940 ESOFor Outdoor Installations OnlyTemperature Modulated with Electronic IgnitionSuitable for heating potable water and space heating(Intended for variable flow applications)6720644956-00.1V940 ESO - Natural Gas940 ESO - Liquefied Petroleum (LP) Gas6 720 644 956 (2010/09) USWarning: If the information in this manual is notfollowed exactly, a fire or explosion may resultcausing property damage, personal injury or death.Do not store or use gasoline or other flammablevapors and liquids in the vicinity of this or any otherappliance.Improper installation, adjustment, alteration,service or maintenance can cause injury orproperty damage. Refer to this manual. Forassistance or additional information consult aqualified installer, service agency or the gassupplier.In the Commonwealth of Massachusetts thisproduct must be installed by a licensed plumber orgas fitter.Upon completion of the installation, theseinstructions should be handed to the user of theappliance for future reference.What to do if you smell gas• Close gas valve. Open windows.• Do not try to light any appliance.• Do not touch any electrical switch; do not use anyphone in your building.• Immediately call your gas supplier from a neighbor’sphone. Follow the gas supplier’s instructions.• If you cannot reach your gas supplier, call the firedepartment.• Installation and service must be performed by aqualified installer, service agency or the gas supplier.