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WARNING
WARNING
CAUTION
Rinnai Tankless Water Heater Installation and Operation Manual 7
2.2 Safety Precautions
The following precautions apply to the trained and
qualied professional and consumer. Read and
follow all instructions in this section.
DO NOT adjust the
internal gas valve.
The design is such that adjustment is not re-
quired. Warranty may be voided if the internal gas
valve is adjusted.
• Before operating, smell all around the ap-
pliance area for gas. Be sure to smell next
to the oor because some gas is heavier
than air and will settle on the oor.
• Keep the area around the appliance clear
and free from combustible materials,
gasoline, and other ammable vapors and
liquids.
• Combustible construction refers to adja-
cent walls and ceiling and should not be
confused with combustible or ammable
products and materials. Combustible and/
or ammable products and materials
should never be stored in the vicinity of
this or any gas appliance.
• Always check the water temperature be-
fore entering a shower or bath.
• To protect yourself from harm, before per-
forming maintenance:
– Turn o the electrical power supply by
unplugging the power cord or by turning
o the electricity at the circuit breaker.
(The temperature controller does not
control the electrical power.)
– Turn o the gas at the manual gas con-
trol valve, usually located immediately
below the water heater.
– Turn o the incoming water supply.
This can be done at the isolation valve
immediately below the water heater or
by turning o the water supply to the
building.
Safety alert symbol. Alerts you to
potential hazards that can kill or hurt you
and others.
Indicates an imminently
hazardous situation which,
if not avoided, will result in
personal injury or death.
DANGER
Indicates a potentially
hazardous situation which,
if not avoided, could result
in minor or moderate injury.
It may also be used to alert
against unsafe practices.
Indicates an imminently
hazardous situation which,
if not avoided, will result in
personal injury or death.
2.1 Safety Symbols
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