Table of contents
Installer and user reference guide
3
EKVDX32~100A2VEB
VRV system air conditioner
4P664010-1 – 2021.08
13 About the box 49
13.1 Overview: About the box ................................................................................................................................................ 49
13.2 Indoor unit ...................................................................................................................................................................... 49
13.2.1 To unpack and handle the unit ...................................................................................................................... 49
13.2.2 To remove the accessories from the indoor unit .......................................................................................... 50
13.2.3 To remove the duct flanges from the indoor unit......................................................................................... 51
14 About the units and options 52
14.1 Identification ................................................................................................................................................................... 52
14.1.1 Identification label: Indoor unit ..................................................................................................................... 52
14.2 About the indoor unit ..................................................................................................................................................... 52
14.3 System layout.................................................................................................................................................................. 53
14.4 Combining units and options.......................................................................................................................................... 54
14.4.1 Possible options for the indoor unit............................................................................................................... 55
14.4.2 Compatibility with outdoor unit..................................................................................................................... 55
14.4.3 Compatibility with VAM models..................................................................................................................... 55
15 Unit installation 56
15.1 Preparing the installation site......................................................................................................................................... 56
15.1.1 Installation site requirements of the indoor unit .......................................................................................... 56
15.2 Mounting the indoor unit ............................................................................................................................................... 58
15.2.1 Guidelines when installing the indoor unit.................................................................................................... 58
15.2.2 Guidelines when installing the ducting.......................................................................................................... 59
15.2.3 Guidelines when installing the drain piping................................................................................................... 60
15.2.4 To connect the drain piping to the indoor unit ............................................................................................. 61
16 Piping installation 63
16.1 Preparing refrigerant piping ........................................................................................................................................... 63
16.1.1 Refrigerant piping requirements.................................................................................................................... 63
16.1.2 Refrigerant piping insulation.......................................................................................................................... 64
16.2 Connecting the refrigerant piping .................................................................................................................................. 64
16.2.1 About connecting the refrigerant piping ....................................................................................................... 64
16.2.2 Precautions when connecting the refrigerant piping.................................................................................... 65
16.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 66
16.2.4 Pipe bending guidelines ................................................................................................................................. 66
16.2.5 To flare the pipe end ...................................................................................................................................... 66
16.2.6 To connect the refrigerant piping to the indoor unit .................................................................................... 67
17 Electrical installation 69
17.1 About connecting the electrical wiring .......................................................................................................................... 69
17.1.1 Precautions when connecting the electrical wiring....................................................................................... 69
17.1.2 Guidelines when connecting the electrical wiring......................................................................................... 70
17.1.3 Specifications of standard wiring components.............................................................................................. 71
17.2 To connect the electrical wiring to the indoor unit ....................................................................................................... 72
17.3 To connect the external outputs .................................................................................................................................... 74
17.4 To connect the external input ........................................................................................................................................ 74
18 System configuration 76
18.1 Independent system ....................................................................................................................................................... 76
18.2 Central control system.................................................................................................................................................... 77
19 Configuration 78
19.1 To set the discharge temperature correction factor ..................................................................................................... 78
19.2 To deactivate the R32 safety system.............................................................................................................................. 78
19.3 About external input switching (T1/T2) ......................................................................................................................... 79
19.4 Field settings ................................................................................................................................................................... 80
20 Commissioning 82
20.1 Overview: Commissioning .............................................................................................................................................. 82
20.2 Precautions when commissioning .................................................................................................................................. 82
20.3 Checklist before commissioning ..................................................................................................................................... 82
20.4 To perform a test run...................................................................................................................................................... 84
21 Hand-over to the user 85
22 Maintenance and service 86
22.1 Checklist for yearly maintenance of the indoor unit ..................................................................................................... 86
23 Troubleshooting 87
23.1 Solving problems based on error codes ......................................................................................................................... 87
23.1.1 Error codes: Overview .................................................................................................................................... 87
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