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18 Piping installation
In this chapter
18.1 Preparing refrigerant piping
18.1.1 Refrigerant piping requirements
18.1.2 Refrigerant piping material
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D - 2023.02
18.1
Preparing refrigerant piping ...................................................................................................................................................
18.1.1
Refrigerant piping requirements ...........................................................................................................................
18.1.2
Refrigerant piping material ....................................................................................................................................
18.1.3
To select the piping size .........................................................................................................................................
18.1.4
To select refrigerant branch kits............................................................................................................................
18.1.5
Refrigerant piping length and height difference ...................................................................................................
18.2
Connecting the refrigerant piping..........................................................................................................................................
18.2.1
About connecting the refrigerant piping...............................................................................................................
18.2.2
Precautions when connecting the refrigerant piping............................................................................................
18.2.3
Pipe bending guidelines .........................................................................................................................................
18.2.4
To remove the spun pipes .....................................................................................................................................
18.2.5
To braze the pipe end ............................................................................................................................................
18.2.6
Using the stop valve and service port....................................................................................................................
18.2.7
To connect the refrigerant piping to the outdoor unit .........................................................................................
18.2.8
To connect the refrigerant branching kit ..............................................................................................................
18.3
Checking the refrigerant piping..............................................................................................................................................
18.3.1
About checking the refrigerant piping...................................................................................................................
18.3.2
Checking refrigerant piping: General guidelines ...................................................................................................
18.3.3
Checking refrigerant piping: Setup ........................................................................................................................
18.3.4
To perform a leak test............................................................................................................................................
18.3.5
To perform vacuum drying ....................................................................................................................................
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.
▪
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")
9.5 mm (3/8")
12.7 mm (1/2")
15.9 mm (5/8")
19.1 mm (3/4")
8].
Temper grade
Annealed (O)
Annealed (O)
Half hard (1/2H)
18
Piping installation
|
"2 General safety
(a)
Thickness (t)
≥0.80 mm
≥0.99 mm
≥0.80 mm
Installer and user reference guide
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Ø
t
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