ph Dosing pump question

[JamesW]

The relay coil will be powered when the actuator is moving the return valve to Pool Position.

Just measure if the voltage is Black and Red or Black and White when the Pool Return is open.

You can power the Relay Line In from the Pool Pump Relay Load out terminals to make sure that the Pump is on when the acid dosing is on.

Valve Actuators - Further Reading

www.troublefreepool.com

 

[JamesW]

Perfect! And adding that relay won't put too much load on that JVA port?

No, the relay is only 71 milliamps.

 

[JamesW]

Each JVA requires .75 amps at 24V AC

The coil amperage is 0.071 amps, which is 9.5% of the rated load.

 

[ChristopherDB]

Awesome thank you @JamesW !

Last question. Digikey is out of stock. On Amazon there is a G7L-2A-BUBJ-CB- AC24 (without the "IN" suffix). What does the "IN" indicate and would this be a suitable alternative?

 

[JamesW]

https://www.digikey.com/en/products/detail/omron-electronics-inc-emc-div/G7L-2A-BUBJ-CB-AC24/369371

 

[JamesW]

Is the acid feeder powered by 120 or 240?

 

[ChristopherDB]

It can be powered either by 120v or 240v, but if I'm powering the relay from the pump relay, since I don't have a neutral on that I would need to power it 240v?

 

[ChristopherDB]

Taking a guess here. IN suffix is Inductive Load and without the IN the relay would be for a Resistive Load...

 

[JamesW]

You can power from one Load Terminal and land the neutral on the breaker neutral terminal.

So, you can do it either way (120 or 240).

 

[Dirk]

That's fantastic! Congrat's. I'll still take full credit, even though you didn't use my idea. That's if it keeps working. If not, well, I was never here...

 

[JamesW]

What does the "IN" indicate and would this be a suitable alternative?

Taking a guess here. IN suffix is Inductive Load and without the IN the relay would be for a Resistive Load...

IN means that the contact material is Silver/Tin/Indium (AgSnIn) vs.

When there is no IN in the numbering it is just Silver/Tin contacts.

Silver Tin Indium Oxide contacts exhibit better resistance to arc erosion and welding than silver cadmium oxide contacts.

In any case, the Suffix "IN" is not necessary.

 

[ChristopherDB]

Looks like a spoke to soon when I said "problem solved". One solution introduces another problem .

Where the return line of the Flow Cell goes to that small pipe for the bubbler in the sun shelf, it always returns to the pool. If I have the spa running, it slowly drains, because the supply to the Flow Cell is coming from the spa, and it's returning to the pool.

I have to go to the equipment pad and turn the ball valve off on the return from the Flow Cell so it doesn't drain into the pool when I'm using the spa.

I'm thinking of an electric smart ball valve that I can do remotely before I turn the spa on, but would like to automate it for one less step, and make it wife approved.

I found this Electronic Ball Valve which will automatically return to closed when the power is cut. There is a capacitor inside to provide enough power to return closed. I think this may work. It can be wired to the same relay that will also power the PH Doser Pump. Problem solved; hopefully for good!

 

[JamesW]

Can you show some better pictures of the heater plumbing?

 

[ChristopherDB]

Can you show some better pictures of the heater plumbing?

After the filter it goes to a valve that controls flow between a gas heater and an electric heater (not pictured).

Ideally, I would have put the saddle on the pipe connecting the two tees between those black zip ties, but there wasn't enough room to fit it.

I ended up mounting the electric ball valve inside the box with the flow cell. I used a Jandy Interlock Board 4922 to connect it to an extra relay I had, essentially the same concept you suggested. Now when the pump is on AND the system is in Pool Mode, the relay will power the PH Doser and open the ball valve. When the pump is off or the system is in Spa Mode, the relay is off and there's no power to the PH Doser and the ball valve closes. Project complete!