Beetle-Kill said:
Sorry for the delay, home computer went south again. To answer- flue pipe is double wall, probe is 19.5" above stove top, and the CAT is active. VERY active. After a few hours, the flue temp. had dropped to 100 degrees less than stove top. I was checking it about an hour after closing the by-pass. And yes, the by-pass is closed and locked. Little extra tug to cam it in place.I need to do the dollar bill test again, as the closing wedge on the door handle is aluminum, and I've worn a slight groove in it where it closes against the latch. Door closes very easy compared to new. I may have to machine one out of steel it this continues.
Thanks for the update Beetle, and yes, PC dirt naps happen. The problem-solving here is surprisingly interesting, and I like to hear (read) how it turns out. Sounds like a dollar-bill test is in your future--if you ever shut off your stove.
I'm still trying to get a handle on the cat activity/flue temp relationship. In one of BK's brochures they show a graph of cat temp and internal flue temp 48" above the stove top, for a low-and-slow 48 hour burn. In it the cat temp spikes as high as 1350*, but the flue temp stays at about 200* the whole time, regardless of cat temp. Maybe I'll start another thread asking what folk's experiences with those relative temps are. I sincerely don't know how there can be such a huge difference in those two temps, but of course I know nothing about stove engineering.