Water to feel

The control techniques are the heart of the whole system. No matter if it is a normal or a whirlpool. For the whirlpool, all technique, control and heating is included in the system. For the pool without solar heating, the control technique is quiet simple. The pool pump has to roll around and filter the pool water at least once a day.
Having a pool with solar heating, you indicate a required temperature (desired value). The control technique measures the temperature of the pool water (actual value). If the actual value is lower than the desired one, the control technique opens a valve and starts the solar heating. A part from that, a sun sensor feels if the sun is shining. Because without sun, the water of the pool would only get colder running through the solar system.