New Zodiac TRi Ph too good!

[rthorntn]

Hi,

I replaced an ageing SWG with a Zodiac TRi Ph which I am pretty happy with, I got the large model, the problem is it's too good.

It's summer here and with the timer set to 4 hours and the SWG output set to 60% the Ch level is creeping up.

The solution I was thinking of would be to run the pump for 4 hours but only have the SWG running for maybe 2.5 hours at 100% output but the timers only control on/off they don't seem to allow you to change the preset output level.

I don't have any external panels or controllers.

Do you think I could get away with running the pump for only 3hrs a day with the SWG at 100%, my slightly educated guess would be that my 1hp pump would probably filter around a third of the pool volume in that time.

I am thinking energy saving at the end of the day but if it would mess up the pool...

Cheers
Richard

 

[Bama Rambler]

Why not just run the swg at a lower setting at the same run time?

 

[jblizzle]

3 hours at 100% would be the same FC production as 4 hours at 75% ... so that would actually raise your FC higher than what you are currently doing.

I agree with Dave, why not lower the SWG output to 40% or so with the 4 hour run time and see how that works?

Have you read this: http://www.troublefreepool.com/content/152-determine-pump-run-time

 

[rthorntn]

Thanks!

I was trying to save on wear and tear of the cell, it should theoretically last longer if it's 100% for a couple of hours?

- - - Updated - - -

Have you read this...

Just read it, maybe I might try an hour in the morning and an hour in the afternoon at 100% and see how it goes...

 

[linen]

As I understand it, the percentage setting is an on/off duty cycle, not running the cell at "60% power". The life of the cell is generally dictated by how much chlorine it produces, so it would not shorten the cell life.

 

[rthorntn]

Ah of course linen, thanks for that, so essentially the new chlorinators are SMPS (the old one was a transformer), so 50% output would mean that the cell would only actually be powered half the time, using half the power!

 

[jblizzle]

That is the way I understand it too ...

2 hours at 100% would be the same "wear" as 4 hours at 50% or 8 hours at 25%.

Figure out how much you need to run the pump to keep the water clean to your liking and then set the SWG to whatever % is required to maintain adequate FC.

 

[rthorntn]

Thanks all, I have set it to 4hrs at 50%, that should be about right, I will monitor it every couple of days with my Taylor DPD kit.

 

[jblizzle]

Do you have only the DPD or the recommended FAS-DPD?

What are your CYA and FC levels currently?

 

[Tuffy]

Rthorntn,
I have the zodiac tri myself and was considering upgrading to he PH model. How has that been working for you so far? I have heard a lot of bad reviews about the acid injection on those but I would make my life a lot easier