Daikin RWEYQ8T9Y1B Installer And User Manual

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

6 InstallationInstaller and user reference guide25RWEYQ8~14T9V1B + RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1 – 2017.04f Nitrogen▪ Do NOT use anti-oxidants when brazing pipe joints.Residue can clog pipes and break equipment.▪ Do NOT use flux when brazing copper-to-copper refrigerantpiping. Use phosphor copper brazing filler alloy (BCuP), whichdoes not require flux.Flux has an extremely harmful influence on refrigerant pipingsystems. For instance, if chlorine based flux is used, it will causepipe corrosion or, in particular, if the flux contains fluorine, it willdeteriorate the refrigerant oil.6.4.9 Using the stop valve and service portTo handle the stop valve▪ Make sure to keep all stop valves open during operation.▪ The figure below shows the name of each part required inhandling the stop valve.▪ The stop valve is factory closed.cdaba Service port and service port coverb Stop valvec Field piping connectiond Stop valve covera bcdea Service portb Stop valve coverc Hexagon holed Shafte SealTo open the stop valve1 Remove the stop valve cover.2 Insert a hexagon wrench into the stop valve and turn the stopvalve counterclockwise.3 When the stop valve cannot be turned any further, stop turning.Result: The valve is now open.To fully open the Ø19.1 mm~Ø25.4 mm stop valve, turn thehexagonal wrench until a torque between 27 and 33 N•m isachieved.Inadequate torque may cause leakage of refrigerant and breakage ofthe stop valve cap.1234To close the stop valve1 Remove the stop valve cover.2 Insert a hexagon wrench into the stop valve and turn the stopvalve clockwise.3 When the stop valve cannot be turned any further, stop turning.Result: The valve is now closed.Closing direction:To handle the stop valve cover▪ The stop valve cover is sealed where indicated by the arrow. DoNOT damage it.▪ After handling the stop valve, tighten the stop valve coversecurely, and check for refrigerant leaks. For the tighteningtorque, refer to the table below.To handle the service port▪ Always use a charge hose equipped with a valve depressor pin,since the service port is a Schrader type valve.▪ After handling the service port, make sure to tighten the serviceport cover securely. For the tightening torque, refer to the tablebelow.▪ Check for refrigerant leaks after tightening the service port cover.Tightening torquesStop valvesize (mm)Tightening torque N•m (turn clockwise to close)ShaftValve body HexagonalwrenchCap (valvelid)ServiceportØ9.5 5.4~6.6 4 mm 13.5~16.5 11.5~13.9Ø12.7 8.1~9.9 18.0~22.0Ø15.9 13.5~16.5 6 mm 23.0~27.0Ø19.1 27.0~33.0 8 mm 22.5~27.5Ø25.46.4.10 To remove the pinched pipesNOTICEIn case of heat pump mode, do NOT remove the pinchedpipe of the gas line stop valve.WARNINGAny gas or oil remaining inside the stop valve may blow offthe pinched piping.Failure to observe the instructions in procedure belowproperly may result in property damage or personal injury,which may be serious depending on the circumstances.Use the following procedure to remove the pinched piping:1 Remove the valve cover and make sure that the stop valves arefully closed.