Table of contents
Installer reference guide
2
RXD25+35A5V1B
R32 split series
4P715853-4B – 2024.05
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 Brine ............................................................................................................................................................... 12
2.2.5 Water ............................................................................................................................................................. 12
2.2.6 Electrical......................................................................................................................................................... 13
2.2.7 Gas.................................................................................................................................................................. 14
2.2.8 Gas exhaust.................................................................................................................................................... 15
2.2.9 Local legislation.............................................................................................................................................. 15
3 Specific installer safety instructions 17
4 About the box 23
4.1 Outdoor unit................................................................................................................................................................... 23
4.1.1 To unpack the outdoor unit........................................................................................................................... 23
4.1.2 To handle the outdoor unit ........................................................................................................................... 24
4.1.3 To remove the accessories from the outdoor unit....................................................................................... 24
5 About the unit 25
5.1 Overview: About the units and options ......................................................................................................................... 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 and closing the unit ......................................................................................................................................... 30
6.2.1 About opening the units ................................................................................................................................ 30
6.2.2 To open the outdoor unit .............................................................................................................................. 30
6.2.3 To close the outdoor unit.............................................................................................................................. 30
6.3 Mounting the outdoor unit............................................................................................................................................ 31
6.3.1 About mounting the outdoor unit................................................................................................................. 31
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.................................................................................................................................. 35
7.2.1 About connecting the refrigerant piping ...................................................................................................... 35
7.2.2 Precautions when connecting the refrigerant piping ................................................................................... 36
7.2.3 Guidelines when connecting the refrigerant piping ..................................................................................... 37
7.2.4 Pipe bending guidelines................................................................................................................................. 37
7.2.5 To flare the pipe end ..................................................................................................................................... 38
7.2.6 Using the stop valve and service port ........................................................................................................... 38
7.2.7 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 ............................................................................................................................ 42
8 Charging refrigerant 44
8.1 About charging refrigerant............................................................................................................................................. 44
