So I've had my CB6048 for like 7 years now and love it. I just started a fire today to burn some cardboard and scrap lumber up and noticed that it seems like maybe my pumps aren't working. I'll try to describe my setup:
My stove is outside, 100' away from the house.
The water comes in through 1' PEX and straight into a Taco 007-F5 pump (~3' below ground level)
About 10' later it goes into my forced air furnace heat exchanger.
Then it goes about 50' to another forced air furnace heat exchanger.
Then it comes all the way back again and goes back outside... but that PEX goes by two T's first, right before it goes outside again.
The first T sucks the water through another Taco pump...
Next is a mixing valve...
Then my 4 radiant heat floor loops.
And finally, back out the second T, then it's outside and back to the stove to get reheated.
Today, I got my water up to temp at 185, the PEX is too hot to hold onto for very long as it comes into the first pump and into the heat exchanger. But the Pex coming out of the heat exchanger is barely even warm to the touch... I'll call it room temp! If I shut the furnace fan off, it'll eventually heat up to hot, but as soon as the fan starts to blow past the HX, it cools down to room temp.
Both of my pumps I can feel are vibrating and warm, but I'm not sure how good they're pumping. I replaced both pumps less than 2 years ago. I have bleeder valves going in and out of the HX and they seemed to have no air in them.
Is there a way to tell if they're pumping enough?
Could there be an air bubble in the line somewhere and if so, how do I get rid of it?
Is there a way to manually prime the system somehow?
Nothing has changed in my system in like 5-6 years of great heating.
Any ideas?