Wilo Pump TOP-S25/7

Motor Protection System Verification

Verify terminal box type and corresponding protection mechanism

Is the thermal tripping setting corresponding to the maximum current of the speed stage?

Is the Wilo tripping unit SK 602(N)/SK 622(N) present?

Is the thermal winding contact (WSK) connected to a motor protection system?

Perform reset based on terminal box type

Ensure all poles of the power supply are disconnected before working on the pump

Wait for 5 minutes before commencing work on the module (applies only to 1~ systems)

Voltage and Connection Verification

Check that all connections (including potential-free contacts) are voltage-free

Is the module/terminal box undamaged?

Does the current type and voltage of the mains connection correspond to the specifications on the rating plate?

Connection and Cable Requirements

Ensure the electrical connection is established via a fixed connection line with a connector device or an all-pole switch with a contact opening width of at least 3 mm

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

7.1 Installation / 7.1.3 Insulation

Ensure the following protections are in place for the pump

Check that condensate drain openings are clear and unobstructed

Verify that insulation has not been applied beyond the motor separation joint

9.1 Dismantling/installation of the motor

Read the chapters 'Dismantling/installation of the motor' and 'Decommissioning' before maintenance

Comply with safety instructions in chapters 2.6, 7, and 8

Prepare the pump for dismantling

Is the entire system drained if no check valves are fitted?

Observe manufacturer's information and safety data sheets on possible additives

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

Ensure motor head is not held with the impeller facing downward during installation/dismantling

Is the motor rotated to the desired position without complete removal if only the terminal box is repositioned?