Recently I believe I had a air lock in my water system. Reason for this thinking was that my air/water exchanger was not all completly hot, when the fan would kick on, the only hot part of the exchanger was in the center (18x18) veins. So thats why I thought maybe airlocked. I first back flushed my system, but didnt really notice a difference. I had a brandnew B&G 22 pump, read that it had a little gpm then my 007, so replaced the 007, no differance. I thought well maybe the exchanger was plugged, so got a good deal on a new one, installed it this weekend, and I believe its alot better, but still the hot side in is very hot, and the exit side is almost as hot. Now the fan kicks on, and in a few minutes the exit side is very cool to the touch, center and enter side hot. You can hold you fingers on probably the top (return) 5 rows of tubes, actually cool to the touch.
When I intalled the exchanger, got all the air out etc. I think, could be wrong, even when the fan is pulling air thru the exchanger it should still be fairly warm to the touch, on the return top tubes.
So what are my options, bigger pump? Or maybe slow the return down somewhat, keep the hot water in the exchanger a few seconds longer.
My exchanger is mounted to the furnace, in and out lines come up thru the floor, goes thru the exchanger, then back down to the stove.
Stove is probably 130 feet from furnance, then it goes 50 feet to polebarn, which is just a loop for now. The entire loop (didnt relize it was this many Feet)from stove back to stove is roughly 388+ or - feet, that with the rising to the sidearm, furnace, and in the polebarn. Thanks for any help.