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Covers safety warning symbols, outdoor-only installation constraints, clearances from openings, ventilation provisions for enclosed structures, and rules for discharge of pressure-relief devices and fusible plugs. Provides guidance for A2L partial units and refrigerant piping, including valve positioning, restrictions on solenoid valve liquid blocking, and requirements for system compatibility, plus operational start-up and maintenance topics.",{"@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/air-cooled-condenser-installation-and-operation-guide-march-2025/652743/",{"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/air-cooled-condenser-installation-and-operation-guide-march-2025/652743.png","ImageObject",300,407,{"name":92,"@type":93},"Mary Man","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the key installation safety constraints for A2L condensing units?","Question",{"text":112,"@type":113},"The manual states the appliance shall only be installed outdoors and warns against using non-recommended means to accelerate defrosting or cleaning. It also restricts placement within specified distances of building openings and prohibits piercing or burning.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What ventilation is required when an A2L unit is enclosed in structures like a penthouse or lean-to?",{"text":117,"@type":113},"When enclosed within a penthouse, lean-to, or other open structure, the manual requires natural or mechanical ventilation to be provided.",{"name":119,"@type":110,"acceptedAnswer":120},"How should solenoid valves be handled for partial units with A2L refrigerant?",{"text":121,"@type":113},"The manual requires solenoid valves to be correctly positioned to avoid hydraulic shock and specifies they shall not block in liquid refrigerant unless adequate relief is provided to the low-pressure side of the refrigerant system.","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},652743,1793007065,{"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":34,"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":144,"read_time":145},7421720224475,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Air-Cooled Condenser Installation & Operation  \nBulletin No. H-IM-90 March 2025 Part Number 25007301  \nReplaces H-IM-90, February 2017  \nAir-Cooled Condensers  \nInstallation and Operation Guide  \nApplicable for Bohn, Larkin, Climate Control, and Chandler brands  \nTable of Contents  \nA2L Condensing Units...................................2  \nGeneral Information ..................................2-3  \nGeneral Information for Service Personnel .............3-5  \nCorrect Working Procedures .............................5  \nInspection ..............................................6  \nSystem Warranty ........................................6  \nInstallation .............................................6  \nUnit Location ...........................................6  \nSound Vibration.........................................6  \nRigging Instructions.....................................7  \nSpace and Location Requirements .......................8  \nWalls or Obstructions ...................................8  \nTypical Arrangements ...................................9  \nInstallation, Refrigerant Piping...........................9  \nDischarge Lines ....................................... 10  \nElectrical Wiring....................................... 11  \nTypical Wiring Diagram................................ 12  \nStart-Up .............................................. 13  \nDischarge Gas Pulsation............................... 13  \nWinter Operation Head Pressure Control............... 13  \nFan Cycling ........................................... 13  \nFan Cycling Head Pressure Controls.................... 14  \nVariable Speed ....................................... 14  \nSplitting Controls ..................................... 14  \nFlooding Head Pressure Controls ...................... 14  \nRefrigerant Charge .................................... 14  \nMinimum Ambient for Fan Cycling..................... 15  \nMechanical Fan Cycling Thermostat Settings........... 15  \nElectronic Fan Cycling Thermostat Settings ............ 16  \nPressure Chart ..................................... 16-17  \nRefrigerant Charge Tables .......................... 18-27  \nFlooded Charge Temperature Difference Factor ........ 28  \nModel Cross Reference ................................ 28  \nMaintenance.......................................... 28  \nCleaning Instructions ................................. 28  \nIn-Warranty Return Material Procedure ................ 29  \nInterLink Parts List .................................... 29  \nE&G Motors with Integrated Variable Speed............ 30  \nSpeed Adjustment Characteristics ..................... 30  \nExternal Control Signal ................................ 30  \nProportional Pressure Control ......................... 30  \nHead Pressure Setpoint ................................31  \nMinimum Output ......................................31  \nThrottling Range .......................................31  \nIntegration Constant ...................................31  \nReverse Acting or Direct Acting Mode ..................31  \nStandard Wiring Configuration ........................ 32  \nProtective Features.................................... 32  \nLocked-Rotor and Under Voltage Protection ........... 32  \nPhase Failure.......................................... 32  \nEC Motor Wiring ...................................... 32  \nTypical Condenser Wirings ......................... 33-34  \nInstallation Check List ................................. 35  \nA2L Condensing Units  \nA2L condensing units function in much the same way as standard A1 condensing units with some exceptions. This manual describes recommendations and requirements unique to A2L condensing units.  \nSymbols  \nListed below are the warning symbols and their meanings used on the A2L condensing units.  \nWARNING: Risk of fire/flammable materials  \nWARNING  \nDo not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.  \nThe appliance shall o","cbCaiq4ylPj81GuI","https://ap.wps.com/l/cbCaiq4ylPj81GuI","pdf",1123461,36,"English","# A2L Condensing Units\n## Symbols\n## Installation Instructions\n## Instructions for partial units with A2L Refrigerant\n# General Information\n## Information for spaces where refrigerant pipes are allowed","[{\"question\":\"What are the key installation safety constraints for A2L condensing units?\",\"answer\":\"The manual states the appliance shall only be installed outdoors and warns against using non-recommended means to accelerate defrosting or cleaning. It also restricts placement within specified distances of building openings and prohibits piercing or burning.\"},{\"question\":\"What ventilation is required when an A2L unit is enclosed in structures like a penthouse or lean-to?\",\"answer\":\"When enclosed within a penthouse, lean-to, or other open structure, the manual requires natural or mechanical ventilation to be provided.\"},{\"question\":\"How should solenoid valves be handled for partial units with A2L refrigerant?\",\"answer\":\"The manual requires solenoid valves to be correctly positioned to avoid hydraulic shock and specifies they shall not block in liquid refrigerant unless adequate relief is provided to the low-pressure side of the refrigerant system.\"}]","Air-Cooled Condenser Installation and Operation Guide - March 2025 | PDF",1792882324,91]