Table of contents
Installer and user reference guide
3
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
11.2.5 Symptom: The fan direction does not correspond to the setting................................................................. 43
11.2.6 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 44
11.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 44
11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 44
11.2.9 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 44
11.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 44
11.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 44
11.2.12 Symptom: Dust comes out of the unit........................................................................................................... 45
11.2.13 Symptom: The units can give off odours ....................................................................................................... 45
11.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 45
11.2.15 Symptom: The display shows "88"................................................................................................................. 45
11.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 45
11.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 45
11.2.18 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 45
12 Relocation 46
13 Disposal 47
14 Technical data 48
14.1 Information requirements for Eco Design...................................................................................................................... 48
For the installer 49
15 About the box 50
15.1 About LOOP BY DAIKIN ................................................................................................................................................... 50
15.2 Overview: About the box ................................................................................................................................................ 50
15.3 To unpack the outdoor unit............................................................................................................................................ 51
15.4 To remove the accessories from the outdoor unit ........................................................................................................ 52
15.5 Accessory pipes: Diameters ............................................................................................................................................ 52
15.6 To remove the transportation stay (only for 14+16 HP)................................................................................................ 53
15.7 To remove the transportation stay (only for 18+20 HP)................................................................................................ 54
16 About the units and options 55
16.1 Overview: About the units and options.......................................................................................................................... 55
16.2 Identification label: Outdoor unit................................................................................................................................... 55
16.3 About the outdoor unit................................................................................................................................................... 56
16.4 System layout.................................................................................................................................................................. 56
16.5 Combining units and options.......................................................................................................................................... 57
16.5.1 About combining units and options............................................................................................................... 57
16.5.2 Possible combinations of indoor units........................................................................................................... 58
16.5.3 Possible combinations of outdoor units ........................................................................................................ 58
16.5.4 Possible options for the outdoor unit............................................................................................................ 59
17 Unit installation 61
17.1 Preparing the installation site......................................................................................................................................... 61
17.1.1 Installation site requirements of the outdoor unit........................................................................................ 61
17.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 63
17.1.3 Securing safety against refrigerant leaks ....................................................................................................... 64
17.2 Opening the unit ............................................................................................................................................................. 66
17.2.1 About opening the units................................................................................................................................. 66
17.2.2 To open the outdoor unit............................................................................................................................... 66
17.2.3 To open the electrical component box of the outdoor unit ......................................................................... 67
17.3 Mounting the outdoor unit............................................................................................................................................. 68
17.3.1 To provide the installation structure ............................................................................................................. 68
18 Piping installation 70
18.1 Preparing refrigerant piping ........................................................................................................................................... 70
18.1.1 Refrigerant piping requirements.................................................................................................................... 70
18.1.2 Refrigerant piping insulation.......................................................................................................................... 71
18.1.3 To select the piping size ................................................................................................................................. 71
18.1.4 To select refrigerant branch kits .................................................................................................................... 74
18.1.5 About the piping length.................................................................................................................................. 75
18.1.6 Single outdoor units and standard multi-outdoor-unit combinations >20 HP ............................................. 76
18.1.7 Standard multi-outdoor-unit combinations ≤20 HP and free multi-outdoor-unit combinations ................ 79
18.1.8 Multiple outdoor units: Possible layouts ....................................................................................................... 81
18.2 Connecting the refrigerant piping .................................................................................................................................. 83
18.2.1 About connecting the refrigerant piping ....................................................................................................... 83
18.2.2 Precautions when connecting the refrigerant piping.................................................................................... 83
18.2.3 Multiple outdoor units: Knockout holes ........................................................................................................ 84
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