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USER'S INFORMATION MANUAL FOR OPERATION AND MAINTENANCE OF YOUR GAS - FIRED FUNACE USER : Please read all instructions in NOTE TO INSTALLER : the manual and retain all manuals for THIS MANUAL MUST BE LEFT WITH THE future reference . EQUIPMENT USER . WARNING : FIRE OR EXPLOSION HAZARD Failure to fbllow safety warnings exactly could result in serious injury , death , or property damage . - - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other 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 neighbor's phone . Follow the gas supplier's instructions . / • If you cannot reach your gas supplier , call the fire department . - - Installation and service must be performed by a qualified installer , service agency or the gas supplier . Do not use this furnace if any part has been WARNING : under water . A flood - damaged furnace is Carbon Monoxide is invisible , odorless , and toxic ! extremely dangerous . Attempts to use the Carrier Corporation recommends a carbon mon - furnace can result in fire or explosion . A oxide alarm in your home , even if you do not own qualified service agency should be contacted a gas appliance . Locate the carbon monoxide alarm in the living area of your home and away to inspect the furnace and to replace all gas from gas appliances and doorways to attached controls , control system parts , electrical garages . Folh , w the alarm manufacturer's instruc - parts that have been wet or the furnace if tion included with the alarm . deemed necessary .
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TABLE OF CONTENTS WELCOME TO A NEW GENERATION OF COMFORT . . . . . . . 2 GENERAL FURNACE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 FURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 BEFORE STARTING YOUR FURNACE . . . . . . . . . . . . . . . . . . . . . . . 4 STARTING AND SHUTYING DOWN YOUR FURNACE . . . . . . . 4 Steps for Starting Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 6 Shutting Down Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 PERFORMING ROUTINE MAINTENANCE . . . . . . . . . . . . . . . . . . . 6 Filtering Out Trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . . . . . . . . . . 8 Heading South for the Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A CHECK - UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10 BEFORE YOU REQUEST A SERVICE CALL . . . . . . . . . . . . . . . . . 10 INSTALLATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 As an ENERGY STAR ® WELCOME TO A NEW GENERATION partner , Carrier Corporation has determined that this OF COMFORT product meets the ENERGY STAR ® guidelines for Congratukttions ! In light of rising energy costs , the 58MXA , energy efficiency . 58MCA , 58MTA , and WeatherMaker Infinity , Multipoise , Gas - Fired Condensing Furnaces are among the soundest investments 15 . Freeze Damage Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,9 today's homeowner can make . 16 . Loud Noise Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Your new furnace is truly a triumph of technology in home heat - 17 . Antifreeze Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ing . A revolutionary design employs 2 heat exchangers to " squeeze " out the maximum amount of heat from the fuel con - sumed . In fact , your new furnace is so efficient , over 90 % * of the MODELS 58MXA ( SHOWN ) AND heat generated during combustion is captured and delivered inside 58MCA FIXED - CAPACITY FURNACES your home . That is more than a 33 % * increase in heating effi - ciency over conventional furnaces . These are among the most enelgy - efficient furnaces you can buy to - day . They also are among the safest and most dependable . We are proud of the technological advances incolporated into the design of these funmces . With only minimal care , your new fulnace will deliver many years of money - saving home comfort and enjoyment . Spend just a few minutes with this manual to learn the operation of your new fulnace and the small amount of maintenance it takes to help keep it operating at peak efficiency ye _ u after yeal ; _ Theoutput capacilyand anyreprcsentalionsof efficiencyIbr this filrnaceale based on standard U . S . Deparlmenl of Energytest procedures . GENERAL FURNACE SAFETY 1 . Comhustihle Materials , Gasoline Warning . . . . . . . . . . . . . . . . . 1,4 2 . Furnace Must be Kept Free and Clear of Insulating Material Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 . Furnace Needs Air Ibr Combustion and Ventilation Warning . . . 4 4 . Starting ( Lighting ) and Shutting Down the Furnace W : arning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 6 5 . Proper Furnace Shutdown Procedures . . . . . . . . . . . . . . . . . . . . . . . 