3
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DANGER
Indicates the presence of immediate hazards which will cause severe personal injury, death or
substantial property damage if ignored.
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A
WARNING
Indicates the presence of hazards or unsafe practices which could cause severe personal injury,
death or substantial property damage if ignored.
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A
CAUTION
Indicates the presence of hazards or unsafe practices which could cause minor personal injury
or product or property damage if ignored.
CAUTION
CAUTION used without the warning alert symbol indicates a potentially hazardous condition
which could cause minor personal injury or product or property damage if ignored.
NOTE
Indicates special instructions on installation, operation, or maintenance which are important but
not related to personal injury hazards.
1. WARNINGS
1.1.
Pay Attention to These Terms
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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.
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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.
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WARNING:
To minimize the possibility of improper
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.
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WARNING:
Risk of electrical shock. More than one
disconnect switch may be required to de-energize the
equipment before servicing.
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WARNING:
Should overheating occur or the gas
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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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.
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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.
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WARNING:
UL-recognized fuel gas detectors are
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.
