Daikin RXF60B2V1B Installer's Reference Manual

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Daikin RXF60B2V1B Installer's Reference Manual Manual pdf 13 page image

6 InstallationInstaller reference guide13RXF50+60B2_RXF71A2_RXP50~71L2_(A)RXM42~71N2_RXJ50N2_RXA42+50B2R32 split series4P513661-6B – 2018.051 Prepare 2 cables as indicated in the following illustration (fieldsupply).2 Place the 2 cables over the outdoor unit.3 Insert a rubber sheet between the cables and the outdoor unitto prevent the cables from scratching the paint (field supply).4 Attach the ends of the cables and tighten them.6.4 Connecting the refrigerant piping6.4.1 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 indoor unit▪ Connecting the refrigerant piping to the outdoor unit▪ Insulating the refrigerant piping▪ Keeping in mind the guidelines for:▪ Pipe bending▪ Flaring pipe ends▪ Using the stop valves6.4.2 Precautions when connecting therefrigerant pipingINFORMATIONAlso read the precautions and requirements in thefollowing chapters:▪ General safety precautions▪ PreparationDANGER: RISK OF BURNINGCAUTION▪ Use the flare nut fixed to the unit.▪ To prevent gas leakage, apply refrigeration oil only tothe inside of the flare. Use refrigeration oil for R32.▪ Do NOT reuse joints.CAUTION▪ 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.WARNINGConnect the refrigerant piping securely before running thecompressor. If the refrigerant piping is NOT connected andthe stop valve is open when the compressor is run, air willbe sucked in. This will cause abnormal pressure in therefrigeration cycle, which may result in equipment damageand even injury.6.4.3 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.