2SAFETY CONSIDERATIONSFIRE, EXPLOSION, ELECTRICAL SHOCK, ANDCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in dangerousoperation, serious injury, death, or property damage.Improper installation, adjustment, alteration, service,maintenance, or use could cause carbon monoxidepoisoning, explosion, fire, electrical shock, or otherconditions which may cause personal injury or propertydamage. Consult a qualified service agency, local gassupplier, or your distributor or branch for information orassistance. The qualified service agency must use onlyfactory--authorized and listed kits or accessories whenmodifying this product.! WARNINGFURNACE RELIABILITY HAZARDImproper installation or misapplication of furnace mayrequire excessive servicing or cause premature componentfailure.Application of this furnace should be indoors with specialattention given to vent sizing and material, gas input rate,air temperature rise, unit leveling, and unit sizing.CAUTION!Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electrical shock, orother conditions which may cause death, personal injury, orproperty damage. Consult a qualified installer, service agency, oryour distributor or branch for information or assistance. Thequalified installer or agency must use factory--authorized kits oraccessories when modifying this product. Refer to the individualinstructions packaged with the kits or accessories when installing.Follow all safety codes. Wear safety glasses, protective clothing,and work gloves. Have a fire extinguisher available. Read theseinstructions thoroughly and follow all warnings or cautionsinclude in literature and attached to the unit. Consult localbuilding codes, the current editions of the National Fuel GasCode (NFGC) NFPA 54/ANSI Z223.1 and the NationalElectrical Code (NEC) NFPA 70.Recognize safety information. This is the safety--alert symbol .When you see this symbol on the unit and in instructions ormanuals, be alert to the potential for personal injury.Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety--alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION isused to identify unsafe practices which may result in minorpersonal injury or product and property damage. NOTE is usedto highlight suggestions which will result in enhancedinstallation, reliability, or operation.CUT HAZARDFailure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use careand wear appropriate protective clothing, safety glasses andgloves when handling parts and servicing furnaces.CAUTION!1. Use only with type of gas approved for this furnace. Referto the furnace rating plate.2. Install this furnace only in a location and position as spe-cified in the “Location” section of these instructions.3. Provide adequate combustion and ventilation air to thefurnace space as specified in “Air for Combustion andVentilation” section.4. Combustion products must be discharged outdoors. Con-nect this furnace to an approved vent system only, as spe-cified in the “Venting” section of these instructions.5. Never test for gas leaks with an open flame. Use a com-mercially available soap solution made specifically for thedetection of leaks to check all connections, as specified inthe “Gas Piping” section.6. Always install furnace to operate within the furnace’s in-tended temperature--rise range with a duct system whichhas an external static pressure within the allowable range,as specified in the “Start--Up, Adjustments, and SafetyCheck” section. See furnace rating plate.7. When a furnace is installed so that supply ducts carry aircirculated by the furnace to areas outside the space con-taining the furnace, the return air shall also be handled byduct(s) sealed to the furnace casing and terminating out-side the space containing the furnace. See “Air Ducts” sec-tion.8. A gas--fired furnace for installation in a residential garagemust be installed as specified in the warning box in the“Location” section.9. The furnace may be used for construction heat providedthat the furnace installation and operation complies withthe first CAUTION in the LOCATION section of these in-structions.10. These Multipoise Gas--Fired Furnaces are CSA (formerlyA.G.A. and C.G.A). design--certified for use with naturaland propane gases (see furnace rating plate) and for install-ation in alcoves, attics, basements, closets, utility rooms,crawlspaces, and garages. The furnace is factory--shippedfor use with natural gas. A CSA listed accessory gas con-version kit is required to convert furnace for use with pro-pane gas.11. See Fig. 2 for required clearances to combustible construc-tion.12. Maintain a 1--in. (25 mm) clearance from combustible ma-terials to supply air ductwork for a distance of 36 inches(914 mm) horizontally from the furnace. See NFPA 90Bor local code for further requirements.13. These furnaces SHALL NOT be installed directly on car-peting, tile, or any other combustible material other thanwood flooring. In downflow installations, factory access-ory floor base MUST be used when installed on combust-ible materials and wood flooring. Special base is not re-quired when this furnace is installed on manufacturer’sCoil Assembly Part No. CAR, CAP, CNRV, and CNPV, orwhen Coil Box Part No. KCAKC is used. See Fig. 2 forclearance to combustible construction information.INTRODUCTIONSeries 120/C 4--way multipoise Category I fan--assisted furnace isCSA design--certified. A Category I fan--assisted furnace is anappliance equipped with an integral mechanical means to eitherdraw or force products of combustion through the combustionchamber and/or heat exchanger. The furnace is factory--shippedfor use with natural gas.This furnace is not approved for installation in mobile homes,recreational vehicles, or outdoors. This furnace is designed forminimum continuous return--air temperature of 60_F (16_C)dbor intermittent operation down to 55_F (13_C) db such as whenPG8MEA