4
Location Requirements
The FVIR System is designed to reduce the risk of
flammable vapor-related fires. Flammable liquids (such as
gasoline, solvents, propane, etc,) emit flammable vapors
which can be ignited by a gas water heater’s spark igniter
or main burner. The resulting flashback and fire can cause
death or serious burns to anyone in the area.
This heater is equipped with an FV sensor for detecting the
presence of flammable vapors. When the sensor detects
those vapors, the unit will shut down and not operate.
Should this happen, please refer to the troubleshooting
guide. Even though this water heater is a flammable vapors
FIRE AND EXPLOSION HAZARD
Can result in serious injury or death
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Storage of or use of gasoline or other
flammable vapors or liquids in the vicinity
of this or any other appliance can result in
serious injury or death.
Flammable Vapors
FLAMMABLES
Read and follow water heater warnings and
instructions.
WARNING
Carbon Monoxide Poisoning Hazard
Do not install in a mobile home.
Doing so can result in death or
carbon monoxide poisoning.
WARNING
ignition resistant water heater and is designed to reduce
the chances of flammable vapors being ignited, gasoline
and other flammable substances should never be stored
or used in the same vicinity or area containing a gas water
heater or other open flame or spark producing appliance.
In the event the FVIR system does not prevent the ignition
of flammable vapors, the Flame Lock
®
Safety System is
designed to reduce the risk of flammable vapor-related
fires.
The patented Flame Lock
®
Safety System protects your
family by trapping the burning vapors within the water
heater combustion chamber through the special flame-trap.
The burning vapors literally “burn themselves out” without
escaping back into the room. In the event of a flammable
vapor incident, the Flame Lock
®
Safety System disables
the water heater by shutting off the gas supply to the
water heater’s burner and pilot, preventing re-ignition of
any remaining flammable vapors in the area. This will not
prevent a possible fire/explosion if the igniter activates and
flammable vapors have accumulated in the combustion
chamber with the pilot light off. If you suspect a flammable
vapor incident has occurred, do not use this appliance.
Do not attempt to light this appliance if you suspect
flammable vapors have accumulated inside or outside the
appliance. Immediately call a qualified person to inspect
the appliance. Water heaters subjected to a flammable
vapors incident will show a discoloration on the flame-trap
and require replacement of the entire water heater.
NOTE:
Not following these instructions and/or an inadequate
air supply can cause the Flame Lock
®
Safety System to
disable the water heater. Please make required installation
and venting/air supply changes prior to resetting the system
(see “Combustion Air Supply and Ventilation” section).
IMPORTANT:
This water heater has a resettable thermal
switch installed as part of the Flame Lock
®
Safety System.
Do not attempt to disable or modify this feature in any way.
Do not use or store flammable products such as gasoline,
solvents, or adhesives in the same room or area near the
water heater. If such flammables must be used, all gas
burning appliances in the vicinity must be shut off and their
pilot lights extinguished. Open the doors and windows for
ventilation while flammable substances are in use.
If flammable liquids or vapors have spilled or leaked in the
area of the water heater, leave the area immediately and
call the fire department from a neighbor’s home. Do not
attempt to clean the spill until all ignition sources have been
extinguished.
Keep combustibles such as boxes, magazines, clothes,
etc. away from the water heater area.
Site Location
•
Select a location near the center of the water piping
system. The water heater must be installed indoors and
in a vertical position on a level surface. Do not install in
bathrooms, bedrooms, or any occupied room normally
kept closed.
•
Locate the water heater as close to the chimney or gas
vent as practical. Consider the vent system piping and
combustion air supply requirements when selecting the
water heater location. The venting system must be able
to run from the water heater to termination with minimal
length and elbows.
FV Sensor
Figure 1:
FV Sensor