Daikin FXUA50AVEB Installer And User Manual

Also see for FXUA100AVEB: Installation and operation manual

17 | Piping installationInstaller and user reference guide61FXUA50~100AVEBVRV system air conditioner4P673843-1 – 2022.01Outer diameter (Ø) Temper grade Thickness (t)(a)6.4 mm (1/4") Annealed (O) ≥0.8 mmtØ9.5 mm (3/8")12.7 mm (1/2")15.9 mm (5/8")(a) Depending on the applicable legislation and the maximum working pressure of the unit(see "PS High" on the unit name plate), larger piping thickness might be required.17.1.2 Refrigerant piping insulation▪ Use polyethylene foam as insulation material:- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and0.045 kcal/mh°C)- with a heat resistance of at least 120°C▪ Insulation thicknessPipe outer diameter (Øp) Insulation inner diameter(Øi)Insulation thickness (t)6.4 mm (1/4") 8~10 mm ≥10 mm9.5 mm (3/8") 12~15 mm ≥13 mm12.7 mm (1/2") 14~16 mm ≥13 mm15.9 mm (5/8”) 17~20 mm ≥13 mmØiØitØpØpIf the temperature is higher than 30°C and the humidity is higher than RH 80%, thethickness of the insulation materials should be at least 20 mm to preventcondensation on the surface of the insulation.17.2 Connecting the refrigerant piping17.2.1 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 valves