Table of contents
Installer reference guide
3
ERGA04~08E + EHVH04+08SU18+23E
Daikin Altherma 3 R F
4P629090-1C – 2022.08
7.1.5 Installation patterns ....................................................................................................................................... 66
7.2 Opening and closing the units ........................................................................................................................................ 70
7.2.1 About opening the units................................................................................................................................. 70
7.2.2 To open the outdoor unit............................................................................................................................... 70
7.2.3 To close the outdoor unit............................................................................................................................... 71
7.2.4 To open the indoor unit ................................................................................................................................. 71
7.2.5 To lower the switch box on the indoor unit .................................................................................................. 73
7.2.6 To close the indoor unit ................................................................................................................................. 74
7.3 Mounting the outdoor unit............................................................................................................................................. 74
7.3.1 About mounting the outdoor unit ................................................................................................................. 74
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 74
7.3.3 To provide the installation structure ............................................................................................................. 74
7.3.4 To install the outdoor unit ............................................................................................................................. 77
7.3.5 To provide drainage........................................................................................................................................ 78
7.3.6 To prevent the outdoor unit from falling over .............................................................................................. 80
7.4 Mounting the indoor unit ............................................................................................................................................... 81
7.4.1 About mounting the indoor unit.................................................................................................................... 81
7.4.2 Precautions when mounting the indoor unit................................................................................................. 81
7.4.3 To install the indoor unit ................................................................................................................................ 81
7.4.4 To connect the drain hose to the drain ......................................................................................................... 82
8 Piping installation 83
8.1 Preparing refrigerant piping ........................................................................................................................................... 83
8.1.1 Refrigerant piping requirements.................................................................................................................... 83
8.1.2 Refrigerant piping insulation.......................................................................................................................... 84
8.2 Connecting the refrigerant piping .................................................................................................................................. 84
8.2.1 About connecting the refrigerant piping ....................................................................................................... 84
8.2.2 Precautions when connecting the refrigerant piping.................................................................................... 85
8.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 86
8.2.4 Pipe bending guidelines ................................................................................................................................. 86
8.2.5 To flare the pipe end ...................................................................................................................................... 86
8.2.6 To braze the pipe end..................................................................................................................................... 87
8.2.7 Using the stop valve and service port............................................................................................................ 88
8.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 89
8.2.9 To connect the refrigerant piping to the indoor unit .................................................................................... 90
8.3 Checking the refrigerant piping...................................................................................................................................... 90
8.3.1 About checking the refrigerant piping........................................................................................................... 90
8.3.2 Precautions when checking the refrigerant piping........................................................................................ 91
8.3.3 To check for leaks ........................................................................................................................................... 91
8.3.4 To perform vacuum drying............................................................................................................................. 92
8.3.5 To insulate the refrigerant piping .................................................................................................................. 93
8.4 Charging refrigerant........................................................................................................................................................ 93
8.4.1 About charging refrigerant............................................................................................................................. 93
8.4.2 Precautions when charging refrigerant ......................................................................................................... 94
8.4.3 To determine the additional refrigerant amount.......................................................................................... 94
8.4.4 To determine the complete recharge amount.............................................................................................. 95
8.4.5 To charge additional refrigerant .................................................................................................................... 95
8.4.6 To fix the fluorinated greenhouse gases label............................................................................................... 95
8.5 Preparing water piping ................................................................................................................................................... 96
8.5.1 Water circuit requirements............................................................................................................................ 96
8.5.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 100
8.5.3 To check the water volume and flow rate ..................................................................................................... 100
8.5.4 Changing the pre-pressure of the expansion vessel...................................................................................... 102
8.5.5 To check the water volume: Examples .......................................................................................................... 103
8.6 Connecting water piping................................................................................................................................................. 103
8.6.1 About connecting the water piping ............................................................................................................... 103
8.6.2 Precautions when connecting the water piping............................................................................................ 104
8.6.3 To connect the water piping .......................................................................................................................... 104
8.6.4 To connect the water piping for domestic hot water.................................................................................... 106
8.6.5 To connect the recirculation piping ............................................................................................................... 109
8.6.6 To fill the water circuit ................................................................................................................................... 109
8.6.7 To fill the domestic hot water tank................................................................................................................ 109
8.6.8 To insulate the water piping .......................................................................................................................... 110
9 Electrical installation 111
9.1 About connecting the electrical wiring .......................................................................................................................... 111
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 112
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 112
9.1.3 Specifications of standard wiring components.............................................................................................. 114
9.1.4 About electrical compliance........................................................................................................................... 114
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