AO Smith Electric Heater WATER HEATERS User Guide

Instruction Manual  
RESIDENTIAL ELECTRIC  
WATER HEATERS  
ATER  
ONLY  
E FOR  
ATING  
LISTED  
GAMA certification applies to all  
residential electric water heaters  
with capacities of 20 to 120 gallons.  
Input rating of 12 Kw or less.  
ALLTECHNICALAND WARRANTY QUESTIONS: SHOULD BE DIRECTEDTOTHE LOCALDEALER FROM WHOM THE WATER HEATER WAS  
PURCHASED.IFYOUAREUNSUCCESSFUL,PLEASEWRITETOTHECOMPANYLISTEDONTHERATINGPLATEONTHEWATERHEATER.  
KEEPTHIS MANUALIN THE POCKET ON HEATER FOR FUTURE REFERENCE  
WHEN EVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.  
PRINTED IN THE U.S.A 1203  
PART NO. 184639-000  
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SAFE INSTALLATION, USE AND SERVICE  
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.  
Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and  
others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very  
important that the meaning of each safety message is understood by you and others who install, use or service this water heater.  
This is the safety alert symbol. It is used to alert you  
to potential personal injury hazards. Obey all safety  
messages that follow this symbol to avoid possible  
injury or death.  
DANGER indicates an imminently  
DANGER  
WARNING  
hazardous situation which, if not avoided,  
could result in death or injury.  
WARNING indicates a potentially hazardous  
situation which, if not avoided, could result  
in death or injury.  
CAUTION indicates a potentially hazardous  
situation which, if not avoided, may result  
in minor or moderate injury.  
CAUTION  
CAUTION  
CAUTION used without the safety alert  
symbol indicates a potentially hazardous  
situation which, if not avoided, could result  
in property damage.  
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message and  
how to avoid the risk of injury.  
IMPORTANT DEFINITIONS  
Qualified Installer: A qualified installer must have ability equivalent to a licensed tradesman in the fields of plumbing, and electrical installation  
of these appliances. This would include a thorough understanding of the requirements of the National Electrical Code and applicable local  
electrical and plumbing codes (and tools necessary to confirm proper installation and operation of the water heater) as they relate to  
the installation of electric water heaters. The qualified installer must have a thorough understanding of the water heater  
Instruction Manual.  
Service Agency: A service agency also must have ability equivalent to a licensed tradesman in the fields of plumbing, and electrical installation  
of these appliances. This would include a thorough understanding of the requirements of the National Electrical Code and applicable local  
electrical and plumbing codes (and tools necessary to confirm proper installation and operation of the water heater) as they relate to  
the installation of electric water heaters. The service agency must have a thorough understanding of the water heater  
Instruction Manual.  
2
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GENERAL SAFETY  
TABLE OF CONTENTS  
SAFE INSTALLATION, USEAND SERVICE .............................. 2  
TemperatureAdjustment ................................................ 11  
FORYOUR INFORMATION ..................................................... 12  
Thermal Expansion ......................................................... 12  
Strange Sounds ............................................................. 12  
Operational Conditions ................................................... 12  
Smelly Water .................................................................. 12  
“Air” in Hot Water Faucets............................................. 12  
High Water Temperature Shut Off System .................... 12  
PERIODICMAINTENANCE ....................................................... 12  
Anode Rod Inspection .............................................. 12-13  
Temperature-Pressure Relief Valve Operation .............. 13  
Draining .......................................................................... 13  
Drain Valve Washer Replacement ................................. 13  
Service ........................................................................... 13  
LEAKAGECHECKPOINTS ...................................................... 14  
REPAIR PARTS LIST ............................................................... 15  
TROUBLESHOOTING .............................................................. 16  
WARRANTY ..................................................................... Insert  
GENERAL SAFETY .................................................................. 3  
TABLE OF CONTENTS .............................................................. 3  
INTRODUCTION ........................................................................ 4  
Preparing for the New Installation ................................... 4  
NOTES ...................................................................................... 4  
TYPICALINSTALLATION .......................................................... 5  
WIRINGDIAGRAMS .................................................................. 6  
MIXING VALVE USAGE ............................................................ 7  
LOCATINGTHE NEW WATER HEATER ..................................... 8  
Facts to Consider About Location ................................... 8  
Insulation Blankets ........................................................... 8  
INSTALLING THE NEW WATER HEATER .................................. 8  
Water Piping ................................................................. 8-9  
Temperature-Pressure Relief Valve........................... 9-10  
Filling the Water Heater .................................................. 10  
T&P Valve and Pipe Insulation (Selected Models) ......... 10  
TEMPERATUREREGULATION ................................................ 11  
3
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INTRODUCTION  
Thank You for purchasing this water heater. Properly installed and  
maintained, it should give you years of trouble free service.  
