About connecting the electrical wiring .................................................................................................................................. 109

9.1.1

Precautions when connecting the electrical wiring .............................................................................................. 109

9.1.2

Guidelines when connecting the electrical wiring ................................................................................................ 110

9.1.3

Specifications of standard wiring components ..................................................................................................... 111

9.1.4

About electrical compliance .................................................................................................................................. 112

9.1.5

About preferential kWh rate power supply........................................................................................................... 112

9.1.6

Overview of electrical connections except external actuators............................................................................. 113

9.2

Connections to the outdoor unit............................................................................................................................................ 113

9.2.1

To connect the electrical wiring to the outdoor unit ............................................................................................ 113

9.3

Connections to the indoor unit .............................................................................................................................................. 115

9.3.1

To connect the main power supply ....................................................................................................................... 119

9.3.2

To connect the backup heater power supply........................................................................................................ 121

9.3.3

To connect the shut-off valve ................................................................................................................................ 124

9.3.4

To connect the electricity meters.......................................................................................................................... 125

9.3.5

To connect the domestic hot water pump............................................................................................................ 126

9.3.6

To connect the alarm output ................................................................................................................................. 127

9.3.7

To connect the space cooling/heating ON/OFF output ........................................................................................ 128

9.3.8

To connect the changeover to external heat source ............................................................................................ 129

9.3.9

To connect the power consumption digital inputs ............................................................................................... 130

9.3.10

To connect the safety thermostat (normally closed contact)............................................................................... 131

9.3.11

To connect a Smart Grid ........................................................................................................................................ 132

9.3.12

To connect the WLAN cartridge (delivered as accessory)..................................................................................... 136

Before connecting the electrical wiring

Make sure:

▪

The refrigerant piping is connected and checked

▪

The water piping is connected

Typical workflow

Connecting the electrical wiring typically consists of the following stages:

▪

"9.2 Connections to the outdoor