Table of contents
Installer reference guide
2
FTXF20~42F5V1B
Split system air conditioners
4P769827-11D – 2024.09
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......................................................................................................... 9
2.2.4 Brine ............................................................................................................................................................... 11
2.2.5 Water ............................................................................................................................................................. 12
2.2.6 Electrical......................................................................................................................................................... 12
3 Specific installer safety instructions 14
4 About the box 19
4.1 Overview: About the box ............................................................................................................................................... 19
4.2 Indoor unit...................................................................................................................................................................... 19
4.2.1 To unpack the indoor unit ............................................................................................................................. 20
4.2.2 To remove the accessories from the indoor unit.......................................................................................... 20
5 About the unit 22
5.1 System layout ................................................................................................................................................................. 22
5.2 Operation range ............................................................................................................................................................. 22
5.3 About the wireless LAN .................................................................................................................................................. 23
5.3.1 Precautions when using the wireless LAN..................................................................................................... 23
5.3.2 Basic parameters ........................................................................................................................................... 23
5.3.3 Setting the wireless LAN ................................................................................................................................ 23
6 Unit installation 25
6.1 Preparing the installation site ........................................................................................................................................ 25
6.1.1 Installation site requirements of the indoor unit.......................................................................................... 25
6.2 Opening the indoor unit................................................................................................................................................. 27
6.2.1 To remove the front panel ............................................................................................................................ 27
6.2.2 To re-install the front panel........................................................................................................................... 27
6.2.3 To remove the front grille ............................................................................................................................. 27
6.2.4 To re-install the front grille............................................................................................................................ 28
6.2.5 To remove the electrical wiring box cover.................................................................................................... 28
6.2.6 To open the service cover ............................................................................................................................. 28
6.3 Installing the indoor unit................................................................................................................................................ 29
6.3.1 Precautions when installing the indoor unit ................................................................................................. 29
6.3.2 To install the mounting plate ........................................................................................................................ 29
6.3.3 To drill a wall hole.......................................................................................................................................... 30
6.3.4 To remove the pipe port cover...................................................................................................................... 31
6.3.5 To provide drainage....................................................................................................................................... 31
7 Piping installation 35
7.1 Preparing refrigerant piping........................................................................................................................................... 35
7.1.1 Refrigerant piping requirements................................................................................................................... 35
7.1.2 Refrigerant piping insulation ......................................................................................................................... 36
7.2 Connecting the refrigerant piping.................................................................................................................................. 36
7.2.1 About connecting the refrigerant piping ...................................................................................................... 36
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................................................................................................................................. 38
7.2.5 To flare the pipe end ..................................................................................................................................... 38
7.2.6 To connect the refrigerant piping to the indoor unit ................................................................................... 39
8 Electrical installation 40
8.1 Preparing electrical wiring ............................................................................................................................................. 40
8.1.1 About preparing electrical wiring.................................................................................................................. 40
8.2 Connecting the electrical wiring .................................................................................................................................... 40
8.2.1 About connecting the electrical wiring ......................................................................................................... 40
8.2.2 Precautions when connecting the electrical wiring...................................................................................... 41
8.2.3 Guidelines when connecting the electrical wiring........................................................................................ 41
8.2.4 Specifications of standard wiring components............................................................................................. 43
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