2. The installation must conform with these instructions and the local  
code authority having jurisdiction and the requirements of the power  
company. In the absence of code requirements follow NFPA-70  
(latest edition). The National Electric Code which may be ordered  
from: National Fire Protection Association, 1 Batterymarch Park,  
Quincy, MA02269.  
Abbreviations Found In This Instruction Manual:  
ANSI -American National Standards Institute  
ASME -American Society of Mechanical Engineers  
GAMA- GasAppliance Manufacturer’sAssociation  
NEC - National Electric Code  
3. If after reading this manual you have any questions or do not  
understand any portion of the instructions, call the local utility or the  
manufacturer whose name appears on the rating plate.  
NFPA- National Fire ProtectionAssociation  
UL - Underwriters Laboratory  
4. Carefully plan the place where you are going to put the water heater.  
INSTALLATIONORSERVICEOFTHISWATERHEATERREQUIRES  
ABILITYEQUIVALENTTOTHATOFALICENSEDTRADESMAN IN  
THE FIELD INVOLVED. PLUMBINGAND ELECTRICALWORKARE  
REQUIRED.  
PREPARING FOR THE INSTALLATION  
1. Read the “General Safety” section of this manual first and then the  
entire manual carefully. If you don’t follow the safety rules, the  
water heater will not operate properly. It could cause DEATH,  
SERIOUSBODILYINJURYAND/ORPROPERTYDAMAGE.  
Examine the location to ensure the water heater complies with the  
“Facts to ConsiderAbout the Location” section in this manual.  
5. For California installation this water heater must be braced, anchored,  
or strapped to avoid falling or moving during an earthquake. See  
instructions for correct installation procedures. Instructions may be  
obtained from California Office of the StateArchitect, 400 P Street,  
Sacramento, CA 95814.  
This manual contains instructions for the installation, operation, and  
maintenance of the electric water heater. It also contains warnings  
throughout the manual that you must read and be aware of. All  
warnings and all instructions are essential to the proper operation of  
the water heater and your safety. Since we cannot put everything  
on the first few pages, READ THE ENTIRE MANUAL BEFORE  
ATTEMPTING TO INSTALL OROPERATE THE WATER HEATER.  
6. Massachusetts Code requires this water heater to be installed in  
accordance with Massachusetts 248-CMR 2.00: State Plumbing Code  
and 248-CMR 5.00.  
NOTES  
4
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TYPICAL INSTALLATION  
LOWBOYS  
UPRIGHTS  
COMPACTS  
TABLE TOPS  
INSTALL SUITABLE DRAIN PANS UNDER HEATERS  
TO PREVENT DAMAGE DUE TO LEAKAGE. REFER  
TO WATER HEATER LOCATION ON PAGE 8.  
INSTALL VACUUM RELIEF IN COLD WATER  
INLET LINE AS REQUIRED BY LOCAL CODES.  
INSTALL THERMAL EXPANSION TANK OR DEVICE  
IF WATER HEATER IS INSTALLED IN A CLOSED  
WATER SYSTEM.  
FIGURE1.  
5
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