Daikin RXA25A5V1B8 Handleiding

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Installer reference guide

R32 Split system air conditioners

RXA20A5V1B8

RXA25A5V1B8

RXA35A5V1B8

Table of contents

Installer reference guide

RXA-A8

R32 Split system air conditioners

4P519439-23X – 2023.09

Table of contents

1 About the documentation 4

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

2 General safety precautions 6

2.1 About the documentation .............................................................................................................................................. 6

2.1.1 Meaning of warnings and symbols ................................................................................................................ 6

2.2 For the installer............................................................................................................................................................... 7

2.2.1 General ........................................................................................................................................................... 7

2.2.2 Installation site ............................................................................................................................................... 8

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

2.2.4 Electrical ......................................................................................................................................................... 13

3 Specific installer safety instructions 16

4 About the box 22

4.1 Outdoor unit ................................................................................................................................................................... 22

4.1.1 To unpack the outdoor unit ........................................................................................................................... 22

4.1.2 To handle the outdoor unit............................................................................................................................ 22

4.1.3 To remove the accessories from the outdoor unit........................................................................................ 23

5 About the unit 24

5.1 Overview: About the units and options.......................................................................................................................... 24

5.2 Identification ................................................................................................................................................................... 24

5.2.1 Identification label: Outdoor unit .................................................................................................................. 24

6 Unit installation 25

6.1 Preparing the installation site......................................................................................................................................... 25

6.1.1 Installation site requirements of the outdoor unit........................................................................................ 26

6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 28

6.2 Opening and closing the unit.......................................................................................................................................... 29

6.2.1 About opening the units................................................................................................................................. 29

6.2.2 To open the outdoor unit............................................................................................................................... 29

6.2.3 To close the outdoor unit............................................................................................................................... 29

6.3 Mounting the outdoor unit............................................................................................................................................. 30

6.3.1 About mounting the outdoor unit ................................................................................................................. 30

6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 30

6.3.3 To provide the installation structure ............................................................................................................. 30

6.3.4 To install the outdoor unit ............................................................................................................................. 31

6.3.5 To provide drainage........................................................................................................................................ 31

6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 32

7 Piping installation 33

7.1 Preparing refrigerant piping ........................................................................................................................................... 33

7.1.1 Refrigerant piping requirements.................................................................................................................... 33

7.1.2 Refrigerant piping insulation.......................................................................................................................... 34

7.1.3 Refrigerant piping length and height difference ........................................................................................... 34

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.................................................................................... 35

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 ...................................................................................................................................... 37

7.2.6 Using the stop valve and service port............................................................................................................ 37

7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 39

7.3 Checking the refrigerant piping...................................................................................................................................... 39

7.3.1 About checking the refrigerant piping........................................................................................................... 39

7.3.2 Precautions when checking the refrigerant piping........................................................................................ 40

7.3.3 To check for leaks ........................................................................................................................................... 40

7.3.4 To perform vacuum drying............................................................................................................................. 41

8 Charging refrigerant 43

8.1 About charging refrigerant ............................................................................................................................................. 43

8.2 About the refrigerant...................................................................................................................................................... 44

8.3 Precautions when charging refrigerant.......................................................................................................................... 45

8.4 To determine the additional refrigerant amount .......................................................................................................... 45

8.5 To determine the complete recharge amount .............................................................................................................. 45

8.6 To charge additional refrigerant..................................................................................................................................... 45