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 instruc-
tions, 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 B149.1 Installation 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 freezing
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, flam-
mable vapors can be carried some distance from where their liquids
are being used or stored. The open flame of the water heater’s
intermittent 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 proper ty damage. For these reasons,
installation 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 possibility of light-
ing 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 ceiling
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 servicing.
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 adjacent
to it or to lower floors of the structure. When such areas cannot be
avoided, it is recommended that a suitable catch pan, adequately
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 ap-
plicable local codes.
D. RESTAURANTS — If the water heater is to be installed in a res-
taurant 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 and GNU 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, masonry or
metal construction, and there are no other appliances installed
that require an air supply, infiltration air is normally adequate 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 comply 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 rating 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 American
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 B149.1
Installation Codes; under “Venting Systems and Air Supply for
Appliances”. 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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