Table of contents
Installer reference guide
3
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
6.2.3 Installation site requirements of the indoor unit .......................................................................................... 52
6.3 Preparing refrigerant piping ........................................................................................................................................... 56
6.3.1 Refrigerant piping requirements.................................................................................................................... 56
6.3.2 Refrigerant piping insulation.......................................................................................................................... 56
6.4 Preparing water piping ................................................................................................................................................... 56
6.4.1 Water circuit requirements............................................................................................................................ 57
6.4.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 59
6.4.3 To check the water volume and flow rate ..................................................................................................... 59
6.4.4 Changing the pre-pressure of the expansion vessel...................................................................................... 61
6.4.5 To check the water volume: Examples .......................................................................................................... 62
6.5 Preparing electrical wiring .............................................................................................................................................. 63
6.5.1 About preparing electrical wiring................................................................................................................... 63
6.5.2 About preferential kWh rate power supply................................................................................................... 63
6.5.3 Overview of electrical connections except external actuators ..................................................................... 64
6.5.4 Overview of electrical connections for external and internal actuators....................................................... 65
7 Installation 67
7.1 Overview: Installation ..................................................................................................................................................... 67
7.2 Opening the units ........................................................................................................................................................... 67
7.2.1 About opening the units................................................................................................................................. 67
7.2.2 To open the outdoor unit............................................................................................................................... 67
7.2.3 To open the indoor unit ................................................................................................................................. 68
7.3 Mounting the outdoor unit............................................................................................................................................. 70
7.3.1 About mounting the outdoor unit ................................................................................................................. 70
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 70
7.3.3 To provide the installation structure ............................................................................................................. 70
7.3.4 To install the outdoor unit ............................................................................................................................. 73
7.3.5 To provide drainage........................................................................................................................................ 74
7.3.6 To prevent the outdoor unit from falling over .............................................................................................. 75
7.4 Mounting the indoor unit ............................................................................................................................................... 76
7.4.1 About mounting the indoor unit.................................................................................................................... 76
7.4.2 Precautions when mounting the indoor unit................................................................................................. 76
7.4.3 To install the indoor unit ................................................................................................................................ 76
7.4.4 To connect the drain hose to the drain ......................................................................................................... 78
7.5 Connecting the refrigerant piping .................................................................................................................................. 78
7.5.1 About connecting the refrigerant piping ....................................................................................................... 78
7.5.2 Precautions when connecting the refrigerant piping.................................................................................... 79
7.5.3 Guidelines when connecting the refrigerant piping...................................................................................... 80
7.5.4 Pipe bending guidelines ................................................................................................................................. 80
7.5.5 To flare the pipe end ...................................................................................................................................... 80
7.5.6 To braze the pipe end..................................................................................................................................... 81
7.5.7 Using the stop valve and service port............................................................................................................ 82
7.5.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 83
7.5.9 To connect the refrigerant piping to the indoor unit .................................................................................... 84
7.6 Checking the refrigerant piping...................................................................................................................................... 84
7.6.1 About checking the refrigerant piping........................................................................................................... 84
7.6.2 Precautions when checking the refrigerant piping........................................................................................ 85
7.6.3 To check for leaks ........................................................................................................................................... 85
7.6.4 To perform vacuum drying............................................................................................................................. 85
7.7 Charging refrigerant........................................................................................................................................................ 86
7.7.1 About charging refrigerant............................................................................................................................. 86
7.7.2 Precautions when charging refrigerant ......................................................................................................... 87
7.7.3 To determine the additional refrigerant amount.......................................................................................... 88
7.7.4 To determine the complete recharge amount.............................................................................................. 88
7.7.5 To charge additional refrigerant .................................................................................................................... 88
7.7.6 To fix the fluorinated greenhouse gases label............................................................................................... 88
7.8 Connecting water piping................................................................................................................................................. 89
7.8.1 About connecting the water piping ............................................................................................................... 89
7.8.2 Precautions when connecting the water piping............................................................................................ 89
7.8.3 To connect the water piping .......................................................................................................................... 90
7.8.4 To fill the water circuit ................................................................................................................................... 91
7.8.5 To fill the domestic hot water tank................................................................................................................ 91
7.8.6 To insulate the water piping .......................................................................................................................... 91
7.9 Connecting the electrical wiring..................................................................................................................................... 92
7.9.1 About connecting the electrical wiring.......................................................................................................... 92
7.9.2 About electrical compliance........................................................................................................................... 92
7.9.3 Precautions when connecting the electrical wiring....................................................................................... 92
7.9.4 Guidelines when connecting the electrical wiring......................................................................................... 93
7.9.5 Specifications of standard wiring components.............................................................................................. 94
7.9.6 To connect the electrical wiring to the outdoor unit .................................................................................... 94
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