(45.7 CM) OR MOREABOVETHE FLOOR. THIS MAYREDUCETHE RISK IF LOCATION IN SUCHANAREACANNOTBEAVOIDED.
DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A CARPETED FLOOR. A FIRE HAZARD MAY RESULT. Instead the water heater must be placed on a metal or wood panel extending beyond the full width and depth by at least 3 inches (7.6 CM) in any direction. If the heater is installed in a carpeted alcove or closet, the entire floor shall be covered by the panel. Also, see the drain requirements.
THIS HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
WARNING
FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON OR ADJACENT TO THE HEATER. OPEN CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER.
When installing the heater, consideration must be given to proper location. Location selected should be as close to the stack or chimney as practicable, with adequate air supply and as centralized with the piping system as possible.
THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING.
THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENTAREA OR TO LOWER FLOORS OF THE STRUCTURE.
WHEN SUCH LOCATIONS CANNOT BE AVOIDED, A SUITABLE DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER. Such pans should be fabricated with sides at least 2" (5cm) deep, with length and width at least 2" (5cm) greater than the diameter of the heater and must be piped to an adequate drain. The pan must not restrict combustion air flow.
Drain pans suitable for these heaters are available from your distributor or A. O. Smith Water Products Company, 5621 West 115th Street, Alsip, IL 60803. In Canada, A.O. Smith Enterprises, Ltd., P.O. Box
For appliance installation locations with elevations above 2000 feet (610 meters), refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.
CLEARANCES
These heaters are approved for installation on combustible flooring in a closet having a ceiling 12" (30.5cm) above top cover and with clearances to combustible construction of 6" (15.2cm) from flue or vent connector, 0" (0cm) at the sides and rear and 5" (10.2cm) to front to prevent a possible fire hazard condition. A minimum of 4" (10.2cm) shall be allowed for installation of serviceable parts.
HARD WATER
Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment.
See MAINTENANCE section for details of tank cleanout procedure.
AIR REQUIREMENTS
REFER TO THE LATEST EDITION OF THE "NATIONAL FUELGAS CODE ANSI Z223.1/NFPA 54. FOR CANADA CONSULT CAN/CSA B149.1
KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLES, VAPORS AND LIQUIDS.
DONOTOBSTRUCTTHEFLOWOFCOMBUSTIONORVENTILATINGAIR.
WARNING
ATTICAND/OR EXHAUST FANS OPERATING ON THE PREMISES WITHA WATER HEATER CAN RESULTIN CARBON MONOXIDE POISONINGAND DEATH.
OPERATION OF THESE FANS CAN PRODUCE A NEGATIVE DRAFT IN THEAREAOF THE WATER HEATER PREVENTING THE PRODUCTS OF COMBUSTION FROM EXHAUSTING THROUGH THE CHIMNEY OR VENT PIPE.
The venting of the water heater should be inspected by a qualified service technician at the time of installation and periodically thereafter to ensure a
WARNING
FORSAFEOPERATIONPROVIDEADEQUATEAIRFORCOMBUSTIONAND VENTILATION. AN INSUFFICIENT SUPPLY OF AIR WILL CAUSE RECIRCULATION OF COMBUSTION PRODUCTS RESULTING IN AIR CONTAMINATIONTHATMAYBEHAZARDOUSTOLIFE. SUCHACONDITION OFTENWILLRESULTINAYELLOW,LUMINOUSBURNERFLAME,CAUSING CARBONINGORSOOTINGOFTHECOMBUSTIONCHAMBER,BURNERS AND FLUETUBESAND CREATESARISK OFASPHYXIATION.
Where an exhaust fan is supplied in the same room with a heater, sufficient openings for air must be provided in the walls. UNDERSIZED OPENINGS WILLCAUSEAIRTOBEDRAWNINTOTHEROOMTHROUGHTHECHIMNEY, CAUSING POOR COMBUSTION. SOOTING MAY RESULT IN SERIOUS DAMAGETOTHEHEATERANDRISKOFFIREOREXPLOSION.
DONOTOBSTRUCTTHEFLOWOFCOMBUSTIONANDVENTILATINGAIR. ADEQUATEAIRFORCOMBUSTIONANDVENTILATIONMUSTBEPROVIDED FORSAFEOPERATION.
UNCONFINED SPACE
In buildings of conventional frame, brick, or stone construction, unconfined spaces may provide adequate air for combustion, ventilation and draft hood dilution.
If the unconfined space is within a building of tight construction (buildings using the following construction: weather stripping, heavy insulation, caulking, vapor barrier, etc.), air for combustion, ventilation and draft hood dilution must be obtained from outdoors. The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply.
CONFINEDSPACE
When drawing combustion and dilution air from inside a conventionally constructed building to a confined space, such a space shall be provided with two permanent openings, ONE IN OR WITHIN 12 INCHES (30.5cm)
OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12 INCHES (30.5cm) OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of at least one square inch per 1000 Btuh (2,225mm2/Kw) of the total input of all appliances in the enclosure, but not less than 100 square inches (645 square cm).
If the confined space is within a building of tight construction, air for combustion, ventilation, and draft hood dilution must be obtained from outdoors. When directly communicating with the outdoors or communicating with the outdoors through vertical ducts, two permanent openings, located in the above manner, shall be provided. Each opening shall have a free area of not less than one square inch per 4000 Btuh (8,900mm2/Kw) of the total input of all appliances in the enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000 Btuh (4,450mm2/Kw) of the total input of all appliances in the enclosure. For Canadian installations consult CAN/CSA
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