Table of contents
Installer reference guide
2
2(A)MXM40+50 + 2(A)MXF40+50
R32 Split series
4P600463-2C – 2020.08
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
2 General safety precautions 5
2.1 About the documentation .............................................................................................................................................. 5
2.1.1 Meaning of warnings and symbols ................................................................................................................ 5
2.2 For the installer............................................................................................................................................................... 6
2.2.1 General ........................................................................................................................................................... 6
2.2.2 Installation site ............................................................................................................................................... 7
2.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11
2.2.4 Brine................................................................................................................................................................ 12
2.2.5 Water .............................................................................................................................................................. 13
2.2.6 Electrical ......................................................................................................................................................... 13
3 Specific installer safety instructions 16
4 About the box 22
4.1 Overview: About the box ................................................................................................................................................ 22
4.2 Outdoor unit ................................................................................................................................................................... 22
4.2.1 To unpack the outdoor unit ........................................................................................................................... 22
4.2.2 To remove the accessories from the outdoor unit........................................................................................ 23
5 About the unit 25
5.1 Overview: About the unit ............................................................................................................................................... 25
5.2 Identification ................................................................................................................................................................... 25
5.2.1 Identification label: Outdoor unit .................................................................................................................. 25
6 Unit installation 26
6.1 Preparing the installation site......................................................................................................................................... 26
6.1.1 Installation site requirements of the outdoor unit........................................................................................ 27
6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 29
6.2 Opening the unit ............................................................................................................................................................. 30
6.2.1 About opening the unit .................................................................................................................................. 30
6.2.2 To open the outdoor unit............................................................................................................................... 30
6.3 Mounting the outdoor unit............................................................................................................................................. 30
6.3.1 About mounting the outdoor unit ................................................................................................................. 30
6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 31
6.3.3 To provide the installation structure ............................................................................................................. 31
6.3.4 To install the outdoor unit ............................................................................................................................. 32
6.3.5 To provide drainage........................................................................................................................................ 32
6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 33
7 Piping installation 34
7.1 Preparing refrigerant piping ........................................................................................................................................... 34
7.1.1 Refrigerant piping requirements.................................................................................................................... 34
7.1.2 Refrigerant piping insulation.......................................................................................................................... 35
7.1.3 Refrigerant piping length and height difference ........................................................................................... 35
7.2 Connecting the refrigerant piping .................................................................................................................................. 36
7.2.1 About connecting the refrigerant piping ....................................................................................................... 36
7.2.2 Precautions when connecting the refrigerant piping.................................................................................... 36
7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 38
7.2.4 Pipe bending guidelines ................................................................................................................................. 38
7.2.5 To flare the pipe end ...................................................................................................................................... 38
7.2.6 Connections between outdoor and indoor unit using reducers................................................................... 39
7.2.7 Using the stop valve and service port............................................................................................................ 40
7.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 42
7.3 Checking the refrigerant piping...................................................................................................................................... 42
7.3.1 About checking the refrigerant piping........................................................................................................... 42
7.3.2 Precautions when checking the refrigerant piping........................................................................................ 43
7.3.3 To check for leaks ........................................................................................................................................... 43
7.3.4 To perform vacuum drying............................................................................................................................. 44
8 Charging refrigerant 46
8.1 About charging refrigerant ............................................................................................................................................. 46
8.2 About the refrigerant...................................................................................................................................................... 47
8.3 Precautions when charging refrigerant.......................................................................................................................... 48
8.4 To determine the additional refrigerant amount .......................................................................................................... 48
