Daikin FXHA32AVEB, Инструкция по установке и эксплуатации, Страница: 58 / 88

17 | Piping installation
Installer and user reference guide
58
FXHA32~100AVEB
VRV system air conditioner
4P673749-1 – 2022.01
17 Piping installation
In this chapter
17.1 Preparing refrigerant piping ................................................................................................................................................... 58
17.1.1 Refrigerant piping requirements ........................................................................................................................... 58
17.1.2 Refrigerant piping insulation.................................................................................................................................. 59
17.2 Connecting the refrigerant piping.......................................................................................................................................... 59
17.2.1 About connecting the refrigerant piping............................................................................................................... 59
17.2.2 Precautions when connecting the refrigerant piping............................................................................................ 60
17.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 60
17.2.4 Pipe bending guidelines ......................................................................................................................................... 61
17.2.5 To flare the pipe end.............................................................................................................................................. 61
17.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 62
17.1 Preparing refrigerant piping
17.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "2 General safety
precautions" [
4
5].
CAUTION
Piping MUST be installed according to instructions given in "17 Piping
installation" [
4
58]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Refrigerant piping diameter
For piping connections of the indoor unit, use the following piping diameters:
Class Pipe outer diameter (mm)
Liquid pipe Gas pipe
32 Ø6.4 Ø9.5
50+63 Ø6.4 Ø12.7
100 Ø9.5 Ø15.9
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness: