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Installer reference guide
2
Table of contents
1.1
About this document ......................................................................................................................................................
1.2
Installer reference guide at a glance ..............................................................................................................................
2.1
About the documentation ..............................................................................................................................................
2.1.1
Meaning of warnings and symbols ................................................................................................................
2.2
For the installer ...............................................................................................................................................................
2.2.1
General ...........................................................................................................................................................
2.2.2
Installation site ...............................................................................................................................................
2.2.3
Refrigerant - in case of R410A or R32.......................................................................................................... 11
2.2.4
Electrical ......................................................................................................................................................... 13
4.1
Overview: About the box ................................................................................................................................................ 21
4.2
Outdoor unit ................................................................................................................................................................... 21
4.2.1
To unpack the outdoor unit ........................................................................................................................... 21
4.2.2
To remove the accessories from the outdoor unit........................................................................................ 22
5.1
Overview: About the units and options.......................................................................................................................... 24
5.2
Identification ................................................................................................................................................................... 24
5.2.1
Identification label: Outdoor unit .................................................................................................................. 24
6.1
Preparing the installation site......................................................................................................................................... 25
6.1.1
Installation site requirements of the outdoor unit........................................................................................ 26
6.1.2
Additional installation site requirements of the outdoor unit in cold climates............................................ 28
6.2
Opening the units ........................................................................................................................................................... 29
6.2.1
About opening the units................................................................................................................................. 29
6.2.2
To open the outdoor unit............................................................................................................................... 29
6.3
Mounting the outdoor unit............................................................................................................................................. 29
6.3.1
About mounting the outdoor unit ................................................................................................................. 29
6.3.2
Precautions when mounting the outdoor unit .............................................................................................. 30
6.3.3
To provide the installation structure ............................................................................................................. 30
6.3.4
To install the outdoor unit ............................................................................................................................. 30
6.3.5
To provide drainage........................................................................................................................................ 31
6.3.6
To prevent the outdoor unit from falling over .............................................................................................. 31
7.1
Preparing refrigerant piping ........................................................................................................................................... 33
7.1.1
Refrigerant piping requirements.................................................................................................................... 33
7.1.2
Refrigerant piping length and height difference ........................................................................................... 33
7.1.3
Refrigerant piping insulation.......................................................................................................................... 34
7.2
Connecting the refrigerant piping .................................................................................................................................. 34
7.2.1
About connecting the refrigerant piping ....................................................................................................... 34
7.2.2
Precautions when connecting the refrigerant piping.................................................................................... 34
7.2.3
Guidelines when connecting the refrigerant piping...................................................................................... 36
7.2.4
Pipe bending guidelines ................................................................................................................................. 36
7.2.5
To flare the pipe end ...................................................................................................................................... 36
7.2.6
Using the stop valve and service port............................................................................................................ 37
7.2.7
To connect the refrigerant piping to the outdoor unit ................................................................................. 38
7.3
Checking the refrigerant piping...................................................................................................................................... 39
7.3.1
About checking the refrigerant piping ........................................................................................................... 39
7.3.2
Precautions when checking the refrigerant piping........................................................................................ 39
7.3.3
To check for leaks ........................................................................................................................................... 40
7.3.4
To perform vacuum drying............................................................................................................................. 40
7.4
Charging refrigerant........................................................................................................................................................ 41
7.4.1
About charging refrigerant............................................................................................................................. 41
7.4.2
About the refrigerant ..................................................................................................................................... 42
7.4.3
Precautions when charging refrigerant ......................................................................................................... 43
7.4.4
To determine the additional refrigerant amount .......................................................................................... 43
7.4.5
To determine the complete recharge amount .............................................................................................. 43
7.4.6
To charge additional refrigerant .................................................................................................................... 44
4
4
5
6
6
6
7
7
8
16
21
24
25
33
RXP20~35N5V1B+ARXP20~35N5V1B
R32 split series
4P519439-22V - 2022.10
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