Daikin EPRA18DAV3 - Electrical Installation; Connecting Electrical Wiring; Electrical Wiring Precautions

8 | Electrical installation
Installer reference guide
87
EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1B – 2020.12
8 Electrical installation
In this chapter
8.1 About connecting the electrical wiring .................................................................................................................................. 87
8.1.1 Precautions when connecting the electrical wiring .............................................................................................. 87
8.1.2 Guidelines when connecting the electrical wiring ................................................................................................ 88
8.1.3 About electrical compliance .................................................................................................................................. 89
8.1.4 About preferential kWh rate power supply........................................................................................................... 89
8.1.5 Overview of electrical connections except external actuators............................................................................. 90
8.2 Connections to the outdoor unit............................................................................................................................................ 91
8.2.1 To connect the electrical wiring to the outdoor unit ............................................................................................ 91
8.2.2 To reposition the air thermistor on the outdoor unit ........................................................................................... 97
8.3 Connections to the indoor unit .............................................................................................................................................. 98
8.3.1 To connect the main power supply ....................................................................................................................... 101
8.3.2 To connect the backup heater power supply........................................................................................................ 103
8.3.3 To connect the shut-off valve ................................................................................................................................ 105
8.3.4 To connect the electricity meters.......................................................................................................................... 106
8.3.5 To connect the domestic hot water pump............................................................................................................ 107
8.3.6 To connect the alarm output................................................................................................................................. 108
8.3.7 To connect the space cooling/heating ON/OFF output ........................................................................................ 109
8.3.8 To connect the changeover to external heat source ............................................................................................ 110
8.3.9 To connect the power consumption digital inputs ............................................................................................... 111
8.3.10 To connect the safety thermostat (normally closed contact)............................................................................... 112
8.4 After connecting the electrical wiring to the indoor unit...................................................................................................... 113
8.1 About connecting the electrical wiring
Before connecting the electrical wiring
Make sure the water piping is connected.
Typical workflow
Connecting the electrical wiring typically consists of the following stages:
▪ "8.2Connections to the outdoor unit"[491]
▪ "8.3Connections to the indoor unit"[498]
8.1.1 Precautions when connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
INFORMATION
Also read the precautions and requirements in the "1 General safety
precautions"[46].