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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 catch pan,
adequately drained, must be installed
under the water heater.
The pan must not restrict air flow to the
combustion air inlet openings (perforation
openings) located around the lower
perimeter of the water heater.
Catch 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.
When installed in a closet, DO NOT
block or obstruct any of the combustion
air inlet openings located around the
perimeter of the water heater. A
minimum of 1” 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 pilot or main burner can
ignite these vapors and create a shut down
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 2006, 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
● The water heater should be installed
as close as practical to the gas vent or
chimney.
● 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 this water heater in
bathrooms, bedrooms, any occupied
rooms normally kept closed, or in
unprotected outdoor areas.
● Minimum clearance from combustible
construction:
● 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 to be installed
directly on carpeting , the water heater
shall be installed on a metal or wood
panel extending beyond the full width
and depth of the water heater by at least
3 in. (7.6 cm) in all directions or, if
the water heater is to be installed in an
alcove or closet, the entire floor must be
covered by a wood or metal panel.
The auxiliary catch pan
installation MUST conform
to local codes.
Diameter of
water heater
plus 2” min.
Max.
2”
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.
Location Front Sides Rear Top
Alcove
3”
(7.62 cm)
0”
(0 cm)
0”
(0 cm)
12”
(30.5 cm)
Closet
3”
(7.62 cm)
1”
(2.5 cm)
0”
(0 cm)
12”
(30.5 cm)
Rear
Sides
Front Open
Sides
Front Enclosed
Top View Closet
Top View Alcove
Rear
7
!
Flammable
Vapor
Sensor
Notice: DO NOT allow the
flammable vapor sensor to
become submerged in water.
Make sure the catch pan is
properly drained.
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