5 = : : : : : : : : = 6 . Flood Damage W'arning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7 . Fire or Explosion Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8 . Carbon Monoxide Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9 . Service and Maintenance Electrical Hazard Warning . . . . . . . . . . 7 10 . Improper Vent Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 MODEL 58MVP 11 . Sharp Edges Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 VARIABLE - CAPACITY 12 . No Filter Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 AND MODEL 58MTA 13 . Filter Rod Modification Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TWO - STAGE FURNACES 14 . Dirt , Rust , or Accumulation Caution . . . . . . . . . . . . . . . . . . . . . . . . 9 2
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FURNACE COMPONENTS [ _ Cornbnstion - air intake connection to ensure contami - 17 2 © nant - fiee air ( right or left side ) . 3 Burner sight glass for viewing burner flalne . Burner assembly ( inside ) . Operates with energy - saving 12 inshot burners and hot surt _ ce igniter for safe , 18 dependable heating . Redundant gas valve . Safe and efficient . Features 1 gas control with 2 internal shutoff valves . Valve appearance 11 14 varies with furnace model . 16 Vent outlet . Uses PVC pipe to carry flue gas fiom the fnr - 15 nace's combustion system ( right or left side ) . 9 Inducer motor . Pulls hot flue gases through the heat ex - 13 changers , maintaining negative pressure for added safety . 7 U1 Blower access panel safety interlock switch . 10 19 Air filter and retainer . Condensate & ain connection . Collects moisture con - densed fiom burned gases for disposal into holne drain system . ( Location in fnrnace varies . ) 3 Heavy - duty blower . Circulates air across the heat ex - changers to transfer heat into the home . MODELS 58MXA , 58MCA , AND 58MTA Secondary condensing heat exchanger ( inside ) . Wrings FURNACES ( UPFLOW POSITION ) out more heat through condensation . Constructed with polypropylene - laminated steel to ensure durability . 17 Primary serpentine heat exchanger ( inside ) . Stretches fuel dollars with the S - shaped heat - flow design . Solid con - struction of corrosion - resistant aluminized steel means re - liability . Furnace control board . 3 - amp fuse provides electrical and component protection . Light emitting diode ( LED ) on fnrnace control board . llJ Code light is for diagnosing furnace operation and service requirements . 15 Pressure switch ( es ) ensure adequate flow of flue gas 14 through furnace and out vent systeln . 13 Rollout switch ( manual reset ) to prevent overtemperature . 7 Junction box for 115 - v electrical power supply . ( May be 19 located on right or left side ) l0 Transformer ( 24v ) behind furnace control board pro - vides low - voltage power to fnrnace control board and thermostat . 4 MODEL 58MVP FURNACE ( UPFLOW POSITION )
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SAFETY CONSIDERATIONS • Do not cover the furnace , store trash or debris near it , or Recognize safety information . This is the safety - alert sym - in any way block the flow of fiesh air to the unit . bol z2x . When you see this symbol on the furnace and in instrucfions or manuals , be alert to the potential for personal • A tunmce installed in an attic or other insulated space must inj ury . be kept fiee and clear of insulating material . Examine the fur - nace area when the funmce is installed or when insulation is Understand the signal words - - DANGER , WARNING , added . Some materials may be combustible . CAUTION and NOTE . DANGER , WARNING and This furnace contains SAFETY DEVICES which must be CAUTION are used with the safety - alert symbol . vDANGERere identifies the most serious hazards which will result in se MANUALLY RESET . If the furnace is left unattended for personal injury or death . WARNING signifies hazards which an extended period of time , have it checked periodically for could result in personal injury or death . CAUTION is used proper operation . This precaution will prevent problems m identify unsafe practices which would result in minor per - associated with no heat , such as frozen water pipes , etc . See sonal injury or product and prop - erty damage . NOTE is used " Before You Request a Service Call " section in this manual . to highlight suggestions which will result in enhanced instal - lafion , reliability or operation . To minimize the possibility of serious personal injury , fire , Fire Hazard ! Failure to keep insulation clear of