Daikin RWEYQ8T9Y1B Installation And Operation Manual

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

Contents

7 CommissioningInstallation and operation manual27RWEYQ8~14T9V1B+RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452190-1A – 2017.04Internal wiringVisually check the electrical component box and theinside of the unit on loose connections or damagedelectrical components.Pipe size and pipe insulationBe sure that correct pipe sizes are installed and that theinsulation work is properly executed.Stop valvesBe sure that the stop valves are open on both liquid andgas side.Damaged equipmentCheck the inside of the unit on damaged components orsqueezed pipes.Refrigerant leakCheck the inside of the unit on refrigerant leakage. If thereis a refrigerant leak, try to repair the leak. If the repair isunsuccessful, call your local dealer. Do not touch anyrefrigerant which has leaked out from refrigerant pipingconnections. This may result in frostbite.Oil leakCheck the compressor for oil leakage. If there is an oilleak, try to repair the leak. If the repairing is unsuccessful,call your local dealer.Air inlet/outletCheck that the air inlet and outlet of the unit is notobstructed by paper sheets, cardboard, or any othermaterial.Additional refrigerant chargeThe amount of refrigerant to be added to the unit shall bewritten on the included "Added refrigerant" plate andattached to the rear side of the front cover.Installation date and field settingBe sure to keep record of the installation date on thesticker on the rear of the upper front panel according toEN60335‑2‑40 and keep record of the contents of the fieldsetting(s).Inspect the water filter at the inlet piping of the outdoorunit. Clean if it is dirty.The piping work has been carried out according to thisdocument and the applicable legislation. Make sure thatfollowing components are positioned at their correctplaces:▪ water filter,▪ air purge valve,▪ automatic water supply valve, and▪ expansion tank.Water circuitMake sure that the water circuit is filled.Water flowMake sure that the calculated water flow rate can bereached.7.3 About test runThe procedure below describes the test operation of the completesystem. This operation checks and judges following items:▪ Check for incorrect wiring (communication check with indoorunits).▪ Check of the stop valves opening.▪ Judgement of piping length.In case Hydrobox units are present in the system, the pipe lengthcheck and the refrigerant situation check will not be performed.▪ Make sure to carry out the system test operation after the firstinstallation. Otherwise, the malfunction code will be displayedon the user interface and normal operation or individual indoor unittest run cannot be carried out.▪ Abnormalities on indoor units cannot be checked for each unitseparately. After the test operation is finished, check the indoorunits one by one by performing a normal operation using the userinterface. Refer to the indoor unit installation manual for moredetails (e.g., Hydrobox) concerning the individual test run.INFORMATION▪ It may take 10 minutes to achieve a uniform refrigerantstate before the compressor starts.▪ During the test operation, the refrigerant running soundor the magnetic sound of a solenoid valve may becomeloud and the display indication may change. These arenot malfunctions.7.4 To perform a test run1 Close all front panels in order to not let it be the cause ofmisjudgement (except the electrical component box inspectionopening service cover).2 Make sure all field settings you want are set; see "6.1 Makingfield settings" on page 23.3 Turn ON the power to the outdoor unit and the connectedindoor units.NOTICEBe sure to turn on the power 6 hours before operation inorder to have power running to the crankcase heater andto protect the compressor.4 Make sure the default (idle) situation is existing; see "6.1.4 Toaccess mode 1 or 2" on page 24. Push BS2 for 5 seconds ormore. The unit will start test operation.Result: The test operation is automatically carried out, theoutdoor unit display will indicate " " and the indication "Testoperation" and "Under centralised control" will display on theuser interface of indoor units.Steps during the automatic system test run procedure:Step DescriptionControl before start up (pressure equalisation)Cooling start up controlCooling stable conditionCommunication checkStop valve checkPipe length checkRefrigerant amount checkPump down operationUnit stopNote: During the test operation, it is not possible to stop the unitoperation from a user interface. To abort the operation, press BS3.The unit will stop after ±30 seconds.5 Check the test operation results on the outdoor unit 7‑segmentdisplay.Completion DescriptionNormal completion No indication on the 7‑segment display (idle).