Xylem FLYGT Flygt 2071, Installation, Operation And Maintenance Manual

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Check the impeller rotation
WARNING:
The starting jerk can be powerful.
Check the direction of rotation each time the cable has been re-connected and after phase
or total supply failure.
1. Start the motor.
2. Stop the motor.
3. Check that the impeller rotates in the correct direction.
The correct direction of impeller rotation is clockwise when you look at the pump from
above. When started, the pump will react in the opposite direction to the impeller
rotation.
L2
L1 L2 L3
L3 L1
WS001397A
Figure 3: Start reaction
4. If the impeller rotates in the wrong direction, then do the following:
• If the motor has a 1-phase connection, then contact the local sales and service
representative.
• If the motor has a 3-phase connection, then transpose two phase conductors and
repeat this procedure from step 1.
For 3-phase pumps with external starters or without built-in motor protection, the
phases must be shifted on the output terminal of the starter.
Installation
20 Flygt 2071 Installation, Operation, and Maintenance Manual