Table of contents
Installer reference guide
3
ERLA11~16D + EBVH16SU23D
Daikin Altherma 3 R F
4P655196-1A – 2022.05
7.1.4 Special requirements for R32 units................................................................................................................ 68
7.1.5 Installation patterns ....................................................................................................................................... 70
7.2 Opening and closing the units ........................................................................................................................................ 78
7.2.1 About opening the units................................................................................................................................. 78
7.2.2 To open the outdoor unit............................................................................................................................... 78
7.2.3 To close the outdoor unit............................................................................................................................... 79
7.2.4 To open the indoor unit ................................................................................................................................. 79
7.2.5 To lower the switch box on the indoor unit .................................................................................................. 81
7.2.6 To close the indoor unit ................................................................................................................................. 82
7.3 Mounting the outdoor unit............................................................................................................................................. 82
7.3.1 About mounting the outdoor unit ................................................................................................................. 82
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 82
7.3.3 To provide the installation structure ............................................................................................................. 82
7.3.4 To install the outdoor unit ............................................................................................................................. 83
7.3.5 To provide drainage........................................................................................................................................ 84
7.3.6 To install the discharge grille.......................................................................................................................... 85
7.4 Mounting the indoor unit ............................................................................................................................................... 86
7.4.1 About mounting the indoor unit.................................................................................................................... 86
7.4.2 Precautions when mounting the indoor unit................................................................................................. 86
7.4.3 To install the indoor unit ................................................................................................................................ 86
7.4.4 To connect the drain hose to the drain ......................................................................................................... 87
8 Piping installation 88
8.1 Preparing refrigerant piping ........................................................................................................................................... 88
8.1.1 Refrigerant piping requirements.................................................................................................................... 88
8.1.2 Refrigerant piping insulation.......................................................................................................................... 89
8.2 Connecting the refrigerant piping .................................................................................................................................. 89
8.2.1 About connecting the refrigerant piping ....................................................................................................... 89
8.2.2 Precautions when connecting the refrigerant piping.................................................................................... 90
8.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 91
8.2.4 Pipe bending guidelines ................................................................................................................................. 91
8.2.5 To flare the pipe end ...................................................................................................................................... 91
8.2.6 To braze the pipe end..................................................................................................................................... 92
8.2.7 Using the stop valve and service port............................................................................................................ 93
8.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 94
8.2.9 To connect the refrigerant piping to the indoor unit .................................................................................... 97
8.3 Checking the refrigerant piping...................................................................................................................................... 97
8.3.1 About checking the refrigerant piping........................................................................................................... 97
8.3.2 Precautions when checking the refrigerant piping........................................................................................ 98
8.3.3 Checking refrigerant piping: Setup ................................................................................................................ 98
8.3.4 To check for leaks ........................................................................................................................................... 98
8.3.5 To perform vacuum drying............................................................................................................................. 99
8.4 Charging refrigerant........................................................................................................................................................ 100
8.4.1 About charging refrigerant............................................................................................................................. 100
8.4.2 Precautions when charging refrigerant ......................................................................................................... 101
8.4.3 Charging additional refrigerant...................................................................................................................... 102
8.4.4 Completely recharging refrigerant................................................................................................................. 102
8.4.5 To fix the fluorinated greenhouse gases label............................................................................................... 103
8.5 Preparing water piping ................................................................................................................................................... 104
8.5.1 Water circuit requirements............................................................................................................................ 104
8.5.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 108
8.5.3 To check the water volume and flow rate ..................................................................................................... 108
8.5.4 Changing the pre-pressure of the expansion vessel...................................................................................... 110
8.5.5 To check the water volume: Examples .......................................................................................................... 111
8.6 Connecting water piping................................................................................................................................................. 111
8.6.1 About connecting the water piping ............................................................................................................... 111
8.6.2 Precautions when connecting the water piping............................................................................................ 112
8.6.3 To connect the water piping .......................................................................................................................... 112
8.6.4 To connect the water piping for domestic hot water.................................................................................... 114
8.6.5 To connect the recirculation piping ............................................................................................................... 117
8.6.6 To fill the water circuit ................................................................................................................................... 118
8.6.7 To fill the domestic hot water tank................................................................................................................ 118
8.6.8 To insulate the water piping .......................................................................................................................... 118
9 Electrical installation 119
9.1 About connecting the electrical wiring .......................................................................................................................... 119
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 120
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 121
9.1.3 About electrical compliance........................................................................................................................... 122
9.1.4 About preferential kWh rate power supply................................................................................................... 122
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