furnace damage , or improper operation ; carefully follow furnace could result in fire , personal injury / death these safety rules : or property damage . • Your gas furnace uses air from outside the home for com - bustion and vents flue gas to the outdoors . It is not to be installed using indoor air for combustion . The vent and air - V ! I gll - ' 1 - ' l [ e ] intake pipes must terminate outside the structure and must not be obstructed in any way . Do not block or obstruct air Do not keep combustible materials , gasoline , and openings on furnace or spaces around the furnace . other flammable liquids or vapors around your furnace . Failure to follow this warning could result in fire , personal injury / death or property damage . For proper and safe operation the furnace needs air for combustion and ventilation . Do not block or obstruct the openings on the furnace , air openings to the area in which the furnace is in - stalled , and the space around the furnace . Failure to follow this warning could result in fire , personal injury / death or property damage . BEFORE STARTING YOUR FURNACE Examine the furnace installation to determine that : 1 . All flue gas carrying areas external to the funmce ( i . e . chimney , vent connector ) are clear and tree of obstruction s . 2 . The vent connector is in place , slopes upward and is phys - 5 ically sound without holes or excessive corrosion . • Keep the area around your furnace clear and flee of COln - 3 . The return - air duct connection ( s ) is physically sound , is bustible materials , gasoline , and other flammable liquids and sealed to the funmce casing , and terminates outside the vapors . space containing the furnace . 4 . The physical support of the funmce is sound without sag - ging cracks , gaps , etc . around the base . 5 . There are no obvious signs of deterioration of the furnace . 6 . The pilot and burner flames are in good adjustment ( by comparison with pictorial sketches or drawings of the main burner flame and , if applicable , the pilot burner flame ) . 6 4
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STARTING AND SHUTTING DOWN YOUR FURNACE Instead of a continuously burning pilot flame which wastes valuable energy , your furnace uses an automatic , hot surface ignition system to light the burners each time the thermostat starts your funlace . Follow these important safeguards : 9 10 3 . Turn OFF electrical supply to the furnace . ( See Fig . 10 . ) 4 . Remove main furnace door . ( See Fig . 11 . ) 7 • Never attempt to manually light the burners with a match or other source of flame . • Read and follow the operating instructions on inside of main funlace door , especially the item that reads as follows : Wait 5 minutes to clear out any gas . Then smell for gas , including near the floor . If you smell gas , STOP ! Follow " B " in the safety iufonnatiou above on this funmce label . If you don't smell gas , go to the next step . • If a suspected malfunction occurs with your gas control system , such as the burners do not light when they should , 11 refer to the shutdown procedures on inside of main funmce 5 . The gas valve will have a control switch to turn offand on . door , or in the " Shutting Down Your Furnace " section and Turn the control switch on the gas control to the OFF call your dealer as soon as possible . position and wait 5 minutes . ( See Fig . 12 or 13 . ) Then smell for gas , including near the floor . If you smell gas , STOP ! Follow " B " on funmce label . If you don't smell gas , go to next step . If overheating occurs or the gas valve fails to shut off the gas supply , turn off the manual gas valve to the furnace BEFORE turning off the electrical sup - ply . ( See Fig . 9 . ) Failure to follow this warning could result in a fire or explosion , and personal in - jury / death or property damage . CHECK AIR FILTER : Before attempting to start your furnace , be sure the furnace filter is clean and in place . See " Performing Routine Maintenance " section in this manual . Then proceed as follows : For 58MTA and 58MVP STEPS FOR STARTING YOUR FURNACE 12 1 . Set your room thermostat to the lowest temperature set - ting . ( See Fig . 8 . ) 2 . Close the external manual gas valve . ( See Fig . 9 . ) / - - For 58MCA and 58MXA 13
