Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin RXTJ30A2V1B Installer's Reference Manual

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

Refrigerant piping diameter
Refrigerant piping material
RXTJ-A_RXTA-C_RXTM-A_RXTP-A
R32 split series
4P728168-1 - 2023.03
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 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.
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
Ø9.5
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