My building is almost 30 years old, and it have neutral wiring, and I thought wiring these are straight forward. I have no issues installing the switch on the single pole in the kitchen. But the 3 way switch wiring is odd and doesn’t look like anything in the manual: I have 2x red, 1x black on the switch. Let me explain the 2 switch boxes:
Main box - It has two white wires capped together (i think this is neutral), two black wires capped together, two bare wire capped together. I do not know what are the capped wires connected to. On that 3-way switch, there is a red wire to the black screw, white and red wires on each brass screw.
Remote box - It has 4 wires (white, black, red, bare) coming out of the box. There are no capped wires. On that 3 way switch, black wire connected to black screw, red and white wires connected to brass screw.
The ZEN21 is installed on the Main Box, I have noticed the following: If I connect the red wire to LINE, white wire to TRAVELER, red wire to LOAD and white to NEUTRAL, the blue LED does not lit. If I swap the wires between LOAD and LINE, the blue LED comes on. The switch will operate, if I turn off the remote switch, it literally cuts power to the ZEN21. If I alternate between LOAD and TRAVELLER, the remote switch will cut power and the ZEN21 is cannot turn the lights on.
Now I revert everything back to the manual Leviton swithces, I want to know what you think. What makes the manual switches work but not the ZEN21? I am under the assumption the LOAD/TRAVELLER can alternate like their manual counterpart?
Do I need to hire someone to rewire the place up?