Daikin 3MXM40N2V1B9, Руководство по установке для специалистов, Страница: 32 / 84

7 | Piping installation
Installer reference guide
32
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1D – 2021.03
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping ................................................................................................................................................... 32
7.1.1 Refrigerant piping requirements ........................................................................................................................... 32
7.1.2 Refrigerant piping insulation.................................................................................................................................. 33
7.1.3 Refrigerant piping length and height difference ................................................................................................... 34
7.2 Connecting the refrigerant piping.......................................................................................................................................... 35
7.2.1 About connecting the refrigerant piping............................................................................................................... 35
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 35
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 36
7.2.4 Pipe bending guidelines ......................................................................................................................................... 37
7.2.5 To flare the pipe end.............................................................................................................................................. 37
7.2.6 Connections between outdoor and indoor unit using reducers........................................................................... 38
7.2.7 Using the stop valve and service port.................................................................................................................... 40
7.2.8 To connect the refrigerant piping to the outdoor unit ......................................................................................... 42
7.3 Checking the refrigerant piping.............................................................................................................................................. 42
7.3.1 About checking the refrigerant piping................................................................................................................... 42
7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 43
7.3.3 To check for leaks................................................................................................................................................... 43
7.3.4 To perform vacuum drying .................................................................................................................................... 44
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "2 General safety
precautions" [
4
5].
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping diameter:
2MXM68
Liquid piping 2× Ø6.4 mm (1/4")
Gas piping 1× Ø9.5 mm (3/8")
1× Ø12.7 mm (1/2")
3MXM40, 3MXM52, 3MXM68, 3AMXM52, 3MXF52, 3AMXF52, 3MXF68
Liquid piping 3× Ø6.4 mm (1/4")
Gas piping 1× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")
4MXM68
Liquid piping 4× Ø6.4 mm (1/4")
Gas piping 2× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")