Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin FTXP71N2V1B Installer's Reference Manual

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

Refrigerant piping diameter
Refrigerant piping material
FTXP-N
Daikin room air conditioner
4P518023-14L - 2022.06
7.1 Preparing refrigerant piping ...................................................................................................................................................
7.1.1 Refrigerant piping requirements ...........................................................................................................................
7.1.2 Refrigerant piping insulation..................................................................................................................................
7.2 Connecting the refrigerant piping..........................................................................................................................................
7.2.1 About connecting the refrigerant piping...............................................................................................................
7.2.2 Precautions when connecting the refrigerant piping............................................................................................
7.2.3 Guidelines when connecting the refrigerant piping..............................................................................................
7.2.4 Pipe bending guidelines .........................................................................................................................................
7.2.5 To flare the pipe end..............................................................................................................................................
7.2.6 To connect the refrigerant piping to the indoor unit............................................................................................
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
4
precautions" [
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Use the same diameters as the connections on the outdoor units:
Liquid piping
Ø6.4
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter (Ø)
6.4 mm (1/4")
12.7 mm (1/2")
(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.
7].
Pipe outer diameter (mm)
Temper grade
Annealed (O)
7 Piping installation
|
"2 General safety
Gas piping
Ø12.7
(a)
Thickness (t)
≥0.8 mm
Installer reference guide
29
29
30
30
30
30
31
32
32
33
Ø
t
29