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Installer reference guide
2
Table of contents
1.1
About this document ......................................................................................................................................................
1.1.1
Meaning of warnings and symbols ................................................................................................................
2.1
For the installer ...............................................................................................................................................................
2.1.1
General ...........................................................................................................................................................
2.1.2
Installation site ...............................................................................................................................................
2.1.3
Refrigerant - in case of R410A or R32.......................................................................................................... 11
2.1.4
Electrical ......................................................................................................................................................... 12
4.1
Outdoor unit ................................................................................................................................................................... 21
4.1.1
To unpack the outdoor unit ........................................................................................................................... 21
4.1.2
To handle the outdoor unit ............................................................................................................................ 21
4.1.3
To remove the accessories from the outdoor unit........................................................................................ 22
5.1
Identification ................................................................................................................................................................... 23
5.1.1
Identification label: Outdoor unit .................................................................................................................. 23
6.1
Preparing the installation site......................................................................................................................................... 24
6.1.1
Installation site requirements of the outdoor unit........................................................................................ 25
6.1.2
Additional installation site requirements of the outdoor unit in cold climates............................................ 27
6.2
Opening the unit ............................................................................................................................................................. 28
6.2.1
About opening the unit .................................................................................................................................. 28
6.2.2
To open the outdoor unit............................................................................................................................... 28
6.3
Mounting the outdoor unit............................................................................................................................................. 28
6.3.1
About mounting the outdoor unit ................................................................................................................. 28
6.3.2
Precautions when mounting the outdoor unit .............................................................................................. 29
6.3.3
To provide the installation structure ............................................................................................................. 29
6.3.4
To install the outdoor unit ............................................................................................................................. 29
6.3.5
To provide drainage........................................................................................................................................ 30
7.1
Preparing refrigerant piping ........................................................................................................................................... 31
7.1.1
Refrigerant piping requirements.................................................................................................................... 31
7.1.2
Refrigerant piping insulation.......................................................................................................................... 32
7.1.3
Refrigerant piping length and height difference ........................................................................................... 32
7.2
Connecting the refrigerant piping .................................................................................................................................. 32
7.2.1
About connecting the refrigerant piping ....................................................................................................... 33
7.2.2
Precautions when connecting the refrigerant piping.................................................................................... 33
7.2.3
Guidelines when connecting the refrigerant piping...................................................................................... 34
7.2.4
Pipe bending guidelines ................................................................................................................................. 35
7.2.5
To flare the pipe end ...................................................................................................................................... 35
7.2.6
Using the stop valve and service port............................................................................................................ 36
7.2.7
To connect the refrigerant piping to the outdoor unit ................................................................................. 37
7.3
Checking the refrigerant piping...................................................................................................................................... 38
7.3.1
About checking the refrigerant piping ........................................................................................................... 38
7.3.2
Precautions when checking the refrigerant piping........................................................................................ 38
7.3.3
To check for leaks ........................................................................................................................................... 39
7.3.4
To perform vacuum drying............................................................................................................................. 39
8.1
About charging refrigerant ............................................................................................................................................. 41
8.2
About the refrigerant...................................................................................................................................................... 42
8.3
Precautions when charging refrigerant.......................................................................................................................... 43
8.4
To determine the additional refrigerant amount .......................................................................................................... 43
8.5
To determine the complete recharge amount .............................................................................................................. 43
8.6
To charge additional refrigerant..................................................................................................................................... 43
8.7
To check refrigerant piping joints for leaks after charging refrigerant ......................................................................... 44
8.8
To fix the fluorinated greenhouse gases label ............................................................................................................... 44
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4
5
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7
7
8
15
21
23
24
31
41
45
RXTJ-A_RXTA-C_RXTM-A_RXTP-A
R32 split series
4P728168-1 - 2023.03
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