[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-393688-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-393688-en":131},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","hartzell-gas-fired-door-heater-series-79-installation-maintenance-manual","HARTZELL Gas Fired Door Heater - Series 79 - Installation & Maintenance Manual","","Installation & maintenance manual for the Hartzell Gas-Fired Door Heater, Series 79 (models DH22 and DH24), providing identification of wiring components and key safety-control parts such as flame safeguard, differential pressure monitoring, motor starter, safety shutoff gas valve, low/high gas pressure switches, temperature limit, gas pilot valve, and UV flame scanner. Describes product purpose, combustion discharge characteristics, allowable mounting positions, mechanical installation guidance, sizing considerations for door openings, and critical precautions regarding intake air and negative pressure conditions. Includes installation notes for gas pressure regulation and regulator venting.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/hartzell-gas-fired-door-heater-series-79-installation-maintenance-manual/393688/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/hartzell-gas-fired-door-heater-series-79-installation-maintenance-manual/393688.png","ImageObject",300,407,{"name":42,"@type":43},"Guten tag","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-22","2026-09-26",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",17,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is the purpose of the Hartzell Gas-Fired Door Heater in cold weather?","Question",{"text":63,"@type":64},"It directs a high velocity of heated air toward a large door opening when the door is opened in cold weather.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What mounting and cabinet orientation rules apply to the burner and control cabinet?",{"text":68,"@type":64},"The standard unit can be installed at any angle between horizontal and vertical down airflow; when facing the airstream, the control cabinet is on the left and the back panel must remain in a vertical plane (the cabinet cannot be rotated by rolling it toward the top or bottom of the burner house).",{"name":70,"@type":61,"acceptedAnswer":71},"Why can’t a door heater replace a tempered intake air unit?",{"text":72,"@type":64},"No door heater can substitute for a Tempered Intake Air Unit; if in-plant negative pressure exists due to exhaust ventilation, a makeup air unit must be provided so the door heater can function properly.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},393688,1790456914,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,105,110,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":103,"slug":104},6,50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":97,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":102,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":124,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":145},687212321768,"https://ap-avatar.wpscdn.com/avatar/a0010bdbe886d2fe77?x-image-process=image/resize,m_fixed,w_180,h_180&k=1789897067658708522","INSTALLATION & MAINTENANCE MANUAL  \nGAS FIRED DOOR HEATER  \nSeries 79, DH22 AND DH24  \nDM018  \nREV 4/23/18  \nOrder \\# Model \\# Mounting Position  \nWiring Dia. Symbol MFR’S NAME PART NO. PUBLICATION NO. DESCRIPTION  \n\n|  | HARTZELL |  | DM018 | INSTALLATION INSTRUCTIONS |\n| --- | --- | --- | --- | --- |\n| CRE | HONEYWELL | RM7890AI056 |  | FLAME SAFEGUARD |\n| FLS | ANTUNES | 8024204046 | SMDJ | DIFFERENTIAL PRESSURE WATCH |\n| M | CUTLER HAMMER | XTCE SERIES SEE\u003Cbr>WIRING DIA. |  | MOTOR STARTER WITH OVERLOADS |\n| IV | ASCO | JB8214250C |  | SAFETY SHUTOFF GAS VALVE W/POC |\n| IPS | ANTUNES | 8103116202 |  | MANUAL LOW GAS PRESSURE SWITCH |\n| 2PS | ANTUNES | 8101111202 |  | MANUAL HIGH GAS PRESSURE SWITCH |\n| 2THS | THERM-O-DISC | 60T14-61-1206 |  | HI TEMPERATURE LIMIT |\n| 2V | ASCO | SV311A02N6BF5 | V8523R1 | GAS PILOT VALVE |\n| SC | HONEYWELL | C7027A1072 | FORM102 | ULTRA-VIOLET SCANNER (FLAME SENSOR) |\n|  | HARTZELL |  | E029REV 19 | WIRING SCHEMATIC/BILL OF MATERIAL |\n|  | HARTZELL |  | EP01 REV 3 | PLUMBING DIAGRAM W/BILL OF MATERIAL |\n|  | HARTZELL |  | DM018 | INSTALLATION AND OPERATION MANUAL |\n\n1-800-336-3267  [www.hartzell.com](www.hartzell.com)  [info@hartzell.com](info@hartzell.com)  \n1.  \n2.  \n3.  \nHARTZELL GAS FIRED DOOR HEATER  \nSERIES 79  \nMODELS DH22 & DH24  \nDESCRIPTION  \nThe Hartzell Gas-Fired Door Heater is designed to instantly direct a high velocity of heated air towards a large door opening, when the door is opened in cold weather. It utilizes a ring type burner operating on  \nnatural gas. The propeller is a special Hartzell Ductaxial, one piece, solid aluminum casting, direct connected to an industrial duty, totally enclosed motor.  \nThe direct fired burner was designed and is manufactured by Hartzell, based on many years of experience in the direct fired gas make up air and crop dryer markets.  \nProducts of combustion, which are discharged directly into the main airstream, consist of carbon dioxide and water vapor. At maximum rated heat output the concentration of C02 is approximately 2000 PPM (parts per million) compared with a maximum allowable* of 5000 PPM.  \nAlthough the water vapor of combustion is added, relative humidity is actually reduced, owing to the heat that is added to the air. At maximum rated heat output, and assuming 60° F. saturated entering air, the discharge air is less than 5% RH.  \nMOUNTING POSITIONS  \n(A)  \n(B)  \nBurner: The standard unit may be installed at any angle between horizontal and vertical down airflow. The control cabinet is on the left-hand side, when facing the airstream. The back panel of the cabinet must lie in a vertical plane; i.e., the burner house cannot be rotated, thus rolling the cabinet toward the top or bottom of the burner house.  \nPlumbing: The gas piping elbows up and into the burner house on the bottom centerline. During installation, by loosening the union just outside the heater, the piping train may be rotated to any desired direction, assuring gas valves are properly oriented. (See CAUTION in Section 7.)  \nINSTALLATION (MECHANICAL)  \nOne, 24” Door Heater will handle up to approximately a 12 ' x 16 ' door opening. Larger opening require two or more heaters. See sizing chart on page 3.  \nCAUTION: No door heater can substitute for a Tempered Intake Air Unit. If in-plant negative pressure exists because of exhaust ventilation, a makeup air unit must be provided before a door heater can be expected to function properly. See your local Hartzell representative.  \nYour door heater should be aimed at a spot on the floor about four or five feet inside, and midway across, the door. At the inlet end there should be no obstructions to the airflow closer than 20 \" -24 \" . At the outlet end, of course, there should be nothing obstructing the airstream. Around the sides of the heater there should be no combustible material closer than three feet. Always make sure you leave access room for maintenance.  \n1-800-336-3267  [www.hartzell.com](www.hartzell.com)  [info@ha","cbCaiaAku6TxBC5N","https://ap.wps.com/l/cbCaiaAku6TxBC5N","pdf",1173811,"English","# Installation & Maintenance Manual\n## Gas Fired Door Heater Series 79 (Models DH22 & DH24)\n## Description and Operating Overview\n## Mounting Positions\n## Installation (Mechanical)\n## Gas Pressure Regulator\n## Suggestions for Regulator Venting","[{\"question\":\"What is the purpose of the Hartzell Gas-Fired Door Heater in cold weather?\",\"answer\":\"It directs a high velocity of heated air toward a large door opening when the door is opened in cold weather.\"},{\"question\":\"What mounting and cabinet orientation rules apply to the burner and control cabinet?\",\"answer\":\"The standard unit can be installed at any angle between horizontal and vertical down airflow; when facing the airstream, the control cabinet is on the left and the back panel must remain in a vertical plane (the cabinet cannot be rotated by rolling it toward the top or bottom of the burner house).\"},{\"question\":\"Why can’t a door heater replace a tempered intake air unit?\",\"answer\":\"No door heater can substitute for a Tempered Intake Air Unit; if in-plant negative pressure exists due to exhaust ventilation, a makeup air unit must be provided so the door heater can function properly.\"}]","HARTZELL Gas Fired Door Heater - Series 79 - Installation & Maintenance Manual | PDF",1790391789,25]