Stenner pump wiring in Pentair Easy Touch Panel

[JasonJoel]

Quick question that I *think* I already know the answer to...

I have a 120v stenner pump for chlorine addition. It is currently plugged into my GFCI outlet, via a digital timer to control run times. I have been thinking about wiring to the Pentair Easy Touch panel through an aux relay, though, and getting rid of the external digital timer. Then it would have the benefit of never being able to run without the filter pump running.

My filter pump is a 240v VS Pentair. Since I already have the 120v stenner, and don't really want to replace the pump, my only options to wire the voltage in-line is to use ANOTHER interposing relay, correct?

Basically:
1. Output of 240v filter pump relay goes to coil input on new non-Pentair, self provided 240V relay I would have to mount in the cabinet.
2. Contact voltage for new self-provided relay would be 120v fed from new 120v breaker installed in the panel.
3. 120V Contact output of the new self-provided relay would be the feed to contact input on the Pentair AUX7 relay.
4. Stenner pump connected to contact output of Pentair relay

Or is there a simpler way of doing it without another relay (and without replacing my stenner pump. ).

 

[Jimrahbe]

jj,

Your idea would work fine... but I would just schedule any Stenner run time within the window of the main pump's scheduled run times..

As an example.. If your main pump runs from 6 am until 6 pm then just schedule your Dosing Aux relay between 6 am and 6 pm...

The downside to using the ET to control the Stenner output is that the ET is limited to 12 total schedules, including any egg-timers that are not the default of 12 hours. So if you wanted the Stenner to run for 10 minutes every hour, you would soon run out of available schedules.

Thanks,

Jim R.

 

[JasonJoel]

That's what I've been doing.

I run my VS filter pump (at different speeds depending if cleaner is running etc) from 8am to 10pm. Right now I just run my Stenner 1pm to 4:30pm to meet chlorine needs. Should be fine as long as the pump is running like it is supposed to (which it always has, no known issues there). I just thought an 'even better' design would be to use the pump power to guarantee it is running before starting the Stenner. Of course with a VS pump, you could technically set the speed to zero and still have power at the relay, so even that is not fool proof...

But I may just leave well enough alone and continue using the external timer, or do as you indicate and wire it to the Aux relay (I have two unused in there now) but not through the pump power. And just make sure the schedules are compatible. That would make it easier to change schedules on the Stenner versus going to the timer outside and reprogramming.

Oh, and I figured out the 12 schedules (including egg timers) the hard way... I added a new schedule from Screen Logic, which it of course did with no complaints. But it never ran (because I was already at 12 schedules). That is one fault of the Screen Logic - it gives zero indication if a schedule is rejected at the panel. Once I actually went to the panel I saw that the new schedule indeed was NOT in there, and if I tried to add it there, then I got the too many schedules error... So I deleted an unused egg timer and then everything was fine.