708930-0 G7 User manual - Export.indd
Contents
1. any way without consulting a licensed HVAC technician 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 setting Close the manual gas valve outside the furnace Turn off all electric to the furnace Remove the door from the burner compartment Move the switch on the gas valve to the OFF position See Figure 2 for valve switch location Wait 5 minutes If there is any smell of gas see WHAT TO DO IF YOU SMELL GAS on page 4 9 Move the switch on the gas valve to the ON position 10 Turn on all electric to the furnace 11 Open the manual gas valve 12 Turn 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 non PWN Shutting Down the Furnace Should you ever need to shut down your furnace for service or maintenance follow these steps 1 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 Move the switch on the gas valve to the OFF position See Figure 1 on page 4 for valve switch location 6 Replace the door on the burner Compartment o ROI INSPECTION Frequency The furnace should be inspected annually by a licensed HVAC technician Homeowners2. not have a pilot It is equipped with an ignition device which automatically lights the burner DO NOT try to light the burner by hand BEFORE OPERATING smell all around the furnace area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle to the floor N 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 Failureto follow the safety warnings exactly could result in serious injury death or property damage N 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 Combustibles N WARNING Do not place combustible material on or against the furnace cabinet or within 6 inches of the vent pipe Do not place combustible materials including gasoline and any other flammable vapors and liquids in the vicinity of the furnace The furnace is designed to have certain clearances to combustible items such as wood paper etc Some types of insulation are combustible I
3. 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 Sources of Corrosion It is known that certain common household chemicals can cause heat exchanger corrosion if they are pulled into the furnace s burners STARTUP AND SHUTDOWN 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 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 Masonry acid washing materials Furnace in 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
4. Gas Furnaces USER MANUAL G7XA Upflow Horizontal High Efficiency Furnaces G7XC Upflow Horizontal Condensing Furnaces Y DS AP PPD 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 been 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 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 FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury 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 lig
5. ONENTS G7XA Upflow Horizontal Gas Furnace G7XC Upflow Horizontal Condensing Gas Furnace Blower Assembly Gas Manifold 11 Motor Choke Blower Door Switch Gas Valve 12 Motor Control Board Burner Assembly Igniter 13 Pressure Switch Furnace Control Board Inducer Assembly 14 Roll Out Switch Flame Sensor Limit Switch 15 Transformer 7089300 7089300 NORDYNE Specifications and illustrations subject to change without notice O Fallon MO and without incurring obligations Printed in U S A 8
6. e 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 Thefurnace should always have a clean filterlocated 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 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 DESCRIPTION OF FURNACE Furnace Components The furnace components on page 8 will help you locate the different parts of the furnace The control 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 should be done by a licensed HVAC technician Venting System This furnace is designed to fulfill the requirements of being classified as either Category or a Category IV furnace COMBUSTION AIR REQUIREMENTS AN CAUTION Do not reduce the supply of fresh air to the furnace It is extremely important that the furnacereceives 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
7. f your furnace is installed in an attic near unfinished walls or in other insulated space keep area surrounding the furnace free of insulating material Do not put insulation on your furnace SAFETY INFORMATION Flood damage N WARNING 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 Shutting Down the Furnace Should you ever need to shut down your furnace for service or maintenance shut off the gas at the gas valve first by moving the switch to the OFF Position Figure 1 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 Figure 1 Gas Valve Inspection Your furnace and its venting system should be inspected annually by a licensed HVAC technician The filter should be inspected at least once a month See the section about inspections Page 8 that you can do yourself Filters N 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 Air filter s are not supplied with th
8. ht any appliance Do not touch any electrical switch do not use any phone in your building 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 Table of Contents currit e Air tor Probar COMPUSO Flam mable ADDS iaa A e uM Bas Supply and PIDIO nn E CoOmbustIDlSS erario Flood Damage ine aa bunte pii m A RP EC TN gi Description of Furnace f c Furnaces COMPONER nennen Venting SISI NERO COMDUSTION Air Reg aa en Sauces of CO OSI sia R E Furnace in Small Room or Ian EU and ShUtdOWN ni Staring the NC A PA er Sh tting Down the Furnace ee ee NPS DS CUO am Me e MI IT ee SNNT A inh Accs rar aptsed A E T E elec dcl dite Eee P gode qq eo Rocco E O AAA PPP aun shshcndneseucesbastakstahind stat teanacesneeiceceacsds zinc AMON New COnsStrUCtHON ENTE O II TEDESCO lie Location of Furnace Components ci ii SAFETY INFORMATION N WARNING The safety information listed throughout this manual must be followed during the installation serv
9. ice and operation of this furnace Failure to follow safety recommendations could result in possible damage to the equipment serious personal injury or death Air for Proper Combustion 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 Flammable Vapors N WARNING Donotplace combustible materials on or against the furnace cabinet or within 6 inches of the vent pipe Do not place combustible materials including gasoline or any other flammable vapors and liquids in the vicinity of the furnace 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 Venting System N WARNING It is imperative to maintain proper operation of the venting system Insufficient venting 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 Gas Supply and Piping This furnace does
10. n grilles are not obstructed 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 FREQUENCY OF MAINTENANCE BEGINNING OF EACH HEATING SEASON END OF EACH HEATING SEASON MONTHLY Verify furnace area is free of combustible materials Verify combustion and ventilation air is not restricted XK Verify no signs of physical deterioration of the furnace X X x Verify no obstructions or restrictions in vent or chimney o X X Verify no holes or cracks in vent pipe ESE Jo x O Verify no corrosion in vent pipe ES Te n ee Verify the horizontal vent pipes slope upwards away from furnace X O EEE A Clean o replace Men Clean blower compartment RA Clean bumer assembly X LE Clean condensate colon and disposal system rappieabie X Table 1 Maintenance Table TROUBLESHOOTING If the furnace fails to operate check the following 4 1 Is the thermostat operating properly 5 2 Are the blower compartment door s in place 3 Has the circuit breaker tripped or the control board fuse burned open Is the gas turned on at the manual shutoff Is the filter dirty or clogged If the furnace continues to not operate contact a licensed HVAC technician LOCATION OF FURNACE COMP
11. should perform frequent visual inspections Table 1 contains suggested inspections and frequency of maintenance Venting System Existing vent pipes should be inspected and any corroded sections must be replaced Obstructions 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 MAINTENANCE ITEM Air for Combustion 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 Keep air filters cleaned It is recommended that the furnace air filter be checked atleast once a month Clean or replace filter to maintain proper airflow and achieve maximum efficiency Furniture and drapery should be arranged so that the supply air registers and retur
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