Hayward system temp sensor

[fungobat]

Hi everyone, I have about a 1month old pool and I'm still trying to get the hang of owning a pool. I think I have the chemistry fairly figured out, have a good friend that's had a pool for years that helped me out at the beginning.

Now I am trying to figure out what is normal and not normal.

It seems that in hotter days, my pool temp reading showing on my Omnilogic is drastically higher than the actual temp of the thermometer I have in the pool -- about 10-15 degrees higher, with pump running on Med and I have tried High. At first I thought it would be a shading issue -- so I try to shade my equipment, specifically the sensor/PVC area but that only lowers it by 1-2 degrees. The times the Pool Tech has come out have been early in the mornings when the sun is barely out and at those times the Omnilogic and pool thermometer are about 1-2 deg off which makes sense.

Should I push for a new sensor perhaps? Or what can I do to ensure nothing else is affecting the Omnilogic readings? Thanks.

 

[duraleigh]

Please read "The "ABC's of Pool Water Chemistry" up in Pool School. That'll give you the basics towards understanding why you are doing things. Armed with that knowledge it is much easier to go forward.

I don't know about Omnilogic......sorry. I do know that pool water temp is usually not pertinent to keeping your chemistry at the correct levels.

 

[SunnyP2000]

i had similar issue . check where your sensor is. when sun was hitting my equipment and temp sensor reading will be lot higher than what temp was outside. i just moved the senor behind the equipment to get better reading. also when my pool was installed they wired my outdoor temp and pool water temp backwards. so my pool temp was actually air temp.

 

[fungobat]

Please read "The "ABC's of Pool Water Chemistry" up in Pool School. That'll give you the basics towards understanding why you are doing things. Armed with that knowledge it is much easier to go forward.

I don't know about Omnilogic......sorry. I do know that pool water temp is usually not pertinent to keeping your chemistry at the correct levels.

Sorry, I didn't mean to imply water chemistry was affecting temp .., What I meant was I focused on getting that understood first, now (separately) I am focusing on understanding the equipment.

i had similar issue . check where your sensor is. when sun was hitting my equipment and temp sensor reading will be lot higher than what temp was outside. i just moved the senor behind the equipment to get better reading. also when my pool was installed they wired my outdoor temp and pool water temp backwards. so my pool temp was actually air temp.

Yeah it seems like between the hours of about 1:30-4:30 the Sun is right on where the sensor is (in the PVC); Just now it was reading about 101F (today is a hot day about 93F) and just by covering/shading it some more it went down to 94F ... water temp still reading about 80 though.

I can't really (easily) move the sensor based on how the equipment is piped, but I'll see what I can do. Since it is so new I wish the pool company was a bit more responsive, I can't believe this doesn't happen more often

 

[1poolman1]

The sensor is probably in contact with the pipe as well as the water and it's reading includes the pipe temperature as well at the lower speeds. At the lower speeds, a horizontal pipe may not be completely full of water (I've seen that on demonstration pools with clear plumbing to show water flow) and the pipe temperature will have more affect on the reading. If that is the case, moving the sensor to a pipe that is vertical and the water flows up will allow the sensor to be completely covered, even at low flow. Or, mount it in the bottom of a horizontal run, the sensor doesn't "care" what position it is in.