Daikin VRV IV W+ Series Installation And Operation Manual

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

14 Piping installationInstallation and operation manual27RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1D – 2020.10h High pressure/low pressure gas line stop valveA Valve AB Valve BC Valve C(1)D Valve D(1) Only for heat recovery system.NOTICEDo not connect the vacuum pump to the suction gas stopvalve if the unit is intended to run as a heat pump system.This will increase the risk of unit failure.4 Do one of the following:If Then4a The calculated additionalrefrigerant amount is reachedby above pre-chargingprocedureClose valve B and disconnectthe manifold from the liquidline.4b The total amount ofrefrigerant could not becharged by pre-chargingClose valve B, disconnect themanifold from the liquid line,and perform steps 5~6.INFORMATIONIf the total additional refrigerant amount was reached instep 4 (by pre-charging only), record the amount ofrefrigerant that was added on the additional refrigerantcharge label provided with the unit and attach it on theback side of the front panel.Perform the test procedure as described in"17 Commissioning" [435].Charging refrigerant5 After pre-charging, connect valve A to the refrigerant chargeport and charge the remaining additional refrigerant through thisport. Open all outdoor unit stop valves. At this point, valve Amust remain closed!p< p>R410Aa cdbAa Weighing scalesb Refrigerant R410A tank (siphon system)c Vacuum pumpd Refrigerant charge portA Valve AINFORMATIONFor a multi outdoor unit system, it is not required toconnect all charge ports to a refrigerant tank.The refrigerant will be charged with ±22 kg in 1 hour timeat an outdoor temperature of 30°C DB or with ±6 kg at anoutdoor temperature of 0°C DB.If you need to speed up in case of a multiple outdoorsystem, connect the refrigerant tanks to each outdoor unit.NOTICE▪ The refrigerant charging port is connected to the pipinginside the unit. The unit's internal piping is alreadyfactory charged with refrigerant, so be careful whenconnecting the charge hose.▪ After adding the refrigerant, do not forget to close thelid of the refrigerant charging port. The tighteningtorque for the lid is 11.5 to 13.9 N•m.▪ In order to ensure uniform refrigerant distribution, itmay take the compressor ±10 minutes to start up afterthe unit has started operation. This is not a malfunction.INFORMATIONThe manual refrigerant charge operation will automaticallystop within 30 minutes. If charging is not completed after30 minutes, perform the additional refrigerant chargingoperation again.INFORMATIONAfter charging refrigerant:▪ Record the additional refrigerant amount on therefrigerant label provided with the unit and attach it tothe backside of the front panel.▪ Perform the test procedure described in"17 Commissioning" [435].INFORMATIONAborting the manual refrigerant charge is possible bypushing BS3. The unit will stop and return to idle condition.14.5.5 Checks after charging refrigerant▪ Are all stop valves open?▪ Is the amount of refrigerant, that has been added, recorded on therefrigerant charge label?NOTICEMake sure to open all stop valves after (pre-) charging therefrigerant.Operating with the stop valves closed will damage thecompressor.14.5.6 To fix the fluorinated greenhouse gaseslabel1 Fill in the label as follows:bContains fluorinated greenhouse gases21 1122 kgtCO2 eqGWP × kg1000==+kg=kg=GWP: XXXRXXXaf cdea If a multilingual fluorinated greenhouse gases label isdelivered with the unit (see accessories), peel off theapplicable language and stick it on top of a.b Factory refrigerant charge: see unit name platec Additional refrigerant amount chargedd Total refrigerant chargee Quantity of fluorinated greenhouse gases of the totalrefrigerant charge expressed as tonnes CO2 equivalent.f GWP = Global warming potential