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INSTALLATIONS IN 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 pilot light or main burner. The resulting flashback and
fire can cause death or serious burns to anyone in the area, as
well as property damage. If installation in such areas is your
only option, then installation must be accomplished in a way
that the pilot flame and main burner flame are elevated from
the floor at least 18 inches. While this may reduce the chances
of flammable vapors, from a floor spill being ignited, gasoline
and other flammable substances should never be stored or
used in the same room or area containing a gas water heater
or other open flame or spark producing appliance. NOTE:
Flammable vapors may be drawn by air currents from other
areas of the structure to the appliance.
Also, the water heater must be located and/or protected so it is
not subject to physical damage by a moving vehicle.
Propellants of aerosol sprays and volatile compounds,
(cleaners, chlorine based chemicals, refrigerants, etc.) in
addition to being highly flammable in many cases, will also
change to corrosive hydrochloric acid when exposed to the
combustion products of the water heater. The results can be
hazardous, and also cause product failure.
This water heater must not be installed directly on carpeting.
Carpeting must be protected by metal or wood panel beneath
the appliance extending beyond the full width and depth of the
appliance by at least 3 inches (76.2 mm) in any direction, or if
the appliance is installed in an alcove or closet, the entire floor
must be covered by the panel. Failure to heed this warning
may result in a fire hazard.
Minimum clearances between the water heater and
combustible construction are 0 inch at the sides and rear,
6 inches (152 mm) at the front, and 0 inches from the vent pipe.
Clearance from the top of the jacket is 14 inches (356 mm) on
most models. Note that a lesser dimension may be allowed
on some models, refer to the label attached adjacent to the
gas control valve on the water heater, see Figure 9.
FIGURE 9.
A gas water heater cannot operate properly without the correct
amount of air for combustion. Do not install in a confined area
such as a closet, unless you provide air as shown in the
Locating The New Water Heater section. Never obstruct the
flow of ventilation air. If you have any doubts or questions at all,
call your gas supplier. Failure to provide the proper amount of
combustion air can result in a fire or explosion and cause
death, serious bodily injury, or property damage.
FIGURE 10.
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas.
Combustion Air and Ventilation
When determining the installation location for a power vent
water heater, snow accumulation and drifting should be
considered in areas where applicable.
VENTING CLEARANCES
• 0” clearance for 3” (and optional 2” and 4”) PVC, ABS or
CPVC Schedule 40 vent piping from combustible surfaces.
• Do not obstruct water heater air
intake with insulating blanket.
• Install water heater in accordance
with the instruction manual.
• Gas and carbon monoxide
detectors are available.