Outdoor Wood Furnace Info

All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: caper on December 01, 2018, 04:39:59 PM

Title: loops slow to heat
Post by: caper on December 01, 2018, 04:39:59 PM

Hello everyone, advice needed, furnace on for last 2 weeks, rads appear to be slow to heat up as well with in floor , but I can notice the rads as I can actually see whats going on with them, pump just replaced and ive bled the loops thru the return taps a few times and each have no air in them, im puzzled, my main loop takes approx. 40 mins for the cast rads to become hot, in the past, it was immediately or close to it, any suggestions, not the pump , no air ..mmmm puzzled.

Title: Re: loops slow to heat
Post by: smithbr on December 01, 2018, 08:11:51 PM

Are you sure you have flow in the system (I know, you replaced the pump, but...).  Does your return leg take that long to heat up at the furnace?  If it heats quickly, that would indicate your flow is good, and somehow the loops are bypassed.  If it doesn't, you may still have little flow.  (why did you replace the pump?  Is there a hint there?) 
Perchance is there a bypass you've left open?  My system installer put in a bypass so we could completely disconnect the floor system if we wanted.  Maybe you have something similar?

Title: Re: loops slow to heat
Post by: RSI on December 01, 2018, 09:57:31 PM

If not airlocked and pump is working then maybe plugged heat exchanger.
Do you have a filter or maybe a valve partially closed?

Title: Re: loops slow to heat
Post by: E Yoder on December 03, 2018, 02:03:09 AM

Need some more details on how its plumbed. It could have air at a high spot somewhere that needs to get pushed through.
Pictures?