GAS FURNACESHIGH EFFICIENCY - SINGLE STAGE CONDENSING FURNACES92.1% AFUEUSER’S MANUALWARNINGFIRE OR EXPLOSION HAZARD• Failure to follow safety warnings exactly could result in serious injury or property damage.• Installation and service must be performed by a qualified installer, service agency or the gassupplier.• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or anyother appliance.WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electrical switch; do not use any phone in your building.• Leave the building immediately.• Immediately call your gas supplier from a neighbors phone. Follow the gas suppliers instructions.• If you cannot reach your gas supplier, call the fire department.DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.IMPORTANT! Please read all information in this manual thoroughly and become familiar with the capabilities and use of yourappliance before attempting to operate or maintain this unit. Pay attention to all safety warnings and any other special noteshighlighted in the manual. Safety markings are used frequently throughout this manual to designate a degree or level of seriousnessand should not be ignored.Keep this literature where you have easy access to it in the future. If a problem occurs, check the instructions and followrecommendations given. If these suggestions don’t eliminate your problem, call your servicing contractor. Under no circumstancesshould the appliance owner attempt to install and/or service this equipment.Some local codes require licensed installation / service personnel for this type of equipment. Improper service, adjustment, ormaintenance may cause explosion, fire, electrical shock or other hazardous conditions which may result in personal injury orproperty damage.MG3P Upflow Models MG3S Downflow Models