A.O. Smith 185762-000 - Manual (Page 4)

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Thank You for purchasing this water heater. Properly installed and
maintained, it should give you years of trouble free service.
Abbreviations Found In This Instruction Manual:
• ANSI - American National Standards Institute
• ASME - American Society of Mechanical Engineers
• AHRI - Air Conditioning, Heating and Refrigeration Institute
• NEC - National Electrical Code
• NFPA - National Fire Protection Association
• UL - Underwriters Laboratories Inc.
PREPARING FOR THE INSTALLATION
1. Read the “General Safety” section of this manual fi rst 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,
SERIOUS BODILY INJURY, AND/OR PROPERTY DAMAGE.
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
understand. All warnings and all instructions are essential to the
proper operation of the water heater and your safety. READ THE
ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR
OPERATE THE WATER HEATER.
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 local code requirements
follow NFPA-70, the National Electrical Code (current edition),
which may be ordered from: National Fire Protection Association,
1 Batterymarch Park, Quincy, MA 02269.
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.
4. Carefully plan your intended placement of the water heater.
INSTALLATION OR SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOLVED. PLUMBING
AND ELECTRICAL WORK ARE REQUIRED.
Examine the location to ensure the water heater complies with the
“Facts to Consider About 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 Offi ce of the State
Architect, 1102 Q Street, Suite 5100, Sacramento, CA 95814.
Instructions can also be downloaded to your computer at www.
dsa.dgs.ca.gov/Pubs.
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.
INTRODUCTION
SAFE INSTALLATION, USE AND SERVICE................................................................................................................................................................ 2
GENERAL SAFETY...................................................................................................................................................................................................... 3
INTRODUCTION .......................................................................................................................................................................................................... 4
Preparing for the New Installation ........................................................................................................................................................................ 4
TABLE OF CONTENTS ................................................................................................................................................................................................ 4
TYPICAL INSTALLATION ............................................................................................................................................................................................. 5
MIXING VALVE USAGE ............................................................................................................................................................................................... 6
LOCATING THE NEW WATER HEATER .................................................................................................................................................................. 6-7
Facts to Consider About Location ........................................................................................................................................................................ 6
Insulation Blankets ............................................................................................................................................................................................... 7
INSTALLING THE NEW WATER HEATER .................................................................................................................................................................. 7
Water
Piping ......................................................................................................................................................................................................... 7
Temperature-Pressure Relief Valve ...................................................................................................................................................................... 9
Filling the Water Heater ...................................................................................................................................................................................... 10
T & P Valve and Pipe Insulation (Selected Models) ........................................................................................................................................... 10
WIRING DIAGRAMS ...................................................................................................................................................................................................11
WIRING ...................................................................................................................................................................................................................... 12
TEMPERATURE REGULATION ................................................................................................................................................................................ 13
Temperature
Adjustment .................................................................................................................................................................................... 13
FOR YOUR INFORMATION ....................................................................................................................................................................................... 14
Thermal
Expansion ............................................................................................................................................................................................ 14
Strange Sounds .................................................................................................................................................................................................. 14
Operational Conditions ....................................................................................................................................................................................... 14
Water Odor ......................................................................................................................................................................................................... 14
“Air” in Hot Water Faucets .................................................................................................................................................................................. 14
High Water Temperature Shut Off System ......................................................................................................................................................... 14
PERIODIC MAINTENANCE ....................................................................................................................................................................................... 15
Anode Rod Inspection ........................................................................................................................................................................................ 15
Temperature-Pressure Relief Valve Operation ................................................................................................................................................... 15
Draining .............................................................................................................................................................................................................. 15
Thermostat Removal/Replacement .................................................................................................................................................................... 16
Element Cleaning/Replacement .................................................................................................................................................................... 16-18
Drain Valve Washer Replacement ...................................................................................................................................................................... 18
Service ............................................................................................................................................................................................................... 18
LEAKAGE CHECKPOINTS ........................................................................................................................................................................................ 19
TROUBLESHOOTING GUIDELINES ......................................................................................................................................................................... 20
REPAIR PARTS LIST ............................................................................................................................................................................................ 21-23
TABLE OF CONTENTS