Hi,
I am trying to upgrade from an old Richdel to Rachio 3 controller. The old wiring does not make any sense to me after I took the old controller off.
Info:
Old Controller: Richdel 476PRi
New Controller: Rachio 3
No of Zones: 4
Old Wiring with Controller:
Old Wiring w/o Controller:
This one probably explains the mess better.
Old Controller wiring Diagram:
Disregard the thick “2nd cable from outside”, it very much looks like a 24v power cable (use Rachio supply instead).
The cable with two yellow, white and blue cable is a wireless rain sensor, disconnect it from the others and hook it up to appropriate terminals (if you wish), here is more info on that:
https://rachio.kustomer.help/en_us/rachio-compatibility-with-hunter-rain-clik-wireless-rain-sensor-HkUCvUJKD
Finally, what you primarily interested in is the “First cable from outside”. White wire from that cable goes to any of the C terminals on Rachio, while others are attached to any available numbered terminal. During the setup, you’ll be able to identify, photograph and name a zone, so which wire goes where does not really matter (besides white).
It doesn’t look like you have a master valve, so indicate as such during the setup.
I am glad you included the last image as I was finding it a little difficult to find the manual. It looks like the terminals are as follows, starting from the left:
Wire Nut:
Rachio
To connect the rain sensor (if you wish, may or may not need it depending on how close & accurate weather stations are), I will try this (not 100% positive on some of this, but getting the information from: How do I install a rain sensor? (Generation 2) (rachio.com))
Thank you @Gene & @Thomas_Lerman for your responses. I don’t want to use the Rain sensor, so without that, this is how I understood your instructions. Is that the correct wiring?
Thanks again for your help!
Disconnect 3 (thick white pair) all together, you don’t need it.
@Gene you mean the white wire labeled as 3? I have 4 zones in total, if I remove that, I will have 3 zones connected i.e. 4,5 &6, no?
Ah, you are right, I mistook it for the power cable. Hook the other side to the C terminal if you can.
You may need to use section of a thin, unused, wire with a wirenut to attach the cable to the Commons.
I agree with @Gene, as you noticed, one of the 2nd cable was connected to zone 1 and the other to common (through the wire nut). All four zones should work with that configuration.
@Gene @Thomas_Lerman thank you for your help! I followed your instructions for the last white pair and was able to manually test all 4 zones!!!.. looks like we’re back in business!!
Good work! Please feel free to ask more questions as they come up.
