Table of contents
Installer reference guide
3
EPRA08~12EAV3+W1 + ETVH12SU18+23EA6V
Daikin Altherma 3 H MT F
4P644482-1 – 2021.03
7.1.1 Installation site requirements of the outdoor unit........................................................................................ 64
7.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 66
7.1.3 Installation site requirements of the indoor unit .......................................................................................... 66
7.2 Opening and closing the units ........................................................................................................................................ 68
7.2.1 About opening the units................................................................................................................................. 68
7.2.2 To open the outdoor unit............................................................................................................................... 68
7.2.3 To remove the transportation stay................................................................................................................ 68
7.2.4 To close the outdoor unit............................................................................................................................... 69
7.2.5 To open the indoor unit ................................................................................................................................. 69
7.2.6 To lower the switch box on the indoor unit .................................................................................................. 71
7.2.7 To close the indoor unit ................................................................................................................................. 72
7.3 Mounting the outdoor unit............................................................................................................................................. 72
7.3.1 About mounting the outdoor unit ................................................................................................................. 72
7.3.2 Precautions when mounting the outdoor unit.............................................................................................. 73
7.3.3 To provide the installation structure ............................................................................................................. 73
7.3.4 To install the outdoor unit ............................................................................................................................. 74
7.3.5 To provide drainage........................................................................................................................................ 75
7.3.6 To install the discharge grille.......................................................................................................................... 76
7.3.7 To remove the discharge grille, and put the grille in safety position............................................................ 78
7.4 Mounting the indoor unit ............................................................................................................................................... 80
7.4.1 About mounting the indoor unit.................................................................................................................... 80
7.4.2 Precautions when mounting the indoor unit................................................................................................. 80
7.4.3 To install the indoor unit ................................................................................................................................ 80
7.4.4 To connect the drain hose to the drain ......................................................................................................... 81
8 Piping installation 82
8.1 Preparing water piping ................................................................................................................................................... 82
8.1.1 Water circuit requirements............................................................................................................................ 82
8.1.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 86
8.1.3 To check the water volume and flow rate ..................................................................................................... 86
8.1.4 Changing the pre-pressure of the expansion vessel...................................................................................... 88
8.1.5 To check the water volume: Examples .......................................................................................................... 89
8.2 Connecting water piping................................................................................................................................................. 89
8.2.1 About connecting the water piping ............................................................................................................... 89
8.2.2 Precautions when connecting the water piping............................................................................................ 90
8.2.3 To connect the water piping .......................................................................................................................... 90
8.2.4 To connect the water piping for domestic hot water.................................................................................... 93
8.2.5 To connect the recirculation piping ............................................................................................................... 96
8.2.6 To fill the water circuit ................................................................................................................................... 96
8.2.7 To protect the water circuit against freezing ................................................................................................ 96
8.2.8 To fill the domestic hot water tank................................................................................................................ 100
8.2.9 To insulate the water piping .......................................................................................................................... 100
9 Electrical installation 101
9.1 About connecting the electrical wiring .......................................................................................................................... 101
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 101
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 102
9.1.3 About electrical compliance........................................................................................................................... 104
9.1.4 Specifications of standard wiring components.............................................................................................. 104
9.1.5 About preferential kWh rate power supply................................................................................................... 104
9.1.6 Overview of electrical connections except external actuators ..................................................................... 105
9.2 Connections to the outdoor unit.................................................................................................................................... 105
9.2.1 To connect the electrical wiring to the outdoor unit .................................................................................... 106
9.2.2 To reposition the air thermistor on the outdoor unit ................................................................................... 112
9.3 Connections to the indoor unit ...................................................................................................................................... 113
9.3.1 To connect the main power supply................................................................................................................ 116
9.3.2 To connect the backup heater power supply ................................................................................................ 118
9.3.3 To connect the shut-off valve ........................................................................................................................ 121
9.3.4 To connect the electricity meters .................................................................................................................. 122
9.3.5 To connect the domestic hot water pump .................................................................................................... 123
9.3.6 To connect the alarm output ......................................................................................................................... 124
9.3.7 To connect the space cooling/heating ON/OFF output................................................................................. 125
9.3.8 To connect the changeover to external heat source..................................................................................... 126
9.3.9 To connect the power consumption digital inputs........................................................................................ 127
9.3.10 To connect the safety thermostat (normally closed contact) ....................................................................... 128
9.3.11 To connect a Smart Grid................................................................................................................................. 129
9.3.12 To connect the WLAN cartridge (delivered as accessory)............................................................................. 133
9.4 After connecting the electrical wiring to the indoor unit .............................................................................................. 133
10 Configuration 134
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