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Alter the hot surface igniter is heated for 17 seconds , the gas valve permits gas to flow to the main burners . Alter ignition and a time delay of about 60 sec , the furnace blower will start . Variable - capacity furnaces start at low speed until the control makes the necessary adjustments to operate the blower at either the low - or high - heat speed . NOTE : If the burners fail to ignite alter 4 attempts , the fu > nace control system will lock out . If lockout occurs , main burners fail to light , or blower does not come on , shut down the furnace and call your dealer for service . For 58MTA and 58MVP 12 . Set your thermostat to the temperature that satisfies 14 your comfort requirements . SUGGESTION : Setting the thermostat back a few degrees - - and compensating for the difference with warmer clothing - - can make a big difference in your fuel consumption . The few degrees at the top of your thermo - stat " comfort level " are the most costly degrees to obtain . When the room temperature drops below the temperature selected on the thermostat , the furnace will switch on auto - = i matically . When the room temperature reaches the tempera - ture selected on the thermostat , the furnace will be switched For 58MCA and 58MXA off automatically . 15 Some thermostats have a FAN mode with 2 selections : AUTO and ON . When set on AUTO , the furnace blower cycles on and off . In the ON mode , the furnace blower runs continu - 6 . Alter waiting 5 minutes , turn the control switch on the gas ously . Continuous fan keeps the temperature level in your control to the ON position . ( See Fig . 14 or 15 . ) home more evenly balanced . It also permits the indoor air to be continuously filtered . ComfortFan TM - On all but the 58MCA , the blower speed can be increased or decreased if desired due to change of seasons , large gatherings in your home , etc . Simply change your FAN flom ON to OFF for 1 to 3 seconds ( or AUTO depending on your thermostat ) , and then return to ON . The blower will switch to the next higher speed . There are at least 3 speeds to choose from . If the blower is running on its highest speed , a request to change will direct the blower to return to its lowest speed . SHUTTING DOWN YOUR FURNACE Should you ever need to shut down your furnace for service 16 or maintenance , you will need to turn the furnace off . The following procedures must be followed : 1 . Set your room thermostat to the lowest temperature setting . ( See Fig . 19 . ) f I 17 18 7 . Replace main furnace door . ( See Fig . 16 . ) 8 . Turn ON the electrical supply to the furnace and wait 1 J minute . ( See Fig . 17 . ) 19 9 . Open the external manual gas valve . ( See Fig . 18 . ) 2 . Close the external manual gas valve ( See Fig . 9 . ) 10 . Set the room thermostat to a temperature slightly 3 . Turn off electrical supply m the furnace . ( See Fig . 20 . ) above the room temperature . This will automatically signal the furnace to start . 4 . Remove main furnace door . ( See Fig . 11 . ) 11 . When the furnace receives the start signal , the inducer is 5 . Turn the switch on the gas control m the OFF position . started . When the pressure switch senses that there is suf - ( See Fig . 21 or 22 . ) ficient combustion air , the hot surface igniter is energized .
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basic maintenance functions such as cleaning and replacing air filters . All other operations must be performed by trained and qual - ified service agency personnel . Observe safety precautions in this manual , on tags , and on labels attached to the furnace , and other safety precautions that may apply . With proper maintenance and care , your furnace will operate economically and dependably . Instructions for basic mainte - nance are found on this and the following pages . However , before beginning maintenance , follow these safety precautions : 20 Turn off electrical power supply to your furnace before removing the access doors to service or perform maintenance . A failure to follow this warning could result in personal injury / death or property damage . For 58MTA and 58MVP Although special care has been taken to minimize 21 sharp edges , be extremely careful when handling parts or reaching into the furnace . Failure to follow this caution would result in minor personal injury . FILTERING OUT TROUBLE or Never operate your furnace without a filter in place . Doing so may damage the furnace blower motor . An accumulation of dust and lint on internal parts For 58MCA and 58MXA of your furnace can cause a loss of efficiency and 22 would cause minor property or product damage . A dirty air filter will cause a loss of airflow in your duct 6 . Replace the main furnace door . ( See Fig . 