Xylem Flygt 3069 - Page 4

6 Maintenance.......................................................................................................................38
6.1 Precautions..................................................................................................................38
6.2 Maintenance guidelines...............................................................................................38
6.3 Torque values..............................................................................................................39
6.4 Change the oil............................................................................................................. 39
6.5 Service the pump.........................................................................................................42
6.5.1 Inspection..............................................................................................................43
6.5.2 Overhaul............................................................................................................... 43
6.5.3 Service in case of alarm........................................................................................44
6.6 Replace the D-impeller................................................................................................ 44
6.6.1 Remove the D-impeller......................................................................................... 45
6.6.2 Install the D-impeller............................................................................................. 45
6.7 Replace the F-impeller................................................................................................ 46
6.7.1 Remove the F-impeller..........................................................................................47
6.7.2 Install the F-impeller..............................................................................................47
6.8 Replace the M-impeller and the cutting wheel.............................................................48
6.8.1 Remove the cutting wheel.....................................................................................49
6.8.2 Remove the M-impeller.........................................................................................49
6.8.3 Install the M-impeller.............................................................................................49
6.8.4 Install the cutting wheel.........................................................................................51
6.9 Replace the N-impeller................................................................................................ 51
6.9.1 Remove the N-impeller......................................................................................... 52
6.9.2 Install the N-impeller............................................................................................. 53
7 Troubleshooting................................................................................................................. 57
7.1 Electrical troubleshooting............................................................................................ 57
7.2 The pump does not start..............................................................................................57
7.3 The pump does not stop when a level sensor is used.................................................58
7.4 The pump starts-stops-starts in rapid sequence......................................................... 58
7.5 The pump runs but the motor protection trips..............................................................59
7.6 The pump delivers too little or no water.......................................................................60
8 Technical Reference.......................................................................................................... 61
8.1 Motor data................................................................................................................... 61
8.1.1 Thermal contacts, opening temperature............................................................... 61
8.2 Application limits..........................................................................................................61
8.3 Minimum permitted liquid level.................................................................................... 61
Table of Contents
2 Flygt 3069 Installation, Operation, and Maintenance Manual