3 User safety instructionsInstallation and operation manual6RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1D – 2020.10WARNINGAny gas or oil remaining inside the stop valve may blow offthe spun piping.If these instructions are NOT followed correctly it mayresult in property damage or personal injury, which may beserious depending on the circumstances.WARNINGNEVER remove the spun piping by brazing.Any gas or oil remaining inside the stop valve may blow offthe spun piping.WARNING▪ ONLY use R410A as refrigerant. Other substancesmay cause explosions and accidents.▪ R410A contains fluorinated greenhouse gases. Itsglobal warming potential (GWP) value is 2087.5. DoNOT vent these gases into the atmosphere.▪ When charging refrigerant, ALWAYS use protectivegloves and safety glasses.WARNINGALWAYS use multicore cable for power supply cables.CAUTION▪ When connecting the power supply: connect the earthcable first, before making the current-carryingconnections.▪ When disconnecting the power supply: disconnect thecurrent-carrying cables first, before separating the earthconnection.▪ The length of the conductors between the power supplystress relief and the terminal block itself must be assuch that the current-carrying wires are tautened beforethe earth wire is in case the power supply is pulledloose from the stress relief.CAUTIONDo NOT perform the test operation while working onthe indoor units.When performing the test operation, NOT only the outdoorunit, but the connected indoor unit will operate as well.Working on an indoor unit while performing a test operationis dangerous.CAUTIONDo NOT insert fingers, rods or other objects into the airinlet or outlet. Do NOT remove the fan guard. When thefan is rotating at high speed, it will cause injury.For the user3 User safety instructionsAlways observe the following safety instructions and regulations.3.1 GeneralWARNINGIf you are NOT sure how to operate theunit, contact your installer.WARNINGChildren aged from 8 years and aboveand persons with reduced physical,sensory or mental capabilities or lackof experience and knowledge can onlyuse this appliance if they have beengiven supervision or instructionconcerning the use of the appliance bya person responsible for their safety.Children MUST NOT play with theappliance.Cleaning and user maintenance MUSTNOT be carried out by children withoutsupervision.WARNINGTo prevent electrical shocks or fire:▪ Do NOT rinse the unit.▪ Do NOT operate the unit with wethands.▪ Do NOT place any objects containingwater on the unit.CAUTION▪ Do NOT place any objects orequipment on top of the unit.▪ Do NOT sit, climb or stand on theunit.