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Table of Contents
Installer reference guide
2
(A)RXP20~3 RXF20~35A2V1B
R32 split series
4P513661-2 – 2017.11
Table of Contents
About the documentation ..........................................................
Meaning of warnings and symbols..............................
For the installer..........................................................................
General .......................................................................
Installation site ............................................................
Refrigerant ..................................................................
Brine............................................................................
Water ..........................................................................
Electrical .....................................................................
About this document..................................................................
Installer reference guide at a glance .........................................
Overview: About the box ...........................................................
Outdoor unit...............................................................................
To unpack the outdoor unit .........................................
To remove the accessories from the outdoor unit.......
Overview: About the units and options......................................
Identification ..............................................................................
Identification label: Outdoor unit .................................
Overview: Preparation ...............................................................
Preparing the installation site ....................................................
Installation site requirements of the outdoor unit ........
Preparing refrigerant piping .......................................................
Refrigerant piping requirements.................................. 10
Refrigerant piping length and height difference .......... 10
Refrigerant piping insulation ....................................... 10
Preparing electrical wiring .........................................................
About preparing electrical wiring................................. 10
Overview: Installation ................................................................
Opening the units ......................................................................
About opening the units .............................................. 11
To open the outdoor unit............................................. 11
Mounting the outdoor unit..........................................................
About mounting the outdoor unit................................. 11
Precautions when mounting the outdoor unit.............. 11
To provide the installation structure ............................ 11
To install the outdoor unit............................................ 13
To provide drainage .................................................... 13
To prevent the outdoor unit from falling over .............. 13
Connecting the refrigerant piping ..............................................
About connecting the refrigerant piping ...................... 13
Precautions when connecting the refrigerant piping ... 13
Guidelines when connecting the refrigerant piping ..... 14
Pipe bending guidelines.............................................. 14
To flare the pipe end ................................................... 14
Using the stop valve and service port ......................... 15
To connect the refrigerant piping to the outdoor unit .. 15
Checking the refrigerant piping .................................................
About checking the refrigerant piping ......................... 16
Precautions when checking the refrigerant piping ...... 16
To check for leaks....................................................... 16
To perform vacuum drying .......................................... 16
Charging refrigerant ..................................................................
About charging refrigerant .......................................... 17
About the refrigerant .................................................... 17
Precautions when charging refrigerant ........................ 17
To determine the additional refrigerant amount ........... 17
To determine the complete recharge amount .............. 18
To charge additional refrigerant ................................... 18
To fix the fluorinated greenhouse gases label ............. 18
Connecting the electrical wiring.................................................. 18
About connecting the electrical wiring.......................... 18
Precautions when connecting the electrical wiring ...... 18
Guidelines when connecting the electrical wiring ........ 18
Specifications of standard wiring components............. 19
To connect the electrical wiring on the outdoor unit..... 19
Finishing the outdoor unit installation ......................................... 19
To finish the outdoor unit installation ........................... 19
To close the outdoor unit ............................................. 19
Overview: Commissioning .......................................................... 19
Precautions when commissioning .............................................. 20
Checklist before commissioning ................................................. 20
Checklist during commissioning ................................................. 20
To perform a test run .................................................................. 20
Starting up the outdoor unit ........................................................ 20
Overview: Maintenance and service .......................................... 21
Maintenance safety precautions................................................. 21
Checklist for yearly maintenance of the outdoor unit ................. 21
Overview: Troubleshooting......................................................... 21
Precautions when troubleshooting ............................................. 21
Solving problems based on symptoms....................................... 21
Symptom: Indoor units fall, vibrate or make noise ....... 21
Symptom: Water leakage............................................. 21
Symptom: Electrical leakage........................................ 21
Symptom: Unit does NOT function or burn damage .... 21
Overview: Disposal..................................................................... 22
To pump down............................................................................ 22
To start and stop forced cooling ................................................. 22
Wiring diagram ........................................................................... 23
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.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide MUST be
performed by an authorised installer.
1.1.1
Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
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