Title: Våtventil Brukermanual.pdf
plate .DN100136DN150156DN2001365 . Place the system back in service by following the “Placing theSystem in Service” section .3 .Insert one cover plate bolt through the cover plate and cover plate gasket to ease alignment .CAUTIONDO NOT over-tighten the cover plate bolts.Failure to follow this instruction could cause damage to the cover plate gasket, resulting in valve leakage.I-751.VDS_19TROUBLESHOOTING – SERIES 751 FIRELOCK EUROPEAN ALARM CHECK VALVE STATIONSPROBLEMPOSSIBLE CAUSESOLUTIONThe system water pressure gauge is fluctuating with the supply pressure.The check valve in the bypass line is installed backward.Check the orientation of the bypass check valve. The arrow must point from the supply side to the system side.Debris is present in the bypass check valve.Remove the threaded cap to the check valve, and remove any debris. Make sure the clapper is free to move.