RO/DI Reservoir Wiring Schematic

[ej797]

This is my schematic for the RO/DI Reservoir I am getting ready to put together. If you have any suggestions please let me know.

Thanks,
EJ


http://i267.photobucket.com/albums/ii309/EJ797/Schematics/ROReseviorFillingCircuit.jpg

[ej797]

T1 converts 120VAC to 12 VDC.

There is a mechanical float valve that shuts of the RO/DI if S1 Fails.

There should be a wire from L1 to P1.

And I forgot the soloniod that turns of the water supply from the house.

Looks like its already time for Version 2.

[kcress]

Yep several problems.

You need a second set of contacts to run the pump.

You need the light across the pump - parallel with it.

You could run the light, pump, and coil all in parallel. I wouldn't.

[ej797]

<a href=showthread.php?s=&postid=12743405#post12743405 target=_blank>Originally posted</a> by kcress
Yep several problems.

You need a second set of contacts to run the pump.

You need the light across the pump - parallel with it.

You could run the light, pump, and coil all in parallel. I wouldn't.

Why, Why and Why?

[kcress]

You cannot run any of those items in series. You have ALL of them in series.

Think of it this way. The pump needs 12V, the light needs 12V, the relay needs 12V. All hooked in series you'd need more than 12V.

You must hook the bottom of the relay to the bottom of the 12V transformer, DIRECTLY.

Then hook the light across the relay coil, and the pump across the relay coil.

[ej797]

Understood, its been a while since basic electronic principles... I will update the drawing later.

[ej797]

Version 2
http://i267.photobucket.com/albums/ii309/EJ797/Schematics/Version2.jpg

[kcress]

THAT! Is exactly what I meant. Great.

Only thing left is that I think your pump, solenoid, and lamp are to run on the 12V from the transformer. Correct?

If so then they would be hooked to T1 on the 12VAC side. Those two points are properly called X1 and X2 and would be labeled on the transformer and on your upper switched group. Not +/-12V as incorrectly labeled.

Oh and the 120VAC connections on the transformer are labeled H1 and H2.

[ej797]

The 12 volt side is AC as well? Cool, so the circuit is good I just need to change some labels?

[stugray]

Be sure that you have your AC vs DC correct.

I would be a bit surprised if you actually have a 12VAC pump.

More likely we are talking about a 12DC power supply.

Stu

[ej797]

I thought the pump would be 12VDC. So all I have to do is name the pins of the transformer?

[kcress]

My friend.. You stand to burn things down or up..

You need to get all this stuff completely straight before actually proceeding. I wasn't aware are noob enough to think a transformer converted anything other than AC to AC. You should not proceed unless you fully understand EXACTLY what each and every component requires to operate safely and correctly.

You do not assume anything about what your various devices require. You need to find out exactly what they need.

You can have the voltages and types of voltage required and still destroy the transformer if its power rating is not great enough.

I suspect you hunt down a local assistant to help you get this all correct. Perhaps some technician or a college prof.,etc.

[ej797]

<a href=showthread.php?s=&postid=12747860#post12747860 target=_blank>Originally posted</a> by kcress
I wasn't aware are noob enough to think a transformer converted anything other than AC to AC.
=

Thanks for the vote of confidence... "A voltage converter or a power supply may be called a "transformer" even if it does not contain an actual transformer as the term is used in electronics."

http://en.wikipedia.org/wiki/Voltage_converter

[ej797]

Version 3

http://i267.photobucket.com/albums/ii309/EJ797/Schematics/TopoffV3.jpg

Parts List:

R1
http://www.radioshack.com/product/index.jsp?parentPage=family&summary=summary&techSpecs=techSpecs&currentTab=summary&cp=2032058.2032230.2032277&custRatings=custRatings&features=features&accessories=accessories&productId=2049722&support=support&tab=techSpecs

S1
Part #46515K41
Mcmaster.com

T1
https://www.freshwatersystems.com/p-4069-8800-series-transformer-100v24v-2-amp-mexico.aspx?affiliateid=10050&qid=0

T2
http://www.radioshack.com/product/index.jsp?productId=2191852&cp=&pg=4&sr=1&origkw=power+supply&kw=power+supply&parentPage=search

P1
https://www.freshwatersystems.com/p-1223-8800-series-booster-pump-24-vac-38-push-in.aspx

Sol 1
https://www.freshwatersystems.com/p-1243-electronic-shut-off-solenoid-valve-with-qc-fittings.aspx

[Siffy]

I don't know exactly what you mean by momentary switch on S2, but if it's just a button you press or a float switch that detects when your container is empty, you'll need a different relay that "latches" and will stay on until another signal (from S1) turns it off. If you found one that will work with 24VAC and a light the same, you could do it all with the same power supply.

[kcress]

<a href=showthread.php?s=&postid=12748886#post12748886 target=_blank>Originally posted</a> by ej797
Thanks for the vote of confidence... "A voltage converter or a power supply may be called a "transformer" even if it does not contain an actual transformer as the term is used in electronics."

http://en.wikipedia.org/wiki/Voltage_converter

That is entirely incorrect. That is the worst screwed up wiki I have ever seen.

