Table of contents
Installer reference guide
2
RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)
R32 Split system air conditioners
4P519439-12M – 2021.02
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.......................................................................................................... 10
2.2.4 Electrical ......................................................................................................................................................... 12
3 Specific installer safety instructions 15
4 About the box 21
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 About the unit 24
5.1 Overview: About the units and options.......................................................................................................................... 24
5.2 Identification ................................................................................................................................................................... 24
5.2.1 Identification label: Outdoor unit .................................................................................................................. 24
6 Unit installation 25
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 and closing the unit.......................................................................................................................................... 29
6.2.1 About opening the units................................................................................................................................. 29
6.2.2 To open the outdoor unit............................................................................................................................... 29
6.2.3 To close the outdoor unit............................................................................................................................... 29
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.............................................................................................. 30
6.3.3 To provide the installation structure ............................................................................................................. 30
6.3.4 To install the outdoor unit ............................................................................................................................. 31
6.3.5 To provide drainage........................................................................................................................................ 31
6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 32
7 Piping installation 33
7.1 Preparing refrigerant piping ........................................................................................................................................... 33
7.1.1 Refrigerant piping requirements.................................................................................................................... 33
7.1.2 Refrigerant piping insulation.......................................................................................................................... 34
7.1.3 Refrigerant piping length and height difference ........................................................................................... 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.................................................................................... 35
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 ...................................................................................................................................... 37
7.2.6 Using the stop valve and service port............................................................................................................ 37
7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 39
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........................................................................................ 40
7.3.3 To check for leaks ........................................................................................................................................... 40
7.3.4 To perform vacuum drying............................................................................................................................. 41
8 Charging refrigerant 43
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
