GAS FURNACES SiNGlE StAGE, two-StAGE, & ModUlAtiNG FURNACESUSER’S MANUAlNoN-CoNdENSiNG GAS FURNACES CoNdENSiNG GAS FURNACES80+ AFUE 92.1% AFUE 95% - 97% AFUE*SA Upflow / HorizontalFurnaces*SC Upflow / HorizontalFurnaces*Sd, *tC, *MQ Upflow /Horizontal Furnaces*SK downflowFurnaces*Sl downflowFurnaces*SM & *tl downflowFurnaceswARNiNGFiRE oR EXPloSioN HAZARd• Failure to follow safety warnings exactly couldresult in serious injury or property damage.• Installation and service must be performed bya qualified installer, service agency or the gassupplier.• Do not store or use gasoline or other flammablevapors 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 useany phone in your building.• Leave the building immediately.• Immediately call your gas supplier from aneighbors phone. Follow the gas suppliersinstructions.• If you cannot reach your gas supplier, call thefire department.do Not dEStRoY. PlEASE REAd CAREFUllY & KEEP iN A SAFE PlACE FoR FUtURE REFERENCE.