A.O. Smith DSE-120-24, Description, Operation, Installation And Maintenance Manual

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5
GENERAL SAFETY
INFORMATION
INSULATION BLANKETS
Insulation blankets available to the general public for external
use on electric water heaters are not approved for use on your
A.O. Smith water heater. The purpose of an insulation blanket
is to reduce the standby heat loss encountered with storage tank
water heaters. Your A.O. Smith water heater meets or exceeds
the National Appliance Energy Conservation Act standards with
respect to insulation and standby loss requirements, making
an insulation blanket unnecessary.
WARNING
Should you choose to apply an insulation blanket to this heater,
you should follow these instructions (See Figure 1 for
identification of components mentioned below). Failure to follow
these instructions can result in fire, asphyxiation, serious
personal injury or death.
1. DO NOT COVER THE JUNCTION BOX EXTERNAL WIRING,
THERMOSTATS OR HEATING ELEMENTS ON ELECTRIC
WATER HEATER.
2. DO NOT COVER THE TEMPERATURE-PRESSURE RELIEF
VALVE.
3. DO NOT COVER OPERATING INSTRUCTIONS,
INSTALLATION OR SAFETY RELATED LABELS.
.
4.
DO OBTAIN NEW WARNING AND INSTRUCTION LABELS
FROM A.O. SMITH FOR PLACEMENT ON THE BLANKET
DIRECTLY OVER THE EXISTING LABELS.
5. WATER AND/OR CONDENSATE CAN COLLECT IN AN
INSULATION BLANKET. A.O. SMITH WILL NOT BE LIABLE
FOR ANY RUST OR CORROSION DAMAGE CAUSED BY
THE INSTALLATION OF INSULATION BLANKETS.
WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT
IN SERIOUS PERSONAL INJURY OR DEATH.
EXTERNAL DAMAGE
Do not operate the water heater until it has been fully checked
out by a qualified service technician, if the water heater:
• Has been exposed to fire or damage.
• Produces steam or unusually hot water.
If the water heater has been subject to flooding, it must be
replaced.
INSTALLATION
REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOLVED. PLUMBING AND
ELECTRICAL WORK INVOLVED.
GENERAL
The installation must conform to these instructions and the local
code authority having jurisdiction. Grounding and electrical
wiring connected to the water heater must also conform to the
latest version of the NATIONAL ELECTRICAL CODE and NFPA-
70. Copies of these codes may be obtained from American
National Standards Institute, 1430 Broadway, New York, NY
10018.
If your location requires the installation of the water heater to
comply with National Sanitation Foundation requirements, the
heater must be sealed to the floor so as to prevent seepage
underneath the heater. The following are recommended
sealants that may be used on all types of flooring except
concrete: GE Silicone Seal RTV-120, 103, 108 and 109.
DO NOT TEST ELECTRICAL SYSTEM BEFORE HEATER IS
FILLED WITH WATER, FOLLOW START UP PROCEDURE AS
WRITTEN IN “OPERATION” SECTION OF THIS MANUAL.
The principal components of the heater are identified in figure
1. The model and rating plate on page 3 interprets certain
markings into useful information. Both of these references
should be used to identify the heater, its components and
optional equipment.
LOCATION
For proper installation, the heater should be installed on a level
surface.
LOCATE IT NEAR A FLOOR DRAIN. THE HEATER SHOULD BE
LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER
OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE
ADJACENT AREA OR TO LOWER FLOORS OF THE
STRUCTURE.
WHEN SUCH LOCATIONS CANNOT BE AVOIDED, A SUITABLE
DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER.
Such pans should be fabricated with sides at least 2” deep,
with length and width at least 2” greater than the diameter of the
heater and must be piped to an adequate drain. Drain pans
suitable for these heaters are available from your distributor or
A.O. Smith Water Products Company, Product Service Division,
5621 W. 115th St., Alsip, IL 60803.
Locate the heater close to the point of major hot water usage
and the power supply.
• Try to make hot water piping and branch circuit wiring
as short as possible.
• Insulate hot and cold water piping where heat loss
and condensation may be a problem.
THE HEATER SHOULD NOT BE LOCATED IN AN AREA WHERE
IT WILL BE SUBJECT TO FREEZING.
Suggested clearances from adjacent surfaces are 18 inches in
front for access to the controls and elements and 12 inches from
top. The heater may be installed on or against combustible
surfaces.
CONNECTIONS
The heater water inlet is located on the side of the heater near
the bottom. The heater outlet is located at the top of the heater.
Piping and wiring diagrams are included in this manual.