Overview: Installation ..................................................................................................................................................... 56

7.2

Opening the units ........................................................................................................................................................... 56

7.2.1

About opening the units................................................................................................................................. 56

7.2.2

To open the outdoor unit............................................................................................................................... 56

7.2.3

To open the switch box cover of the indoor unit .......................................................................................... 57

7.2.4

To open the gas boiler.................................................................................................................................... 58

7.2.5

To open the switch box cover of the gas boiler............................................................................................. 58

7.3

Mounting the outdoor unit............................................................................................................................................. 59

7.3.1

About mounting the outdoor unit ................................................................................................................. 59

7.3.2

Precautions when mounting the outdoor unit .............................................................................................. 59

7.3.3

To provide the installation structure ............................................................................................................. 59

7.3.4

To install the outdoor unit ............................................................................................................................. 62

7.3.5

To provide drainage........................................................................................................................................ 62

7.3.6

To prevent the outdoor unit from falling over .............................................................................................. 63

7.4

Mounting the indoor unit ............................................................................................................................................... 64

7.4.1

About mounting the indoor unit.................................................................................................................... 64

7.4.2

Precautions when mounting the indoor unit................................................................................................. 64

7.4.3

To install the indoor unit ................................................................................................................................ 64

7.5

Mounting the gas boiler.................................................................................................................................................. 66

7.5.1

To install the gas boiler .................................................................................................................................. 66

7.5.2

To install the condensate trap ....................................................................................................................... 67

7.6

Condensate pipe work .................................................................................................................................................... 69

7.6.1

Internal connections....................................................................................................................................... 69

7.6.2

External connections ...................................................................................................................................... 70

7.7

Connecting the refrigerant piping .................................................................................................................................. 70

7.7.1

About connecting the refrigerant piping ....................................................................................................... 70

7.7.2

Precautions when connecting the refrigerant piping.................................................................................... 71

7.7.3

Guidelines when connecting the refrigerant piping...................................................................................... 72

7.7.4

Pipe bending guidelines ................................................................................................................................. 72

7.7.5

To flare the pipe end ...................................................................................................................................... 72

7.7.6

To braze the pipe end..................................................................................................................................... 73

7.7.7

Using the stop valve and service port............................................................................................................ 74

7.7.8

To connect the refrigerant piping to the outdoor unit ................................................................................. 75

7.7.9

To connect the refrigerant piping to the indoor unit .................................................................................... 76

7.8

Checking the refrigerant piping...................................................................................................................................... 76

7.8.1

About checking the refrigerant piping ........................................................................................................... 76

7.8.2

Precautions when checking the refrigerant piping........................................................................................ 77

7.8.3

To check for leaks ........................................................................................................................................... 77

7.8.4

To perform vacuum drying............................................................................................................................. 78

7.9

Charging refrigerant........................................................................................................................................................ 79

7.9.1

About charging refrigerant............................................................................................................................. 79

7.9.2

Precautions when charging refrigerant ......................................................................................................... 80

7.9.3

To determine the additional refrigerant amount .......................................................................................... 80

7.9.4

To determine the complete recharge amount .............................................................................................. 80

7.9.5

To charge additional refrigerant .................................................................................................................... 80

7.9.6

To fix the fluorinated greenhouse gases label............................................................................................... 80

7.10

Connecting water piping................................................................................................................................................. 81

7.10.1

About connecting the water piping ............................................................................................................... 81

7.10.2

Precautions when connecting the water piping............................................................................................ 81

7.10.3

Connecting the water piping of the indoor unit ............................................................................................ 82

7.10.4

Connecting the water piping of the gas boiler .............................................................................................. 83

7.10.5

To fill the space heating circuit ...................................................................................................................... 84

7.10.6

To fill the domestic water circuit of the gas boiler ........................................................................................ 85

7.10.7

To fill the domestic hot water tank................................................................................................................ 85

7.10.8

To insulate the water piping .......................................................................................................................... 85

7.11

Connecting the electrical wiring..................................................................................................................................... 86

7.11.1

About connecting the electrical wiring .......................................................................................................... 86

7.11.2

Precautions when connecting the electrical wiring....................................................................................... 87

7.11.3

Guidelines when connecting the electrical wiring......................................................................................... 87

7.11.4

To connect the electrical wiring to the outdoor unit .................................................................................... 88

7.11.5

To connect the electrical wiring to the indoor unit....................................................................................... 88

7.11.6

To connect the main power supply of the indoor unit.................................................................................. 90

7.11.7

To connect the main power supply of the gas boiler .................................................................................... 91

7.11.8

To connect the communication cable between gas boiler and indoor unit ................................................. 92

7.11.9

To connect the user interface ........................................................................................................................ 94

7.11.10 To connect the shut-off valve ........................................................................................................................ 95

7.11.11 To connect the electrical meter..................................................................................................................... 96

7.11.12 To connect the gas meter .............................................................................................................................. 97

7.11.13 To connect the domestic hot water pump .................................................................................................... 97

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Installer reference guide

Table of Contents