About connecting the electrical wiring .................................................................................................................................. 103

9.1.1

Precautions when connecting the electrical wiring .............................................................................................. 103

9.1.2

Guidelines when connecting the electrical wiring ................................................................................................ 104

9.1.3

About electrical compliance .................................................................................................................................. 105

9.1.4

About preferential kWh rate power supply........................................................................................................... 106

9.1.5

Overview of electrical connections except external actuators............................................................................. 106

9.2

Connections to the outdoor unit............................................................................................................................................ 107

9.2.1

To connect the electrical wiring to the outdoor unit ............................................................................................ 108

9.2.2

To reposition the air thermistor on the outdoor unit ........................................................................................... 114

9.3

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

9.3.1

To connect the electrical wiring to the indoor unit............................................................................................... 117

9.3.2

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

9.3.3

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

9.3.4

To connect the backup heater to the main unit.................................................................................................... 124

9.3.5

To connect the shut-off valve ................................................................................................................................ 125

9.3.6

To connect the electricity meters.......................................................................................................................... 126

9.3.7

To connect the domestic hot water pump............................................................................................................ 127

9.3.8

To connect the alarm output ................................................................................................................................. 128

9.3.9

To connect the space cooling/heating ON/OFF output ........................................................................................ 129

9.3.10

To connect the changeover to external heat source ............................................................................................ 130

9.3.11

To connect the power consumption digital inputs ............................................................................................... 131

9.3.12

To connect the safety thermostat (normally closed contact)............................................................................... 133

9.3.13

To connect a Smart Grid ........................................................................................................................................ 134

9.3.14

To connect the WLAN cartridge (delivered as accessory)..................................................................................... 140

9.3.15

To connect the solar input ..................................................................................................................................... 140

9.3.16

To connect the DHW output.................................................................................................................................. 141

Before connecting the electrical wiring

Make sure the water piping is connected.

Typical workflow

Connecting the electrical wiring typically consists of the following stages:

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"9.2 Connections to the outdoor

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"9.3 Connections to the indoor

DANGER: RISK OF ELECTROCUTION

WARNING

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All wiring MUST be performed by an authorised electrician and MUST comply