Daikin VRV IV W+ Series Installer And User Reference Manual page 3

RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B - 2020.10
11.2.3 Symptom: Fan operation is possible, but cooling and heating do not work ................................................ 40
11.2.4 Symptom: The fan speed does not correspond to the setting...................................................................... 40
11.2.5 Symptom: The fan direction does not correspond to the setting................................................................. 40
11.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 40
11.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 40
11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 40
11.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 40
11.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 41
11.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 41
11.2.12 Symptom: Dust comes out of the unit........................................................................................................... 41
11.2.13 Symptom: The units can give off odours ....................................................................................................... 41
11.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 41
11.2.15 Symptom: The display shows "88"................................................................................................................. 41
11.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 41
11.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 42
11.2.18 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 42
12 Relocation
13 Disposal
14 Technical data
14.1 Information requirements for Eco Design...................................................................................................................... 45
For the installer
15 About the box
15.1 About LOOP BY DAIKIN ................................................................................................................................................... 47
15.2 Overview: About the box ................................................................................................................................................ 47
15.3 To unpack the outdoor unit............................................................................................................................................ 48
15.4 To remove the accessories from the outdoor unit ........................................................................................................ 49
15.5 Accessory pipes: Diameters............................................................................................................................................ 49
15.6 To remove the transportation stay ................................................................................................................................ 50
16 About the units and options
16.1 Overview: About the units and options.......................................................................................................................... 51
16.2 Identification label: Outdoor unit................................................................................................................................... 51
16.3 About the outdoor unit................................................................................................................................................... 52
16.4 System layout.................................................................................................................................................................. 52
16.5 Combining units and options.......................................................................................................................................... 54
16.5.1 About combining units and options............................................................................................................... 54
16.5.2 Possible combinations of indoor units........................................................................................................... 54
16.5.3 Possible combinations of outdoor units ........................................................................................................ 54
16.5.4 Possible options for the outdoor unit ............................................................................................................ 55
17 Unit installation
17.1 Preparing the installation site......................................................................................................................................... 57
17.1.1 Installation site requirements of the outdoor unit........................................................................................ 57
17.1.2 Securing safety against refrigerant leaks ....................................................................................................... 59
17.2 Opening the unit ............................................................................................................................................................. 60
17.2.1 About opening the units................................................................................................................................. 60
17.2.2 To open the outdoor unit............................................................................................................................... 61
17.2.3 To open the electrical component box of the outdoor unit ......................................................................... 61
17.3 Mounting the outdoor unit............................................................................................................................................. 62
17.3.1 To provide the installation structure ............................................................................................................. 62
18 Piping installation
18.1 Preparing refrigerant piping ........................................................................................................................................... 64
18.1.1 Refrigerant piping requirements.................................................................................................................... 64
18.1.2 Refrigerant piping insulation.......................................................................................................................... 65
18.1.3 To select the piping size ................................................................................................................................. 65
18.1.4 To select refrigerant branch kits .................................................................................................................... 68
18.1.5 About the piping length.................................................................................................................................. 69
18.1.6 Single outdoor units and standard multi-outdoor-unit combinations.......................................................... 71
18.1.7 Multiple outdoor units: Possible layouts ....................................................................................................... 76
18.2 Preparing water piping ................................................................................................................................................... 78
18.2.1 Water quality requirements........................................................................................................................... 78
18.2.2 Water circuit requirements............................................................................................................................ 78
18.2.3 Handling the brazed plate heat exchanger.................................................................................................... 80
18.2.4 About the water flow rate.............................................................................................................................. 81
Table of contents
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Installer and user reference guide
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