Daikin RXM50A5V1B8 Käyttöohje

Daikin Ilmastointi RXM50A5V1B8

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Installer reference guide

R32 split series

RXM20A5V1B

RXM25A5V1B9

RXM35A5V1B9

RXM42A5V1B

ARXM25A5V1B

ARXM35A5V1B9

RXM50A5V1B8

ARXM50A5V1B8

RXP50N5V1B8

Table of contents

Installer reference guide

RXM-A(9)(8), ARXM-A(9)(8), RXP-N8

R32 split series

4P769827-4C – 2024.07

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 21

4.1 Outdoor unit................................................................................................................................................................... 21

4.1.1 To unpack the outdoor unit........................................................................................................................... 21

4.1.2 To handle the outdoor unit ........................................................................................................................... 21

4.1.3 To remove the accessories from the outdoor unit....................................................................................... 22

5 About the unit 23

5.1 Identification .................................................................................................................................................................. 23

5.1.1 Identification label: Outdoor unit.................................................................................................................. 23

6 Unit installation 24

6.1 Preparing the installation site ........................................................................................................................................ 24

6.1.1 Installation site requirements of the outdoor unit ....................................................................................... 25

6.1.2 Additional installation site requirements of the outdoor unit in cold climates ........................................... 27

6.2 Opening the unit ............................................................................................................................................................ 28

6.2.1 About opening the unit.................................................................................................................................. 28

6.2.2 To open the outdoor unit .............................................................................................................................. 28

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 ............................................................................................. 29

6.3.3 To provide the installation structure............................................................................................................. 29

6.3.4 To install the outdoor unit............................................................................................................................. 30

6.3.5 To provide drainage....................................................................................................................................... 30

6.3.6 To prevent the outdoor unit from falling over.............................................................................................. 31

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.................................................................................................................................. 33

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

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

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

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

7.2.7 To connect the refrigerant piping to the outdoor unit................................................................................. 38

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....................................................................................... 39

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

7.3.4 To perform vacuum drying ............................................................................................................................ 40

8 Charging refrigerant 42

8.1 About charging refrigerant............................................................................................................................................. 42

8.2 About the refrigerant ..................................................................................................................................................... 43

8.3 Precautions when charging refrigerant ......................................................................................................................... 44

8.4 To determine the additional refrigerant amount.......................................................................................................... 44

8.5 To determine the complete recharge amount.............................................................................................................. 44

8.6 To charge additional refrigerant.................................................................................................................................... 44

8.7 To check refrigerant piping joints for leaks after charging refrigerant......................................................................... 45

8.8 To fix the fluorinated greenhouse gases label............................................................................................................... 45

Table of contents

Installer reference guide

RXM-A(9)(8), ARXM-A(9)(8), RXP-N8

R32 split series

4P769827-4C – 2024.07

9 Electrical installation 46

9.1 About connecting the electrical wiring.......................................................................................................................... 46

9.1.1 Precautions when connecting the electrical wiring...................................................................................... 46

9.1.2 Guidelines when connecting the electrical wiring ........................................................................................ 47

9.1.3 Specifications of standard wiring components............................................................................................. 49

9.2 To connect the electrical wiring to the outdoor unit .................................................................................................... 49

10 Finishing the outdoor unit installation 51

10.1 To finish the outdoor unit installation ........................................................................................................................... 51

10.2 Closing the unit............................................................................................................................................................... 51

10.2.1 To close the outdoor unit.............................................................................................................................. 51

11 Configuration 52

11.1 Facility setting................................................................................................................................................................. 52

11.1.1 To set the facility mode ................................................................................................................................. 52

11.2 Standby electricity saving function................................................................................................................................ 52

11.2.1 About the standby electricity saving function .............................................................................................. 52

11.2.2 To turn ON standby electricity saving function............................................................................................. 53

12 Commissioning 54

12.1 Precautions when commissioning ................................................................................................................................. 54

12.2 Checklist before commissioning .................................................................................................................................... 54

12.3 Checklist during commissioning..................................................................................................................................... 55

12.4 To perform a test run ..................................................................................................................................................... 55

12.5 Starting up the outdoor unit.......................................................................................................................................... 56

13 Hand-over to the user 57

14 Maintenance and service 58

14.1 Overview: Maintenance and service.............................................................................................................................. 59

14.2 Maintenance safety precautions ................................................................................................................................... 59

14.3 Checklist for yearly maintenance of the outdoor unit .................................................................................................. 59

14.4 About the compressor ................................................................................................................................................... 59

15 Troubleshooting 61

15.1 Overview: Troubleshooting............................................................................................................................................ 61

15.2 Precautions when troubleshooting................................................................................................................................ 61

15.3 Solving problems based on symptoms .......................................................................................................................... 61

15.3.1 Symptom: Indoor units fall, vibrate or make noise....................................................................................... 61

15.3.2 Symptom: The unit is NOT heating or cooling as expected.......................................................................... 61

15.3.3 Symptom: Water leakage .............................................................................................................................. 62

15.3.4 Symptom: Electrical leakage.......................................................................................................................... 62

15.3.5 Symptom: Unit does NOT function or burn damage .................................................................................... 62

15.4 Fault diagnosis using LED on outdoor unit PCB............................................................................................................. 62

16 Disposal 63

16.1 Overview: Disposal......................................................................................................................................................... 63

16.2 To pump down ............................................................................................................................................................... 63

16.3 To start and stop forced cooling .................................................................................................................................... 64

16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch....................................................... 64

16.3.2 To start and stop forced cooling using the indoor unit user interface......................................................... 64

17 Technical data 65

17.1 Wiring diagram ............................................................................................................................................................... 65

17.1.1 Unified wiring diagram legend ...................................................................................................................... 65

17.2 Piping diagram................................................................................................................................................................ 67

17.2.1 Piping diagram: Outdoor unit........................................................................................................................ 67

18 Glossary 70