Table of contents
Installer and user reference guide
4
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
18.2.4 To route the refrigerant piping ...................................................................................................................... 84
18.2.5 To connect the refrigerant piping to the outdoor unit ................................................................................. 85
18.2.6 To connect the multi connection piping kit................................................................................................... 86
18.2.7 To connect the refrigerant branching kit....................................................................................................... 86
18.2.8 To protect against contamination.................................................................................................................. 87
18.2.9 To braze the pipe end..................................................................................................................................... 88
18.2.10 Using the stop valve and service port............................................................................................................ 88
18.2.11 To remove the spun pipes.............................................................................................................................. 91
18.3 Checking the refrigerant piping ...................................................................................................................................... 92
18.3.1 About checking the refrigerant piping........................................................................................................... 92
18.3.2 Checking refrigerant piping: General guidelines ........................................................................................... 93
18.3.3 Checking refrigerant piping: Setup ................................................................................................................ 94
18.3.4 To perform a leak test .................................................................................................................................... 94
18.3.5 To perform vacuum drying............................................................................................................................. 95
18.3.6 To insulate the refrigerant piping .................................................................................................................. 95
18.4 Charging refrigerant........................................................................................................................................................ 96
18.4.1 Precautions when charging refrigerant ......................................................................................................... 96
18.4.2 About charging refrigerant............................................................................................................................. 97
18.4.3 To determine the additional refrigerant amount.......................................................................................... 98
18.4.4 To charge refrigerant: Flow chart .................................................................................................................. 100
18.4.5 To charge refrigerant...................................................................................................................................... 102
18.4.6 Step 6a: To automatically charge refrigerant ................................................................................................ 104
18.4.7 Step 6b: To manually charge refrigerant ....................................................................................................... 106
18.4.8 Error codes when charging refrigerant.......................................................................................................... 107
18.4.9 Checks after charging refrigerant .................................................................................................................. 107
18.4.10 To fix the fluorinated greenhouse gases label............................................................................................... 108
19 Electrical installation 109
19.1 About connecting the electrical wiring .......................................................................................................................... 109
19.1.1 Precautions when connecting the electrical wiring....................................................................................... 109
19.1.2 Field wiring: Overview .................................................................................................................................... 111
19.1.3 About the electrical wiring ............................................................................................................................. 111
19.1.4 Guidelines when knocking out knockout holes ............................................................................................. 112
19.1.5 About electrical compliance........................................................................................................................... 113
19.1.6 Safety device requirements ........................................................................................................................... 114
19.2 To route and fix the transmission wiring........................................................................................................................ 116
19.3 To connect the transmission wiring ............................................................................................................................... 117
19.4 To finish the transmission wiring.................................................................................................................................... 118
19.5 To route and fix the power supply ................................................................................................................................. 118
19.6 To connect the power supply ......................................................................................................................................... 119
19.7 To check the insulation resistance of the compressor .................................................................................................. 120
20 Configuration 122
20.1 Overview: Configuration................................................................................................................................................. 122
20.2 Making field settings....................................................................................................................................................... 122
20.2.1 About making field settings............................................................................................................................ 122
20.2.2 Field setting components............................................................................................................................... 123
20.2.3 To access the field setting components......................................................................................................... 124
20.2.4 To access mode 1 or 2.................................................................................................................................... 124
20.2.5 To use mode 1 ................................................................................................................................................ 125
20.2.6 To use mode 2 ................................................................................................................................................ 126
20.2.7 Mode 1: Monitoring settings ......................................................................................................................... 127
20.2.8 Mode 2: Field settings .................................................................................................................................... 129
20.2.9 To connect the PC configurator to the outdoor unit..................................................................................... 137
20.3 Energy saving and optimum operation .......................................................................................................................... 137
20.3.1 Available main operation methods................................................................................................................ 137
20.3.2 Available comfort settings.............................................................................................................................. 138
20.3.3 Example: Automatic mode during cooling..................................................................................................... 141
20.3.4 Example: Automatic mode during heating .................................................................................................... 142
20.4 Using the leak detection function .................................................................................................................................. 143
20.4.1 About automatic leak detection .................................................................................................................... 143
20.4.2 To manually perform a leak detection........................................................................................................... 143
21 Commissioning 145
21.1 Overview: Commissioning .............................................................................................................................................. 145
21.2 Precautions when commissioning .................................................................................................................................. 145
21.3 Checklist before commissioning ..................................................................................................................................... 146
21.4 About the test run........................................................................................................................................................... 147
21.5 To perform a test run...................................................................................................................................................... 148
21.6 Correcting after abnormal completion of the test run .................................................................................................. 149
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