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1. WARNINGS
Pay Attention to These Terms
Indicates the presence of immediate hazards which will cause severe personal injury, death or
A
DANGER
substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause severe personal injury,
A
WARNING
death or substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause minor personal injury or
A
CAUTION
product or property damage if ignored.
CAUTION used without the warning alert symbol indicates a potentially hazardous condition which
CAUTION
could cause minor personal injury or product or property damage if ignored.
Indicates special instructions on installation, operation, or maintenance which are important but not
NOTE
related to personal injury hazards.
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DANGER: Make sure the gas on which the heater will
operate is the same type as that specified on the heater
rating plate.
WARNING: Should overheating occur or the gas
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supply valve fail to shut, do not turn off or disconnect
the electrical supply to the heater. Instead, shut off the
gas supply at a location external to the heater.
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WARNING: Do not use this heater if any part has
been under water. Immediately call a qualified service
technician to inspect the heater and to replace any part
of the control system and any gas control which has
been under water.
WARNING: To minimize the possibility of improper
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operation, serious personal injury, fire, or damage to the
heater:
•
Always keep the area around the heater free
of combustible materials, gasoline, and other
flammable liquids and vapors.
•
Heater should never be covered or have any
blockage to the flow of fresh air to the heater.
WARNING: Risk of electrical shock. More than one
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disconnect switch may be required to de-energize the
equipment before servicing.
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CAUTION: This heater requires forced water
circulation when the burner is operating. See minimum
and maximum flow rates. Severe damage will occur if the
heater is operated without proper water flow circulation.
4
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WARNING: Both natural gas and propane have
an odorant added to aid in detecting a gas leak. Some
people may not physically be able to smell or recognize
this odorant. If you are unsure or unfamiliar with the
smell of natural gas or propane, ask your local gas
supplier. Other conditions, such as "odorant fade,"
which causes the odorant to diminish in intensity, can
also hide, camouflage, or otherwise make detecting a
gas leak by smell more difficult.
WARNING: UL recognized fuel gas detectors are
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recommended in all enclosed propane and natural gas
applications wherein there is a potential for an explosive
mixture of fuel gas to accumulate and their installation
should be in accordance with the detector manufacturer's
recommendations and/or local laws, rules, regulations,
or customs.
CAUTION:
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Operation
temperature systems requires special piping. Harmful
internal condensation will occur if the inlet water
temperature does not exceed 120°F (49°C). Warranty
claims will be denied when condensation occurs.
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CAUTION: If this heater is to be installed above
radiation level, it must be provided with a low water cut-
off device at the time of heater installation.
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CAUTION: If this heater is to be installed in a negative
or positive pressure equipment room, there are special
installation requirements. Consult factory for details.
of
this
heater
in
low
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