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708967-0 G7 User manual.indd
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1. Pressure Switches Transformer MQ 97 Upflow Horizontal Gas Furnace EFFICIENCY RATING CERTIFIED ama 7089670 NORDYNE Specifications and illustrations subject to change without notice or incurring obligations O Fallon MO 708967 Printed in U S A 10 08
2. NOTE Should the gas supply fail to shut off or if overheating occurs shut off the gas valve to the furnace before shutting off the electrical supply WARNING All gas piping and shutoff valves must be installed in compliance with local codes and utility regulations by licensed installers DO NOT attempt to modify or tap into existing gas lines yourself Fire or explosion may result causing property damage personal injury or loss of life Failure to follow the safety warnings exactly could result in serious injury death or property damage WHAT TO DO IF YOU SMELL GAS e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Leave the building immediately e Immediately call your gas supplier from a neighbors phone Follow the gas suppliers instructions e 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 WARNING The furnace was shipped from the factory equipped to operate on natural gas Conversion to LP propane gas must be performed by a licensed HVAC technician using a factory supplied conversion kit Failure to use the proper conversion kit can cause fire explosion property damage carbon monoxide poisoning personal injury or death INSPECTION Your furnace and its venting system should be inspected annually by a license
3. safe operation this furnace requires unrestricted airflow for combustion and ventilation Do not block or obstruct air openings on the furnace air openings around the furnace area or the spacings around the furnace N WARNING Do not reduce the supply of fresh air to the furnace This could create the production of excessive amounts of Carbon Monoxide a colorless odorless gas that is a deadly poison that could result in serious personal injury or death Do not block any openings that are supplying fresh air to the room or closet the furnace is in If your furnace obtains its air through a pipe to the outdoors do not allow the inlet of the pipe to become blocked CLEARANCES TO COMBUSTIBLES The furnace is designed to have certain clearances to combustible items such as wood paper etc Some types of insulation are combustible If your furnace is installed in an attic near unfinished walls or in other insulated space keep area surrounding the furnace free of insulating material N WARNING Donotplace combustible materials on or against the furnace cabinet or within 6 inches of the vent pipe Furnace area must be kept clear and free of combustible materials gasoline and other flammable vapors and liquids A fire or explosion may result causing property damage personal injury or loss of life Failure to follow the safety warnings exactly could result in serious injury death or property damage FLOOD DAMAGE N WARN
4. GAS FURNACES USER MANUAL Single Stage Two Stage and Modulating Furnaces ke ENERGY STAR 80 AFUE High Efficiency Furnaces SA TA Upflow Horizontal SK TK Downflow BSP BD 92 1 AFUE Condensing Furnaces SC Upflow Horizontal SL Downflow 95 1 AFUE Condensing Furnaces TC Upflow Horizontal TL Downflow 97 AFUE Modulating Furnaces MQ Upflow Horizontal A WARNING FIRE OR EXPLOSION HAZARD e Failure to follow safety warnings exactly could result in serious injury or property damage e Installation and service must be performed by a qualified installer service agency or the gas supplier e 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 e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Leave the building immediately e Immediately call your gas supplier from a neighbors phone Follow the gas suppliers instructions e If you cannot reach your gas supplier call the fire department READ ALL INSTRUCTIONS THOROUGHLY KEEP IN A SAFE PLACE FOR FUTURE REFERENCE ve 92 1 95 1 and 97 AFUE Models Only Congratulations on the purchase on your new furnace With our dedication to quality superior reliability and outstanding warranty we know you will be pleased with this new appliance This furnace has be
