Table of contents
Installer and user reference guide
3
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 47
10.2.9 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 47
10.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ................................................................. 47
10.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..................................................................................... 48
10.2.12 Symptom: Dust comes out of the unit .......................................................................................................... 48
10.2.13 Symptom: The units can give off odours....................................................................................................... 48
10.2.14 Symptom: The outdoor unit fan does not spin............................................................................................. 48
10.2.15 Symptom: The display shows "88" ................................................................................................................ 48
10.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation................. 48
10.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped................................... 48
10.2.18 Symptom: Hot air can be felt when the indoor unit is stopped ................................................................... 48
11 Relocation 49
12 Disposal 50
13 Technical data 51
13.1 Eco Design requirements ............................................................................................................................................... 51
For the installer 52
14 About the box 53
14.1 To unpack the outdoor unit ........................................................................................................................................... 53
14.2 To handle the outdoor unit............................................................................................................................................ 54
14.3 To remove the accessories from the outdoor unit........................................................................................................ 55
14.4 To remove the transportation stay................................................................................................................................ 55
15 About the units and options 57
15.1 Identification label: Outdoor unit .................................................................................................................................. 57
15.2 About the outdoor unit .................................................................................................................................................. 57
15.3 System layout ................................................................................................................................................................. 58
15.4 Combining units and options ......................................................................................................................................... 58
15.4.1 About combining units and options .............................................................................................................. 59
15.4.2 Possible combinations of indoor units .......................................................................................................... 59
15.4.3 Possible options for the outdoor unit ........................................................................................................... 59
16 Special requirements for R32 units 61
16.1 Installation space requirements .................................................................................................................................... 61
16.2 System layout requirements .......................................................................................................................................... 61
16.3 To determine the required safety measures................................................................................................................. 63
16.3.1 Overview: flowchart....................................................................................................................................... 67
16.4 Safety measures ............................................................................................................................................................. 67
16.4.1 No safety measure......................................................................................................................................... 67
16.4.2 Alarm.............................................................................................................................................................. 68
16.4.3 Natural ventilation......................................................................................................................................... 70
16.4.4 Shut-off valves ............................................................................................................................................... 72
16.4.5 Overview: flowchart....................................................................................................................................... 76
16.5 Combinations of safety measures.................................................................................................................................. 77
17 Unit installation 78
17.1 Preparing the installation site ........................................................................................................................................ 78
17.1.1 Installation site requirements of the outdoor unit ....................................................................................... 79
17.1.2 Additional installation site requirements of the outdoor unit in cold climates ........................................... 82
17.2 Opening and closing the unit ......................................................................................................................................... 83
17.2.1 About opening the units................................................................................................................................ 83
17.2.2 To open the outdoor unit .............................................................................................................................. 83
17.2.3 To close the outdoor unit .............................................................................................................................. 84
17.3 Mounting the outdoor unit............................................................................................................................................ 84
17.3.1 To provide the installation structure............................................................................................................. 84
17.3.2 To install the outdoor unit............................................................................................................................. 85
17.3.3 To provide drainage....................................................................................................................................... 85
17.3.4 To prevent the outdoor unit from falling over.............................................................................................. 86
18 Piping installation 87
18.1 Preparing refrigerant piping........................................................................................................................................... 87
18.1.1 Refrigerant piping requirements................................................................................................................... 87
18.1.2 Refrigerant piping material............................................................................................................................ 87
18.1.3 Refrigerant piping insulation ......................................................................................................................... 88
18.1.4 To select the piping size................................................................................................................................. 88
18.1.5 To select refrigerant branch kits ................................................................................................................... 90
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