Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
36
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Any change to this heater or its controls can be dangerous.
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or carbon monoxide poisoning.
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Do not use a blower insert, heat exchanger insert or other accessory, not approved for use with
this heater where applicable.
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of high surface temperature and should stay away
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sooting, an unvented gas heater should be cleaned
before use and at least annually by a professional
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partments, burners and circulating air passageways
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CARBON MONOXIDE POISONING:
Early signs of
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the absence of local codes, with the
National Fuel
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Unvented
Heaters
, latest edition and
ANSI Z21.60-2012.
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heater, and annual cleaning are necessary to avoid
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from improper installation or operation, can settle on
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Caution:
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unless the required volume of indoor combustion air is
provided by the method described in the
National Fuel
Gas Code, ANSI Z223.1/NFPA 54
, the
International
Fuel Gas Code
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tight construction, additional mechanical ventilation is
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components of this appliance are treated with certain
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harmful but may produce annoying smoke and smells
as they are burned off during the initial operation of the
appliance; possibly causing headaches or eye or lung
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Important Safety and Operating Information (continued)
WARNING