SAFETY CONSIDERATIONSInstalling and servicing heating equipment can be hazardous due togas and electrical components. Only trained and qualified person-nel should install, repair, or service heating equipment. Untrainedpersonnel can perform basic maintenance functions such as clean-ing and replacing air filters. All other operations must be per-formed by trained service personnel. When working on heatingequipment, observe precautions in literature, on tags, and on labelsattached to or shipped with unit and other safety precautions thatmay apply.Follow all safety codes. In the United States, follow all safetycodes including the National Fuel Gas Code (NFGC) NFPA No.54-1999/ANSI Z223.1-1999 and the Installation Standards, WarmAir Heating and Air Conditioning Systems (NFPA 90B)ANSI/NFPA 90B.In Canada, refer to the current edition of the CAN/CGA-B149.1-and .2-M95 National Standard of Canada, Natural Gas andPropane Installation Codes (NSCNGPIC).Wear safety glasses and work gloves. Have a fire extinguisheravailable during start-up and adjustment procedures and servicecalls.Recognize safety information. This is the safety-alert symbol .When you see this symbol on unit or in instructions and manuals,be alert to potential for personal injury.Understand the signal words DANGER, WARNING, and CAU-TION. These words are used with the safety-alert symbol. DAN-GER identifies most serious hazards which will result in severepersonal injury or death. WARNING signifies hazards whichcould result in personal injury or death. CAUTION is used toidentify unsafe practices which would result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability,or operation.Fig. 3—Clearances to CombustiblesA99230*ا†Clearance in inchesThis furnace is approved for UPFLOW, DOWNFLOW andHORIZONTAL installations.F R O N TF U R N A C ES I D E*BOTTOM0"3"0"0"TOP/PLENUM1"0"F R O N TS E R V I EC†S I D E30MINFRONTFRONTLEVEL (0")TO1/2" MAXLEVEL (0")TO1/2" MAXHORIZONTALUPFLOW ORDOWNFLOW324999-201 REV. B (LIT)ALL POSITIONS:HORIZONTAL POSITIONS:DOWNFLOW POSITIONS:Mimimum front clearance for service 30 inches (762mm).140 size furnaces require 1 inch back clearance to combustiblematerials.For installation on combustible floors only when installed onspecial base No. KGASB0201ALL, Coil Assembly, Part No. CD5or CK5, or Coil Casing, Part No. KCAKC.Furnace must be installed level, or pitched forward within 1/2 inchof level for proper drainage. Failure will result in equipment orproperty damage. See Installation Manual for IMPORTANT unitsupport details on horizontal applicationsThis forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m), except 140 size Furnaces are only approved for altitudes0 - 7,000 ft. (0 - 2,135m).An accessory kit, supplied by the manufacturer, shall be used to convert to propane gas use or may be required for some natural gas applications.This furnace is for indoor installation in a building constructed on site. This furnace may be installed in a manufactured (mobile) home when stated on ratingplate and using factory authorized kit.This furnace may be installed on combustible flooring in alcove or closet at minimum clearance from combustible material.This appliance requires a special venting system. Refer to the installation instructions for parts list and method of installation. This furnace is for use withschedule-40 PVC, PVC-DWV, CPVC or ABS-DWV pipe, and must not be vented in common with other gas-fired appliances. Construction through whichvent/air intake pipes may be installed is maximum 24 inches (600 mm), minimum 3/4 inches (19 mm) thickness (including roofing materials).MINIMUM INCHES CLEARANCE TOCOMBUSTIBLE CONSTRUCTIONLine contact is permissible only between lines formed byintersections of top and two sides of furnace jacket, and buildingjoists, studs, or framing.Clearance shown is for air inlet and air outlet end.120 and 140 size Furnaces require 1 inch bottom clearance tocombustible materials.INSTALLATION††††§Ø§Vent clearance tocombustibles 0”.B C KA3