To delete a sensor from panel programming slide down from the top of the home screen to access to settings tray then select Settings > Advanced Settings > Enter your Installer Code > Installation > Devices > Security Sensors > Delete Sensor. Select the sensor you want to delete and click the Delete Button.
To pair the sensor select Settings > Advanced Settings > Enter your Installer Code > Installation > Devices > Security Sensors > Auto-Learn Sensor.
While the panel is listening, trip the sensor. The panel should confirm the sensor has been added and display the Sensor ID. Make sure the Sensor ID printed on the sensor and the Sensor ID shown on the screen match up.
In the below guide you can find programming for a variety of 319.5MHz sensors.