Daikin RXM20R5V1B, Installer'S Reference Manual

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Table of contents
Installer reference guide
2
35R5V1B RXM20~35R5V1B
R32 Split Series
4P519439-8H – 2020.07
Table of contents
1 General safety precautions 2
1.1 About the documentation .......................................................... 2
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the installer.......................................................................... 3
1.2.1 General ....................................................................... 3
1.2.2 Installation site ............................................................ 3
1.2.3 Refrigerant — in case of R410A or R32 ..................... 5
1.2.4 Water .......................................................................... 6
1.2.5 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
2.2 Installer reference guide at a glance ......................................... 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Outdoor unit............................................................................... 8
3.2.1 To unpack the outdoor unit ......................................... 8
3.2.2 To remove the accessories from the outdoor unit....... 8
4 About the unit 8
4.1 Overview: About the units and options...................................... 8
4.2 Identification .............................................................................. 8
4.2.1 Identification label: Outdoor unit ................................. 9
5 Preparation 9
5.1 Overview: Preparation ............................................................... 9
5.2 Preparing the installation site .................................................... 9
5.2.1 Installation site requirements of the outdoor unit ........ 9
5.2.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 10
5.2.3 Refrigerant piping length and height difference .......... 10
5.3 Preparing refrigerant piping ....................................................... 11
5.3.1 Refrigerant piping requirements.................................. 11
5.3.2 Refrigerant piping insulation ....................................... 11
5.4 Preparing electrical wiring ......................................................... 11
5.4.1 About preparing electrical wiring................................. 11
6 Installation 11
6.1 Overview: Installation ................................................................ 11
6.2 Opening the units ...................................................................... 11
6.2.1 About opening the units .............................................. 11
6.2.2 To open the outdoor unit............................................. 12
6.3 Mounting the outdoor unit.......................................................... 12
6.3.1 About mounting the outdoor unit................................. 12
6.3.2 Precautions when mounting the outdoor unit.............. 12
6.3.3 To provide the installation structure ............................ 12
6.3.4 To install the outdoor unit............................................ 12
6.3.5 To provide drainage .................................................... 12
6.3.6 To prevent the outdoor unit from falling over .............. 13
6.4 Connecting the refrigerant piping .............................................. 13
6.4.1 About connecting the refrigerant piping ...................... 13
6.4.2 Precautions when connecting the refrigerant piping ... 13
6.4.3 Guidelines when connecting the refrigerant piping ..... 14
6.4.4 Pipe bending guidelines.............................................. 14
6.4.5 To flare the pipe end ................................................... 14
6.4.6 Using the stop valve and service port ......................... 14
6.4.7 To connect the refrigerant piping to the outdoor unit .. 15
6.5 Checking the refrigerant piping ................................................. 15
6.5.1 About checking the refrigerant piping ......................... 15
6.5.2 Precautions when checking the refrigerant piping ...... 15
6.5.3 To check for leaks....................................................... 16
6.5.4 To perform vacuum drying .......................................... 16
6.6 Charging refrigerant .................................................................. 16
6.6.1 About charging refrigerant .......................................... 16
6.6.2 About the refrigerant ................................................... 17
6.6.3 Precautions when charging refrigerant ........................ 17
6.6.4 To determine the additional refrigerant amount ........... 17
6.6.5 To determine the complete recharge amount .............. 17
6.6.6 To charge additional refrigerant ................................... 17
6.6.7 To fix the fluorinated greenhouse gases label ............. 17
6.7 Connecting the electrical wiring.................................................. 18
6.7.1 About connecting the electrical wiring.......................... 18
6.7.2 Precautions when connecting the electrical wiring ...... 18
6.7.3 Guidelines when connecting the electrical wiring ........ 18
6.7.4 Specifications of standard wiring components............. 19
6.7.5 To connect the electrical wiring to the outdoor unit...... 19
6.8 Finishing the outdoor unit installation ......................................... 19
6.8.1 To finish the outdoor unit installation ........................... 19
6.8.2 To close the outdoor unit ............................................. 19
6.9 About the compressor ................................................................ 20
7 Commissioning 20
7.1 Overview: Commissioning .......................................................... 20
7.2 Precautions when commissioning .............................................. 20
7.3 Checklist before commissioning ................................................. 20
7.4 Checklist during commissioning ................................................. 20
7.5 To perform a test run .................................................................. 20
7.6 Starting up the outdoor unit ........................................................ 21
8 Configuration 21
8.1 Facility setting............................................................................. 21
8.2 To set the facility mode .............................................................. 21
9 Hand-over to the user 21
10 Maintenance and service 21
10.1 Overview: Maintenance and service .......................................... 21
10.2 Maintenance safety precautions................................................. 21
10.3 Checklist for yearly maintenance of the outdoor unit ................. 21
11 Troubleshooting 21
11.1 Overview: Troubleshooting......................................................... 21
11.2 Precautions when troubleshooting ............................................. 22
11.3 Solving problems based on symptoms....................................... 22
11.3.1 Symptom: Indoor units fall, vibrate or make noise ....... 22
11.3.2 Symptom: The unit is NOT heating or cooling as
expected ...................................................................... 22
11.3.3 Symptom: Water leakage............................................. 22
11.3.4 Symptom: Electrical leakage........................................ 22
11.3.5 Symptom: Unit does NOT function or burn damage .... 22
11.4 Fault diagnosis using LED on outdoor unit PCB ........................ 22
12 Disposal 22
12.1 Overview: Disposal..................................................................... 22
12.2 To pump down............................................................................ 22
12.3 To start and stop forced cooling ................................................. 23
12.3.1 To start and stop forced cooling using the indoor unit
ON/OFF switch ............................................................ 23
12.3.2 To start and stop forced cooling using the indoor unit
user interface ............................................................... 23
13 Technical data 24
13.1 Wiring diagram ........................................................................... 24
14 Glossary 25
1 General safety precautions
1.1 About the documentation
▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.