Checking The Direction Of Rotation - Grundfos DPK Series Installation And Operating Instructions Manual

P
1
2
3
S3 operation
Pos. Description
1 Operation
2 Stop
3 Duty cycle
S1, continuous operation
In this operating mode, the pump can operate
continuously without being stopped for cooling. When
the pump is completely submerged, it is sufficiently
cooled by the surrounding liquid.
P
1
2
S1 operation
Pos. Description
1 Operation
2 Stop
Related information
10.1 Operating conditions
18

6.3 Checking the direction of rotation

Check the direction of rotation every time the pump is
connected to a new installation.
1. Remove the pump from the system.
2. Let the pump hang from a lifting device such as
the chain used for lowering the pump into the pit.
t
3. Start and stop the pump while observing the
movement (jerk) of the pump.
4. If connected correctly, the pump jerks
counterclockwise.
5. If the direction of rotation is wrong, interchange
two phases in the power cable.
t
Related information
6. Preparations before startup
9. Fault finding
DANGER
Crushing of hands
Death or serious personal injury
‐
Do not touch the pump when starting it
up.
Without being submerged in the pumped
liquid, start the pump and let it run for
maximum 5 seconds to check the direction
of rotation.
Before startup, make sure that the bottom
of the pit is clean to avoid material or
objects being sucked into the impeller.