Can someone give me a rundown of how this system works or how it is wired? I see the relay box behind the electrical panel. I’m half blind and have trouble reading it. But it looks like it’s rated for 25A. I assume that’s the switched load rating. My schematics don’t show how this system is wired, but when my AC turns on, that relay adds very little current draw. Is it providing 120V to the water pump? Is it safe to assume that pump pulls little power?