Daikin RXP50N5V1B, Руководство по установке для специалистов

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7 | Piping installation
Installer reference guide
33
RXF50~71D5V1B
R32 split series
4P519439-18T – 2022.06
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping ................................................................................................................................................... 33
7.1.1 Refrigerant piping requirements ........................................................................................................................... 33
7.1.2 Refrigerant piping insulation.................................................................................................................................. 34
7.1.3 Refrigerant piping length and height difference ................................................................................................... 34
7.2 Connecting the refrigerant piping.......................................................................................................................................... 34
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 Using the stop valve and service port.................................................................................................................... 38
7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 39
7.3 Checking the refrigerant piping.............................................................................................................................................. 40
7.3.1 About checking the refrigerant piping................................................................................................................... 40
7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 40
7.3.3 To check for leaks................................................................................................................................................... 41
7.3.4 To perform vacuum drying .................................................................................................................................... 41
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
CAUTION
Piping and joints of a split system shall be made with permanent joints when inside
an occupied space except joints directly connecting the piping to the indoor units.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant piping.
INFORMATION
Also read the precautions and requirements in the "2 General safety
precautions" [
4
7].
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Pipe outer diameter (mm)
Liquid piping Gas piping
Ø6.4 Ø12.7
Refrigerant piping material
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness: