Daikin FXUA50AVEB Installer And User Manual

Also see for FXUA100AVEB: Installation and operation manual

17 | Piping installationInstaller and user reference guide60FXUA50~100AVEBVRV system air conditioner4P673843-1 – 2022.0117 Piping installationIn this chapter17.1 Preparing refrigerant piping ................................................................................................................................................... 6017.1.1 Refrigerant piping requirements ........................................................................................................................... 6017.1.2 Refrigerant piping insulation.................................................................................................................................. 6117.2 Connecting the refrigerant piping.......................................................................................................................................... 6117.2.1 About connecting the refrigerant piping............................................................................................................... 6117.2.2 Precautions when connecting the refrigerant piping............................................................................................ 6217.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 6217.2.4 Pipe bending guidelines ......................................................................................................................................... 6317.2.5 To flare the pipe end.............................................................................................................................................. 6317.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 6417.1 Preparing refrigerant piping17.1.1 Refrigerant piping requirementsINFORMATIONAlso read the precautions and requirements in the "2 General safetyprecautions" [45].CAUTIONPiping MUST be installed according to instructions given in "17 Pipinginstallation" [4 60]. Only mechanical joints (e.g. braze+flare connections) that arecompliant with the latest version of ISO14903 can be used.NOTICEThe piping and other pressure-containing parts shall be suitable for refrigerant. Usephosphoric acid deoxidised seamless copper for refrigerant.▪ Foreign materials inside pipes (including oils for fabrication) must be≤30 mg/10 m.Refrigerant piping diameterFor piping connections of the indoor unit, use the following piping diameters:Class Pipe outer diameter (mm)Liquid pipe Gas pipe50+71 Ø6.4 Ø12.7100 Ø9.5 Ø15.9Refrigerant piping material▪ Piping material: Phosphoric acid deoxidised seamless copper.▪ Flare connections: Only use annealed material.▪ Piping temper grade and thickness: