Installation Considerations; Locating The Water Heater - American Water Heater 300 Series Instruction Manual

LOCATING THE WATER HEATER

Carefully choose a location for the new water heater. The
placement is a very important consideration for the safety of the
occupants in the building and for the most economical use of the
water heater.
CAUTION
Property Damage Hazard
•
All water heaters eventually leak.
•
Do not install without adequate drainage.
Whether replacing an existing water heater or installing the
water heater in a new location observe the following critical
points:
1. The water heater must be located indoors.
2. The water heater must not be located in an area where it
will be subject to freezing temperatures.
3. Locate the water heater so it is protected and not subject
to physical damage by a moving vehicle.
4. Locate the water heater on a level surface.
5. Locate the water heater near a floor drain. The water heater
should be located in an area where leakage of the tank or
connections will not result in damage to the area adjacent
to the water heater or to lower floors of the structure. When
such locations cannot be avoided, it is recommended that
a metal drain pan, piped to adequate drain, be installed
under the water heater. Drain pan should be fabricated with
sides at least 2" deep with diameter at least 2" greater than
diameter of heater.
6. Locate the water heater close to the point of major hot
water usage.
7. Locate the water heater close to a 120 VAC power supply.
See Power Supply on Page 18 for requirements.
8. Locate the water heater where an adequate supply of fresh
air for combustion and ventilation can be obtained. See
Combustion Air and Ventilation on Page 15.
9. Locate the water heater where the vent and intake air piping,
when installed, will remain within the maximum equivalent
lengths allowed. See Venting Installation on page 25.
10. Do not locate the water heater where noise (such as
the Combustion Blower) during normal operation will be
objectionable in adjacent areas.
11. Do not locate the water heater where the subsequent
installation of the vent (exhaust) or intake air terminations
would be objectionable due to noise at the termination(s).
This includes locations close to or across from windows
and doors. See Venting Installation on page 25.
Do not locate water heater areas where flammable liquids
(vapors) are likely to be present or stored (garages, storage
and utility areas, etc.): Flammable liquids (such as gasoline,

INSTALLATION CONSIDERATIONS

solvents, propane (LP or butane, etc.) and other substances
(such as adhesives, etc.) emit flammable vapors which can be
ignited by a gas water heater's ignition device or main burner.
The resulting flashback and fire can cause death or serious
burns to anyone in the area.
When the water heater is 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 (76.2 mm) in any direction or, if the water heater is installed in
an alcove or closet, the entire floor shall be covered by the panel.
The panel must be strong enough to carry the weight of the heater
when full of water.
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