Daikin EHFH03S18DJ3V [3/204] Piping installation 64

Table of contents

Installer reference guide

3

ERLA03DAV3 + EHFH03S18DJ3V

Daikin Altherma 3 R F

4P596806-1A – 2020.05

6.2.2 To open the outdoor unit............................................................................................................................... 53

6.2.3 To close the outdoor unit............................................................................................................................... 54

6.2.4 To open the indoor unit ................................................................................................................................. 54

6.2.5 To lower the switch box on the indoor unit .................................................................................................. 56

6.3.5 To provide drainage........................................................................................................................................ 59

6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 60

6.4 Mounting the indoor unit ............................................................................................................................................... 60

6.4.1 About mounting the indoor unit.................................................................................................................... 60

6.4.2 Precautions when mounting the indoor unit................................................................................................. 60

6.4.3 To install the indoor unit ................................................................................................................................ 60

6.4.4 To connect the drain hose to the drain ......................................................................................................... 61

6.5 Finishing the outdoor unit installation ........................................................................................................................... 62

6.5.1 To finish the outdoor unit installation ........................................................................................................... 62

7 Piping installation 64

7.2.3 To check the water volume and flow rate ..................................................................................................... 68

7.2.4 Changing the pre-pressure of the expansion vessel...................................................................................... 70

7.2.5 To check the water volume: Examples .......................................................................................................... 70

7.3 Connecting the refrigerant piping .................................................................................................................................. 71

7.3.1 About connecting the refrigerant piping ....................................................................................................... 71

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

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

7.3.4 Pipe bending guidelines ................................................................................................................................. 73

7.3.5 To flare the pipe end ...................................................................................................................................... 73

7.3.6 To braze the pipe end..................................................................................................................................... 74

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

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

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

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

7.5.2 About the refrigerant ..................................................................................................................................... 79

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

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

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

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

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

8 Electrical installation 85

8.1 About connecting the electrical wiring .......................................................................................................................... 85

8.1.1 Precautions when connecting the electrical wiring....................................................................................... 85

8.1.2 Guidelines when connecting the electrical wiring......................................................................................... 86

8.1.3 Specifications of standard wiring components.............................................................................................. 87

8.1.4 About electrical compliance........................................................................................................................... 88

8.1.5 About preferential kWh rate power supply................................................................................................... 88

8.1.6 Overview of electrical connections except external actuators ..................................................................... 89

8.2 Connections to the outdoor unit.................................................................................................................................... 89

8.2.1 To connect the electrical wiring to the outdoor unit .................................................................................... 89