Wilo Pump TOP-S30/7

Close the check valve on the pressure side

Protect electrical parts from any escaping water

Carefully open the venting screw using a suitable tool

Is the necessary inlet pressure present at the suction side of the pump?

Carefully push back the motor shaft with a screwdriver several times

Wait for 15 to 30 seconds before screwing the venting screw back in

Screw the venting screw back in

Verify installation and connection

Is the sealing screw including the flat gasket in place?

Prime and vent the unit correctly

Ensure automatic venting of the pump rotor compartment after a short operating period

Is dry running limited to short periods?

Ensure no unauthorized removal of components

7.2.3 Frequency converter operation

Are output filters installed to reduce noise and avoid voltage spikes?

Select the type of filter used for noise reduction

Enter the rate of voltage rise (du/dt) in V/μs

Is the rate of voltage rise within the limit of du/dt < 500 V/μs?

Enter the voltage spikes value (û) in V

Are the voltage spikes within the limit of û < 650 V?

Enter the minimum voltage at connection terminals (Umin) in V

9.1 Dismantling/installation of the motor

Read the chapters 'Dismantling/installation of the motor' and 'Decommissioning' before maintenance, cleaning, and repair work.

Comply with safety instructions

Close the existing check valves on both sides of the pump before dismantling the motor.

Allow the pump to cool to room temperature.

Drain the isolated branch of the system.

If no check valves are fitted, drain the entire system.

Observe manufacturer's information and safety data sheets on possible additives in the unit.

Comply with national regulations for accident prevention to avoid injury from falling motor.

8.2 Rotation direction monitoring

Check the direction of rotation indicator light on the terminal box

Briefly switch the pump on to check the direction of rotation

If the direction of rotation is incorrect, electrically isolate the pump

Interchange 2 phases in the terminal box

Verify the motor's direction of rotation corresponds to the arrow on the rating plate