Manual operation of solar actuator

ggezpz

New member
May 17, 2025
1
Elk Grove, CA
Hi all,

Have not been able to find an answer for this admittedly fairly specific question on TFP. Thought I'd finally post.

So we have a pretty standard setup with a Jandy variable speed pump and rooftop solar. There is a solar actuator valve that turns on and off to allow water flow to the roof. BUT, the rooftop sensor is broken and I've not been able to find anyone willing to go up and replace it. Annoying, but what I've done the past few seasons instead is to run in "manual" mode. What I mean by that is, on a hot summer day, the pump runs the usual filtration and cleaning cycles (Presets 1 and 2) with the solar valve in the CLOSED position. Then, in the afternoon, I will go and manually toggle the solar (there is a box with ON, OFF, and AUTO settings) to ON, watch the actuator valve turn, then run the Heating cycle (Preset 3) on the pump controller. After a few hours, I turn off the pump, and switch the solar back to the OFF position.

So my question is this: do I need to be turning the solar back and forth between OFF and ON every single day I want to run a heating session? Or can it just stay in the ON position as long as we need to get the pool up to temperature? Will the solar valve being open affect operation of the filtration and cleaning cycles? Or does the pump "know" to not use that solar pipe in those cycles?
 
Welcome to TFP.

If you leave the solar valve open when it is cloudy or at night, and the roof panels are cooler than the water, you will cool the pool and lose heat.

The pump does not know anything about the solar pipe.

 
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Hi all,

Have not been able to find an answer for this admittedly fairly specific question on TFP. Thought I'd finally post.

So we have a pretty standard setup with a Jandy variable speed pump and rooftop solar. There is a solar actuator valve that turns on and off to allow water flow to the roof. BUT, the rooftop sensor is broken and I've not been able to find anyone willing to go up and replace it. Annoying, but what I've done the past few seasons instead is to run in "manual" mode. What I mean by that is, on a hot summer day, the pump runs the usual filtration and cleaning cycles (Presets 1 and 2) with the solar valve in the CLOSED position. Then, in the afternoon, I will go and manually toggle the solar (there is a box with ON, OFF, and AUTO settings) to ON, watch the actuator valve turn, then run the Heating cycle (Preset 3) on the pump controller. After a few hours, I turn off the pump, and switch the solar back to the OFF position.

So my question is this: do I need to be turning the solar back and forth between OFF and ON every single day I want to run a heating session? Or can it just stay in the ON position as long as we need to get the pool up to temperature? Will the solar valve being open affect operation of the filtration and cleaning cycles? Or does the pump "know" to not use that solar pipe in those cycles?
As a temporary solution but better than manual, grab yourself a new thermistor and connect it to your solar controller at the pad. It wont work quite as well as with the thermistor at the location of the solar but better than the option of leaving the valve open or manually controlling it.

Thinking thru it a bit more, I would also trace the wire that goes to the roof, I would hazard a guess that the sensor is fine but the wire is broken somewhere. If your lucky it's broken before it reaches the roof 😀
 
So we have a pretty standard setup with a Jandy variable speed pump and rooftop solar. There is a solar actuator valve that turns on and off to allow water flow to the roof. BUT, the rooftop sensor is broken and I've not been able to find anyone willing to go up and replace it.
While putting the sensor near the panels is optimum, it isn't entirely necessary either. You could purchase a new temperature sensor and put it in a location closer to the ground and easier to install but with approximately the same sun exposure as the sensor on the roof. As long as the sun hits the sensor at about the same time as the panels, it will work pretty much the same.
 
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