Installing The Water Heater; Required Ability; General; Contaminated Water - A.O. Smith 100 Series Instruction Manual

REQUIRED ABILITY

Installation and service of this water heater requires ability equivalent
to that of a qualified agency (page 2) in the field involved. Plumbing
and electrical work is required.

GENERAL

The installation must conform with these instructions and the local/
national code authority having jurisdiction and the requirements of the
power company. In the absence of local/national codes requirements,
follow NFPA-70 (current edition). In the absence of local/national codes,
the installation must comply with the latest editions of the National
Electrical Code, NFPA 70 or the Canadian Electrical Code CSA C22.1. The
National Electrical Code may be ordered from: National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269. The Canadian
Electrical Code is available from the Canadian Standards Association,
8501 East Pleasant Valley Road, Cleveland, OH 44131.
Particular attention should be given to the installation of thermometers
at the locations indicated in the diagrams as these are necessary for
checking the operation of the heater.
Be sure to turn off power when working on or near the electrical
system of the heater. Never touch electrical components with wet
hands or when standing in water. When replacing fuses always use
the correct size for the circuit. See Electrical (page 14). DO NOT
test electrical system before heater is filled with water. See Electrical
(page 14) for the correct procedure.
The principal components of the heater are identified in Features and
Components (page 7).
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or shower-
ing.
Temperature limiting devices such as
thermostatic point-of-use mixing
valves must be installed when
required by codes and to ensure safe
temperatures at fixtures.
MIXING VALVE USAGE:
Water heaters are intended to produce hot water. Water heated to
a temperature which will satisfy space heating, clothes washing,
dish washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more likely to
be permanently injured by hot water than others. These include the
elderly, children, the infirm, or physically/developmentally disabled.
If anyone using hot water in your home fits into one of these groups
or if there is a local/national code or state law requiring a maximum
water temperature at the hot water tap, then you must take special
precautions.
In addition to using the lowest possible temperature setting that
satisfies your hot water needs, a means such as a MIXING VALVE,
should be used at the hot water taps used by these people or at
the water heater.
MIXING VALVES: for reducing point of use temperature are
available. Consult a qualified installer or service agency. Follow all
manufacturer's Instructions for installation of these valves. Before
changing the factory setting on the thermostat, read the "Temperature
Regulation" section in this manual.

INSTALLING THE WATER HEATER

INSTALLING THE WATER HEATER
Table 3. Burn Time at Various Temperatures
Water
Temperature 1st Degree Burn
°F (°C) (Less Severe Burns)
110 (43) (normal shower temp.)
116 (47) (pain threshold)
116 (47)
122 (50)
131 (55)
140 (60)
149 (65)
154 (68)
(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,
1978)
WARNING
Toxic Chemical Hazard
● Do not connect to non-potable water system.

CONTAMINATED WATER

This water heater shall not be connected to any heating system(s)
or component(s) used with a non-potable water heating appliance.
Toxic chemicals, such as those used for boiler treatment shall not
be introduced into this system.

CIRCULATING PUMP

Field installed circulating pumps should be of all bronze construction.

INSULATION BLANKETS

Insulation blankets are available to the general public for external
use on electric water heaters but are not necessary with this product.
The purpose of an insulation blanket is to reduce the standby heat
loss encountered with storage tank heaters. Your water heater meets
or exceeds the EPACT and ASHRAE/IES 90.1 standards with respect
to insulation and standby loss requirements, making an insulation
blanket unnecessary.
Should you choose to apply an insulation blanket to this heater,
you should follow these instructions below. Failure to follow these
instructions can result in fire, serious personal injury, or death.
• Do not cover the temperature and pressure relief (T & P)
valve with an insulation blanket.
• Do not cover the instruction manual. Keep it on the side of
the water heater or nearby for future reference.
• Do obtain new warning and instruction labels for placement
on the blanket directly over the existing labels.
12
Time for
Time for Permanent Burns
2nd & 3rd Degree
(Most Severe Burns)
35 minutes 45 minutes
1 minute 5 minutes
5 seconds 25 seconds
2 seconds 5 seconds
1 second 2 seconds
instantaneous 1 second