Table of contents
Installer reference guide
2
RXA-A9, RXM-R9, ARXM-R9
R32 Split system air conditioners
4P519439-12W – 2022.11
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
2 General safety precautions 6
2.1 About the documentation .............................................................................................................................................. 6
2.1.1 Meaning of warnings and symbols ................................................................................................................ 6
2.2 For the installer............................................................................................................................................................... 7
2.2.1 General ........................................................................................................................................................... 7
2.2.2 Installation site ............................................................................................................................................... 8
2.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11
2.2.4 Brine................................................................................................................................................................ 13
2.2.5 Water .............................................................................................................................................................. 13
2.2.6 Electrical ......................................................................................................................................................... 14
2.2.7 Gas .................................................................................................................................................................. 15
2.2.8 Gas exhaust..................................................................................................................................................... 16
2.2.9 Local legislation .............................................................................................................................................. 16
3 Specific installer safety instructions 18
4 About the box 24
4.1 Outdoor unit ................................................................................................................................................................... 24
4.1.1 To unpack the outdoor unit ........................................................................................................................... 24
4.1.2 To handle the outdoor unit............................................................................................................................ 24
4.1.3 To remove the accessories from the outdoor unit........................................................................................ 25
5 About the unit 26
5.1 Overview: About the units and options.......................................................................................................................... 26
5.2 Identification ................................................................................................................................................................... 26
5.2.1 Identification label: Outdoor unit .................................................................................................................. 26
6 Unit installation 27
6.1 Preparing the installation site......................................................................................................................................... 27
6.1.1 Installation site requirements of the outdoor unit........................................................................................ 28
6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 30
6.2 Opening and closing the unit.......................................................................................................................................... 31
6.2.1 About opening the units................................................................................................................................. 31
6.2.2 To open the outdoor unit............................................................................................................................... 31
6.2.3 To close the outdoor unit............................................................................................................................... 31
6.3 Mounting the outdoor unit............................................................................................................................................. 32
6.3.1 About mounting the outdoor unit ................................................................................................................. 32
6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 32
6.3.3 To provide the installation structure ............................................................................................................. 32
6.3.4 To install the outdoor unit ............................................................................................................................. 33
6.3.5 To provide drainage........................................................................................................................................ 33
6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 34
7 Piping installation 35
7.1 Preparing refrigerant piping ........................................................................................................................................... 35
7.1.1 Refrigerant piping requirements.................................................................................................................... 35
7.1.2 Refrigerant piping insulation.......................................................................................................................... 36
7.1.3 Refrigerant piping length and height difference ........................................................................................... 36
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.................................................................................... 37
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 ...................................................................................................................................... 39
7.2.6 Using the stop valve and service port............................................................................................................ 39
7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 41
7.3 Checking the refrigerant piping...................................................................................................................................... 41
7.3.1 About checking the refrigerant piping........................................................................................................... 41
7.3.2 Precautions when checking the refrigerant piping........................................................................................ 42
7.3.3 To check for leaks ........................................................................................................................................... 42
7.3.4 To perform vacuum drying............................................................................................................................. 43
8 Charging refrigerant 45
8.1 About charging refrigerant ............................................................................................................................................. 45
