Daikin ERGA04DAV3A Installer's Reference Manual

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Daikin ERGA04DAV3A Installer's Reference Manual Manual pdf 34 page image

7 InstallationInstaller reference guide34ERGA04~08DAV3(A) + EHVH/X04+08S18+23DADaikin Altherma – Low temperature split4P495248-1 – 2017.12NOTICEDo NOT tilt the unit forwards:0° 1° 1°7.5 Connecting the refrigerant piping7.5.1 About connecting the refrigerant pipingBefore connecting the refrigerant pipingMake sure the outdoor and indoor unit are mounted.Typical workflowConnecting the refrigerant piping involves:▪ Connecting the refrigerant piping to the outdoor unit▪ Connecting the refrigerant piping to the indoor unit▪ Insulating the refrigerant piping▪ Keeping in mind the guidelines for:▪ Pipe bending▪ Flaring pipe ends▪ Brazing▪ Using the stop valves7.5.2 Precautions when connecting therefrigerant pipingINFORMATIONAlso read the precautions and requirements in thefollowing chapters:▪ General safety precautions▪ PreparationDANGER: RISK OF BURNINGCAUTION▪ Do NOT use mineral oil on flared part.▪ Do NOT reuse piping from previous installations.▪ NEVER install a drier to this R32 unit to guarantee itslifetime. The drying material may dissolve and damagethe system.NOTICETake the following precautions on refrigerant piping intoaccount:▪ Avoid anything but the designated refrigerant to getmixed into the refrigerant cycle (e.g. air).▪ Only use R32 when adding refrigerant.▪ Only use installation tools (e.g. manifold gauge set) thatare exclusively used for R32 installations to withstandthe pressure and to prevent foreign materials (e.g.mineral oils and moisture) from mixing into the system.▪ Install the piping so that the flare is NOT subjected tomechanical stress.▪ Protect the piping as described in the following table toprevent dirt, liquid or dust from entering the piping.▪ Use caution when passing copper tubes through walls(see figure below).Unit Installation period Protection methodOutdoor unit >1 month Pinch the pipe<1 month Pinch or tape the pipeIndoor unit Regardless of theperiodINFORMATIONDo NOT open the refrigerant stop valve before checkingthe refrigerant piping. When you need to charge additionalrefrigerant it is recommended to open the refrigerant stopvalve after charging.7.5.3 Guidelines when connecting therefrigerant pipingTake the following guidelines into account when connecting pipes:▪ Coat the flare inner surface with ether oil or ester oil whenconnecting a flare nut. Tighten 3 or 4 turns by hand, beforetightening firmly.▪ ALWAYS use 2 wrenches together when loosening a flare nut.▪ ALWAYS use a spanner and torque wrench together to tighten theflare nut when connecting the piping. This to prevent nut crackingand leaks.a bcda Torque wrenchb Spannerc Piping uniond Flare nutFinal English - Tanslations in progress