A.O. Smith DVE-150, DHE-200 User Manual
Instruction Manual
COMMERCIAL ELECTRIC WATER HEATERS
MODELS DVE-150 THRU DVE-10000
DHE-200 THRU DHE 10000
INSTALLATION - OPERATION - SERVICE -
MAINTENANCE - LIMITED WARRANTY
A DIVISION OF A.O. SMITH CORPORATION
RENTON, WASHINGTON
ASME
Thank you for buying this energy efcient water
heater from A.O. Smith Water Products Company. We
appreciate your condence in our products.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
PRINTED IN THE U.S.A 1207 09063340-000
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SAFE INSTALLATION, USE, AND SERVICE
The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others.
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 hazardous
DANGER
WARNING
CAUTION
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 used without the safety alert
CAUTION
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.
symbol indicates a potentially hazardous
situation which, if not avoided, could result
in property damage.
IMPORTANT DEFINITIONS
•
Installation and service of this water heater requires ability equivalent to that of a Qualied Agency (as dened by ANSI below) in the eld
involved. Installation skills such as plumbing, air supply, venting, gas supply, electrical supply are required in addition to electrical testing
skills when performing service.
•
“Qualied Agency” - “Any individual, rm, corporation or company that either in person or through a representative is engaged in and is
responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation, testing, repair or servicing of
appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and that has complied with all
the requirements of the authority having jurisdiction.”
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GENERAL SAFETY
When servicing this unit, verify the power to the unit is turned off prior to opening the control cabinet door.
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TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE............................2
GENERAL SAFETY..................................................................3
TABLE OF CONTENTS ............................................................4
INTRODUCTION ......................................................................4
Preparing for the New Installation .....................................4
DIMENSIONS AND CAPACITIES DATA ..................................5
FEATURES AND COMPONENTS ....................................... 6-7
LOCATING THE NEW WATER HEATER .................................8
INSTALLATION ........................................................................8
Required Ability .................................................................8
General .............................................................................8
Mixing Valve Usage ..........................................................8
Chemical Vapor Corrosion ................................................8
Circulating Pump...............................................................9
Insulation Blankets ............................................................9
Temperature-Pressure Relief Valve ..................................9
ELECTRICAL .........................................................................10
General ...........................................................................10
Branch Circuit .................................................................10
Heater Circuits ................................................................10
Control Circuits ...............................................................10
Power Circuits .................................................................10
ELECTRICAL AND RECOVERIES DATA ............................... 11
WIRING DIAGRAMS ........................................................ 12-13
OPERATION ...........................................................................14
General ...........................................................................14
Filling the Water Heater ..................................................14
Start Up ...........................................................................14
Draining the Water Heater ..............................................14
TEMPERATURE REGULATION ............................................14
Temperature Adjustment .................................................15
High Termperature Devices ............................................15
MAINTENANCE .....................................................................15
General ...........................................................................15
Temperature-Pressure Relief Valve Operation ......... 15-16
Flushing ..........................................................................16
Sediment Removal..........................................................16
Water and LIme Scale Removal .....................................16
Strange Sounds ........................................................ 16-17
TROUBLESHOOTING CHECKLIST ......................................17
Not Enough or No Water .................................................17
Water Is Too Hot .............................................................17
Water Heater Makes Strange Sounds ............................17
Leakage Checkpoints .....................................................17
If You Cannot Identify or Correct the Source of Malfunction ........... 17
WARRANTY ...........................................................................18
NOTES ...................................................................................19
INTRODUCTION
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
• GAMA - Gas Appliance Manufacturer’s Association
• NEC - National Electrical Code
• NFPA - National Fire Protection Association
• UL - Underwriters Laboratory
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 may not operate safely. 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 be aware
of. 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 code requirements, follow
NFPA-70 (current edition). The National Electrical Code 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, contact A.O. Smith
Water Products Customer Care Center at 1-800-527-1953.
A sample rating plate
manual.
number and item
4. Carefully plan your intended placement of the water heater.
Examine the location to ensure the water heater complies with
the “Locating the New Water Heater” section in this manual.
INSTALLATION AND SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN OR QUALIFIED AGENCY (Page 2) IN THE
FIELD INVOLVED. PLUMBING AND ELECTRICAL WORK ARE
REQUIRED.
5. For installation in California this water heater must be braced or
anchored to avoid falling or moving during an earthquake. See
instructions for correct installation procedures. Instructions may
be obtained from California Ofce of the State Architect, 1102 Q
Street, Suite 5100, Sacramento, CA 95811.
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.
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In order to expedite your request, please have the serial
and barcode tag are shown on page 3 of this
ID from the barcode tag available for the technician.
DIMENSIONS AND CAPACITIES DATA
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FEATURES AND COMPONENTS
Your actual conguration may vary.
DVE
Vertical Water Heater (typical).
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