Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin FXKQ20AMVEB User Reference Manual

17 Piping installation

In this chapter

17.1 Preparing refrigerant piping

17.1.1 Refrigerant piping requirements

Refrigerant piping diameter
Refrigerant piping material
FXKQ-A
VRV system air conditioner
4P747548-1 - 2023.11
17.1 Preparing refrigerant piping ...................................................................................................................................................
17.1.1 Refrigerant piping requirements ...........................................................................................................................
17.1.2 Refrigerant piping insulation .................................................................................................................................
17.2 Connecting the refrigerant piping..........................................................................................................................................
17.2.1 About connecting the refrigerant piping...............................................................................................................
17.2.2 Precautions when connecting the refrigerant piping ...........................................................................................
17.2.3 Guidelines when connecting the refrigerant piping .............................................................................................
17.2.4 Pipe bending guidelines .........................................................................................................................................
17.2.5 To flare the pipe end..............................................................................................................................................
17.2.6 To connect the refrigerant piping to the indoor unit............................................................................................
CAUTION
Piping MUST be installed according to instructions given in
installation" [ 4
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 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.
For piping connections of the indoor unit use the following piping diameters:
Class
20~50
63
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
53]. Only mechanical joints (e.g. braze+flare connections) that are
6].
Pipe outer diameter (mm)
Liquid piping
Ø6.4 mm
Ø9.5 mm
17 Piping installation
|
"17 Piping
"2 General safety
Gas piping
Ø12.7 mm
Ø15.9 mm
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