Can someone help me with my dilemma? I have a Pentair Intelliflo pump (as well as a cleaner booster pump) that feeds my pool/spa combo. The freeze protection (to protect the pump) kicks on at 35 degrees Fahrenheit. That sends water through the system (including through a spa return that spills into the pool). Lately we've had a lot of temps down below 36 degrees and it lasts for days. Anytime that happens I can't heat my spa because the valves default to the pool setting. Sometimes we're actually in the spa when it starts pumping 40 degree pool water in.
My questions are 1) Do I need to keep water running through the pool plumbing (including two wall mounted scuppers) to keep the pipes/pool from freezing? And 2) if not, can I switch the auto valves so that when the freeze protection kicks on it only circulates through the spa system and then I can turn the heat on. This would cut off all the pool plumbing and water features but I got the spa in large part for winter use of the pool. It seems every night and many days the temps are too low to enjoy it. Finally, if doing this is acceptable, how do I position the Jandy auto valve switches to make it happen? Do I just flip them to the opposite positions?