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Provides guidance for competent installers and qualified Gas Safe engineers, including responsibilities of the user, annual maintenance, and periodic checks such as the inlet water filter. Includes attention on safe air quality around the appliance, venting and corrosion risks from chemicals. Lists structured sections for operation, temperature controls, diagnostics, flue and condensate requirements, commissioning, wiring, and warranty information.",{"@graph":69,"@context":122},[70,84,105],{"@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":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/reu-km2035ffud-e-infinity-k20i-installation-and-user-manual/662359/",{"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/reu-km2035ffud-e-infinity-k20i-installation-and-user-manual/662359.png","ImageObject",300,407,{"name":92,"@type":93},"awa","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Who is allowed to install and work on the Rinnai Infinity water heater?","Question",{"text":112,"@type":113},"Installation and all work on the appliance must be carried out by competent persons, specifically a qualified gas engineer. The installer must hold an up-to-date Gas Safe Registered Gas Installer identification card.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What responsibilities does the user have after installation?",{"text":117,"@type":113},"The user must follow all warnings in the book, only reference the user section, and must not perform procedures listed in the installer section. The unit should be checked and maintained annually by a gas engineer, and the inlet water filter should be periodically checked.",{"name":119,"@type":110,"acceptedAnswer":120},"Why does the manual warn about air around the water heater and corrosive chemicals?",{"text":121,"@type":113},"Air surrounding the water heater, venting, and vent termination(s) is used for combustion and must be free of compounds that cause corrosion. This includes corrosive chemicals found in aerosol sprays, detergents, bleaches, cleaning solvents, oil-based paints/varnishes, and refrigerants.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},662359,1793213089,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},3985747858093,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","| Installation and User\u003Cbr>Manual\u003Cbr>|  |\n| --- | --- |\n| REU-KM2035FFUD-E Infinity K20i REU-KM3237FFUD-E Infinity K32i REU-KM3237WD-E Infinity K32e\u003Cbr>REU-KM3237FFUDHD-E Infinity HDC 1500i\u003Cbr>REU-KM3237WDHD-E\u003Cbr>Infinity HDC 1500e | REU-KM2035FFUDHD-E Infinity HDC1000i REU-KM2635FFUD-E Infinity K26i REU-KM2635WD-E Infinity K26e\u003Cbr>REU-KM2635FFUDHD-E Infinity HDC 1200i\u003Cbr>REU-KM2635WDHD-E\u003Cbr>Infinity HDC 1200e |\n| Continuous Flow Water Heater\u003Cbr>Important.\u003Cbr>Read these instructions carefully before attempting installation or use of this appliance. All work must be carried out by competent persons. |  |\n\n| The Rinnai Infinity range of water heaters, when correctly installed, comply with the requirements of the United Kingdom Water Regulations / Byelaws (Scotland) . These Products can be found listed in the Water Fittings and Materials Directory. | |\n| --- | --- |\n| The Rinnai Infinity condensing water heaters are CE Marked as allowed by Technigas.\u003Cbr>Infinity K32 & HDC1500\u003Cbr>Infinity K26 & HDC1200\u003Cbr>Infinity K20 & HDC1000\u003Cbr>Certificate numbers: E1188/5560-Rev.3\u003Cbr>ID number: 0461BU0950\u003Cbr>Date of Issue: 01/09/2009\u003Cbr>Last revision: 28/05/2015\u003Cbr>Certificate numbers: E1189/5560-Rev.1\u003Cbr>ID number: 0461BU0950\u003Cbr>Date of Issue: 01/09/2009\u003Cbr>Last revision: 02/02/2010\u003Cbr>|  |\n| Quality System Standard | |\n| ISO 9001-2008\u003Cbr>The Design, Development, and Manufacture of Gas Water Heating Appliances done under Rinnai’s Quality Management System is certified under the Quality Management System Standard ISO 9001.