Wiring a 24v Ranco

SynDen

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#1
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.
View attachment 19073
I have a 24v adapter like this
View attachment 19071

And trying to wire it to a sprinkler valve like this
View attachment 19072
 

SynDen

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#3
its AC > DC
 
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SynDen

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#8
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?
 

Terry Fox

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#9
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.
 

SynDen

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#10
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
 

Terry Fox

Cleaner Shrimp
#11
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.
 

SynDen

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#12
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
 
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Terry Fox

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#14
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.
 

SynDen

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#16
Thanks. Haven't tried running the jumper on the commons yet, so Ill try that when I get home.
 

Terry Fox

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#17
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.
 

SynDen

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#18
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
 
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SynDen

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#19
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.
 
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