Help with pump schedule

[urbantux]

All right to start here are my specs:
15,000 gal vinyl
Superflow-vs pump (1.5hp)
Speed options from 600-3450
Three programmable "steps"
Intellichlor-20 (ic-20)
Filter Pentair cartridge ccp320 (320 sq ft)
Skimmers are both aqua genie

What I need is help coming up with a schedule to run my pump that will balance filtration, chlorine generation, and pump speed (save on electric).

Any suggestions would be great.

Latest test:
4.5 ppm fc
0 cc
7.4 ph
80 ppm TA
80 ppm cya
3500 ppm salt

 

[JasonLion]

You want the lowest speed that still allows the skimmers to be effective and the SWG to be happy. The only way to figure that out is to experiment. Once you have a suitable speed, run just a little faster than that to give yourself a little safety margin. For pump run time, I would start at 6 hours a day and then adjust up or down a little from there. Lengthen the run time if you can't produce enough chlorine, or try shortening the run time if everything is going really well.

 

[urbantux]

So right now I'm running at 80% swg for 10 hours a day. I'm staying around 3ppm chlorine with all day sun on the pool. I feel like it should be more. Recent test today was:

3ppm fc
0ppm cc
7.8 ph
82 degrees
70 CYA

 

[n240sxguy]

You should bump the swg to a higher percent or increase your pump run time so you can get your chlorine up. Maybe add some liquid chlorine to get it higher, and then see how it does.


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[Smykowski]

That seems like a bit much. It seems as though most members with an SWG have theirs set much lower.

How does your water look?

 

[mas985]

The cell is a bit small for that size pool. IC20 adds only 0.7 lbs per day which is a little less than 2 ppm for 10 hours at 80%. That is about 40% extinction at 4.5 ppm so not out of line.

 

[n240sxguy]

Based on some light research and crude math I came up with this. One pound of chlorine is roughly equivalent to a gallon of 12% liquid chlorine. The IC20 makes .7lbs/day running 24/7 at 100%. Running at 80% for 10 hours, yours is making .23lbs/day. If your pool uses 2ppm FC a day, you would need 30 ounces of 12% liquid chlorine per day. Your .23lb is equivalent to about 29.5 ounces of liquid chlorine. You need to raise run time or percent output, or get an IC40 which will output more chlorine.


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[urbantux]

I have bumped it up to 12 hours run time at 80% with various pump speeds but enough flow for the swg to run. Flow amount doesn't matter as long as there is enough for the SWG to run right?

 

[n240sxguy]

Correct. 12 hrs at 80% will give you .28lbs of chlorine per day. 10hrs at 100% would give you .292lbs of chlorine per day.


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[JVTrain]

urbantux, if you could update your signature so your pool details are in all your posts, that would be helpful!

To change your profile and/or signature, select "Settings" (top right under Pool School button). Scroll down (left side) to "My Settings" & select Edit Profile or Edit Signature.

 

[urbantux]

Sorry I'm posting from the mobile site so it wasn't showing up.

Is it better for the SWG to run at 80% for longer or at 100% for less time?

 

[n240sxguy]

It doesn't matter. It's life is based on the amount of time it runs overall. 1 hour at 100% or 10hrs at 10% decreases it's life the same amount. The cell itself is still seeing the same voltage and amperage at 80% and 100% it is just cycling off occasionally when set at 80%.


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[lborne]

Is it better for the SWG to run at 80% for longer or at 100% for less time?

It will cost more to run the pump 10 hrs, so I would use 100% SWG for 8 hrs.