Piping Installation - Daikin VRV IV W+ Series Installer And User Reference Manual

18 Piping installation

In this chapter
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B - 2020.10
18.1 Preparing refrigerant piping ...................................................................................................................................................
18.1.1 Refrigerant piping requirements ...........................................................................................................................
18.1.2 Refrigerant piping insulation..................................................................................................................................
18.1.3 To select the piping size .........................................................................................................................................
18.1.4 To select refrigerant branch kits............................................................................................................................
18.1.5 About the piping length .........................................................................................................................................
18.1.6 Single outdoor units and standard multi-outdoor-unit combinations .................................................................
18.1.7 Multiple outdoor units: Possible layouts...............................................................................................................
18.2 Preparing water piping ...........................................................................................................................................................
18.2.1 Water quality requirements ..................................................................................................................................
18.2.2 Water circuit requirements ...................................................................................................................................
18.2.3 Handling the brazed plate heat exchanger ...........................................................................................................
18.2.4 About the water flow rate .....................................................................................................................................
18.3 Connecting the refrigerant piping..........................................................................................................................................
18.3.1 About connecting the refrigerant piping...............................................................................................................
18.3.2 Precautions when connecting the refrigerant piping............................................................................................
18.3.3 To route the refrigerant piping ..............................................................................................................................
18.3.4 To connect the refrigerant piping to the outdoor unit .........................................................................................
18.3.5 To connect the multi connection piping kit...........................................................................................................
18.3.6 To connect the refrigerant branching kit ..............................................................................................................
18.3.7 To protect against contamination .........................................................................................................................
18.3.8 To braze the pipe end ............................................................................................................................................
18.3.9 Using the stop valve and service port....................................................................................................................
18.3.10 To remove the spun pipes .....................................................................................................................................
18.4 Checking the refrigerant piping..............................................................................................................................................
18.4.1 About checking the refrigerant piping...................................................................................................................
18.4.2 Checking refrigerant piping: General guidelines ...................................................................................................
18.4.3 Checking refrigerant piping: Setup ........................................................................................................................
18.4.4 To perform a leak test............................................................................................................................................
18.4.5 To perform vacuum drying ....................................................................................................................................
18.4.6 To insulate the refrigerant piping ..........................................................................................................................
18.5 Charging refrigerant ...............................................................................................................................................................
18.5.1 Precautions when charging refrigerant .................................................................................................................
18.5.2 About charging refrigerant ....................................................................................................................................
18.5.3 To determine the additional refrigerant amount..................................................................................................
18.5.4 To charge refrigerant .............................................................................................................................................
18.5.5 Checks after charging refrigerant .......................................................................................................................... 100
18.5.6 To fix the fluorinated greenhouse gases label....................................................................................................... 100
18.6 Connecting water piping ........................................................................................................................................................ 101
18.6.1 About connecting the water piping ....................................................................................................................... 101
18.6.2 Precautions when connecting the water piping.................................................................................................... 101
18.6.3 To connect the water piping.................................................................................................................................. 101
18.6.4 To fill the water circuit ........................................................................................................................................... 102
18.6.5 To insulate the water piping .................................................................................................................................. 102
18 Piping installation
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