16
|
Piping installation
16 Piping installation
In this chapter
16.1 Preparing refrigerant piping
16.1.1 Refrigerant piping requirements
Installer and user reference guide
66
16.1
Preparing refrigerant piping ...................................................................................................................................................
16.1.1
Refrigerant piping requirements ...........................................................................................................................
16.1.2
Refrigerant piping material ....................................................................................................................................
16.1.3
To select the piping size .........................................................................................................................................
16.1.4
16.1.5
16.2
Connecting the refrigerant piping..........................................................................................................................................
16.2.1
16.2.2
16.2.3
Pipe bending guidelines .........................................................................................................................................
16.2.4
To braze the pipe end ............................................................................................................................................
16.2.5
16.2.6
To remove the pinched pipes ................................................................................................................................
16.2.7
16.2.8
16.2.9
16.3
Checking the refrigerant piping..............................................................................................................................................
16.3.1
16.3.2
16.3.3
16.3.4
To perform a leak test............................................................................................................................................
16.3.5
To perform vacuum drying ....................................................................................................................................
16.3.6
16.4
Charging refrigerant ...............................................................................................................................................................
16.4.1
About charging refrigerant ....................................................................................................................................
16.4.2
16.4.3
16.4.4
To charge refrigerant .............................................................................................................................................
16.4.5
16.4.6
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
NOTICE
The refrigerant R410A requires strict cautions for keeping the system clean, dry and
tight.
▪
Clean and dry: foreign materials (including mineral oils or moisture) should be
prevented from getting mixed into the system.
▪
Tight: R410A does not contain any chlorine, does not destroy the ozone layer,
and does not reduce earth's protection against harmful ultraviolet radiation.
R410A can contribute to the greenhouse effect if it is released. Therefore pay
special attention to check the tightness of the installation.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
9].
"2 General safety
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B - 2021.12
66
66
67
67
69
69
71
71
71
72
72
72
73
75
76
78
78
78
79
79
80
81
81
82
82
83
83
84
87
87