Table of contentsInstallation and operation manual4RWEYQ8~14T9V1B+RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1A – 2017.04Table of contents1 About the documentation 51.1 About this document.................................................................. 5For the installer 52 About the box 52.1 To remove the accessories from the outdoor unit ..................... 52.2 Accessory pipes: Diameters...................................................... 52.3 To remove the transportation stay............................................. 63 About the units and options 63.1 About the outdoor unit ............................................................... 63.2 System layout............................................................................ 74 Preparation 74.1 Preparing installation site .......................................................... 74.1.1 Installation site requirements of the outdoor unit ........ 74.2 Preparing refrigerant piping....................................................... 74.2.1 Refrigerant piping requirements.................................. 74.2.2 To select the piping size ............................................. 84.2.3 To select refrigerant branch kits.................................. 94.2.4 Multiple outdoor units: Possible layouts...................... 104.3 Preparing water piping .............................................................. 104.3.1 Water circuit requirements .......................................... 104.3.2 Handling the brazed plate heat exchanger ................. 114.3.3 About the water flow rate ............................................ 114.4 Preparing electrical wiring ......................................................... 124.4.1 Safety device requirements ........................................ 125 Installation 135.1 Opening the units ...................................................................... 135.1.1 To open the outdoor unit............................................. 135.1.2 To open the electrical component box of the outdoorunit .............................................................................. 135.2 Mounting the outdoor unit.......................................................... 135.2.1 To provide the installation structure ............................ 135.3 Connecting the refrigerant piping .............................................. 135.3.1 To route the refrigerant piping..................................... 135.3.2 To connect the refrigerant piping to the outdoor unit .. 145.3.3 To connect the multi connection piping kit .................. 145.3.4 To connect the refrigerant branching kit ..................... 145.3.5 To protect against contamination................................ 145.3.6 Using the stop valve and service port ......................... 145.3.7 To remove the pinched pipes...................................... 155.4 Checking the refrigerant piping ................................................. 165.4.1 About checking the refrigerant piping ......................... 165.4.2 Checking refrigerant piping: General guidelines ......... 165.4.3 Checking refrigerant piping: Setup.............................. 165.4.4 To perform a leak test ................................................. 175.4.5 To perform vacuum drying .......................................... 175.5 To insulate the refrigerant piping............................................... 175.6 Charging refrigerant .................................................................. 175.6.1 Precautions when charging refrigerant ....................... 175.6.2 About charging refrigerant .......................................... 185.6.3 To determine the additional refrigerant amount .......... 185.6.4 To charge refrigerant .................................................. 185.6.5 Checks after charging refrigerant................................ 195.6.6 To fix the fluorinated greenhouse gases label ............ 195.7 Connecting the water piping...................................................... 205.7.1 About connecting the water piping.............................. 205.7.2 To connect the water piping........................................ 205.7.3 To fill the water circuit ................................................. 205.7.4 To insulate the water piping ........................................ 205.8 Connecting the electrical wiring................................................. 205.8.1 Field wiring: Overview................................................. 205.8.2 To route and fix the transmission wiring ...................... 205.8.3 To connect the transmission wiring.............................. 215.8.4 To finish the transmission wiring.................................. 215.8.5 To route and fix the power supply................................ 215.8.6 To connect the power supply ....................................... 225.8.7 To connect the optional wiring ..................................... 226 Configuration 236.1 Making field settings................................................................... 236.1.1 About making field settings .......................................... 236.1.2 Field setting components ............................................. 236.1.3 To access the field setting components....................... 246.1.4 To access mode 1 or 2 ................................................ 246.1.5 To use mode 1 ............................................................. 246.1.6 To use mode 2 ............................................................. 246.1.7 Mode 1: Monitoring settings......................................... 256.1.8 Mode 2: Field settings.................................................. 256.1.9 To connect the PC configurator to the outdoor unit ..... 267 Commissioning 267.1 Precautions when commissioning .............................................. 267.2 Checklist before commissioning................................................. 267.3 About test run ............................................................................. 277.4 To perform a test run.................................................................. 277.5 Correcting after abnormal completion of the test run ................. 288 Troubleshooting 288.1 Solving problems based on error codes..................................... 289 Technical data 289.1 Service space: Outdoor unit ....................................................... 289.2 Piping diagram: Outdoor unit...................................................... 29For the user 3010 About the system 3010.1 System layout............................................................................. 3011 User interface 3012 Operation 3112.1 Operation range ......................................................................... 3112.2 Operating the system ................................................................. 3112.2.1 About operating the system ......................................... 3112.2.2 About cooling, heating, fan only, and automaticoperation ...................................................................... 3112.2.3 About the heating operation......................................... 3112.2.4 To operate the system (WITHOUT cool/heatchangeover remote control switch) .............................. 3112.2.5 To operate the system (WITH cool/heat changeoverremote control switch).................................................. 3112.3 Using the dry program................................................................ 3212.3.1 About the dry program ................................................. 3212.3.2 To use the dry program (WITHOUT cool/heatchangeover remote control switch) .............................. 3212.3.3 To use the dry program (WITH cool/heat changeoverremote control switch).................................................. 3212.4 Adjusting the air flow direction.................................................... 3212.4.1 About the air flow flap .................................................. 3212.5 Setting the master user interface ............................................... 3212.5.1 About setting the master user interface ....................... 3213 Maintenance and service 3213.1 About the refrigerant................................................................... 3313.2 After-sales service and warranty ................................................ 3313.2.1 Warranty period ........................................................... 3313.2.2 Recommended maintenance and inspection............... 3314 Troubleshooting 3314.1 Error codes: Overview................................................................ 3414.2 Symptoms that are NOT system malfunctions ........................... 34