Daikin VRV IV W+ Series Installer And User Reference Manual

Also see for RWEYQ10T9Y1B: Installer and user guide Installation and operation manual Installation and operation manual

18 | Piping installationInstaller and user reference guide70RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1B – 2020.10DefinitionsTerm DefinitionActual piping length Pipe length between outdoor(a) and indoor unitsEquivalent piping length Pipe length between outdoor(a) and indoor units,including the equivalent length of the pipingaccessoriesTotal piping length Total piping length, from the outdoor to all indoorunits(a) If the system is a multi outdoor installation, re-read "the first outdoor unit branch asseen from the indoor unit".Equivalent length of the piping accessoriesAccessory Equivalent lengthRefnet joint 0.5 mRefnet header 1 mSingle BS1Q100~160 4 mSingle BS1Q25 6 mMulti BS4~16Q14 4 mAllowable height differenceTerm Definition DistanceActual piping length Pipe length between outdoor(a) andindoor units165 mEquivalent pipinglength(b)Pipe length between outdoor(a) andindoor units190 mTotal piping length Total piping length from theoutdoor(a) to all indoor units300 mH1 Height difference between outdoorand indoor units50/40 m(b)H2 Height difference between indoorunits15 m30 m(c)H3 Height difference between outdoorunits5 mH4 Height difference between outdoorunit and BP unit.40 mH5 Height difference between BP units 15 mH6 Height difference between BP unitand RA DX indoor unit5 mH7 Height difference between EKEXV-kits and AHU units5 m(a) If the system capacity is a multi outdoor installation, re-read "the first outdoorbranch as seen from the indoor unit".(b) The allowable height difference is 50 m in case the outdoor unit is positioned higherthan the indoor unit, and 40 m in case the outdoor unit is positioned lower than theindoor unit.