Trying to get my head around this system in our cafe. It's the relationship between the circulating pump and the ?bypass (above the red knob on the right) that is not making sense to me.
It just seems like the circulating pump is dragging the cold water around and around through the loops. It's doesn't look like other manifolds I've googled...
Realistically, at this point you call s professional and get it checked out and explained to you.
I've tried. We're rural and tradies just don't want to know.