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Wiring a 24v Ranco

Discussion in 'DIY (Do-It-Yourself) Projects' started by SynDen, Jun 11, 2021.

  1. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Anyone ever wire a 24v ranco up before, and happen to have a pic of how you wired it? I have wired the 120v before and no problem with that one, and lots of help for that version online, but none for the 24v. I cant seem to get the 24v to work at all, and think maybe I misunderstand the ranco wiring diagram.
    rancodiagram.JPG
    I have a 24v adapter like this
    24vadapt.JPG

    And trying to wire it to a sprinkler valve like this
    rain-bird-sprinkler-valves-cp075-64_1000.jpg
     
  2. Terry Fox

    Terry Fox Copepod

    Does the power supply output dc or ac voltage?
     
  3. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    its AC > DC
     
    Last edited: Jun 11, 2021
  4. scchase

    scchase Shark Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. B.O.D. Member-at-Large

    You need 120v AC to 24V AC
     
  5. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

  6. Terry Fox

    Terry Fox Copepod

    That one is overkill, but it will work. You won't need more than 1 amp or 1,000 ma.
     
  7. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

  8. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    So, got the new adapter in, but still not sure how to wire it exactly. The other versions of the ranco 120/240 all combine the wire to make 2 wires going out, but the 24v doesnt show them combined, and instead shows 4 wires coming out, and not combined. The sprinkler valve only has 2 wires though, so which one wires to what?
     
  9. Terry Fox

    Terry Fox Copepod

    Is this an auto topoff? You are not showing the whole circuit. What else hooks up? I would think a float valve or a switch of some sort.
     
  10. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    nope not for top off, or anything like that. its part of the Heat transfer unit for my big tank, for the cooling coil specifically, which is basically just a cold water line that coils trough the sump. Its controlled by a ranco, and the sprinkler valve works as the solenoid. So wiring its just 3 parts: the 24v adapter, sprinkler valve and the 24v ranco. The heating is setup and running in a similar way, except instead of the sprinkler valve its hooked to a hot water pump that uses a 120v. That part works great and was easy to setup but just need to figure out the wiring for this 24v one
     
  11. Terry Fox

    Terry Fox Copepod

    The top part looks like the 24v power in. In other words that is what gives the control power to the led display if your model has that. The bottom contacts are NC (normally closed) , NO (normally open) and C (common.
    You will need to cut the connector off the power supply and separate the 2 wires. Since it is ac power it shouldn't matter what wire goes where, however if there is a covered wire and one that is not covered I would consider the non covered wire as common and wire it to both common wire terminals. The black wire on the solenoid can be wired to the 24v terminal on the power in. The white solenoid wire goes either on the NC terminal if the solenoid is normally closed or the NO terminal if your solenoid is normally open. It should be normally closed.
    I hope this helps. If not we can text or talk.
     
  12. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Well so far, that did manage to online the ranco, so I was able to set it, but I havent gotten the valve to operate yet. I have tried with one valve wire in NO, and NC with other wire in 24v, and also with the wire in the C but none of them seem to flip the valve to open yet.
    I wired the power supply directly to the valve and it works fine, and I am currently letting it run this way. I will turn the valve on an off manually for today, but gotta figure out how to get the ranco to do the job
     
    Last edited: Jun 16, 2021
  13. Terry Fox

    Terry Fox Copepod

  14. Terry Fox

    Terry Fox Copepod

    That should do it. The solenoid should be normally closed.
    I will update the pic to make it easier to wire. Didn't see it until I uploaded it.
     
  15. Terry Fox

    Terry Fox Copepod

    solenoid valve.jpg
     
    SynDen likes this.
  16. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Thanks. Haven't tried running the jumper on the commons yet, so Ill try that when I get home.
     
  17. Terry Fox

    Terry Fox Copepod

    You are welcome. That should be how it works. The common breaks the circuit until your temperature rises and closes the normally closed curcuit and energizes the solenoid to circulate your chilled water.
     
  18. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Well adding the jumper worked, sort of. The valve turns on now, but it does not turn off even though the controller says it is off
     
    Last edited: Jun 17, 2021
  19. SynDen

    SynDen Kraken Staff Member M.A.S.C Club Member M.A.S.C. B.O.D. M.A.S.C President M.A.S.C Webmaster

    Okay think I figured out the issue. The one wire actually needs to go in the NO spot instead of NC, otherwise the valve doesn't turn off once the set temp is reached, but working great now, and tank holding steady at 77 degrees.
     
  20. Terry Fox

    Terry Fox Copepod

    Glad you got it working.
     

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