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Piping installation
16 Piping installation
In this chapter
16.1 Preparing refrigerant piping
16.1.1 Refrigerant piping requirements
Installer and user reference guide
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16.1
Preparing refrigerant piping ...................................................................................................................................................
16.1.1
Refrigerant piping requirements ...........................................................................................................................
16.1.2
Refrigerant piping material ....................................................................................................................................
16.1.3
16.1.4
To select the piping size .........................................................................................................................................
16.1.5
16.1.6
16.2
16.2.1
16.2.2
16.2.3
To handle the stop valve ........................................................................................................................................
16.2.4
To handle the service port .....................................................................................................................................
16.2.5
Tightening torques .................................................................................................................................................
16.3
Connecting the refrigerant piping..........................................................................................................................................
16.3.1
16.3.2
16.3.3
To remove the spun pipes .....................................................................................................................................
16.3.4
16.3.5
To braze the pipe end ............................................................................................................................................
16.3.6
Guidelines to connect T-joints ...............................................................................................................................
16.3.7
Guidelines to install a dryer ...................................................................................................................................
16.3.8
16.3.9
16.4
Checking the refrigerant piping..............................................................................................................................................
16.4.1
16.4.2
16.4.3
16.4.4
To perform a leak test............................................................................................................................................
16.4.5
To perform vacuum drying ....................................................................................................................................
16.5
Insulating the refrigerant piping.............................................................................................................................................
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
WARNING
The unit is partially factory charged with refrigerant R744.
NOTICE
The refrigerant R744 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: R744 does not contain any chlorine, does not destroy the ozone layer, and
does not reduce earth's protection against harmful ultraviolet radiation. R744 can
contribute to the greenhouse effect if it is released. Therefore pay special
attention to check the tightness of the installation.
6].
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"2 General safety
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 - 2020.08