Keyser

Please forgive me for my ignorance on the issue. I have e new house with a pool/spa combo and I am not exactly sure how to work it. We had a pool guy come out and said everything was ok and he kind of explained how it worked but like an idiot I really wasn't paying too close of attention. Can someone explain which valves need to be turned to heat the spa. I have added some pictures with numbers so it can be explained easier. Thanks for your time!