Daikin 4MWXM52A2V1B9 Bedienungsanleitung

Daikin Durchlauferhitzer und Boiler 4MWXM52A2V1B9

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Installer reference guide

R32 Split series

4MWXM52A2V1B9

Table of contents

Installer reference guide

4MWXM-A9

R32 Split series

4P708645-1A – 2022.09

Table of contents

1 About the documentation 4

1.1 About this document ...................................................................................................................................................... 4

1.1.1 Meaning of warnings and symbols ................................................................................................................ 5

2 General safety precautions 7

2.1 For the installer............................................................................................................................................................... 7

2.1.1 General ........................................................................................................................................................... 7

2.1.2 Installation site ............................................................................................................................................... 8

2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11

2.1.4 Electrical ......................................................................................................................................................... 12

3 Specific installer safety instructions 15

4 About the box 20

4.1 Outdoor unit ................................................................................................................................................................... 20

4.1.1 To unpack the outdoor unit ........................................................................................................................... 20

4.1.2 To handle the outdoor unit............................................................................................................................ 20

4.1.3 To remove the accessories from the outdoor unit........................................................................................ 21

5 About the unit 22

5.1 Identification ................................................................................................................................................................... 22

5.1.1 Identification label: Outdoor unit .................................................................................................................. 22

6 Unit installation 23

6.1 Preparing the installation site......................................................................................................................................... 23

6.1.1 Installation site requirements of the outdoor unit........................................................................................ 24

6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 26

6.2 Opening the unit ............................................................................................................................................................. 27

6.2.1 About opening the unit .................................................................................................................................. 27

6.2.2 To open the outdoor unit............................................................................................................................... 27

6.3 Mounting the outdoor unit............................................................................................................................................. 28

6.3.1 About mounting the outdoor unit ................................................................................................................. 28

6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 28

6.3.3 To provide the installation structure ............................................................................................................. 28

6.3.4 To install the outdoor unit ............................................................................................................................. 29

6.3.5 To provide drainage........................................................................................................................................ 29

6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 30

7 Piping installation 32

7.1 Preparing refrigerant piping ........................................................................................................................................... 32

7.1.1 Refrigerant piping requirements.................................................................................................................... 32

7.1.2 Refrigerant piping insulation.......................................................................................................................... 33

7.1.3 Refrigerant piping length and height difference ........................................................................................... 33

7.2 Connecting the refrigerant piping .................................................................................................................................. 34

7.2.1 About connecting the refrigerant piping ....................................................................................................... 34

7.2.2 Precautions when connecting the refrigerant piping.................................................................................... 34

7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 36

7.2.4 Pipe bending guidelines ................................................................................................................................. 36

7.2.5 To flare the pipe end ...................................................................................................................................... 36

7.2.6 Connections between outdoor and indoor unit using reducers................................................................... 37

7.2.7 Using the stop valve and service port............................................................................................................ 38

7.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 40

7.3 Checking the refrigerant piping...................................................................................................................................... 41

7.3.1 About checking the refrigerant piping........................................................................................................... 41

7.3.2 Precautions when checking the refrigerant piping........................................................................................ 41

7.3.3 To check for leaks ........................................................................................................................................... 41

7.3.4 To perform vacuum drying............................................................................................................................. 42

8 Charging refrigerant 44

8.1 About charging refrigerant ............................................................................................................................................. 44

8.2 About the refrigerant...................................................................................................................................................... 45

8.3 Precautions when charging refrigerant.......................................................................................................................... 46

8.4 To determine the additional refrigerant amount .......................................................................................................... 46

8.5 To determine the complete recharge amount .............................................................................................................. 46

8.6 To charge additional refrigerant..................................................................................................................................... 46

8.7 To fix the fluorinated greenhouse gases label ............................................................................................................... 47

8.8 To check for refrigerant leaks after charging ................................................................................................................. 47