Table of contents
Installer and user reference guide
2
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
Table of contents
1 About this document 5
1.1 Meaning of warnings and symbols................................................................................................................................. 5
2 General safety precautions 7
2.1 For the installer............................................................................................................................................................... 7
2.1.1 General ........................................................................................................................................................... 7
2.1.2 Installation site ............................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 8
2.1.4 Electrical ......................................................................................................................................................... 10
3 Specific installer safety instructions 13
3.1 Instructions for equipment using R32 refrigerant ......................................................................................................... 17
For the user 19
4 User safety instructions 20
4.1 General............................................................................................................................................................................ 20
4.2 Instructions for safe operation ....................................................................................................................................... 21
5 About the system 25
5.1 System layout.................................................................................................................................................................. 25
6 Before operation 27
7 Maintenance and service 28
7.1 Precautions for maintenance and service...................................................................................................................... 28
7.2 About the refrigerant...................................................................................................................................................... 28
7.2.1 About the refrigerant leakage sensor ............................................................................................................ 29
8 Troubleshooting 30
8.1 Symptoms that are NOT system malfunctions............................................................................................................... 30
8.1.1 Symptom: noise.............................................................................................................................................. 31
9 Relocation 32
10 Disposal 33
For the installer 34
11 About the box 35
11.1 To handle the unit........................................................................................................................................................... 35
11.2 To unpack the unit .......................................................................................................................................................... 36
11.3 To remove the accessories ............................................................................................................................................. 39
12 About the unit and options 41
12.1 Identification ................................................................................................................................................................... 41
12.1.1 Identification label: SV unit ............................................................................................................................ 41
12.2 About the operation range ............................................................................................................................................. 41
12.3 System layout.................................................................................................................................................................. 41
12.4 Combining units and options.......................................................................................................................................... 42
12.4.1 Possible options for the SV unit ..................................................................................................................... 42
13 Special requirements for R32 units 44
13.1 Installation space requirements ..................................................................................................................................... 44
13.2 System layout requirements........................................................................................................................................... 44
13.3 To determine the required safety measures ................................................................................................................. 45
13.3.1 Overview: flowchart ....................................................................................................................................... 48
13.4 Safety measures.............................................................................................................................................................. 49
13.4.1 No safety measure.......................................................................................................................................... 49
13.4.2 External alarm................................................................................................................................................. 49
13.4.3 Natural ventilation.......................................................................................................................................... 50
13.4.4 Ventilated enclosure ...................................................................................................................................... 52
13.4.5 Overview: flowchart ....................................................................................................................................... 59
13.5 Combinations of ventilated enclosure configurations ................................................................................................... 60
13.6 Combinations of safety measures .................................................................................................................................. 61
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