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
58
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
17.2.2
17.2.3
17.2.4
Pipe bending guidelines .........................................................................................................................................
17.2.5
To flare the pipe end..............................................................................................................................................
17.2.6
CAUTION
Piping MUST be installed according to instructions given in
4
installation" [
compliant with the latest version of ISO14903 can be used.
CAUTION
▪
When mechanical connectors are re-used indoors, renew the sealing parts.
▪
When flared joints are re-used indoors, re-make the flared part.
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
20~32
40~63
▪
Piping material: phosphoric acid deoxidised seamless copper
▪
Flare connections: Only use annealed material.
▪
Piping temper grade and thickness:
58]. Only mechanical joints (e.g. braze+flare connections) that are
6].
Pipe outer diameter (mm)
Liquid piping
Ø6.4 mm
Ø6.4 mm
58
58
59
59
59
60
61
61
61
62
"17 Piping
"2 General safety
Gas piping
Ø9.5 mm
Ø12.7 mm
FXKA-A
VRV system air conditioner
4P747548-2 - 2023.11