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7 Piping installation
In this chapter
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
2(A)MXM40+50 + 2(A)MXF40+50
R32 Split series
4P600463-3D - 2021.03
7.1
Preparing refrigerant piping ...................................................................................................................................................
7.1.1
Refrigerant piping requirements ...........................................................................................................................
7.1.2
Refrigerant piping insulation..................................................................................................................................
7.1.3
Refrigerant piping length and height difference ...................................................................................................
7.2
Connecting the refrigerant piping..........................................................................................................................................
7.2.1
About connecting the refrigerant piping...............................................................................................................
7.2.2
Precautions when connecting the refrigerant piping............................................................................................
7.2.3
Guidelines when connecting the refrigerant piping..............................................................................................
7.2.4
Pipe bending guidelines .........................................................................................................................................
7.2.5
To flare the pipe end..............................................................................................................................................
7.2.6
Connections between outdoor and indoor unit using reducers...........................................................................
7.2.7
Using the stop valve and service port....................................................................................................................
7.2.8
To connect the refrigerant piping to the outdoor unit .........................................................................................
7.3
Checking the refrigerant piping..............................................................................................................................................
7.3.1
About checking the refrigerant piping...................................................................................................................
7.3.2
Precautions when checking the refrigerant piping ...............................................................................................
7.3.3
To check for leaks...................................................................................................................................................
7.3.4
To perform vacuum drying ....................................................................................................................................
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪
Piping material: Phosphoric acid deoxidised seamless copper.
▪
Piping diameter:
Class 40
Liquid piping
Gas piping
Class 50
Liquid piping
Gas piping
▪
Piping temper grade and thickness:
Outer diameter (Ø)
6.4 mm (1/4")
9.5 mm (3/8")
12.7 mm (1/2")
5].
2× Ø6.4 mm (1/4")
2× Ø9.5 mm (3/8")
2× Ø6.4 mm (1/4")
1× Ø9.5 mm (3/8")
1× Ø12.7 mm (1/2")
Temper grade
Annealed (O)
7
Piping installation
|
"2 General safety
(a)
Thickness (t)
≥0.8 mm
Installer reference guide
33
33
34
34
35
35
35
36
37
37
38
39
41
41
41
42
42
43
Ø
t
33
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