KTY82/220 Temperature sensor terminals
You seem to be misunderstanding the type of sensor. The datasheet explains:


  The temperature sensors in the KTY82 series have a positive temperature coefficient of
  resistance and are suitable for use in measurement and control systems.


They are a silicon resistor with a positive temperature coefficient. There are no active components internally so you do not apply DC power as shown in your schematic.



Figure 1. Connection details.

Your circuit should monitor the resistance between pins 1 and 2. Polarity doesn't matter.

Pin 3 is provided for mounting stability. The pad it is connected to should be isolated from the rest of the circuit.