Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin RXTM30R2V1B Installer's Reference Manual

7 |

Piping installation

7 Piping installation
In this chapter

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

Refrigerant piping diameter
Refrigerant piping material
Installer reference guide
32
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 ....................................................................................................................................
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
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.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Liquid piping
Ø6.4 mm
▪ 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")
7].
Temper grade
Annealed (O) ≥0.8 mm
Annealed (O)
"2 General safety
Gas piping
Ø9.5 mm
(a)
Thickness (t)
RXTM-R_RXTP-R_ARXTP-R_RXTA-B
4P518023-11H - 2021.03
32
32
33
33
33
33
34
35
36
36
36
38
38
38
39
39
40
Ø
t
R32 split series