Instructions / Assembly
4
Read and Review this entire Manual with special emphasis on the
Draft Hood and Venting Sections (Page 5) and Operation Section
(Pages 8 - 11) prior to any installation work
LOCAL INSTALLATION REGULATIONS
This water heater must be installed in accordance with these in-
structions, local codes, utility company requirements and/or, in the
absence of local codes, the latest edition of the National Fuel Gas
Code, ANSI Z223.1 in the United States, or CGA/CAN B149 Instal-
lation Codes in Canada.
LOCATION
A. The water heater should be installed in a clean, dry location as
close as practical to the gas vent or chimney. Long hot water lines
should be insulated to conserve water and energy. The water
heater and water lines should be protected from exposure to freez-
ing temperatures.
B. A gas fired water heater should not be installed in a space where
liquids which give off flammable vapors are to be used or stored.
Such liquids include gasoline, LP gas (butane and propane), paint
or adhesives and their thinners, solvents or removers. Because of
natural air movement in a room or other enclosed space, flammable
vapors can be carried some distance from where their liquids are
being used or stored. The open flame of the water heater’s inter-
mittent pilot or main burner can ignite these vapors causing an
explosion or fire which may result in severe burns or death to those
in range, as well as property damage. For these reasons, instal-
lation of a gas fired water heater in a garage is not desirable.
If a location in a garage is the only alternative, the gas water heater
should be installed so that the open flame of the pilot and main
burner are no less than 18 inches above the garage floor. The
water heater must be located or protected so it is not subject to
physical damage by moving vehicles or area flooding. Raising the
gas fired water heater will reduce BUT NOT eliminate the possibili-
ty of lighting the vapor of any flammable liquids which may be
improperly stored or accidentally spilled.
C. All models are certified for installation on combustible floors and
in alcoves. The minimum side and top clearance to walls and ceil-
ing for providing protection of combustible materials are shown
on the water heater’s rating label. A front clearance of 18 inches
(46 cm) should be provided for adequate inspection and servic-
ing.
If the water heater must be installed on carpeting, place a metal
or wood panel beneath water heater extending beyond its full width
and depth at least 3 inches (7.6 cm) in all directions. If the water
heater is installed in an alcove, the entire floor must be covered
by the panel.
The water heater should not be located in an area where leakage
of the tank or connections will result in damage to the area adja-
cent to it or to lower floors of the structure. When such areas can-
not be avoided, it is recommended that a suitable catch pan, ade-
quately drained, be installed under the water heater. The pan
MUST NOT restrict the flow of combustion air flow to bottom of
water heater.
NOTE: Auxiliary catch pan installation MUST conform to the
applicable local codes.
D. RESTAURANTS — If the water heater is to be installed in a restau-
rant or other location where the floor is frequently cleaned, it must
be elevated to provide at least six inches (15 cm) of clearance
from the floor to comply with NSF International recommendations.
A factory-designed leg extension kit is available for this purpose
from the distributor or store where the water heater was purchased.
(Currently unavailable for GX90 models)
E. COMBUSTION & VENTILATION AIR —Proper operation of the
water heater requires air for combustion and ventilation. If the
water heater is installed in a building of conventional frame, ma-
sonry or metal construction, and there are no other appliances
installed that require an air supply, infiltration air is normally ad-
equate for proper combustion and ventilation, and an outside air
supply for the water heater may not be required. However, if the
water heater is installed in a confined space, or the building is of
unusually tight construction, then an outside air supply must be
provided. Provisions for Combustion and Ventilation air must com-
ply with the applicable codes and standards as defined in the Local
Installation Regulations section on page 4.
FOR INSTALLATIONS IN THE UNITED STATES:
If the water heater is to be installed in a confined space, defined
as one having a volume of less that 50 cubic feet (1.4 cu. meters)
per 1000 Btu/h of the total input of all appliances within that space,
an air supply must be provided. The air must be supplied through
two permanent openings of equal area, one of which is to be located
approximately 12 inches (30cm) above the floor and the other of
which is to be located approximately 12 inches (30cm) below the
ceiling. The minimum net free area of each opening must be not
less than one square inch per 1000 Btu/h of the total input of all the
appliances in the enclosure or structure, if each of the openings
communicates with other unconfined areas inside the structure.
If the required air is to be supplied directly from outdoors (or a
freely ventilated attic or crawl space), or through vertical ducts,
there must be two openings located as specified above, and each
must have a minimum net free area of not less than one square
inch (6.5 sq. cm) per 4,000 Btu/h of the total input rating of all ap-
pliances in the en-closure.
If horizontal ducts are used to communicate with the outdoors,
each opening must have a minimum net free area of not less than
one square inch (6.5 sq. cm) per 2000 Btu/h of the total input rat-
ing of all appliances in the en-closure.
NOTE: If the openings are to be covered with a protective
screen or grill, the net free area of the covering material must
be used in determining the size of the openings mentioned
above. Protective screening for the openings MUST NOT be
smaller than
1
/4 inch (.64 cm) mesh to resist clogging by lint
or other debris.
For additional information regarding combustion and ventilation
air supply requirements, refer to the latest edition of the Ameri-
can National Standard / National Fuel Gas Code, ANSI Z223.1
FOR INSTALLATIONS IN CANADA:
While the requirements for U.S. installations outlined above are
generally true in Canada, precise requirements for combustion
and ventilation air supplies are detailed in the CAN/CGA B149 In-
stallation Codes; under “Venting Systems and Air Supply for Ap-
pliances”. To ensure that the water heater is properly installed,
those requirements must be followed.
Introduction
WARNING
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WARNING
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CAUTION
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