16 . ) system . When excessive loss of airflow occurs , the furnace 7 . If the timmce is being shut down because of a malfunc - may cycle on its safety controls . If this condition is left unat - tion , call your dealer as soon as possible . tended , the furnace will eventually lock out . It is recom - mended that the furnace air filter be checked every 3 or 4 weeks and cleaned if necessary . If installed with factory - specified disposable media filter , check or replace filter before each heating and cooling sea - Furnace is not to be installed , operated , and then sou . Replace disposable media filter at least once a year . turned off and left turned off in an unoccupied The air filter is normally located in the blower compartment structure during winter . ( See " Heading South for ( See Fig . 3 or 4 . ) or in the factory - supplied filter cabinet the Winter " procedures in maintenance section on attached to the side or bottom of the furnace casing . If air page 9 ) . Freeze damage to furnace would occur . filter has been installed in another location , contact your deal - er for instructions . To inspect , clean , aud / or replace the air PERFORMING ROUTINE filter ( s ) , follow these steps : MAINTENANCE 1 . Turn offelectrical supply m furnace . ( See Fig . 20 . ) NOTE : The qualified installer or agency must use only 2 . Remove door / access panel factory - authorized replacement parts , kits , and accessories • AIR FILTERS ( S ) LOCATED IN BLOWER COMPART - when modifying this product . MENT a . Remove main furnace door . ( See Fig . 23 . ) Installing and servicing heating equipment can be hazard - b . Remove blower access panel . ( See Fig . 24 . ) ous due to gas and electrical components . NOTE : It will be necessary to remove 2 screws Only trained and qualified personnel should install , repair , or • AIR FILTER LOCATED IN FILTER CABINET service heating equipment . Untrained personnel can perform
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a . Remove filter cabinet door ( See Fig . 25 and 26 . ) NOTE : It will be necessary to remove 1 thumbscrew 3 . Remove air filter from furnace . • AIR FILTER LOCATE [ ) IN BLOWER COMPARTMENT BOTFOM : a . Slide filter retainer sideways until it is fiee of latch . ( See Fig . 27 . ) b . Slide air filter out of lilmace . ( See Fig . 28 . ) • AIR FILTER ( S ) LOACTED IN BLOWER COMPART - MENT SIDE : a . Remove filter retainer from latch . ( See Fig . 29 . ) b . Gently remove air filter and caretillly turn the dirty side up ( if dirty ) to avoid spilling dirt fiom the filter . ( See Fig . 30 . ) • AIR FILTER LOCATE [ ) IN FILTER CABINET : 29 30 a . Slide air filter out of timlace . Keep dirty side up ( if dirty ) b ) Elecmmic air cleaner ( EAC ) - Refer to EAC Owner's to avoid spilling dirt . ( See Fig . 31 and 32 . ) Manual for maintenance information . 4 . Inspect the filter . If torn , replace it . 5 . If washable filter , wash filter ( if dirty ) in sink , bathtub , or out - NOTE : If washable filter that was shipped with the lilrnace has side with a garden hose . Always use cold tap water . A mild been replaced by : liquid detergent may be used if necessa U . Spray water a ) Factory specified disposable media filter - Do not clean . If through filter in the opposite direction of airflow . Allow filter dirty , replace only with media filter having the same part to dry . number and size . Install with airflow direction arrow point - 6 . Reinstall clean air filter ing towards blower . 7 . Reinstall filter retainer ( for blower compartment locations only ) 8 . Replace blower access panel and main furnace door ( See Fig . 33 and 34 . ) or filter cabinet door ( Fig . 35 and 36 . ) 9 . Turn on electrical supply to furnace . If your furnace air filter needs to be replaced , be sure to use a factory - authorized filter of the same size that was orginally sup - plied . Use the filter tables and compare your furnace size with the proper filter size . 23 24 31 32 25 26 33 34 27 28 8
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When dirt , soot , scale , or rust is allowed to build up , your fllr - nace can suffer a loss of efficiency and perform improperly . Accumulations on the main burners can result in firingout of normal sequence . This delayed ignition creates an alarmingly loud sound . If your furnace makes an especially loud noise when the main burners light , shut down your fur - nace and call your dealer . Failure to follow this caution would result in minor property damage . 35 36 To inspect the combustion area and vent system , you will need a flashlight . Refer m Fig . 3 or 4 , and proceed as follows : 1 . Turn off the gas and electrical supplies m the lhrnace and FURNACE AIR FILTER TABLE remove the main furnace door . ( See Fig . 9 , 10 , and 11 . ) AIR FILTER LOCATED IN BLOWER COMPARTMENT 2 . Remove burner enclosure front . ( See Fig . 