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17
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Piping installation
17 Piping installation
In this chapter
17.1 Preparing refrigerant piping
17.1.1 Refrigerant piping requirements
Refrigerant piping diameter
Refrigerant piping material
Installer and user reference guide
60
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
4
installation" [
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
32
50+63
100
▪
Piping material: phosphoric acid deoxidised seamless copper
▪
Flare connections: Only use annealed material.
▪
Piping temper grade and thickness:
60]. Only mechanical joints (e.g. braze+flare connections) that are
7].
Pipe outer diameter (mm)
Liquid pipe
Ø6.4
Ø6.4
Ø9.5
60
60
61
61
61
62
63
63
63
64
"17 Piping
"2 General safety
Gas pipe
Ø9.5
Ø12.7
Ø15.9
FXHA-A
VRV system air conditioner
4P673749-1A - 2022.11
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