Xylem IM205 Vortex Series User Manual
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Vortex Installation, Operation and Maintenance Manual
Start Frequency
When the pump is controlled by level regulators, the on and off levels should be adjusted in
such a way, that the pump does not start more than 20 times an hour.
Minimum and Maximum Submersion Depth
The motor housing should be at least 2/3 submerged for continuous operation at full load
(see Hmin.1 Figure 5). It is good practice, whenever possible to keep the motor housing
completely under water.
For interrupted level controlled operation, less cooling is required. We recommend not to run
the pump with the water level below the top of the volute in order to avoid air being drawn in
(see Hmin.2 Figure 5).
Air in the discharge pipes might impair performance.
The maximum submersion depth is 20m/60ft.
Figure 5
Hmin. 1
Hmin. 2
Start Up Procedures (continued)