Table of contents
Installer and user reference guide
4
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
18.2.4 To route the refrigerant piping ...................................................................................................................... 82
18.2.5 To connect the refrigerant piping to the outdoor unit ................................................................................. 83
18.2.6 To connect the multi connection piping kit................................................................................................... 84
18.2.7 To connect the refrigerant branching kit....................................................................................................... 84
18.2.8 To protect against contamination.................................................................................................................. 85
18.2.9 To braze the pipe end..................................................................................................................................... 86
18.2.10 Using the stop valve and service port............................................................................................................ 86
18.2.11 To remove the spun pipes.............................................................................................................................. 89
18.3 Checking the refrigerant piping ...................................................................................................................................... 90
18.3.1 About checking the refrigerant piping........................................................................................................... 90
18.3.2 Checking refrigerant piping: General guidelines ........................................................................................... 91
18.3.3 Checking refrigerant piping: Setup ................................................................................................................ 92
18.3.4 To perform a leak test .................................................................................................................................... 92
18.3.5 To perform vacuum drying............................................................................................................................. 93
18.3.6 To insulate the refrigerant piping .................................................................................................................. 93
18.4 Charging refrigerant........................................................................................................................................................ 94
18.4.1 Precautions when charging refrigerant ......................................................................................................... 94
18.4.2 About charging refrigerant............................................................................................................................. 95
18.4.3 To determine the additional refrigerant amount.......................................................................................... 95
18.4.4 To charge refrigerant: Flow chart .................................................................................................................. 97
18.4.5 To charge refrigerant...................................................................................................................................... 98
18.4.6 Step 6: To manually charge refrigerant ......................................................................................................... 100
18.4.7 Checks after charging refrigerant .................................................................................................................. 100
18.4.8 To fix the fluorinated greenhouse gases label............................................................................................... 101
19 Electrical installation 102
19.1 About connecting the electrical wiring .......................................................................................................................... 102
19.1.1 Precautions when connecting the electrical wiring....................................................................................... 102
19.1.2 Field wiring: Overview .................................................................................................................................... 104
19.1.3 About the electrical wiring ............................................................................................................................. 104
19.1.4 Guidelines when knocking out knockout holes ............................................................................................. 105
19.1.5 About electrical compliance........................................................................................................................... 106
19.1.6 Safety device requirements ........................................................................................................................... 106
19.2 To route and fix the transmission wiring........................................................................................................................ 108
19.3 To connect the transmission wiring ............................................................................................................................... 108
19.4 To finish the transmission wiring.................................................................................................................................... 109
19.5 To route and fix the power supply ................................................................................................................................. 110
19.6 To connect the power supply ......................................................................................................................................... 110
19.7 To check the insulation resistance of the compressor .................................................................................................. 112
20 Configuration 113
20.1 Overview: Configuration................................................................................................................................................. 113
20.2 Making field settings....................................................................................................................................................... 113
20.2.1 About making field settings............................................................................................................................ 113
20.2.2 Field setting components............................................................................................................................... 115
20.2.3 To access the field setting components......................................................................................................... 115
20.2.4 To access mode 1 or 2.................................................................................................................................... 116
20.2.5 To use mode 1 ................................................................................................................................................ 117
20.2.6 To use mode 2 ................................................................................................................................................ 117
20.2.7 Mode 1: Monitoring settings ......................................................................................................................... 118
20.2.8 Mode 2: Field settings .................................................................................................................................... 120
20.2.9 To connect the PC configurator to the outdoor unit..................................................................................... 126
20.3 Energy saving and optimum operation .......................................................................................................................... 126
20.3.1 Available main operation methods................................................................................................................ 127
20.3.2 Available comfort settings.............................................................................................................................. 128
20.3.3 Example: Automatic mode during cooling..................................................................................................... 130
20.3.4 Example: Automatic mode during heating .................................................................................................... 131
21 Commissioning 133
21.1 Overview: Commissioning .............................................................................................................................................. 133
21.2 Precautions when commissioning .................................................................................................................................. 133
21.3 Checklist before commissioning ..................................................................................................................................... 134
21.4 About the test run........................................................................................................................................................... 135
21.5 To perform a test run...................................................................................................................................................... 136
21.6 Correcting after abnormal completion of the test run .................................................................................................. 137
21.7 Operating the unit........................................................................................................................................................... 137
22 Hand-over to the user 138
23 Maintenance and service 139
23.1 Maintenance safety precautions .................................................................................................................................... 139
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