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7 Piping installation
In this chapter
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
Refrigerant piping diameter
Refrigerant piping material
RXF50~71D5V1B
R32 split series
4P519439-18T - 2022.06
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
Using the stop valve and service port....................................................................................................................
7.2.7
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 ....................................................................................................................................
CAUTION
Piping and joints of a split system shall be made with permanent joints when inside
an occupied space except joints directly connecting the piping to the indoor units.
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.
Use the same diameters as the connections on the outdoor units:
Liquid piping
Ø6.4
▪
Piping material: phosphoric acid deoxidised seamless copper
▪
Flare connections: Only use annealed material.
▪
Piping temper grade and thickness:
7].
Pipe outer diameter (mm)
7
Piping installation
|
"2 General safety
Gas piping
Ø12.7
Installer reference guide
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