I have Heliocol solar system controlled by a Hayward Pro Logic unit. I have set my water temp max to 88 degrees. My pool temp, as displayed on the controller and verified by my floating thermometer, continually surpasses 92/94 degrees. I understand (I think) that it is the Hayward GVA-24 valve actuator that is supposed to restrict the amount of heated water reaching the pool. Now...where is the sensor that tells the valve to close? I have been told it is on the roof sensing the temperature of the roof! This sounds absurd. What does the temperature of the roof have to do with keeping my pool at the set temperature? I know how to manually rotate the GVA-24 valve to close or partially close it but I want to get it back to it working automatically again. Also...what position should the 3-way switch under the valve actuator be left at? Forward moves it one way, back moves it the other and center is neutral or off. A Hayward rep I talked to says if the switch is in the off position that it will not receive commands from the sensor to move. So do I leave it in the back or forward position? It seems like it would burn out the little motor if left it like that.
When this problem arose earlier this season there was a warning (?) on the read-out that said Solar Switch Open (or something like that). That only lasted a few days and for the last few months it has not appeared again.
So...where is the darn sensor, and which position should the actuator switch be in? I thank you all for putting up with this wordy question from a pool newbie and an even newbier forum member.
When this problem arose earlier this season there was a warning (?) on the read-out that said Solar Switch Open (or something like that). That only lasted a few days and for the last few months it has not appeared again.
So...where is the darn sensor, and which position should the actuator switch be in? I thank you all for putting up with this wordy question from a pool newbie and an even newbier forum member.