Table of contents
Installer reference guide
2
RXM-A(9)(8), ARXM-A(9)(8), RXP-N8
R32 split series
4P769827-4C – 2024.07
Table of contents
1 About the documentation 4
1.1 About this document...................................................................................................................................................... 4
1.1.1 Meaning of warnings and symbols................................................................................................................ 5
2 General safety precautions 7
2.1 For the installer .............................................................................................................................................................. 7
2.1.1 General........................................................................................................................................................... 7
2.1.2 Installation site............................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32......................................................................................................... 11
2.1.4 Electrical......................................................................................................................................................... 12
3 Specific installer safety instructions 15
4 About the box 21
4.1 Outdoor unit................................................................................................................................................................... 21
4.1.1 To unpack the outdoor unit........................................................................................................................... 21
4.1.2 To handle the outdoor unit ........................................................................................................................... 21
4.1.3 To remove the accessories from the outdoor unit....................................................................................... 22
5 About the unit 23
5.1 Identification .................................................................................................................................................................. 23
5.1.1 Identification label: Outdoor unit.................................................................................................................. 23
6 Unit installation 24
6.1 Preparing the installation site ........................................................................................................................................ 24
6.1.1 Installation site requirements of the outdoor unit ....................................................................................... 25
6.1.2 Additional installation site requirements of the outdoor unit in cold climates ........................................... 27
6.2 Opening the unit ............................................................................................................................................................ 28
6.2.1 About opening the unit.................................................................................................................................. 28
6.2.2 To open the outdoor unit .............................................................................................................................. 28
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 ............................................................................................. 29
6.3.3 To provide the installation structure............................................................................................................. 29
6.3.4 To install the outdoor unit............................................................................................................................. 30
6.3.5 To provide drainage....................................................................................................................................... 30
6.3.6 To prevent the outdoor unit from falling over.............................................................................................. 31
7 Piping installation 32
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.................................................................................................................................. 33
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 ..................................................................................... 35
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
8 Charging refrigerant 42
8.1 About charging refrigerant............................................................................................................................................. 42
8.2 About the refrigerant ..................................................................................................................................................... 43
8.3 Precautions when charging refrigerant ......................................................................................................................... 44
8.4 To determine the additional refrigerant amount.......................................................................................................... 44
8.5 To determine the complete recharge amount.............................................................................................................. 44
8.6 To charge additional refrigerant.................................................................................................................................... 44
8.7 To check refrigerant piping joints for leaks after charging refrigerant......................................................................... 45
8.8 To fix the fluorinated greenhouse gases label............................................................................................................... 45
