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13
FIGURE 13.
• When communicating with the outdoors through horizontal
ducts, each opening shall have a minimum free area of 1
square inch per 2,000 BTU per hour (11 cm
2
/kW) of total
input rating of all equipment in the enclosure, see
Figure 14.
• When ducts are used, they shall be of the same cross-
sectional area as the free area of the openings to which they
connect. The minimum short side dimension of rectangular
air ducts shall not be less than 3 inches
(76.2 mm), see Figure 14.
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
province 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.