hole for fastening the receiver to the wall with a screw NOTE: The RTH receiver cannot be placed in metal containers (e.g. an assembly box, a metal enclosure of a heater) in order to not to interfere with its operation. hole for fastening the receiver to the wall with a screw 3. A properly completed pairing process is signalled by the LED on the AURATON RTH receiver no longer flashing green and the receiver reverting back to normal operation. In the event of an error during the pairing process, repeat steps 1 and 2. Should more errors occur, deregister all devices by executing the RESET function of the RTH receiver (see RESET - Deregistering all devices paired with the RTH receiver) and attempt to pair the device again. NOTE: One receiver can have only one temperature regulator assigned.