\u003Cbr>Registration Number JQ0003D Registered since: February 1994 Certified by JIA—QA Centre. |  |\n\nCONTENTS  \nCONTENTS  3  \nUSER INSTRUCTIONS 4  \nFEATURES AND BENEFITS 5  \nIMPORTANT INFORMATION  6  \nOPERATION WITHOUT REMOTES  8  \nSTATUS MONITOR 8  \nTEMPERATURE CONTROLS 9  \nERROR MESSAGES 14  \nRESTARTING THE RINNAI WATER HEATER 16  \nCARING FOR THE INFINITY  16  \nINSTALLATION INSTRUCTIONS  17  \nUK INSTALLATION INSTRUCTIONS 18  \nUNPACKING RINNAI WATER HEATER 19  \nOPERATION  20  \nMAIN COMPONENTS 23  \nINSTALLATION INSTRUCTIONS 24  \nFLUE REQUIREMENTS  28  \nCONDENSATE DISPOSAL  32  \nTEMPERATURE CONTROLS 34  \nEZ CONNECT  36  \nTESTING 37  \nGAS PRESSURE SETTING  38  \nDIP SWITCH SETTING 40  \nDIMENSIONS 42  \nTECHNICAL DETAILS  44  \nPRODUCT FICHE 46  \nFLOW CHART 49  \nWIRING DIAGRAM 50  \nDIAGNOSTIC POINTS 52  \nWATER FLOW CHARACTERISTICS 53  \nLETTER OF COMPLIANCE 54  \nCE CERTIFICATE 55  \nCOMMISSIONING CHECKLIST 57  \nCOMMISSIONING SHEET  58  \nSERVICE RECORD 59  \nMAINTENANCE  60  \nUK WARRANTY 61  \nSPECIFICATION 63  \nCONTACT 64  \nHEATER DETAILS 64  \nUSERS INSTRUCTIONS  \nThe following instructions are designed for the user of the water heater. The user may not install or adjust the appliance in any way that requires the removal of the front cover of the unit. To remove the front cover of the unit you must be certified competent to do so. Information for the Installer is given from page 17.  \nAll work done on this appliance must be done by a qualified gas engineer. A qualified gas engineer must carry an up to date Gas Safe Registered Gas Installer photo identification card while working on gas appliances. If you are unsure do not be afraid to ask the engineer to show you the card. If you are still not satisfied call Gas Safe on 0800 408 5500 and verify the engineer’s name with their database. This is foryour own safety.  \nResponsibilities of the USER  \nThe user must abide by all warnings given in this book. The user must only reference the user section of the book, and may not carry out any procedure listed in the installer section. This installation manual should be kept with the appliance for maintenance and user information.  \nThe user must have the unit checked and maintained annually by a gas engineer.  \nThe user must periodically check the water filter on the inlet to the appliance.  \nThe user must not use the appliance in any way that it was not meant to be used. The user may only use the heater as detailed in the User portion of this manu","cbCaivYvSGs5K1Rw","https://ap.wps.com/l/cbCaivYvSGs5K1Rw","pdf",11821813,64,"English","# Contents\n## User Instructions\n## Responsibilities of the USER\n## Important Information\n## Operation Without Remotes\n## Status Monitor\n## Temperature Controls\n## Error Messages\n## Restarting the Rinnai Water Heater\n## Caring for the Infinity\n## Installation Instructions\n## UK Installation Instructions\n## Unpacking Rinnai Water Heater\n## Operation\n## Main Components\n## Flue Requirements\n## Condensate Disposal\n## EZ Connect\n## Testing\n## Gas Pressure Setting\n## DIP Switch Setting\n## Dimensions\n## Technical Details\n## Product Fiche\n## Flow Chart\n## Wiring Diagram\n## Diagnostic Points\n## Water Flow Characteristics\n## Letter of Compliance\n## CE Certificate\n## Commissioning Checklist\n## Commissioning Sheet\n## Service Record\n## Maintenance\n## UK Warranty\n## Specification\n## Contact\n## Heater Details","[{\"question\":\"Who is allowed to install and work on the Rinnai Infinity water heater?\",\"answer\":\"Installation and all work on the appliance must be carried out by competent persons, specifically a qualified gas engineer. The installer must hold an up-to-date Gas Safe Registered Gas Installer identification card.\"},{\"question\":\"What responsibilities does the user have after installation?\",\"answer\":\"The user must follow all warnings in the book, only reference the user section, and must not perform procedures listed in the installer section. The unit should be checked and maintained annually by a gas engineer, and the inlet water filter should be periodically checked.\"},{\"question\":\"Why does the manual warn about air around the water heater and corrosive chemicals?\",\"answer\":\"Air surrounding the water heater, venting, and vent termination(s) is used for combustion and must be free of compounds that cause corrosion. This includes corrosive chemicals found in aerosol sprays, detergents, bleaches, cleaning solvents, oil-based paints/varnishes, and refrigerants.\"}]","REU-KM2035FFUD-E Infinity K20i - Installation and User Manual | PDF",161]