Table of Contents
Installer and user reference guide
4
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
16.2.3 Pipe bending guidelines ................................................................................................................................. 72
16.2.4 To braze the pipe end..................................................................................................................................... 72
16.2.5 Using the stop valve and service port............................................................................................................ 72
16.2.6 To remove the pinched pipes......................................................................................................................... 73
16.2.7 To connect the refrigerant piping to the compressor unit............................................................................ 75
16.2.8 To connect the refrigerant piping to the heat exchanger unit...................................................................... 76
16.2.9 To connect the refrigerant branching kit....................................................................................................... 78
16.3 Checking the refrigerant piping ...................................................................................................................................... 78
16.3.1 About checking the refrigerant piping........................................................................................................... 78
16.3.2 Checking refrigerant piping: General guidelines ........................................................................................... 79
16.3.3 Checking refrigerant piping: Setup ................................................................................................................ 79
16.3.4 To perform a leak test .................................................................................................................................... 80
16.3.5 To perform vacuum drying............................................................................................................................. 81
16.3.6 To insulate the refrigerant piping .................................................................................................................. 81
16.4 Charging refrigerant........................................................................................................................................................ 82
16.4.1 About charging refrigerant............................................................................................................................. 82
16.4.2 Precautions when charging refrigerant ......................................................................................................... 83
16.4.3 To determine the additional refrigerant amount.......................................................................................... 83
16.4.4 To charge refrigerant...................................................................................................................................... 84
16.4.5 Error codes when charging refrigerant.......................................................................................................... 87
16.4.6 To fix the fluorinated greenhouse gases label............................................................................................... 87
17 Electrical installation 88
17.1 About connecting the electrical wiring .......................................................................................................................... 88
17.1.1 Precautions when connecting the electrical wiring....................................................................................... 88
17.1.2 Field wiring: Overview .................................................................................................................................... 90
17.1.3 Guidelines when knocking out knockout holes ............................................................................................. 92
17.1.4 About electrical compliance........................................................................................................................... 92
17.1.5 Safety device requirements ........................................................................................................................... 92
17.2 To connect the electrical wiring on the compressor unit .............................................................................................. 93
17.3 To connect the electrical wiring on the heat exchanger unit ........................................................................................ 96
17.4 To close the compressor unit ......................................................................................................................................... 97
17.5 To close the heat exchanger unit ................................................................................................................................... 97
17.6 To check the insulation resistance of the compressor .................................................................................................. 98
18 Configuration 99
18.1 Overview: Configuration................................................................................................................................................. 99
18.2 Making field settings....................................................................................................................................................... 99
18.2.1 About making field settings............................................................................................................................ 99
18.2.2 To access the field setting components......................................................................................................... 100
18.2.3 Field setting components............................................................................................................................... 100
18.2.4 To access mode 1 or 2.................................................................................................................................... 102
18.2.5 To use mode 1 (and default situation)........................................................................................................... 103
18.2.6 To use mode 2 ................................................................................................................................................ 104
18.2.7 Mode 1 (and default situation): Monitoring settings .................................................................................... 105
18.2.8 Mode 2: Field settings .................................................................................................................................... 109
18.2.9 To connect the PC configurator to the compressor unit............................................................................... 113
18.3 Energy saving and optimum operation .......................................................................................................................... 113
19 Commissioning 114
19.1 Precautions when commissioning .................................................................................................................................. 114
19.2 Checklist before commissioning ..................................................................................................................................... 114
19.3 Checklist during commissioning ..................................................................................................................................... 116
19.3.1 About the test run .......................................................................................................................................... 116
19.3.2 To perform a test run (7-LEDs display) .......................................................................................................... 116
19.3.3 To perform a test run (7-segment display).................................................................................................... 117
19.3.4 Correcting after abnormal completion of the test run.................................................................................. 118
20 Hand-over to the user 120
21 Maintenance and service 121
21.1 Overview: Maintenance and service .............................................................................................................................. 121
21.2 Maintenance safety precautions .................................................................................................................................... 121
21.2.1 To prevent electrical hazards ......................................................................................................................... 121
21.3 Checklist for yearly maintenance of the heat exchanger unit ....................................................................................... 122
21.4 About service mode operation ....................................................................................................................................... 122
21.4.1 To use vacuum mode ..................................................................................................................................... 122
21.4.2 To recover refrigerant .................................................................................................................................... 123
22 Troubleshooting 124
22.1 Overview: Troubleshooting ............................................................................................................................................ 124
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