Control-R™ - How long do I have to pair the on-demand accessory when the LED turns green?
You have five minutes to complete the pairing process before it times out. If pairing mode times out, press and hold down the Connect button on the module until the LED turns GREEN.
When pairing multiple on-demand accessories, you must enter pairing mode for each accessory. For more information, see section: Step 2: Connect Module to Water Heater and Configure Settings.