5. ING Donotuse this furnace if any part has been under water A flood damaged furnace is extremely dangerous Attempts to use the furnace can result in fire or explosion A qualified service agency should be contacted to inspect the furnace and to replace all gas controls control system parts electrical parts that have been wet or the furnace if deemed necessary FILTERS WARNING Never operate the furnace without a filter in place Accumulating dust in the return air can build up on internal components resulting in loss of efficiency equipment damage and possible fire e Air filter s are not supplied with the furnace as shipped from the factory The installer must provide a high velocity filter and rack for a filter in the return air duct adjacent to the furnace or in a return air grill to the furnace The furnace should always have a clean filter located either at the air return on the furnace or in an air return register in your habitable space If the filter becomes dirty it should be cleaned or replaced SAFETY INFORMATION e New or newly renovated homes may require more frequent changing until the construction dust has minimized Filters designed to remove smaller particles such as pollen may require additional maintenance GAS SUPPLY AND PIPING This furnace does not have a pilot It is equipped with an ignition device which automatically lights the burner DO NOT light the burner by hand IMPORTANT
6. ce The component you need to familiarize yourself with is the gas valve You will use this to turn the furnace on and off There are no user serviceable parts All repairs must be done by a licensed HVAC technician VENTING SYSTEM This furnace is designed to fulfill the requirements of being classified as either a Category or Category IV furnace These classifications are related to the furnace s Annual Fuel Utilization Efficiency AFUE rating the percentage of fuel that is converted into usable heating energy Category Furnaces These furnaces typically have an AFUE rating of about 80 and may be vented through a properly designed metal vent or masonry chimney This venting system needs to be primarily vertical so that the hot combustion products will develop a natural upwards draft action Category IV Furnaces Category IV furnaces typically have an AFUE rating over 90 and are mainly vented through plastic PVC pipe These furnaces also produce liquid condensate which is slightly acidic The vent piping must be sloped upwards away from the furnace to properly drain the condensate back to the condensate disposal system THERMOSTATS This family of furnaces includes single stage two stage and modulating capabilities These different capabilities require different thermostats to reach their best performance Single stage furnaces SA SK SC amp SL models should be controlled by a conventional single stage thermostat Tw
7. cy of maintenance VENTING SYSTEM e Existing masonry chimneys should be inspected and relined if necessary Vent pipe must slope upwards and be physically sound without holes or corrosion Any corroded section of vent pipe must be replaced and any obstruction or blockage must be removed by a licensed HVAC technician Flue passageways the vent system and the burners should be inspected and cleaned if required by a licensed HVAC technician annually to ensure continued safe operation BLOWER AND FILTER It is recommended that the blower compartment be cleaned of dirt or lint that may have accumulated in the compartment or on the blower and motor as part of the annual inspection AIR FOR COMBUSTION e For proper and safe operation the furnace needs air for combustion and ventilation Do Not block or obstruct air openings on the furnace or any air openings where the furnace may be installed including any surrounding spaces Direct vent furnaces pull combustion air from the outdoors and vent combustion products back outside Combustion air coming from the outside needs to be clean of chemicals that can cause corrosion such as pool chlorinating products AIR FOR COMFORT e Keep air filters cleaned It is recommended that the furnace air filter be checked at least once a month Clean or replace filter to maintain proper airflow and achieve maximum efficiency e Furniture and drapery should be arranged so that the supply air regis
8. d HVAC technician The filter should be inspected at least once a month See page 7 for Items that should be inspected by the homeowner VENTING SYSTEM A WARNING It is imperative to maintain proper operation of the venting system including the masonry chimney if applicable Insufficient venting could create the production of excessive amounts of Carbon Monoxide acolorless odorless gas that is a deadly poison that could result in serious personal injury or death SHUTTING DOWN THE FURNACE Should you ever need to shut down your furnace for service or maintenance shut off the gas valve to the furnace before shutting off the electrical service Your furnace may be equipped with one of three types of gas valves Remove the door panel from the front of the furnace and determine which valve type matches your installation in Figure 1 Either move the switch or turn the knob to the OFF Position Additional instructions for shutting down the furnace can be found on page 7 If your installation has a manual gas shutoff valve on the gas supply pipe shut this off then shut off the electric to the furnace SINGLE STAGE VALVE TWO STAGE VALVE MODULATING VALVE Figure 1 Gas Valves COMPONENT INFORMATION The furnace components shown on pages 9 11 will help to identify and locate various parts of the furna