37 or 38 . ) FURNACE FILTER SIZE ( IN ) Inspect the gas burners , igniter area , and remainder of flmmce CASING FILTER for dirt , rust , soot , or scale . WIDTH ( IN . ) Side Returnt Bottom Return TYPE 17 - 1 / 2 ( 1 ) 16x25x 1 " ( l ) 16x25x 1 ' _ Cleanable ¥ ! I [ IRIli e ] I 21 ( l ) 16x25xl ( l ) 20x 25 x 1 " Cleanable If dirt , rust , soot , or scale accumulations are found , 24 - 1 / 2 ( lor2 ) 16x25xl ( l ) 24x25xl * Cleanable call your dealer . Do not operate your furnace . Failure to follow this caution would result in minor property AIR FILTER LOCATED IN FILTER CABINET or product damage . FILTER CABINET FILTER FILTER 3 . Inspect the colnbustion - air and vent PVC pipes for sags , HEIGHT ( IN ) SIZE ( IN ) TYPE holes , cracks , or disconnections . Horizontal portions of 16 ( 1 ) 16 x 25 x 1 * Cleanable or pipes must slope downward toward funmce . or ( 1 ) 16 x 25 x 4 - 5 / 16 Disposable 20 ( 1 ) 20 x 25 x 1 " Cleanable or or ( 1 ) 20 x 25 x 4 - 5 / 16 Disposable 24 ( 1 ) 24 x 25 x 1 " Cleanable or or ( 1 ) 24 x 25 x 4 - 5 / 16 Disposable * Factory - provided with the tim / ace . Filters may he field modified by cutting - filter material and support rods ( 3 ) in filters . Alternate sizes and additional \ filters may be ordered from your dealer . " \ / ] - Upflow only . Downflow Upflow 37 38 4 . Reinstall burner enclosure front . Use care when cutting support rods in filters to 5 . If your flmmce is fiee of the above conditions , replace protect against flying pieces and sharp rod ends . main funmce door and turn on electrical and gas supplies Wear safety glasses , gloves , and appropriate pro - to the thrnace . ( See Fig . 16 , 17 , and 18 . ) tective clothing . Failure to follow this caution 6 . Start the flmmce and observe its operation . Watch the could result in personal injury . burner flames to see if they are clear blue , almost transpar - ent . ( See Fig . 36 . ) If you observe a suspected malfunction , COMBUSTION AREA AND VENT SYSTEM or the burner flames are not clear blue , call your dealer . If holes are found in the pipes or if any portion has become disconnected , toxic fumes can escape into your home . DO NOT OPERATE YOUR FURNACE . Call your dealer for service . Failure to follow this warning could result in personal injury or death . Visually inspect the combustion area and vent system before each heating season . Make sure that all PVC pipes leading into the combustion area and vent are tree from any cracks and sags . Check the Colnbustion - air intake and vent pipe on the outside of your home for blockage . 39
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HEADING SOUTH FOR THE WINTER ? 8 . Remove funnel and tube from inducer housing and DON'T FORGET YOUR FURNACE ! replace drain connection cap and clamp . 9 . Replace main furnace door . ( See Fig . 34 . ) 10 . Propylene glycol need not be removed before restarting furnace . If the furnace is installed in an unconditioned space where the ambient temperatures may be 32 ° F or A CHECK - UP CHECKLIST lower , freeze protection measures must be taken to Your timmce represents an important investment in your falni - prevent minor property or product damage . ly's comfort and your home's value . To keep it performing properly and to prevent future problems , have a trained service Since the furnace uses a condensing heat exchanger , some water specialist give your furnace a professional check - up annually . will accumulate in the unit as a result of the heat transfer process . The following checklist can be used as a guideline to proper Theret \ ) re , once it has been operated , it cannot be turned off and selwice : left off for an extended period of time when temperatures will • Inspect all flue gas passages , burners , heat exchangers , cou - reach 32 ° F or lower unless wimedzed . Follow these procedures pling box ( es ) , and inducer assembly . to winterize your furnace : • Inspect all combustion - air and vent piping inside StlUCture 1 . Obtain propylene glycol ( RV / swimming pool amifreeze and vent pipe termination outside the structure . or equivalent ) . • Check gas pipes leading to and inside of your filrnace for leaks . • Inspect and clean the blower motor and wheel . Do not use ethylene glycol ( Prestone II antifreeze NOTE : The inducer and blower motors are pre - lubricated and require no additional lubrication . These motors can be identified coolant or equivalent ) . Failure of plastic compo - by the absence ofoil ports on each end of the motor . nents will occur . • Inspect and change or clean air filters ( s ) if necessary . 2 . Turn off electrical supply to the furnace . ( See Fig . 20 . ) • Inspect all supply - and return - air ducts for obstructions , air 3 . Remove main furnace door . ( See Fig . 