L.B. White HW 120 Therma Grow - Manual (Page 5)

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Propane gas and natural gas have a distinctive odor.
Learn to recognize these odors. (Reference Fuel Gas
Odor and Odor Fading sections above.
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If you have not been properly trained in repair and service
of propane gas and natural gas fueled heaters, then do
not attempt to light heater, perform service or repairs, or
make any adjustments to the heater on propane gas or
natural gas fuel system.
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Even if you are not properly trained in the service and
repair of the heater, ALWAYS be consciously aware of the
odors of propane gas and natural gas.
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A periodic sniff test around the heater or at the heater’s
joints; i.e. hose, connections, etc., is a good safety
practice under any conditions. If you smell even a small
amount of gas, CONTACT YOUR FUEL GAS SUPPLIER
IMMEDIATELY. DO NOT WAIT!
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Safety Precautions
LP gas and natural gas have man-made odorants added specifically for detection of fuel gas leaks.
If a gas leak occurs, you should be able to smell the fuel gas.
THAT’S YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!
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Do not take any action that could ignite the fuel gas. Do
not operate any electrical switches.
Do not pull any
power supply or extension cords. Do not light matches
or any other source of flame. Do not use your telephone.
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Get everyone out of the building and away from the area
immediately.
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Close all propane gas tank or cylinder fuel supply valves,
or the main fuel supply valve located at the meter if you
use natural gas.
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Propane gas is heavier than air and may settle in low
areas.
When you have reason to suspect a propane
leak, keep out of all low areas.
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Natural gas is lighter than air and can collect around
rafters or ceilings.
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Use your neighbor’s phone and call your fuel gas
supplier and your fire department. Do not re-enter the
building or area.
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Stay out of the building and away from the area until
declared safe by the firefighters and your fuel gas
supplier.
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FINALLY, let the fuel gas service person and the
firefighters check for escaped gas. Have them air out
the building and area before you return. Properly trained
service people must repair the leak, check for further
leakages, and then relight the appliance for you.
WARNING
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Do not use this heater for heating human living quarters.
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Do not use in areas without proper air exchange. See air
exchange requirements on page 4 or on heater’s
dataplate.
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Exhaust fans, supply air inlets, or exhaust fan outlets
must not be obstructed.
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Proper air exchange must be provided for either indoor
or outdoor mount installations.
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Refer to the specification section and installation
instructions of the heater’s Owner’s Manual, heater
dataplate, or contact the L.B. White Company to
determine air exchange requirements of the heater.
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Lack of proper air exchange will lead to improper
combustion.
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Improper combustion can lead to carbon monoxide
poisoning in humans leading to serious injury or death.
Symptoms of carbon monoxide poisoning can include
headaches, dizziness and difficulty in breathing.
Asphyxiation Hazard
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Some people cannot smell well. Some people cannot
smell the odor of the man-made chemical added to
propane (LP) or natural gas. You must determine if you
can smell the odorant in these fuel gases.
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Learn to recognize the odor of propane gas and natural
gas. Local propane gas dealers and your local natural
gas supplier (utility) will be more than happy to give you
a scratch and sniff pamphlet. Use it to become familiar
with the fuel gas odor.
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Smoking can decrease your ability to smell. Being
around an odor for a period of time can affect your
sensitivity to that particular odor.
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The odorant in propane gas and natural gas is
colorless and the intensity of its odor can fade under
some circumstances.
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If there is an underground leak, the movement of gas
through the soil can filter the odorant.
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Propane gas odor may differ in intensity at different
levels. Since propane gas is heavier than air, there may
be more odor at lower levels.
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Always be sensitive to the slightest gas odor. If you
continue to detect any gas odor, no matter how small,
treat it as a serious leak. Immediately go into action as
discussed previously.
FUEL GAS ODOR
ODOR FADING -- NO ODOR DETECTED
ATTENTION -- CRITICAL POINTS TO REMEMBER!