Daikin 4MWXM52A2V1B Manual de Usario

Daikin Calderas y calderas 4MWXM52A2V1B

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Installer reference guide

R32 Split series

4MWXM52A2V1B

Table of contents

Installer reference guide

4MWXM-A

R32 Split series

4P678385-1A – 2022.02

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 Overview: About the box................................................................................................................................................ 20

4.2 Outdoor unit ................................................................................................................................................................... 20

4.2.1 To unpack the outdoor unit ........................................................................................................................... 20

4.2.2 To handle the outdoor unit............................................................................................................................ 20

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

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

6.3.1 About mounting the outdoor unit ................................................................................................................. 29

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

7.2.1 About connecting the refrigerant piping ....................................................................................................... 35

7.2.2 Precautions when connecting the refrigerant piping.................................................................................... 35

7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 37

7.2.4 Pipe bending guidelines ................................................................................................................................. 37

7.2.5 To flare the pipe end ...................................................................................................................................... 37

7.2.6 Connections between outdoor and indoor unit using reducers................................................................... 38

7.2.7 Using the stop valve and service port............................................................................................................ 39

7.2.8 To connect the refrigerant piping to the outdoor unit ................................................................................. 41

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........................................................................................ 42

7.3.3 To check for leaks........................................................................................................................................... 42

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

Table of contents

Installer reference guide

4MWXM-A

R32 Split series

4P678385-1A – 2022.02

9 Electrical installation 48

9.1 About connecting the electrical wiring .......................................................................................................................... 48

9.1.1 Precautions when connecting the electrical wiring....................................................................................... 48

9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 50

9.1.3 Specifications of standard wiring components.............................................................................................. 51

9.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 52

10 Finishing the outdoor unit installation 54

10.1 To finish the outdoor unit installation............................................................................................................................ 54

10.2 To close the outdoor unit ............................................................................................................................................... 54

11 Configuration 55

11.1 About standby electricity saving function...................................................................................................................... 55

11.1.1 To turn ON standby electricity saving function ............................................................................................. 55

11.2 About priority room function ......................................................................................................................................... 56

11.2.1 To set the priority room function................................................................................................................... 56

11.3 About night quiet mode.................................................................................................................................................. 56

11.3.1 To turn ON the night quiet mode .................................................................................................................. 56

11.4 About heat mode lock .................................................................................................................................................... 57

11.4.1 To turn ON heat mode lock............................................................................................................................ 57

12 Commissioning 58

12.1 Overview: Commissioning .............................................................................................................................................. 58

12.2 Precautions when commissioning .................................................................................................................................. 58

12.3 Checklist before commissioning ..................................................................................................................................... 59

12.4 Checklist during commissioning ..................................................................................................................................... 59

12.5 Trial operation and testing ............................................................................................................................................. 59

12.5.1 About wiring error check................................................................................................................................ 60

12.5.2 To perform a test run ..................................................................................................................................... 61

12.6 Starting up the outdoor unit........................................................................................................................................... 62

13 Hand-over to the user 63

14 Maintenance and service 64

14.1 Overview: Maintenance and service .............................................................................................................................. 64

14.2 Maintenance safety precautions.................................................................................................................................... 64

14.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 65

14.4 About the compressor .................................................................................................................................................... 65

15 Troubleshooting 66

15.1 Overview: Troubleshooting ............................................................................................................................................ 66

15.2 Precautions when troubleshooting ................................................................................................................................ 66

15.3 Solving problems based on symptoms ........................................................................................................................... 66

15.3.1 Symptom: Indoor units fall, vibrate or make noise ....................................................................................... 66

15.3.2 Symptom: The unit is NOT heating or cooling as expected........................................................................... 67

15.3.3 Symptom: Water leakage ............................................................................................................................... 67

15.3.4 Symptom: Electrical leakage .......................................................................................................................... 67

15.3.5 Symptom: Priority room setting does NOT function..................................................................................... 67

15.3.6 Symptom: Unit does NOT function or burn damage..................................................................................... 67

15.4 Solving problems based on LED behaviour .................................................................................................................... 67

15.4.1 Fault diagnosis using LED on outdoor unit PCB ............................................................................................. 67

16 Disposal 70

16.1 Overview: Disposal.......................................................................................................................................................... 70

16.2 To pump down ................................................................................................................................................................ 70

16.3 To start and stop forced cooling..................................................................................................................................... 71

17 Technical data 72

17.1 Wiring diagram................................................................................................................................................................ 72

17.1.1 Unified wiring diagram legend ....................................................................................................................... 72

17.2 Piping diagram: Outdoor unit......................................................................................................................................... 74

18 Glossary 76