13
FIGURE 14.
•
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
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated
to a temperature which will satisfy , 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 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 8 on page 9 and Figure 15 below. Valves for
reducing point of use temperature by mixing cold and hot water
are also available.
Consult Maytag Customer Service (1-800-
788-8899)
. 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 15.
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, the effects of water hammer
among others, 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
temperature-pressure 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 local plumbing authority or
call Maytag
Customer Service at 1-800-788-8899 for an authorized
installer on how to control this situation.
