Daikin FTXF60D2V1B - 7 Piping Installation; Default Chapter; Preparing Refrigerant Piping; Refrigerant Piping Requirements

7 | Piping installation
Installer reference guide
29
FTXP-M + FTXF-D + FTXF-A + ATXF-A
Daikin room air conditioner
4P513661-12L – 2021.07
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping................................................................................................................................................... 29
7.1.1 Refrigerant piping requirements ........................................................................................................................... 29
7.1.2 Refrigerant piping insulation.................................................................................................................................. 30
7.2 Connecting the refrigerant piping.......................................................................................................................................... 30
7.2.1 About connecting the refrigerant piping............................................................................................................... 30
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 30
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 31
7.2.4 Pipe bending guidelines ......................................................................................................................................... 32
7.2.5 To flare the pipe end.............................................................................................................................................. 32
7.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 33
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7].
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.
▪ 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:
Outer diameter (Ø) Temper grade Thickness (t)
(a)
6.4mm (1/4") Annealed (O) ≥0.8mm
t
Ø
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.