the pilot burner using the piezo-electric ignition system.

Operational Safety and Temperature Settings

Guides on safe operation, temperature setting for scald prevention, and energy conservation.

Temperature Marks and Stacking Phenomenon

Explains reference marks for water temperature and the phenomenon of water stacking or layering.

Care, Cleaning, and Maintenance

Draining and Preventative Maintenance

Provides instructions for draining the tank and recommends periodic inspection of key components.

Venting System and Burner Inspection

Details how to inspect the venting system and burners for proper function and safety.

Anode Rod and Housekeeping

Explains anode rod maintenance for tank protection and emphasizes keeping the area clean.

Troubleshooting and Service

Troubleshooting Common Operational Issues

Helps diagnose and resolve common problems like condensation, flame issues, and pilot light failures.

Status Light Code Interpretation

Explains the meaning of status light codes for diagnosing gas control issues and provides solutions.

Contacting for Professional Service

Provides contact information and required details for obtaining manufacturer service and support.