Table of contents
Installer reference guide
3
ERLA11~16D + EBBH/X11+16D
Daikin Altherma 3 R W
4P643603-1B – 2022.05
7.2 Opening and closing the units ........................................................................................................................................ 80
7.2.1 About opening the units................................................................................................................................. 80
7.2.2 To open the outdoor unit............................................................................................................................... 80
7.2.3 To close the outdoor unit............................................................................................................................... 81
7.2.4 To open the indoor unit ................................................................................................................................. 81
7.2.5 To close the indoor unit ................................................................................................................................. 83
7.3 Mounting the outdoor unit............................................................................................................................................. 83
7.3.1 About mounting the outdoor unit ................................................................................................................. 83
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 83
7.3.3 To provide the installation structure ............................................................................................................. 84
7.3.4 To install the outdoor unit ............................................................................................................................. 84
7.3.5 To provide drainage........................................................................................................................................ 85
7.3.6 To install the discharge grille.......................................................................................................................... 86
7.4 Mounting the indoor unit ............................................................................................................................................... 87
7.4.1 About mounting the indoor unit.................................................................................................................... 87
7.4.2 Precautions when mounting the indoor unit................................................................................................. 87
7.4.3 To install the indoor unit ................................................................................................................................ 87
7.4.4 To connect the drain hose to the drain ......................................................................................................... 89
8 Piping installation 90
8.1 Preparing refrigerant piping ........................................................................................................................................... 90
8.1.1 Refrigerant piping requirements.................................................................................................................... 90
8.1.2 Refrigerant piping insulation.......................................................................................................................... 91
8.2 Connecting the refrigerant piping .................................................................................................................................. 91
8.2.1 About connecting the refrigerant piping ....................................................................................................... 91
8.2.2 Precautions when connecting the refrigerant piping.................................................................................... 92
8.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 93
8.2.4 Pipe bending guidelines ................................................................................................................................. 93
8.2.5 To flare the pipe end ...................................................................................................................................... 93
8.2.6 To braze the pipe end..................................................................................................................................... 94
8.2.7 Using the stop valve and service port............................................................................................................ 95
8.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 96
8.2.9 To connect the refrigerant piping to the indoor unit .................................................................................... 99
8.3 Checking the refrigerant piping...................................................................................................................................... 99
8.3.1 About checking the refrigerant piping........................................................................................................... 99
8.3.2 Precautions when checking the refrigerant piping........................................................................................ 100
8.3.3 Checking refrigerant piping: Setup ................................................................................................................ 100
8.3.4 To check for leaks ........................................................................................................................................... 100
8.3.5 To perform vacuum drying............................................................................................................................. 101
8.4 Charging refrigerant........................................................................................................................................................ 102
8.4.1 About charging refrigerant............................................................................................................................. 102
8.4.2 Precautions when charging refrigerant ......................................................................................................... 103
8.4.3 Charging additional refrigerant...................................................................................................................... 104
8.4.4 Completely recharging refrigerant................................................................................................................. 104
8.4.5 To fix the fluorinated greenhouse gases label............................................................................................... 105
8.5 Preparing water piping ................................................................................................................................................... 106
8.5.1 Water circuit requirements............................................................................................................................ 106
8.5.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 109
8.5.3 To check the water volume and flow rate ..................................................................................................... 109
8.5.4 Changing the pre-pressure of the expansion vessel...................................................................................... 111
8.5.5 To check the water volume: Examples .......................................................................................................... 112
8.6 Connecting water piping................................................................................................................................................. 112
8.6.1 About connecting the water piping ............................................................................................................... 112
8.6.2 Precautions when connecting the water piping............................................................................................ 113
8.6.3 To connect the water piping .......................................................................................................................... 113
8.6.4 To fill the water circuit ................................................................................................................................... 114
8.6.5 To fill the domestic hot water tank................................................................................................................ 115
8.6.6 To insulate the water piping .......................................................................................................................... 115
9 Electrical installation 116
9.1 About connecting the electrical wiring .......................................................................................................................... 116
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 116
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 117
9.1.3 About electrical compliance........................................................................................................................... 118
9.1.4 About preferential kWh rate power supply................................................................................................... 119
9.1.5 Overview of electrical connections except external actuators ..................................................................... 120
9.2 Connections to the outdoor unit.................................................................................................................................... 120
9.2.1 Specifications of standard wiring components.............................................................................................. 121
9.2.2 To connect the electrical wiring to the outdoor unit .................................................................................... 121
9.3 Connections to the indoor unit ...................................................................................................................................... 123
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