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7 Piping installation
In this chapter
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
7.1.2 Refrigerant piping length and height difference
RXP20~35N5V1B+ARXP20~35N5V1B
R32 split series
4P519439-22V - 2022.10
7.1
Preparing refrigerant piping ...................................................................................................................................................
7.1.1
Refrigerant piping requirements ...........................................................................................................................
7.1.2
Refrigerant piping length and height difference ...................................................................................................
7.1.3
Refrigerant piping insulation..................................................................................................................................
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 ....................................................................................................................................
7.4
Charging refrigerant ...............................................................................................................................................................
7.4.1
About charging refrigerant ....................................................................................................................................
7.4.2
About the refrigerant .............................................................................................................................................
7.4.3
Precautions when charging refrigerant .................................................................................................................
7.4.4
To determine the additional refrigerant amount..................................................................................................
7.4.5
To determine the complete recharge amount......................................................................................................
7.4.6
To charge additional refrigerant ............................................................................................................................
7.4.7
To fix the fluorinated greenhouse gases label.......................................................................................................
INFORMATION
Also read the precautions and requirements in the
precautions" [
4
▪
Piping material: phosphoric acid deoxidised seamless copper
▪
Piping diameter:
Liquid piping
Gas piping
▪
Piping temper grade and thickness:
Outer diameter (Ø)
6.4 mm (1/4")
Annealed (O)
9.5 mm (3/8")
Annealed (O)
(a)
Depending on the applicable legislation and the maximum working pressure of the unit
(see "PS High" on the unit name plate), larger piping thickness might be required.
What?
Maximum allowable pipe length
6].
Ø6.4 mm (1/4")
Ø9.5 mm (3/8")
Temper grade
≥0.8 mm
7
Piping installation
|
"2 General safety
(a)
Thickness (t)
Distance
20 m
Installer reference guide
33
33
33
34
34
34
34
36
36
36
37
38
39
39
39
40
40
41
41
42
43
43
43
44
44
Ø
t
33
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