I just installed a brand new 36 kw electric boiler. 240v, 3 ph, works good, more expensive to operate than I had hoped...regardless when the power/circuit breakers are on, the contactors energize/close always. Why? That makes no sense to me. What’s their purpose if always energized. Why not bypass them and save the 24v transformer life and cost to power it. I checked the schematic, it is designed that way. Gladly I turn the breaker off in the non- heat season. To further explain, even when there is no demand, the contactors are closed, only the relays energize upon demand. I don’t understand - do you? If so, please explain. Peace n thx!