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OUTLET AIR DUCT
satisfies your hot water needs, a means such as a *mixing
valve, shall be used at the hot water taps used by these people
or at the water heater. Mixing valves are available at plumbing
supply or hardware stores. See Figure 14. Valves for reducing
point of use temperature by mixing cold and hot water are also
available. Follow manufacturer's instructions for installation
of the valves. Before changing the factory setting on the
thermostat, read the Temperature Regulation section in this
manual.
FIGURE 13.
Louvers and Grilles: In calculating free area, consideration
shall be given to the blocking effect of louvers, grilles or
screens protecting openings. Screens used shall not be
smaller than 1/4 inch (6.4 mm) mesh. If the free area through
a design of louver or grille is known, it should be used in
calculating the size opening required to provide the free
area specified. If the design and free area is not known, it
may be assumed that wood louvers will be 20=25 percent
free area and metal louvers and grilles will have 60=75
percent free area. Louvers and grilles shall be fixed in the
open position or interlocked with the equipment so that they
are opened automatically during equipment operation.
Special Conditions Created by Mechanical Exhausting or
Fireplaces: operation of exhaust fans, ventilation systems,
clothes dryers or fireplaces may create conditions requiring
special attention to avoid unsatisfactory operation of installed
gas utilization equipment.
Water Piping
Water temperature over 125°F
(52°0) can cause severe burns
instantly resulting in severe injury
or death.
Children, elderly, and the
physically or mentally disabled
are at highest riskfor scald injury,
Feel water before bathing or
showering
Temperature limiting valves are
available,
Read instruction manual for safe
temperature setting.
HOTTER WATER CAN SCALD:
VVater 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/mentally handicapped. If anyone using hot water in
your home fits into one of these groups or if there is a local
code or state law requiring a certain temperature water at the
hot water tap, then you must take special precautions. In
addition to using the lowest possible temperature setting that
*UlXING HOT WATER
VALV _= OUTLET ON
WATER HEATER
WATER HEATER
FIGURE14.
Toxic Chemicam Hazard
, Do not connect to non-potable water system.
12
This water heater shall not be connected to any heating systems
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.
Water supply systems may, because of such events as high
line pressure, frequent cut-offs or the effects of water hammer
have installed devices such as pressure reducing valves, check
valves, back flow preventers, etc. to control these types of
problems. When these devices are not equipped with an
internal by=pass, and no other measures are taken, the devices
cause the water system to be closed. As water is heated, it
expands (thermal expansion) and closed systems do not allow
for the expansion of heated water.
The water within the water heater tank expands as it is heated
and increases the pressure of the water system. If the relieving
point of the water heater's temperature-pressure relief valve is
reached, the valve will relieve the excess pressure. The
temperatureopressure relief valve is not intended for the
constant relief of thermal expansion. This is an unacceptable
condition and must be corrected. It is recommended that any
devices installed which could create a closed system have a
by-pass and/or the system have an expansion tank to relieve
the pressure built by thermal expansion in the water system.
Refer to the Thermal Expansion section under Troubleshooting
Guide or contact !ocal plumbing authority or local Sears Service
Center on how to control this situation.
NOTE: To protect against untimely corrosion of hot and coJd
water fittings, it is strongly recommended that dioelectric
unions or couplings be installed on this water heater when
connected to copper pipe.
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