Wilo Pump TOP-S65/7

Verify the use of output filters

Measure the rate of voltage rise (du/dt)

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

Are the voltage spikes within the limit (û < 650 V)?

Measure the minimum voltage at connection terminals (Umin)

Close the check valve on the pressure side

Protect electrical parts from any escaping water

Carefully open the venting screw using a suitable tool

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

Electrical Connection Verification

Verify 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 Line and Fuse Protection

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

8.2 Rotation direction monitoring

Verify the following conditions for three-phase pumps

Is the direction of rotation light green when the pump is briefly switched on?

If the direction of rotation is incorrect, was the pump electrically isolated and two phases interchanged in the terminal box before restarting?

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

Verify the applicability of the insulation

Check the usage of thermal insulation shells

Verify the fitting of the thermal insulation half-shells

Ensure guide pins are engaged in the opposite holes

For cooling/air-conditioning systems, verify the use of diffusion-proof materials