Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin 3MXM40N2V1B9 Installer's Reference Manual

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Piping installation

7 Piping installation
In this chapter

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

Installer reference guide
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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:
2MXM68
Liquid piping
Gas piping
3MXM40, 3MXM52, 3MXM68, 3AMXM52, 3MXF52, 3AMXF52, 3MXF68
Liquid piping
Gas piping
4MXM68
Liquid piping
Gas piping
5].
2× Ø6.4 mm (1/4")
1× Ø9.5 mm (3/8")
1× Ø12.7 mm (1/2")
3× Ø6.4 mm (1/4")
1× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")
4× Ø6.4 mm (1/4")
2× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")
"2 General safety
2MXM68+3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1D - 2021.03
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