A transformer is a device based on an iron core that transforms one alternating current and voltage to another.

A power supply converts an AC source to a DC source.


Okay T2 is not a transformer its a power supply. Call it PS1

Your selected Sol1 and P1 both require 24VAC so why are you using a power supply. Just hook them to your T1.

http://www.box.net/shared/static/pt8e0pz40w.jpg

[ej797]

<a href=showthread.php?s=&postid=12749159#post12749159 target=_blank>Originally posted</a> by Siffy
I don't know exactly what you mean by momentary switch on S2, but if it's just a button you press or a float switch that detects when your container is empty, you'll need a different relay that "latches" and will stay on until another signal (from S1) turns it off. If you found one that will work with 24VAC and a light the same, you could do it all with the same power supply.

Why do I need a seperate relay? What is wrong with the way it is drawn? I beleive that R1 will latch if S1 is closed and S2 is pressed. When the reservoir fills S1 will open removing power from the coil and the RO/DI will turn off until the next time I push S2. Am I wrong?

I had thought about the 24VAC relay, I am going to look into that. However, this is going to be part of a bigger project so I may need the 12VDC anyway. Is there a better place to purchase these components then radio shack?

[ej797]

I'd like to thank you all for your input so far.
Thanks,
EJ

[Siffy]

<a href=showthread.php?s=&postid=12749922#post12749922 target=_blank>Originally posted</a> by ej797
Why do I need a seperate relay? What is wrong with the way it is drawn? I beleive that R1 will latch if S1 is closed and S2 is pressed. When the reservoir fills S1 will open removing power from the coil and the RO/DI will turn off until the next time I push S2. Am I wrong?

I had thought about the 24VAC relay, I am going to look into that. However, this is going to be part of a bigger project so I may need the 12VDC anyway. Is there a better place to purchase these components then radio shack?

Not separate, different. There's nothing wrong with the way it's drawn. R1 will not latch if it's not designed to latch. If S1 is closed and S2 is pressed R1 will close. When S2 is released R1 will open unless it has an internal design to stay closed until S1 is opened. Are you powering the relay's contactor from its own load side? That may or may not work, but it's not designed that way. A time delay relay may even work. Those are designed to stay closed for X seconds after power is removed from the relay.

If you have plans for multiple 12VDC projects I'd shop for a power supply with more muscle than .5 amps.

http://www.12vadapters.com/adapter/power-supply/12v/6-amp-6a.html
for example.

Or you could cannibalize an old PC power supply to run every project you could come up with.

[Siffy]

<a href=showthread.php?s=&postid=12749504#post12749504 target=_blank>Originally posted</a> by kcress
That is entirely incorrect. That is the worst screwed up wiki I have ever seen.

A transformer is a device based on an iron core that transforms one alternating current and voltage to another.

A power supply converts an AC source to a DC source.


Okay T2 is not a transformer its a power supply. Call it PS1

Your selected Sol1 and P1 both require 24VAC so why are you using a power supply. Just hook them to your T1.


T1 is 12VDC and T2 is 24VAC. You just burned something up or down.

Calling a wallwort/powerbrick/powersupply a transformer is pretty common vernacular.

[ej797]

Version 4...
http://i267.photobucket.com/albums/ii309/EJ797/Schematics/Version4.jpg

[ej797]

<a href=showthread.php?s=&postid=12750214#post12750214 target=_blank>Originally posted</a> by Siffy
Not separate, different. There's nothing wrong with the way it's drawn. R1 will not latch if it's not designed to latch. If S1 is closed and S2 is pressed R1 will close. When S2 is released R1 will open unless it has an internal design to stay closed until S1 is opened. Are you powering the relay's contactor from its own load side? That may or may not work, but it's not designed that way. A time delay relay may even work. Those are designed to stay closed for X seconds after power is removed from the relay.


Wouldn't a DP/DT relay work the way it is drawn? Is there a problem with powering the coil of the relay with the contacts of the same relay?

<a href=showthread.php?s=&postid=12750214#post12750214 target=_blank>Originally posted</a> by Siffy
If you have plans for multiple 12VDC projects I'd shop for a power supply with more muscle than .5 amps.

http://www.12vadapters.com/adapter/power-supply/12v/6-amp-6a.html
for example.

Or you could cannibalize an old PC power supply to run every project you could come up with.

Yeah, I am going to worry about that later when I get to the other circuits. I am going to run this circuit on strictly 24VAC if I can.

[stugray]

ej797,

Your latest drawing will work fine.

Stu

[ej797]

Thanks Stu, I think I can take your word for it givin your occupation!!!

[kcress]

I second stugray's comment.

BTW: You have correctly hooked up your relay to make it latching.

I think Siffy is confused as you do not have a "latching relay" but you have successfully created a 'latching circuit'.