Table of contents
Installer reference guide
2
FTXF20~42C5V1B + ATXF20~42C5V1B
Daikin room air conditioner
4P519439-9J – 2021.06
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
1.2 Installer reference guide at a glance .............................................................................................................................. 5
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 Electrical ......................................................................................................................................................... 13
3 Specific installer safety instructions 16
4 About the box 21
4.1 Overview: About the box ................................................................................................................................................ 21
4.2 Indoor unit ...................................................................................................................................................................... 21
4.2.1 To unpack the indoor unit.............................................................................................................................. 21
4.2.2 To remove the accessories from the indoor unit .......................................................................................... 22
5 About the unit 23
5.1 System layout.................................................................................................................................................................. 23
5.2 Operation range.............................................................................................................................................................. 23
6 Unit installation 24
6.1 Preparing the installation site......................................................................................................................................... 24
6.1.1 Installation site requirements of the indoor unit .......................................................................................... 24
6.2 Opening the indoor unit ................................................................................................................................................. 25
6.2.1 To remove the front panel ............................................................................................................................. 25
6.2.2 To re-install the front panel ........................................................................................................................... 26
6.2.3 To remove the front grille .............................................................................................................................. 26
6.2.4 To re-install the front grille ............................................................................................................................ 27
6.2.5 To remove the electrical wiring box cover..................................................................................................... 27
6.2.6 To open the service cover .............................................................................................................................. 27
6.3 Installing the indoor unit ................................................................................................................................................ 28
6.3.1 Precautions when installing the indoor unit.................................................................................................. 28
6.3.2 To install the mounting plate ......................................................................................................................... 28
6.3.3 To drill a wall hole........................................................................................................................................... 28
6.3.4 To remove the pipe port cover ...................................................................................................................... 29
6.3.5 To provide drainage........................................................................................................................................ 29
7 Piping installation 33
7.1 Preparing refrigerant piping ........................................................................................................................................... 33
7.1.1 Refrigerant piping requirements.................................................................................................................... 33
7.1.2 Refrigerant piping insulation.......................................................................................................................... 34
7.2 Connecting the refrigerant piping .................................................................................................................................. 34
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 To connect the refrigerant piping to the indoor unit .................................................................................... 37
8 Electrical installation 38
8.1 Connecting the electrical wiring..................................................................................................................................... 38
8.1.1 About connecting the electrical wiring.......................................................................................................... 38
8.1.2 Precautions when connecting the electrical wiring....................................................................................... 38
8.1.3 Guidelines when connecting the electrical wiring......................................................................................... 39
8.1.4 Specifications of standard wiring components.............................................................................................. 40
8.1.5 To connect the electrical wiring to the indoor unit....................................................................................... 40
9 Finishing the indoor unit installation 42
9.1 To insulate the drain piping, refrigerant piping and interconnection cable.................................................................. 42
9.2 To pass the pipes through the wall hole ........................................................................................................................ 42
9.3 To fix the unit on the mounting plate ............................................................................................................................ 43
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