Daikin RWEYQ8T9Y1B Installation And Operation Manual

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

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4 PreparationInstallation and operation manual8RWEYQ8~14T9V1B+RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1A – 2017.04▪ All piping lengths and distances have been taken intoconsideration (see About the piping length in the installerreference guide).▪ The pipe thickness of the refrigerant piping shall comply with theapplicable legislation. The minimal pipe thickness for R410Apiping must be in accordance with the table below.Pipe Ø Minimal thickness t6.4 mm/9.5 mm/12.7 mm 0.80 mm15.9 mm 0.99 mm19.1 mm/22.2 mm 0.80 mm28.6 mm 0.99 mm34.9 mm 1.21 mm41.3 mm 1.43 mm▪ In case the required pipe sizes (inch sizes) are not available, it isalso allowed to use other diameters (mm sizes), taken thefollowing into account:▪ Select the pipe size nearest to the required size.▪ Use the suitable adapters for the change-over from inch to mmpipes (field supply).▪ The additional refrigerant calculation has to be adjusted asmentioned in "5.6.3 To determine the additional refrigerantamount" on page 18.4.2.2 To select the piping sizeINFORMATIONPlease select the proper pipe sizes depending on themode of your system. There are 2 possible modes:▪ heat pump,▪ heat recovery.Determine the proper size using the following tables and referencefigure (only for indication).In case of heat pump modeA B B BCD FGEx yba31 2 4 51,2 VRV DX indoor unit3 BP box4,5 RA DX indoor unita,b Indoor branch kitx,y Outdoor multi connection kitIn case of heat recovery modeA B B BCD EEx yba431 21,2 VRV DX indoor unit3 BS unit4 Cooling only VRV indoor unitA~E Pipinga,b Indoor branch kitx,y Outdoor multi connection kitA, B, C: Piping between outdoor unit and (first)refrigerant branch kitChoose from the following table in accordance with the outdoor unittotal capacity type, connected downstream.In case of heat pump modeOutdoor unitcapacity type (HP)Piping outer diameter size (mm)Gas pipe Liquid pipe8 19.1 9.510 22.212~16 28.6 12.718~22 15.924 34.926~34 19.136~42 41.3In case of heat recovery modeOutdoor unitcapacity type (HP)Piping outer diameter size (mm)Liquid pipe Suction gaspipeHighpressure/lowpressure gaspipe5~8 9.5 19.1 15.910 22.2 19.112 12.7 28.614~16 22.218 15.920~22 28.624 34.926~34 19.136 41.338~42 34.9D: Piping between refrigerant branch kits orrefrigerant branch kit and BS unitChoose from the following table in accordance with the indoor unittotal capacity type, connected downstream. Do not let theconnection piping exceed the refrigerant piping size chosen by thegeneral system model name.