
15
LOCATING THE WATER HEATER
Property Damage Hazard
All water heaters eventually leak.
•
Do not install without adequate drainage.
•
CAUTION
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.
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. In garage installation
avoid damage to your water heater by installing a vehicle
stop as shown in Figure 5. Check state and local codes for
requirements prior to installation.
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 1-3/4” deep with diameter at least 2” greater than
diameter of heater. Pan must not restrict combustion air flow.
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 16.
9. Locate the water heater where the vent and intake air piping,
when installed, will remain within the maximum equivalent
lengths allowed. See Planning the Vent System on page 24.
Figure 5. GARAGE INSTALLATION
10. Do not locate the water heater where noise (such as
the Combustion Blower) during normal operation will be
objectionable in adjacent areas.
INSTALLATION CONSIDERATIONS
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 beginning on page 22.
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, 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″ (7.62 cm) 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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