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immediately below the water heater.
– Turn off the incoming water supply.
This can be done at the isolation valve
immediately below the water heater or
by turning off the water supply to the
building.
– Use only your hand to turn the manual
gas shutoff (control) valve. Never use
tools. If the manual gas shutoff (control)
valve will not turn by hand, do not try
to repair it; call a trained and qualified
professional. Force or attempted repair
may result in a fire or explosion.
• DO NOT use this appliance if any part
has been under water. Immediately call
a trained and qualified professional to
inspect the appliance and to replace any
part of the control system and any manual
gas shutoff (control) valve which has been
under water.
• DO NOT use substitute materials. Use
only parts certified for the appliance.
• Should overheating occur or the gas sup-
ply fail to shut off, turn off the manual gas
shutoff (control) valve to the appliance.
• DO NOT adjust the parameter settings un-
less specifically instructed to do so. Only
trained and qualified professionals are
permitted to adjust parameter settings.
• DO NOT use an extension cord or adapter
plug with this appliance.
• Any alteration to the appliance or its con-
trols can be dangerous and will void the
warranty.
• Proper venting is required for the safe
operation of this appliance.
• Flammable liquids such as cleaning sol-
vents, aerosols, paint thinners,
adhesives, gasoline and propane must
be handled and stored with extreme care.
These flammable liquids emit
flammable vapors and when exposed to
an ignition source can result in a fire haz-
ard or explosion. Flammable liquids should
not be used or stored in the vicinity of this
or any other gas appliance.
Rinnai Tankless Water Heater Installation and Operation Manual
• DO NOT operate the water heater
without the front panel installed. The front
panel should only be removed when ser-
vicing/maintaining or replacing
internal components.
• BURN HAZARD. Hot exhaust and vent
may cause serious burns. Keep away from
the water heater. Keep small
children and animals away from the water
heater.
• Hot water outlet pipes leaving the water
heater can be hot to touch.
• Install the vent system per local and na-
tional codes.
• DO NOT install this water heater above
10,200 ft (3,109 m).
• DO NOT obstruct combustion air to the
appliance. Combustion air shall not come
from occupied spaces.
• Failure to properly vent this appliance
can result in death, personal injury and/or
property damage.
• Rinnai recommends that every home have
a carbon monoxide (CO) alarm in the hall-
way near bedrooms in each sleeping area.
Check batteries monthly and replace them
annually.
• DO NOT use this appliance as a pool or
spa heater that uses chemically treated
water. (This appliance is suitable for filling
large or whirlpool spa tubs with potable
water.)
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