How to pair controls if the battery dies

How do I re-set my boiler controls after changing the batteries?
A:

On the PRT3 the reset button on both the transciever unit in the front of the boiler and the one on the programmable room thermostat itself should be held in for 5 seconds and the unit left next to the boiler for 15 minutes to pair. On the new touch programmer this should happen automatically but can take up to 15 minutes also.