Installing Video Doorbell v2 and WCC with Incompatible Chimes

I got a Video Doorbell v2 but I was running a VD v1. My original system I installed in my house 22-1/2 years ago is the NuTone IM-4406 Base Station and all the remote stations. At the front door, I had the pushbutton/speaker outdoor station and have the optional AI-29 Chime Module. This system uses two (2) internal transformers.

When I installed the v1, I put in a new, dedicated transformer and wired the v1 to it. I added the Wyze door chime add-on and then just abandoned-in-place the existing IW-6 cable for the pushbutton and speaker. Everything worked fine after adding the transformer. I also added the Wyze Remote Chime Unit that works with the DB v1.

Now that I have a v2, I have read all of the posts I could find on the WCC (WDCWSLU). I wanted to reuse my NuTone electronic chime feature since I am giving up the v1 remote chime box. But this WCC seemed impossible to get any real information on what is in the black box. I am an electrical engineer and I am frustrated by the lack of any type of true schematic on the WCC.

After a lot of research including re-reading the Wyze forum articles and a few YouTube videos, I was able to surmise what the RED, BLACK and WHITE wires are connected to in the circuit, I added a simple 24VAC relay (“OONO” from Amazon $15) to the WCC and wire the normally open contact into my NuTone Base Station to mimic the original contact closure of the pushbutton. I was then able to make the Video Doorbell v2 work with the existing NuTone system. Here is the basic wiring diagram:

I mounted the components on a custom base panel that I made on my CNC router and used an " ABS Plastic Junction Box, Dustproof Weatherproof IP65 (158mm x 90mm x 46mm)" that I got on Amazon (parts list at bottom).

I already had a separate 24VAC / 40VA transformer that I installed when I put in the Wyze Video Doorbell V1, so I reused that transformer for the new Wyze Video Doorbell v2. This is the schematic:

And a detailed diagram of the OONO Relay:

After bench testing this circuit and mounting all of the components, it was time to mount the box. This is the installation with the junction box cover removed:

With this circuit and the OONO normally open relay contact, virtually any chime module can be used, since the n/o contact mimics the pressing of a standard doorbell switch. It works especially well if you have a different transformer for the chime, than the one you want to use to power the DB v2, This is what the finished installation looks like:

And this is what the IA-29 Deluxe Chime Modules looks like installed in the IM-4406 Base Station:

NOTE: The Wyze Video Doorbell V2 must be powered on and remain powered on for 20-30 minutes to “initialize” which just means it needs time to charge the internal capacitor. In the app under “settings > chime” you will get the “Device must initialize…” message. It says to try again in 15-20 minutes but another installation note on the Wyze support page indicates charging will take 20-30 minutes. In my installation, I waited about 35 minutes and then could proceed with the configuration. Return to “settings > chime” in the Wyze app (I can only vouch for the Android version) and then select "Doorbell Chime Type: and set to “Digital” and also set the “Ring Tone Length” to “1 second” (this worked for my installation, you may need to adjust for your installation). When I pushed the doorbell switch on the DB v2 I heard the local chime and also a sound I have not heard in several years: the NuTone IM-4406 chimes, and in every room with an intercom! You will also see the LED indicator on the OONO turn ON for 1 second (or whatever time you set for your chime duration).

I hope this helps someone out with a tricky installation. Here is the list of components I used to make the junction box:

(1) ABS Plastic Junction Box, Dustproof Weatherproof IP65 Electrical Box - Universal Project Enclosure Pale Pale Grey, with PC Transparent/Clear Cover and Fixed Ear 6.2"x3.5"x1.8"(158x90x46mm)
Awclub ABS Plastic Junction Box, Dustproof Weatherproof IP65 Electrical Box - Universal Project Enclosure Pale Pale Grey, with PC Transparent/Clear Cover and Fixed Ear 6.2"x3.5"x1.8"(158x90x46mm) - Amazon.com

(1) OONO DPST 1NO 1NC 8Amp Power Relay Module, AC/DC 24V Control Voltage
Amazon.com: OONO DPST 1NO 1NC 8Amp Power Relay Module, AC/DC 24V Control Voltage : Industrial & Scientific

(1) Glarks 70Pcs(5Sets) Terminal Block Set, 5Pcs 7 Positions 600V 15A Dual Row Screw Terminals Strip + 5Pcs Pre-Insulated Barrier Strips + 60Pcs Insulated Fork Wire Connector (7P+Fork Connector)
Amazon.com: Glarks 124Pcs(8Sets) Terminal Block Set, 8Pcs 3 4 5 6 7 8 10 12 Positions 600V 15A Dual Row Screw Terminals Strip + 16Pcs Pre-Insulated Barrier Strips + 100Pcs Insulated Fork Wire Connector : Industrial & Scientific
(NOTE: I used a 7-pole because that is what I had in my stock, but a 6-pole could be used and save a little panel space)

–Dave Z

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This is excellent! I especially like the clear cover on your junction box that shows off your work and allows you to see the relay module’s LED. Everything’s so neat and clean!

Thank you for sharing! :+1:

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