Xylem FLYFT P7900, Installation, Operation And Maintenance Manual

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4.5 Make the electrical connections.................................................................................. 24
4.5.1 General precautions..............................................................................................24
4.5.2 Grounding (earthing) ............................................................................................25
4.5.3 Connect the cables: Standard pumps with MAS 801............................................25
4.5.4 Connect the cables: Pumps with MAS 711...........................................................28
4.5.5 Power cable phase sequence...............................................................................33
4.5.6 Identifying signal leads connected to the PEM, thermal contacts, or
thermistors................................................................................................................. 33
4.5.7 Prepare the SUBCAB ™ cables..............................................................................34
4.6 Cable charts................................................................................................................ 36
4.6.1 Colors and markings of leads............................................................................... 38
4.6.2 Power wiring diagrams: Drive units up to 1.1 kV.................................................. 39
4.7 Check the impeller rotation..........................................................................................42
5 Operation........................................................................................................................... 44
5.1 Precautions..................................................................................................................44
5.2 Noise level...................................................................................................................44
5.3 Estimate zinc anode replacement intervals.................................................................45
5.4 Start the pump.............................................................................................................45
5.5 Modifications for freezing conditions........................................................................... 46
6 Maintenance.......................................................................................................................47
6.1 Precautions..................................................................................................................47
6.1.1 Falling................................................................................................................... 47
6.2 Service.........................................................................................................................48
6.2.1 Inspection..............................................................................................................49
6.2.2 Major overhaul...................................................................................................... 50
6.2.3 Checking insulation and sensors.......................................................................... 51
6.3 Check the insulation, up to 1 kV drives or generators.................................................51
6.4 Check the temperature sensors.................................................................................. 51
6.5 Check the leakage detectors.......................................................................................52
6.5.1 FLS....................................................................................................................... 52
6.6 Change the seal oil......................................................................................................52
6.7 Change the gear oil..................................................................................................... 54
6.8 Replace the hydraulic parts.........................................................................................56
6.8.1 Rotating propeller..................................................................................................56
6.8.2 Disassemble the pump......................................................................................... 57
6.8.3 Assemble the pump.............................................................................................. 60
6.9 Pumps with MAS 801: Replace the PEM.................................................................... 64
6.10 Torque values............................................................................................................65
6.11 Tools..........................................................................................................................66
7 Troubleshooting................................................................................................................. 68
7.1 Electrical troubleshooting............................................................................................ 68
7.2 The pump does not start..............................................................................................68
7.3 The pump does not stop when a level sensor is used.................................................69
7.4 The pump starts-stops-starts in rapid sequence......................................................... 69
7.5 The pump runs but the motor protection trips..............................................................70
8 Technical Reference.......................................................................................................... 71
8.1 Application limits..........................................................................................................71
8.2 Pt100 resistance..........................................................................................................71
8.3 Cable bending radius, weight and diameter................................................................ 72
Table of Contents
2 P7900 Installation, Operation, and Maintenance Manual