9. en designed and built to provide many years of safe and dependable home comfort providing it is properly installed and regular maintenance has been performed Improper use or insufficient maintenance can shorten the life of the furnace and result in serious personal injury or property damage Please read this manual thoroughly and familiarize yourself with the safety operation and maintenance procedures for this furnace TABLE OF CONTENTS SAFETY INFORMATION eeeeeeeeeees 4 JINSPEG TION asien 7 Air for Proper Combustion 4 FIEBIENEYV nee 7 Clearances to Combustibles 4 Venting System isses 7 Flood Damage 22222222444444444440000 4 Blower and Filter eeeeeee 7 Plesk 4 Air for Combustion uu 2 es2u0 7 Gas Supply and Piping 5 Air for Comfort ui 7 WAS PO CUO Eee 5 Maintenance Table uun 8 Venting System 5 Burner Operation 222444444444HH nen gt 8 Shutting Down the Furnace 5 New Construction sceccvccsverorcsdeesewvstaxoancs 8 COMPONENT INFORMATION 6 Furnace and Air Ducts 224 8 Venting System uunnnnssnnnnnneennn nn 6 TROUBLESHOOTING ccccesssssseeeeees 8 Category Furnaces 6 LOCATION OF SINGLE STAGE FURNACE Category IV Furnaces ne 6 COMPONENTS ssssssesssssessseessssecsseesssneesse I
10. hermosab anne 6 LOCATION OF TWO STAGE FURNACE COMBUSTION AIR REQUIREMENTS 6 COMPONENTS Enno 10 Sources of Corrosion 2440uuumnn nenn 6 LOCATION OF MODULATING FURNACE Furnace in Small Room or Closet 6 COMPONENTS uunnunnuunuuunnunnanuununnnnnnnunnn 11 STARTUP AND SHUTDOWN ccsseeees 7 Starting the Furnace s 7 Shutting Down the Furnace 7 SAFETY INFORMATION Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored WARNING indicates a potentially hazardous situation that if not avoided could result in personal injury or death CAUTION indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury or property damage WARNING The safety information listed below must be followed during the installation service and operation of this furnace Failure to follow safety recommendations could result in possible damage to the equipment serious personal injury or death WARNING PROPOSITION 65 WARNING This product contains chemicals known to the state of California to cause cancer birth defects or other reproductive harm N WARNING This furnace is not approved for installation in mobile homes Installing this furnace in a mobile home could cause fire property damage and or personal injury AIR FOR PROPER COMBUSTION For proper and
11. in compliance with supplying adequate air for combustion By erecting new walls itis sometimes possible to inadvertently restrict the furnace s air supply You can find more information about supplying combustion air in the NFGC which is available at many libraries SOURCES OF CORROSION It is known that certain common household chemicals can cause heat exchanger corrosion ifthe vapors are pulled into the furnace s burners The following is a list of chemicals that should not be used or stored near the furnace Do not store these chemicals near the furnace e Permanent wave solutions Chlorinated waxes and cleaners Chlorine based swimming pool chemicals Water softening chemicals De icing salts or chemicals Carbon tetrachloride Halogen type refrigerants Cleaning solvents perchloroethylene Printing inks paint removers varnishes etc Hydrochloric acid Cements and glues Antistatic fabric softeners e Masonry acid washing materials FURNACE IN A SMALL ROOM OR CLOSET If a furnace is installed in relatively small utility room or closet the installation needs openings in the walls or door to let combustion air in Make sure that these openings remain unobstructed Do not modify these openings in any way without consulting a licensed HVAC technician STARTUP AND SHUTDOWN STARTING THE FURNACE Make sure the filter is clean and in place Make sure the vent system is properly installed Set the thermostat to the lowest se
12. o stage furnaces TA TK TC amp TL models will perform best with a conventional two stage thermostat However it is possible to also control two stage furnaces with a single stage thermostat Both thermostats are commonly available at your local building supply store Consult with your installer about which type is best for your installation The modulating MQ furnaces will not work with a conventional thermostat and must be controlled by an iQ thermostat available through your dealer COMBUSTION AIR REQUIREMENTS CAUTION Do not reduce the supply of fresh air to the furnace It is extremely important that the furnace receives an unobstructed flow of clean fresh air to properly burn the fuel gas If this flow of air is restricted the partially burned combustion gases may create dangerous amounts of carbon monoxide a colorless odorless gas that is a deadly poison that can cause personal injury or death Air openings on top of the furnace and openings in closet doors or walls must never be restricted If the furnace is operated without adequate air for combustion the flame roll out switch will open turning off the gas supply to the burners This indicates that a serious problem with the burners has occurred and must be corrected immediately Only a licensed HVAC technician can reset this switch Before remodeling near the furnace consult with a local code official or the National Fuel Gas Code to make sure you will be
