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RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B - 2021.11
10.2.6
Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 42
10.2.7
Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 42
10.2.8
Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 42
10.2.9
Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 42
10.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 42
10.2.11 Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 42
10.2.12 Symptom: Dust comes out of the unit........................................................................................................... 43
10.2.13 Symptom: The units can give off odours ....................................................................................................... 43
10.2.14 Symptom: The outdoor unit fan does not spin.............................................................................................. 43
10.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 43
10.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped.................................... 43
10.2.18 Symptom: Hot air can be felt when the indoor unit is stopped.................................................................... 43
13.1
Eco Design requirements................................................................................................................................................ 46
14.1
About LOOP BY DAIKIN ................................................................................................................................................... 48
14.2
Overview: About the box ................................................................................................................................................ 48
14.3
To unpack the outdoor unit............................................................................................................................................ 49
14.4
To remove the accessories from the outdoor unit ........................................................................................................ 50
14.5
Accessory pipes: Diameters............................................................................................................................................ 50
14.6
To remove the transportation stay ................................................................................................................................ 50
15.1
Overview: About the units and options.......................................................................................................................... 52
15.2
Identification label: Outdoor unit................................................................................................................................... 52
15.3
About the outdoor unit................................................................................................................................................... 53
15.4
System layout.................................................................................................................................................................. 53
15.5
Combining units and options.......................................................................................................................................... 54
15.5.1
About combining units and options............................................................................................................... 54
15.5.2
Possible combinations of indoor units........................................................................................................... 54
15.5.3
Possible combinations of outdoor units ........................................................................................................ 54
15.5.4
Possible options for the outdoor unit ............................................................................................................ 55
16.1
Opening the unit ............................................................................................................................................................. 57
16.1.1
About opening the units................................................................................................................................. 57
16.1.2
To open the outdoor unit............................................................................................................................... 57
16.1.3
To open the electrical component box of the outdoor unit ......................................................................... 58
16.2
Mounting the outdoor unit............................................................................................................................................. 58
16.2.1
To provide the installation structure ............................................................................................................. 58
17.1
Preparing refrigerant piping ........................................................................................................................................... 60
17.1.1
Refrigerant piping requirements.................................................................................................................... 60
17.1.2
Refrigerant piping insulation.......................................................................................................................... 61
17.1.3
To select the piping size ................................................................................................................................. 61
17.1.4
To select refrigerant branch kits .................................................................................................................... 63
17.1.5
About the piping length.................................................................................................................................. 64
17.1.6
Piping length: VRV DX only............................................................................................................................. 65
17.1.7
Multiple outdoor units: Possible layouts ....................................................................................................... 68
17.2
Connecting the refrigerant piping .................................................................................................................................. 70
17.2.1
About connecting the refrigerant piping ....................................................................................................... 70
17.2.2
Precautions when connecting the refrigerant piping.................................................................................... 70
17.2.3
Multiple outdoor units: Knockout holes ........................................................................................................ 71
17.2.4
To route the refrigerant piping ...................................................................................................................... 71
17.2.5
To connect the refrigerant piping to the outdoor unit ................................................................................. 72
17.2.6
To connect the multi connection piping kit ................................................................................................... 73
17.2.7
To connect the refrigerant branching kit....................................................................................................... 73
17.2.8
To protect against contamination.................................................................................................................. 74
17.2.9
To braze the pipe end..................................................................................................................................... 74
17.2.10 Using the stop valve and service port............................................................................................................ 75
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Installer and user reference guide
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