instrucţiune de funcţionare (2.0 MB)

english– Close the stop valve on the pressure side of thepump and open the stop valve on the suction sidecompletely.– Loosen the vent screw (LV).– Then remove a plug from one of the pump flanges(depending on the position of installation of thepump, the plug must be higher than the LV).– Fill the medium through the filling opening untilthe suction line and the pump are completely filled.– Screw the plug in again and tighten it and thentighten the vent screw.CautionThe suction line can be partially filled andvented, if possible even before the installationof the pump. In addition, a fillingdevice can be fitted before the pump.10. MaintenanceCautionBefore beginning maintenance work, thepump must be taken out of operation,completely separated from the mainssupply and prevented from being switchedon again.Work only to be doneby specialist personnel!10.1 GeneralEach time before dismantling, close off the suctionand pressure side, unscrew fuses and empty thepump.9.2 Checking the direction of rotationCautionBefore the direction of rotation is checked,the pump must be filled with the pumpingmedium and vented.The correct direction of rotation is indicated byarrows on the fan cover of the motor. Viewed fromthe fan, the pump must rotate in clockwise direction(to the right).– Switch the pump on briefly and check the directionof rotation. If necessary, change the phases onthe electrical feed.9.3 Switching the pump on– Before switching the pump on, the stop valve onthe suction side of the pump must be openedcompletely. The stop valve on the pressure sideof the pump should only be partially opened.– Switch on the pump.– When the pipe system has been filled with thepumping medium, the stop valve on the pressureside of the pump should be slowly openedcompletely.CautionIf the pump was equipped with a motorof lower power because of a plannedrestriction of pumping flow, ensure thatthis value is not exceeded. Otherwise themotor will be overloaded. The same appliesin the case of single operation of a twinpump designed for parallel operation. Youmay be able to measure the differentialpressure in order to ensure that thepressure conditions are correct.10.2 Dismantling the pump insert with motor(Figure 15.3/15.4, pag. 63…)Undo the screws (Item 11). Lift out complete insertwith motor.Assemble in the reverse order.The motor block with larger motors from 4 kW isexpediently lifted out using a block and pulley.Before lifting, the insert is loosened with the aid of awedge or lever which is placed between the pumpcasing (Item 1) and/or pump cover (Item 3)(see Sections 15.3 to 15.4, pag. 63…).10.3 Aligning the pump shaftIf the motor was separated from the pump duringassembly or during a repair, the pump shaft must bealigned after installation of the motor, as follows:Check the concentricity of the motor shaft with a dialgauge. The maximum shaft deflection at the frontimpeller seat may be 0.05 mm.10.4 Changing the mechanical shaft seal(Figure 15.3/15.4, pag. 63…)Remove the pump insert as described in Section10.2. Then loosen the hexagon bolt (Item 25) or nut(Item 13) and remove disc (Item 24), impeller (Item 2)and wedge (Item 15). Remove packing ring of themechanical shaft seal from the shaft sleeve (Item 5)and from the shaft and counter-ring in the pumpcover (Item 3). If the shaft sleeve (Item 5) is erodedin the region of the seals, it should be replaced.– Measure the max. motor consumption in ampsand compare the value with the rated current onthe motor rating plate.– Throttle the stop valve on the pressure side of thepump until the current consumption correspondsto the value given on the motor’s type plate.9.4 Switching frequencyMotors smaller than 4 kW: max. 30 switchingsper hour.Other motors: max. 15 switchings per hour.22