Daikin VRV W T-Series Installation Manual

Also see for RWEQ120TAYCU: Operation manual Installation manual

Contents

4 PreparationInstallation manual12RWEQ96~432TAYCUVRV W T-Series water-cooled system air conditioner4P540122-1B – 2018.11In case of heat recovery modeUnit: inch (mm)Outside unitcapacity type (MBH)Piping outer diameter sizeSuction gaspipeHigh/lowpressure gaspipeLiquid pipe96 7/8 (22.2) 3/4 (19.1) 3/8 (9.5)120 1-1/8 (28.6) 1/2 (12.7)144 7/8 (22.2)192, 216 1-1/8 (28.6) 5/8 (15.9)240 1-3/8 (34.9)264~336 3/4 (19.1)360~432 1-5/8 (41.3) 1-3/8 (34.9)D: Piping between refrigerant branch kits orrefrigerant branch kit and branch selector 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.In case of heat pump modeUnit: inch (mm)Indoor unit capacityindexPiping outer diameter sizeGas pipe Liquid pipe<54 5/8 (15.9) 3/8 (9.5)54≤x<72 3/4 (19.1)72≤x<111 7/8 (22.2)111≤x<162 1-1/8 (28.6) 1/2 (12.7)162≤x<230 5/8 (15.9)230≤x<300 1-3/8 (34.9) 3/4 (19.1)≥300 1-5/8 (41.3)In case of heat recovery modeUnit: inch (mm)Indoor unit capacityindexPiping outer diameter sizeSuction gaspipeHighpressure/lowpressure gaspipeLiquid pipe<54 5/8 (15.9) 1/2 (12.7) 3/8 (9.5)54≤x<72 3/4 (19.1) 5/8 (15.9)72≤x<111 7/8 (22.2) 3/4 (19.1)111≤x<162 1-1/8 (28.6) 1/2 (12.7)162≤x<230 1-1/8 (28.6) 5/8 (15.9)230≤x<300 1-3/8 (34.9) 3/4 (19.1)≥300 1-5/8 (41.3)Example:▪ Downstream capacity for E=[capacity index of unit 1]▪ Downstream capacity for D=[capacity index of unit 1]+[capacityindex of unit 2]E: Piping between refrigerant branch kit or branchselector unit and indoor unitFor heat pump mode and heat recovery modePipe size for direct connection to indoor unit must be the same asthe connection size of the VRV indoor units.Unit: inch (mm)Indoor unit capacityindexPiping outer diameter sizeGas pipe Liquid pipe05~18 1/2 (12.7) 1/4 (6.4)24~54 5/8 (15.9) 3/8 (9.5)72 3/4 (19.1)96 7/8 (22.2)▪ If a size-up of the piping is required, refer to the table below.a ebcda Outside unitb Main pipesc Increased First refrigerant branch kite Indoor unitUnit: inch (mm)Size upMBH class Liquid piping outer diameter size96 3/8 → 1/2 (9.5 → 12.7)120, 144 1/2 → 5/8 (12.7 → 15.9)192~240 5/8 → 3/4 (15.9 → 19.1)264~432 3/4 → 7/8 (19.1 → 22.2)4 3 3 To select refrigerant branch kitsRefrigerant refnetsFor piping example, refer to "4.3.2 To select the piping size" onpage 11.▪ When using refnet joints at the first branch counted from theoutside unit side, choose from the following table in accordancewith the capacity of the outside unit (example: refnet joint a).Outside unitcapacity type (MBH)2 pipes 3 pipes96 KHRP26A33T9 KHRP25A33T9120~216 KHRP26M72TU9 KHRP25M72TU9240~432 KHRP26M73TU9 KHRP25M73TU9▪ For refnet joints other than the first branch (example refnet joint b),select the proper branch kit model based on the total capacityindex of all indoor units connected after the refrigerant branch.Indoor unit capacityindex2 pipes 3 pipes<72 KHRP26A22T9 KHRP25A22T972≤x<111 KHRP26A33T9 KHRP25A33T9111≤x<246 KHRP26M72TU9 KHRP25M72TU9≥246 KHRP26M73TU9 KHRP25M73TU9▪ Concerning refnet headers, choose from the following table inaccordance with the total capacity of all the indoor units connectedbelow the refnet header.Indoor unit capacityindex2 pipes 3 pipes<72 KHRP26M22H9(Max. 4 branches)orKHRP26M33H9(Max. 8 branches)KHRP25M33H972≤x<111 KHRP26M33H9