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en – Original instructions
24
e-IXPS - Installation, Operation and Maintenance Instructions
5.3
Checking the rotation direction
Preparing the unit
WARNING: Temperature increase due to contact between rotating and fixed components
Checking the direction of rotation by running the unit dry is strictly forbidden.
1.
Check that all the operations described in the previous paragraphs have been completed
correctly.
2.
Fill and vent the pump unit and the suction pipe.
3.
Shut off the discharge on-off valve almost completely.
4.
Fully open the suction on-off valve.
Checking the rotation direction
WARNING:
Loose pump parts and pump damage due to incorrect pump and motor
rotation
Pay attention to the arrow indicating the rotation direction of the pump. Check the rotation
direction. In case of wrong rotation direction, switch 2 phases of the electrical connection.
1.
Locate the arrow on the adapter, the coupling or the cover, to determine the correct
direction of rotation of the motor.
2.
Start the unit.
3.
Check the rotation direction through the motor cover.
4.
Stop the unit.
5.
In case of incorrect rotation direction:
•
Disconnect the power supply
•
Invert two of the three wires of the power supply cord.
6.
Check the direction of rotation again.
5.4
Start-up
DANGER: Overheating of fluid due to closed discharge valves
Do not keep the on-off valve on the discharge side in the closed position in order to throttle
the pump for more than 5 seconds. If the unit has to operate longer with closed discharge
valve or for a longer period below the minimum flow, a bypass circuit must be installed that is
either permanently active or controlled by a minimum flow valve, to prevent overheating of the
fluid in the pump.
Checks before starting the unit
Perform checks after the following events:
•
The first installation.
•
Extraordinary maintenance.
•
A period of inactivity.
Check:
•
The mechanical installation
•
The electrical installation
•
The motor rotation direction
•
That the unit has been filled with the required fluid and vented
•
That all the required auxiliary connections and mechanical seals are in place
•
The presence and level of the lubricating oil.