Outdoor Wood Furnace Info

All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: Pointblank on August 23, 2015, 09:09:52 AM

Title: Thermostatic bypass valve and freeze protection
Post by: Pointblank on August 23, 2015, 09:09:52 AM
In my search for a replacement to my 5648, I've noticed most manufacturers now require a thermostatic bypass to be installed. The way I understand this is it will close at 150 degrees and recirculate the water back to the boiler. If this is the case,  it seems I will loose the freeze up protection I now have when my propane furnace comes on. 

Am I understanding this correctly? If so, any other options other than antifreeze for freeze up protection?
Title: Re: Thermostatic bypass valve and freeze protection
Post by: slimjim on August 23, 2015, 10:24:22 AM
There are better ways to accomplish both desired tasks but I'm not sure if CB would approve.
Title: Re: Thermostatic bypass valve and freeze protection
Post by: hondaracer2oo4 on August 23, 2015, 01:45:46 PM
Can't you just put the bypass valve inside the house? That should solve your freeze up issue.
Title: Re: Thermostatic bypass valve and freeze protection
Post by: boilerman on August 23, 2015, 05:27:37 PM
The thermostatic valve is installed in the house and it does not close to 100%. Even if water drops below 150 degrees it allows enough water through to accept back feed heat from the in house coil in the now backup forced air system or a plate exchanger to keep lines and outdoor boiler from freezing.
Title: Re: Thermostatic bypass valve and freeze protection
Post by: Pointblank on August 23, 2015, 06:55:26 PM
The thermostatic valve is installed in the house and it does not close to 100%. Even if water drops below 150 degrees it allows enough water through to accept back feed heat from the in house coil in the now backup forced air system or a plate exchanger to keep lines and outdoor boiler from freezing.

OK cool, good to know.   :thumbup:
Thanks!