Xylem Flygt 2620.172 Service And Repair Instructions page 4

Table of Contents
4.6 Assemble the pump.......................................................................................................... 40
4.7 Service................................................................................................................................. 58
5 Troubleshooting....................................................................................................................... 61
5.1 Electrical troubleshooting.................................................................................................61
5.2 The pump does not start...................................................................................................61
5.3 The pump does not stop when a level sensor is used.................................................. 62
5.4 The pump starts-stops-starts in rapid sequence............................................................63
5.5 The pump runs but the motor protection trips.............................................................. 63
5.6 The pump delivers too little or no water.........................................................................64
6 Technical Reference................................................................................................................. 65
6.1 Application limits............................................................................................................... 65
6.2 Motor data.......................................................................................................................... 65
6.3 Specific motor data............................................................................................................65
6.4 Dimensions and weights...................................................................................................67
6.5 Tools.................................................................................................................................... 68
6.6 Winding data...................................................................................................................... 69
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4.6.1 Assembly overview..................................................................................................... 40
4.6.2 Install the stator........................................................................................................... 41
4.6.3 Install the pump top: Standard version only........................................................... 42
4.6.4 Install the bearings: Standard version only............................................................. 48
4.6.5 Install the shaft unit.....................................................................................................49
4.6.6 Install the mechanical seal: Standard versions only............................................... 50
4.6.7 Check the seal tightness............................................................................................ 51
4.6.8 Install the impeller: Drainage version...................................................................... 52
4.6.9 Install the impeller: Sludge version.......................................................................... 55
4.6.10 Install the discharge connection: Drainage version only.................................... 57
4.6.11 Install the cover: Sludge version only.................................................................... 58
4.7.1 Inspection.................................................................................................................... 59
4.7.2 Overhaul...................................................................................................................... 60
2620.172/.281 Service and Repair Instructions