High Altitude; Adjusting Air Shutter For Higher Altitudes - Lochinvar LTN07575 Instruction Manual

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
floor at least 18 inches. While this may reduce 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.
This water heater must not be installed directly on
carpeting. Carpeting must be protected by metal or wood
panel beneath the water heater extending beyond the full
width and depth of the water heater by at least 3" (76.2
mm) in any direction, or if the water heater 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.

HIGH ALTITUDE

Water heaters covered in this manual have been tested
and approved for installation at elevations up to 7,700
feet (2,347 m) above sea level. For installation above
7,700 feet (2,347 m), the water heater's Btu input should
be reduced at the rate of 4 percent for each 1,000 feet
(305 m) above sea level which requires replacement of
the burner orifice in accordance with the National Fuel
Gas Code ANSI Z223.1/NFPA 54. Contact your local gas
supplier for further information.
Failure to replace the standard orifice with the proper
high altitude orifice when installed at elevations above
7,700 feet (2,347 m) could result in improper and
inefficient operation of the water heater, producing carbon
monoxide gas in excess of the safe limits. This could
result in serious injury or death. Contact your local gas
supplier for any specific changes that may be required in
your area.
ADJUSTING AIR SHUTTER FOR HIGHER ALTI-
TUDES
The air shutter is preset with the air shutter in the open
position and for most applications changing the air
shutter is not required.
FIGURE 3. AIR SHUTTER OPEN
A correctly set burner should have a stable quiet flame.
The flame will be blue with a well defined blue inner
flame, Some yellow tipping is normal with LP gas. See
.
Figure 4
9