Hayward heater and filter speed

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TeenaTeens

TeenaTeens

Bronze Supporter
Apr 25, 2022
301
Tampa FL
Pool Size
12200
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite Pro (T-15)
Hi there

I run my filter 24/7 on low - except for each morning when I schedule to high so my pool heater can work. Someone with a pentair system set up a function called ‘heat demand’ where he runs his filter 24/7 and when the heater clicks on, the filter speed changes to accommodate the flow required. Then drops back again when the heater is done. Does Hayward work this way? If so how can I set it up in my omnilogic?

If not - what speed do I need to run my filter for my heater to work? I run it most mornings as I do laps mid morning and I like the water warmed to 87. My scheduling is intense as I need to schedule both the filter abs the heater for different days depending if I swim or not. Would be great to just have the filter on low and then just schedule my heater rather than having to manage both.

Any advice will be gratefully received .
 
1poolman1 said:
Try this thread:

Omnilogic - Option for heater to force pump on

Good morning. I have an OmniLogic panel and pump with a Hayward natural gas heater. The omnilogic was installed last summer, and I absolutely love it ever since I hardwired the internet connection. The issue I'm having is that the heater does not force a call for the pump to turn on. I only...
www.troublefreepool.com www.troublefreepool.com
Click to expand...
This is exactly it! Although I have no where that heater extend is showing up - so will contact the PB. Thank you.
 
1poolman1 said:
From Hayward:
Hayward heat pumps have a flow rate range of 30 to 70 GPM, with an optimum flow rate of 45 GPM. If your pump is capable of significantly more flow than this, a flow meter is recommended to insure the flow rate is within the prescribed range.
Click to expand...
I read this - but I don’t know what that equates to on my pump. Which is in 1000s not 10s. Probably a dumb question so sorry in advance…
 

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Turn the heater "on," adjust the pump speed until it just starts to actually heat. That is your minimum rate (with a clean filter). Give it 10%-15% more rpm (maybe even 20% to be safe) to account for a dirty filter and you are at the minimum flow for your system. The heater will "know" when the minimum flow has been achieved.
 
TeenaTeens said:
I have this but I’m not sure how to read it 🤦🏻‍♀️
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At 2425 rpm and 40 ft. of head the pump is capable of moving 56gpm. Its hard to figure total head of a system without the proper tools.
Very rough estimate, with a clean filter, multiply the pressure reading by 2.31. There is another number needed, but it requires a vacuum gauge be installed in the pump. That will get you close. Most pool systems are in the 40ft. range. Try the procedure mentioned above. I have set many VSP systems that way with no issues without flow meters, vacuum gauges, etc.
 
1poolman1 said:
Very rough estimate, with a clean filter, multiply the pressure reading by 2.31. There is another number needed, but it requires a vacuum gauge be installed in the pump. That will get you close. Most pool systems are in the 40ft. range. Try the procedure mentioned above. I have set many VSP systems that way with no issues without flow meters, vacuum gauges, etc.
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So the pressure reading on what speed? Because the pressure is higher when it’s on high, and drops when on lower speeds. You’re talking about the PSI guage on the filter right?
 
TeenaTeens said:
When on high the pressure reads at 20.
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That would be 46.2 head plus whatever the vacuum reading is.
Total head changes with water speed. The chart shows that. That's why I use the procedure I outlined above. Set it up once and may have to tweak it a bit and you're done. You'll make yourself a bit "pool crazy" trying to determine all of the minutia of waterflow.
 
1poolman1 said:
Turn the heater "on," adjust the pump speed until it just starts to actually heat. That is your minimum rate (with a clean filter). Give it 10%-15% more rpm (maybe even 20% to be safe) to account for a dirty filter and you are at the minimum flow for your system. The heater will "know" when the minimum flow has been achieved.
Click to expand...
Ok! I will do this tomorrow. Thank you.
 
It runs on 50%! When I did this experiment a while ago it didn’t. Perhaps the filter wasn’t clean enough. The filter was cleaned on Saturday. So if I set it for 60% for heater run times I should be in the clear? 50% is 1725rpm. But the psi at 60% is only 5… so that doesn’t seem right.
 
TeenaTeens said:
It runs on 50%! When I did this experiment a while ago it didn’t. Perhaps the filter wasn’t clean enough. The filter was cleaned on Saturday. So if I set it for 60% for heater run times I should be in the clear? 50% is 1725rpm. But the psi at 60% is only 5… so that doesn’t seem right.
Click to expand...
Pressure is the enemy, we want it as low as possible. It just represents how hard it is for the water to get through the filter and the rest of the system after the filter. Higher pressure=higher head=less flow. Five psi is really good.
 
1poolman1 said:
Pressure is the enemy, we want it as low as possible. It just represents how hard it is for the water to get through the filter and the rest of the system after the filter. Higher pressure=higher head=less flow. Five psi is really good.
Click to expand...
Oh ok! It’s 20 psi on high. So do you think 60% is sufficient run speed to allow for slight rise in pressure? I actually clean my filter every couple of weeks so it never really rises. i might actually try 50% tomorrow and see if it goes on. The psi is the same as 60%
 
TeenaTeens said:
Oh ok! It’s 20 psi on high. So do you think 60% is sufficient run speed to allow for slight rise in pressure? I actually clean my filter every couple of weeks so it never really rises. i might actually try 50% tomorrow and see if it goes on. The psi is the same as 60%
Click to expand...
A pool that is enclosed as yours, with a VSP running at lower speeds, as yours, even with a Florida filter (notoriously small) should not have to have the filter cleaned more than a couple of time a year. We clean based on a pressure increase, which needs to be measured at higher pump speeds for more accuracy. The recommendation on this site is a 25% rise over a clean reading. Manufacturers say an 8-10# rise over clean.
Cleaning is how cartridges wear out. Cleaning a "clean" filter is wasting your time (that could be spent in the pool) and water.
If the 60% mark works for you, then it is good. Its just a starting point that may not need to be changed. Since your pressure reading seldom changes, the 50% rate may work well for you. All pools are different.
 

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