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Installer and user reference guide
4
18.1.4
To select the piping size ................................................................................................................................. 91
18.1.5
To select refrigerant branch kits .................................................................................................................... 93
18.1.6
Installation limitations.................................................................................................................................... 94
18.1.7
About the piping length.................................................................................................................................. 96
18.1.8
Single and multi-outdoor-unit combinations................................................................................................. 98
18.1.9
Multiple outdoor units: Possible layouts ....................................................................................................... 100
18.2
Connecting the refrigerant piping .................................................................................................................................. 102
18.2.1
About connecting the refrigerant piping ....................................................................................................... 102
18.2.2
Precautions when connecting the refrigerant piping.................................................................................... 102
18.2.3
Multiple outdoor units: Knockout holes ........................................................................................................ 103
18.2.4
Using the stop valve and service port............................................................................................................ 103
18.2.5
To route the refrigerant piping ...................................................................................................................... 105
18.2.6
To protect against contamination.................................................................................................................. 106
18.2.7
To remove the pinched pipes......................................................................................................................... 107
18.2.8
To braze the pipe end..................................................................................................................................... 108
18.2.9
To connect the refrigerant piping to the outdoor unit ................................................................................. 108
18.2.10 To connect the multi connection piping kit ................................................................................................... 109
18.2.11 To connect the refrigerant branching kit....................................................................................................... 110
18.3
Checking the refrigerant piping...................................................................................................................................... 110
18.3.1
About checking the refrigerant piping ........................................................................................................... 110
18.3.2
Checking refrigerant piping: General guidelines ........................................................................................... 111
18.3.3
Checking refrigerant piping: Setup ................................................................................................................ 112
18.3.4
To perform a leak test .................................................................................................................................... 112
18.3.5
To perform vacuum drying............................................................................................................................. 113
18.3.6
To insulate the refrigerant piping .................................................................................................................. 114
18.3.7
To check for leaks after charging refrigerant................................................................................................. 115
19.1
Precautions when charging refrigerant.......................................................................................................................... 116
19.2
About charging refrigerant ............................................................................................................................................. 117
19.3
To determine the additional refrigerant amount .......................................................................................................... 117
19.4
To charge refrigerant: Flow chart................................................................................................................................... 120
19.5
To charge refrigerant ...................................................................................................................................................... 120
19.6
Error codes when charging refrigerant .......................................................................................................................... 123
19.7
Checks after charging refrigerant................................................................................................................................... 123
19.8
To fix the fluorinated greenhouse gases label ............................................................................................................... 123
19.9
To check refrigerant piping joints for leaks after charging refrigerant ......................................................................... 124
20.1
About connecting the electrical wiring .......................................................................................................................... 125
20.1.1
Precautions when connecting the electrical wiring....................................................................................... 125
20.1.2
About the electrical wiring ............................................................................................................................. 127
20.1.3
Guidelines when knocking out knockout holes ............................................................................................. 128
20.1.4
Guidelines when connecting the electrical wiring......................................................................................... 129
20.1.5
About electrical compliance........................................................................................................................... 131
20.1.6
Specifications of standard wiring components.............................................................................................. 132
20.2
To route and fix the interconnection wiring .................................................................................................................. 134
20.3
To connect the interconnection wiring .......................................................................................................................... 135
20.4
To finish the interconnection wiring .............................................................................................................................. 136
20.5
To route and fix the power supply ................................................................................................................................. 136
20.6
To connect the power supply ......................................................................................................................................... 137
20.7
To connect the external outputs .................................................................................................................................... 138
20.8
To check the insulation resistance of the compressor .................................................................................................. 139
21.1
Making field settings....................................................................................................................................................... 141
21.1.1
About making field settings............................................................................................................................ 141
21.1.2
Field setting components............................................................................................................................... 142
21.1.3
To access the field setting components......................................................................................................... 143
21.1.4
To access mode 1 or 2.................................................................................................................................... 143
21.1.5
To use mode 1 ................................................................................................................................................ 144
21.1.6
To use mode 2 ................................................................................................................................................ 145
21.1.7
Mode 1: monitoring settings.......................................................................................................................... 146
21.1.8
Mode 2: field settings..................................................................................................................................... 148
21.1.9
Indoor unit field setting.................................................................................................................................. 155
21.2
Energy saving and optimum operation .......................................................................................................................... 156
21.2.1
Available main operation methods................................................................................................................ 156
21.2.2
Available comfort settings.............................................................................................................................. 157
21.2.3
Example: Automatic mode during cooling..................................................................................................... 159
21.2.4
Example: Automatic mode during heating .................................................................................................... 160
116
125
141
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 - 2023.12
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