you need to follow option 2 from their wiring diagram. You should end up with no black wires connected to your dumb switch. I have pictures of this exact wiring scenario in my review thread:
I picked up this dimmer switch during @TheSmartestHouse Labor Day sale. The main draw to me was the ability for this switch to work in a 3-way configuration without an accessory switch. This means I was able to complete a 3-way setup for a hair over $25! This is less than half of what it would take with a comparable GE z-wave setup. Anyway, here’s my impressions.
The device itself comes nicely packaged and includes a neutral wire jumper. This switch does require a neutral wire in the switch box. No other rocker colors are included, but I always found them to be a waste anyway. The rocker itself also comes with a protective film, which is a nice touch so it doesn’t get banged up while installing.
[7729AF1E-6A93-4B08-BD3C-058AD1D83416] [41DD5434-E3E1-4DE8-BA1C-960E0267F7B5]
Size wise, I’…