Elite Direto smart trainer wrong speed

I have purchased an Elite Direto Smart Trainer.
When i connect it to Edge 820 as Indoor Trainer Sensor, and the wheel circunference set to 175 as Elite says, the speed is only of 2-3 km/h, very low.

If I disable Indoor Trainer Sensor and enable Cad/Speed sensor of the same Elite Direto trainer with 175 wheel circunference, the speed is correct.

What is the correct wheel circunference configuration for good speed readings.

Best Regards,