Step 1 – Press and hold the wireless button on the back of the Connected Home Hub until the LED on the front flashes orange.
Step 2 – Press the tamper switch on the reverse of the DCH-Z120 3 times.
Step 3 – The LED on the DCG-Z120 will flash. Once it stops, the LED on the Connected Home Hub will turn green. Your DCH-Z120 is now un-paired.