Wilo Pump TOP-S25/5

Motor Protection System Verification

Verify terminal box type and corresponding protection mechanism

Record the maximum current from the rating plate

Does the thermal tripping setting correspond to the maximum current?

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

Close the check valve on the pressure side

Protect electrical parts from any escaping water

Carefully open the venting screw using a suitable tool

Ensure the necessary inlet pressure is 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

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

Wait 5 minutes before commencing work on the module for 1~ systems to allow voltages to dissipate

Verify 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?

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

7.1.3 Insulation of the pump in cooling/air-conditioning systems

Verify the application of the insulation

Check if the two half-shells of the thermal insulation are correctly fitted and guide pins are engaged in the opposite holes

For cooling/air-conditioning systems, verify that commercially-available diffusion-proof thermal insulation materials are used instead of the supplied shells

8.2 Rotation direction monitoring

Verify the following conditions for three-phase pumps

Briefly switch the pump on to check the direction of rotation

Is the direction of rotation correct (green light on)?

Does the motor's direction of rotation correspond to the direction of rotation arrow on the rating plate?

If the direction of rotation is incorrect

Interchange 2 phases in the terminal box