13. pections The duct work must be inspected and cleaned if found to contain any construction debris FURNACE AND AIR DUCTS Homeowners should perform frequent visual inspections of the furnace for obvious signs of deterioration The furnace should be sound without sagging cracks gaps etc around the base The return air duct connection s is secured and sealed to the furnace cabinet and terminates outside the area containing the furnace Any signs of damage or loose connections should be repaired by a qualified HVAC technician TROUBLESHOOTING If the furnace fails to operate check the following 1 Is the thermostat setting correct 2 Are the blower compartment door s in place 3 Has the circuit breaker tripped or the control board fuse burned open 4 Is the gas turned on at the manual shutoff 5 Is the filter dirty or clogged If the furnace still doesn t operate contact a licensed HVAC technician LOCATION OF SINGLE STAGE FURNACE COMPONENTS SA 80 Upflow Horizontal Gas Furnace SK 80 Do
14. ters and return grilles are not obstructed BEGINNING OF EACH END OF EACH meem u o o HEHE materials BB E not restricted merrer s CH of ihe furnace a E E BE HERE vent or chimney MAINTENANCE ITEM Verify no holes or cracks in vent pipe no holes or cracks in vent pipe Verify no corrosion in vent pipe a a a ce SE Verify the horizontal vent pipes slope ne away from furnace Verify burner flame burner flame Clean or replace tere as E BE zu Clean blower compartment E T Clean burner assembly Clean condensate collection and disposal system if applicable Table 1 Maintenance Table BURNER OPERATION Perform the startup instructions on page 7 The igniter should ignite the closest burner and the flames should quickly carryover to the other burners The flames should be bright blue with occasional yellow streaks NEW CONSTRUCTION The operation of gas furnaces in a construction environment can cause a variety of problems with the furnace Before occupying the residence homeowners should have these safety inspections performed by a licensed technician The filter must be replaced or cleaned and the furnace must be inspected by a licensed HVAC technician The furnace must be cleaned and or repaired if found to be dirty damaged or malfunctioning in any way Before occupancy the furnace shall be inspected and ap proved by applicable local authority even if this results in redundant ins
15. tting Close the manual gas valve outside the furnace Turn off all electric to the furnace Remove the door from the burner compartment Set the gas valve switch or knob to the OFF position See Figure 2 for gas valve switch or knob location 8 Wait5 minutes If there is any smell of gas see WHAT TO DO IF YOU SMELL GAS on page 5 9 Set the gas valve switch or knob to the ON position 10 Turn on all electric to the furnace 11 Open the manual gas valve NOoR ON SINGLE STAGE VALVE TWO STAGE VALVE Figure 2 Gas Valves 12 Turn the thermostat back up to force ignition 13 Observe operation including burners If burners fail to ignite call a licensed HVAC technician 14 Replace the door on the burner compartment SHUTTING DOWN THE FURNACE Should you ever need to shut down your furnace for service or maintenance follow these steps Set the thermostat to the lowest setting Close the manual gas valve outside the furnace Turn electric to the furnace off Open the door to the burner compartment Set the gas valve switch or knob to the OFF position Replace the door on the burner Compartment Oe O ID D LI MODULATING VALVE INSPECTION FREQUENCY The furnace should be inspected annually by a licensed HVAC technician Table 1 page 8 contains suggested inspections and frequen
16. wnflow Gas Furnace 3 Bonerassemoy 5 FameRolouswicn o casvave 10 Pressure swion 2 einer Boor swor 6 Feme sensor 10 Jome ia ransom 3 Bumerassemoy 7 Fumace ContorBoara 11 mawwerassemiy SC 92 1 Upflow Horizontal Gas Furnace SL 92 1 Downflow Gas Furnace LOCATION OF TWO STAGE FURNACE COMPONENTS TA 80 Upflow Horizontal Gas Furnace TK 80 Downflow Gas Furnace TC 95 1 Upflow Horizontal Gas Furnace TL 95 1 Downflow Gas Furnace LOCATION OF MODULATING FURNACE COMPONENTS e Flame sens e Gas weniod e Gasvave SCS
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