Table of Contents
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Table of contents
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 ................................................................................................................................................................... 20
4.1.1
To unpack the outdoor unit ........................................................................................................................... 20
4.1.2
To handle the outdoor unit ............................................................................................................................ 20
4.1.3
To remove the accessories from the outdoor unit........................................................................................ 21
5.1
Identification ................................................................................................................................................................... 22
5.1.1
Identification label: Outdoor unit .................................................................................................................. 22
6.1
Preparing the installation site......................................................................................................................................... 23
6.1.1
Installation site requirements of the outdoor unit........................................................................................ 24
6.1.2
Additional installation site requirements of the outdoor unit in cold climates............................................ 26
6.2
Opening the unit ............................................................................................................................................................. 27
6.2.1
About opening the unit .................................................................................................................................. 27
6.2.2
To open the outdoor unit............................................................................................................................... 27
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 .............................................................................................. 28
6.3.3
To provide the installation structure ............................................................................................................. 28
6.3.4
To install the outdoor unit ............................................................................................................................. 29
6.3.5
To provide drainage........................................................................................................................................ 29
6.3.6
To prevent the outdoor unit from falling over .............................................................................................. 30
7.1
Preparing refrigerant piping ........................................................................................................................................... 32
7.1.1
Refrigerant piping requirements.................................................................................................................... 32
7.1.2
Refrigerant piping insulation.......................................................................................................................... 33
7.1.3
Refrigerant piping length and height difference ........................................................................................... 33
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
Connections between outdoor and indoor unit using reducers ................................................................... 37
7.2.7
Using the stop valve and service port............................................................................................................ 38
7.2.8
To connect the refrigerant piping to the outdoor unit ................................................................................. 40
7.3
Checking the refrigerant piping...................................................................................................................................... 40
7.3.1
About checking the refrigerant piping ........................................................................................................... 40
7.3.2
Precautions when checking the refrigerant piping........................................................................................ 41
7.3.3
To check for leaks ........................................................................................................................................... 41
7.3.4
To perform vacuum drying............................................................................................................................. 41
8.1
About charging refrigerant ............................................................................................................................................. 43
8.2
About the refrigerant...................................................................................................................................................... 44
8.3
Precautions when charging refrigerant.......................................................................................................................... 45
8.4
To determine the additional refrigerant amount .......................................................................................................... 45
8.5
To determine the complete recharge amount .............................................................................................................. 45
8.6
To charge additional refrigerant..................................................................................................................................... 45
8.7
To fix the fluorinated greenhouse gases label ............................................................................................................... 46
8.8
To check for refrigerant leaks after charging ................................................................................................................. 46
4
4
5
7
7
7
8
15
20
22
23
32
43
4MWXM-A9
R32 Split series
4P708645-1 - 2022.09
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