Daikin VRV IV+ RYYQ8U7Y1B Series Installer And User Manual page 3

RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C - 2021.11
10.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 44
10.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 44
10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 44
10.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 44
10.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 44
10.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 44
10.2.12 Symptom: Dust comes out of the unit........................................................................................................... 45
10.2.13 Symptom: The units can give off odours ....................................................................................................... 45
10.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 45
10.2.15 Symptom: The display shows "88"................................................................................................................. 45
10.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 45
10.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 45
10.2.18 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 45
11 Relocation
12 Disposal
13 Technical data
13.1 Eco Design requirements................................................................................................................................................ 48
For the installer
14 About the box
14.1 About LOOP BY DAIKIN ................................................................................................................................................... 50
14.2 Overview: About the box ................................................................................................................................................ 50
14.3 To unpack the outdoor unit............................................................................................................................................ 51
14.4 To remove the accessories from the outdoor unit ........................................................................................................ 52
14.5 Accessory pipes: Diameters............................................................................................................................................ 52
14.6 To remove the transportation stay ................................................................................................................................ 53
15 About the units and options
15.1 Overview: About the units and options.......................................................................................................................... 54
15.2 Identification label: Outdoor unit................................................................................................................................... 54
15.3 About the outdoor unit................................................................................................................................................... 55
15.4 System layout.................................................................................................................................................................. 55
15.5 Combining units and options.......................................................................................................................................... 56
15.5.1 About combining units and options............................................................................................................... 56
15.5.2 Possible combinations of indoor units........................................................................................................... 56
15.5.3 Possible combinations of outdoor units ........................................................................................................ 57
15.5.4 Possible options for the outdoor unit ............................................................................................................ 58
16 Unit installation
16.1 Preparing the installation site......................................................................................................................................... 60
16.1.1 Installation site requirements of the outdoor unit........................................................................................ 60
16.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 62
16.1.3 Securing safety against refrigerant leaks ....................................................................................................... 63
16.2 Opening the unit ............................................................................................................................................................. 65
16.2.1 About opening the units................................................................................................................................. 65
16.2.2 To open the outdoor unit............................................................................................................................... 65
16.2.3 To open the electrical component box of the outdoor unit ......................................................................... 66
16.3 Mounting the outdoor unit............................................................................................................................................. 67
16.3.1 To provide the installation structure ............................................................................................................. 67
17 Piping installation
17.1 Preparing refrigerant piping ........................................................................................................................................... 69
17.1.1 Refrigerant piping requirements.................................................................................................................... 69
17.1.2 Refrigerant piping insulation.......................................................................................................................... 70
17.1.3 To select the piping size ................................................................................................................................. 70
17.1.4 To select refrigerant branch kits .................................................................................................................... 73
17.1.5 About the piping length.................................................................................................................................. 75
17.1.6 Piping length: VRV DX only............................................................................................................................. 75
17.1.7 Piping length: VRV DX and Hydrobox............................................................................................................. 79
17.1.8 Piping length: VRV DX and RA DX................................................................................................................... 80
17.1.9 Multiple outdoor units: Possible layouts ....................................................................................................... 81
17.2 Connecting the refrigerant piping .................................................................................................................................. 82
17.2.1 About connecting the refrigerant piping ....................................................................................................... 82
17.2.2 Precautions when connecting the refrigerant piping.................................................................................... 83
17.2.3 Multiple outdoor units: Knockout holes ........................................................................................................ 84
17.2.4 To route the refrigerant piping ...................................................................................................................... 84
Table of contents
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Installer and user reference guide
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