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Provides safety information, including warnings about carbon monoxide poisoning, recognizing early symptoms, and natural gas leak odor limitations. Gives required actions if gas is smelled, restrictions on fuel type and installation locations, minimum clearances from flammable materials, and guidance on using control knob LOW/HIGH locked positions and admitting fresh air by opening a window.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/vent-free-natural-gas-heater-owners-operation-and-installation-manual-model-cgn12/651701/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/vent-free-natural-gas-heater-owners-operation-and-installation-manual-model-cgn12/651701.png","ImageObject",300,407,{"name":92,"@type":93},"Stanford","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-13","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What should you do immediately if you smell gas?","Question",{"text":113,"@type":114},"Shut off the gas supply, do not try to light any appliance, and avoid touching electrical switches or using phones in the building. Call your gas supplier from a neighbor’s phone; if unreachable, call the fire department.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Why is carbon monoxide a serious risk with this heater?",{"text":118,"@type":114},"Carbon monoxide poisoning may lead to death and early symptoms resemble the flu, such as headaches, dizziness, or nausea. If symptoms occur, get fresh air at once and have the heater serviced.",{"name":120,"@type":111,"acceptedAnswer":121},"Where must the heater not be installed and what clearances are required?",{"text":122,"@type":114},"Do not install it in sleeping quarters, mobile homes, or recreational vehicles, and do not install where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the heater. Never use it as a fireplace insert or in high-traffic or windy/drafty areas.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},651701,1792897816,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":26,"preview_page_count":4},2336477552062,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","| \u003Cbr>\u003Cbr>\u003Cbr>VENT-FREE NATURAL GAS HEATER\u003Cbr>OWNER’S OPERATION AND INSTALLATION MANUAL\u003Cbr>\u003Cbr>Model: CGN12 |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  | WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.\u003Cbr>|  |\n|  |  | WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. |  |  |  |  |  |\n|  | — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.\u003Cbr>— WHAT TO DO IF YOU SMELL GAS\u003Cbr>• Do not try to light any appliance.\u003Cbr>• Do not touch any electrical switch; do not use any phone in your building.\u003Cbr>• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.\u003Cbr>• If you cannot reach your gas supplier, call the fire department.\u003Cbr>— Installation and service must be performed by a qualified installer, service agency, or the gas supplier. |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |  |\n|  |  |  | Save this manual for future reference |  |  |  |  |\n\n\n| CONTENTS\u003Cbr>SAFETY INFORMATION |  | SECTION PAGE\u003Cbr>Safety Information ......................................................................... 2\u003Cbr>Product Identification   4\u003Cbr>Local Codes   4\u003Cbr>Unpacking ...................................................................................... 4\u003Cbr>Product Features   4\u003Cbr>Installing To Wall .......................................................................... 5\u003Cbr>Connecting To Gas Supply ............................................................ 9\u003Cbr>Checking Gas Connections ............................................................ 10\u003Cbr>Operating Heater ........................................................................... 12\u003Cbr>For Your Safety Read Before Lighting ................................... 12\u003Cbr>Lighting Instructions ............................................................... 12\u003Cbr>To Select Heating Level .......................................................... 14\u003Cbr>To Turn Off Gas To Appliance ............................................... 15\u003Cbr>Manual Lighting Procedure .................................................... 15\u003Cbr>Inspecting Burner .......................................................................... 15\u003Cbr>Pilot Flame Pattern   15\u003Cbr>Burner Flame Pattern   16\u003Cbr>Cleaning And Maintenance ........................................................... 17\u003Cbr>Troubleshooting ............................................................................. 17\u003Cbr>Technical Service   20\u003Cbr>Specifications ................................................................................ 21\u003Cbr>Service Hints   21\u003Cbr>Replacement Parts ......................................................................... 21\u003Cbr>Parts Centrals   22\u003Cbr>Service Publications   22\u003Cbr>Accessory ...................................................................................... 22\u003Cbr>Parts List   23\u003Cbr>Illustrated Parts Breakdown   23\u003Cbr>Warranty Information .................................................................... Back Cover |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  ! WARNINGS\u003Cbr>IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, and carbon monoxide poisoning.\u003Cbr> ! DANGER Carbon monoxide poisoning may lead to death!\u003Cbr>Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the h","cbCaipoQmGuCLshZ","https://ap.wps.com/l/cbCaipoQmGuCLshZ","pdf",213175,24,"English","# Safety Information\n## Product Identification\n## Local Codes\n## Unpacking\n## Product Features\n## Installing To Wall\n## Connecting To Gas Supply\n## Checking Gas Connections\n## Operating Heater\n## Lighting Instructions\n## Cleaning And Maintenance\n## Troubleshooting\n## Technical Service\n## Specifications\n## Warranty Information","[{\"question\":\"What should you do immediately if you smell gas?\",\"answer\":\"Shut off the gas supply, do not try to light any appliance, and avoid touching electrical switches or using phones in the building. Call your gas supplier from a neighbor’s phone; if unreachable, call the fire department.\"},{\"question\":\"Why is carbon monoxide a serious risk with this heater?\",\"answer\":\"Carbon monoxide poisoning may lead to death and early symptoms resemble the flu, such as headaches, dizziness, or nausea. If symptoms occur, get fresh air at once and have the heater serviced.\"},{\"question\":\"Where must the heater not be installed and what clearances are required?\",\"answer\":\"Do not install it in sleeping quarters, mobile homes, or recreational vehicles, and do not install where curtains, furniture, clothing, or other flammable objects are less than 36 inches from the front, top, or sides of the heater. Never use it as a fireplace insert or in high-traffic or windy/drafty areas.\"}]","VENT-FREE NATURAL GAS HEATER - Owner’s Operation and Installation Manual - Model CGN12 | PDF",1792876167]