A.O. Smith ATO-340H-P Technical Documents | Page 6

A.O. Smith Water Heater Technical Documents - ATO-340H-P.
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SAFETY GUIDELINES

SAFETY DEFINITION

GENERAL

   1.  Follow all local codes, or in the absence of local codes, follow the most recent edition of the National

         Fuel Gas Code:  ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation

       Code in Canada.

   2.  Properly ground the unit in accordance with all local codes or in the absence of local codes, with the

        National Electrical Codes:  ANSI/NFPA 70 in the USA or CSA standard C22.1 Canadian Electrical Code 

        Part 1 in Canada.

   3.  Carefully plan where you intend to install the water heater. Please ensure:

      • Yourwaterheaterwillhaveenoughcombustibleairandproperventilation.

      • Locateyourheaterwherewaterleakagewillnotdamagesurroundingareas.(Pleasereferto

                  p. 8.)

   4.  Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC

        RATING.

     *If this unit does not match your requirements, do not install and consult with the manufacturer.

   5.  If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained

        technician or the Gas Company or the manufacturer.

WARNING

Indicates an imminently hazardous situation which, if not avoided, could result 

in death or serious injury.

CAUTION

Indicates an imminently hazardous situation which, if not avoided, could result 

in minor or moderate injury.

Safety Guidelines

Installation Manual

Indicates an imminently hazardous situation which, if not avoided, will result in 

death or serious injury.

DANGER

WARNING

• Water temperatures over 125 °F (52 °C) can cause severe burns instantly or 

death from scalding.  The water temperature is set at 120 °F (49 °C) from the 

factory to minimize any scalding risk. Before bathing or showering always 

check the water temperature.

• Do not store or use gasoline or other flammables, vapors, or liquids in the 

vicinity of this appliance.

• Do not reverse the water and/or gas connections as this will damage the gas 

valves and can cause severe injury or death.  Follow the diagram on p. 25 

when installing your water heater.

• Do not use this appliance if any part has been in contact with or been 

immersed in water.  Immediately call a licensed plumber, a licensed gas 

fitter, or a professional service technician to inspect and/or service the unit if 

necessary.

• Do not disconnect the electrical supply if the ambient temperature will drop 

below freezing.  The Freeze Protection System only works if the unit has 

electrical power.  The warranty will not be covered if the heat exchanger 

isdamagedduetofreezing.RefertothesectionontheFreezeProtection

System on p. 47 for more information.

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