23 . ) leaks , and insulation . Remedy any problem when necessary . 4 . Remove upper inducer housing drain connection cap . • Inspect the return - air duct connections ( s ) at the furnace to en - ( See Fig . 40 . ) sure it is physically sound , sealed to the furnace casing , and ter - minates outside the space containing the fnrnace . • Inspect electrical wiring , connections , and components for loose connections . E : . . . . . . . . . . . . . . . . . . . . . . . . . • Pert \ ) rm an operational checkout to determine whether your furnace is working properly and if it requires adjustments . • Inspect all condensate drain tubes and condensate trap assem - bly for leaks . The condensate removal system should be cleaned annually by a qualified service agency . Refer to the Service and Maintenance Instl - uctions l \ _ r fnrther inl \ _ rmation . • Examine the physical support of the furnace . Support should 40 be sound with not cracks , sagging , gaps , etc . around the base . • Check furnace l \ _ r any obvious signs of deterioration . BEFORE YOU REQUEST A SERVICE CALL If your furnace is not operating or not performing properly , you may save the expense of a service call by checking a few things yourself before calling for service . FOR INSUFFICIENT AIRFLOW : • Check for dirty air filter ( s ) . • Check for blocked return - air or supply - air grilles throughout your home . Ensure they are open and unobstructed . 41 If problem still exists , call your dealer for service . 5 . Connect field - supplied l / 2 - in . ID tube to upper inducer housing drain connection . IF FURNACE FALLS TO OPERATE : 6 . Insert field - supplied funnel into tube . Follow this checklist step by step , advancing to the next step 7 . Pour 1 quart of anfifieeze into funnel / tube . Antifreeze only if furnace thils to start . should run through inducer housing , overfill condensate • Check thermostat for proper temperature . Is thermostat set trap , and flow into open field drain . ( See Fig . 41 . ) above room temperature ' ? 10
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• Is thermostat set on HEAT ' ? • Check for obstructions around the vent termination . • Check fuses and circuit breakers . Is electrical supply o11 ' ? If the furnace still fails to operate , call your service represeuta - five . • Is manual shutoff valve in gas supply pipe in open position ? ( Follow start - up procedures if you open gas valve . ) For your convenience , record the furnace product and serial numbers on back page . Should you ever require service , you NOTE : Turn off electrical supply before continuing with will have ready access m the information needed by your ser - checklist . vice representative . • Is control switch oll gas wllve in ON position ? ( Follow start - This li | rnace has a light - elnitting - diode ( LED ) status code dis - up procedures if you must reset switch m ON position . ) play to aid the installer , sew - ice technician , or homeowner while • Check manual reset flame rollout switch located on the burner installing or stow - icingthe unit . The LED code can be seen by box . ( See Fig . 3 or 4 . ) If furnace has experienced high temper - removing the main furnace door and viewing the LED through ature conditions , this switch will shut off the furnace . Reset it the view port in the blower access panel . by pushing the button on the switch . If it trips again , shut down the furnace and call for service . See " Shutting Down Your Fur - nace " section in this manual . 11
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INSTALLATION DATA AIR CONDITIONER OR HEAT PUMP Date Installed OUTDOOR UNIT : Dealer Name Product No . Address Model No . Serial No . city INDOOR COIL : State Zip Product No . Telephone FURNACE Model No . Product No . Serial No . Model No . Serial No . Carrier A United Technologies Company TO OBTAIN INFORMATION ON PARTS : Consult your Installing dealer or the classified section of your local telephone directory under the " Heating Equipment " or " Air Conditioning Contractors & Systems " heading for dealer listing by brand name . Have available the Model No . , Series Letter , & Serial No . of your equipment to ensure correct replacement part . Carrier Corporation 7310West Morris St . Indianapolis , IN 46231 Manufacturer reserves the right to dlsconUnue , or change at any time , specifications or designs without notice and without Incurring obligations . Copyright 2003 Carrier Corporation Form : OM58 - 108 Replaces : OM58 - 106 Printed in the U . S . A . 10 - 03 PC 101 Catalog No . 535 - 80115
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