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7
Combustion Air Inlet
Openings
Installing the water heater
This water heater must be installed in accordance with these instructions, local codes, utility company
requirements, and/or in the absence of local codes, use the latest edition of the American National
Standard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association,
400 N. Capitol Street NW, Washington, DC 20001 as ANSI standard Z223.1 or National Fire Protection
Association, 1 Batterymarch Park, Quincy, MA 02269 as booklet NFPA 54.
Location
The water heater should not be located in
an area where leakage from the tank or
connections will result in damage to the area
adjacent to the heater or to lower floors of the
structure.
When such areas cannot be avoided it is
recommended that a suitable drain pan,
adequately drained, must be installed under the
water heater.
The water heater must be centered in the drain
pan.
The drain pan must not restrict air flow to the
combustion air inlet openings (perforation
openings) located around the lower perimeter
of the water heater.
Drain pan kits are available from the store
where the water heater was purchased, or any
water heater distributor.
Make certain the floor underneath the water
heater is strong enough to sufficiently support
the weight of the water heater once it is filled
with water.
A gas fired water heater or any other appliance
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 or propane), paint or adhesives
and their thinners, solvents or removers.
DO NOT block or obstruct any of the
combustion air inlet openings located around
the perimeter of the water heater. A minimum
of 1 in. is required between these combustion
air inlet openings and any obstruction.
DO NOT obstruct or block the Flammable
Vapor Sensor.
Because of natural air movement in a room
or other enclosed space, flammable vapors
can be carried some distance from where
liquids which give off flammable vapors are
to be used or stored. The open flame of the
water heater’s main burner can ignite these
vapors and create a shutdown condition of
the water heater which will not allow the
water heater to ignite until examined by a
Qualified Service Technician.
FVIR certified gas water heaters can be
installed on a residential garage floor without
the use of an 18-inch stand in accordance with
the National Fuel Gas Code, NFPA 54, ANSI
Z223.1, unless otherwise directed by State and
Local code requirements. The water heater
must be located so it is not subject to physical
damage, for example, by moving vehicles, area
flooding, etc.
● We recommend this water heater be
installed in locations where the ambient
temperatures DO NOT exceed 100°F
(38°C).
IMPORTANT: DO NOT install the
water heater in a location where it may
be subjected to ambient temperatures
exceeding 125°F (52°C).
● The water heater should be installed so as
to minimize the length of plastic vent pipe
and the number of vent connection fittings
required. See the "Venting Section" for vent
system requirements.
● 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.
● DO NOT install the water heater in
bathrooms, bedrooms, any occupied rooms
normally kept closed, or in unprotected
outdoor areas.
● Minimum clearance from combustible
construction:
* "Front" Clearance dimension is measured
from the water heater jacket to the closet door.
** "Top" clearance dimension is measured
from the jacket top of the water heater to the
ceiling.
If the clearances stated on the Instruction/
Warning Label, located on the front of the
heater differ, install the water heater according
to the clearances stated on the label.
● If the water heater is installed in an alcove
or closet, the entire floor must be covered
by a wood or metal panel.
A minimum of 24 in. clearance from
the front and top should be available for
adequate inspection and servicing.
● The water heater may be installed on
combustible floors, but not directly on
carpeting. If the water heater must be
installed on carpeting, place a metal or wood
panel beneath the water heater, extending
beyond its full width and depth at least 3 in.
in all directions.
NOTICE: For proper operation and
maintenance, a minimum clearance of 1.5
in. must be provided from the combination
temperature and pressure relief valve to any
wall or object.
The auxiliary drain pan
installation MUST conform
to local codes.
Diameter of
water heater
plus 2” min.
Max.
2.75”
!
WARNING: Combustible
construction refers to
adjacent walls and ceilings
and should not be confused
with combustible or
flammable products and
materials. Combustible
and/or flammable products
and materials should never
be stored in the vicinity of
this or any gas appliance.
Front* Sides Rear Top**
3” 1” 0” 12”
NOTICE: DO NOT
allow the flammable
vapor sensor to become
submerged in water.
Make sure the drain pan
is properly drained.
Flammable
Vapor
Sensor
NOTICE: DO NOT allow
the drain pan to obstruct
the flammable vapor
sensor.
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