Wood Boiler connection to Weil McClein Boiler

dlaprad1014

I have a wood boiler plumbed ready for use. I need to make my final connections to my Weil McClein oil burner. I am connecting to the return manifold and the supply manifold of the furnace. Do I need to install shut off valves on the manifolds so the water does not circulate thru the furnace. Or is that normal for the water to travel thru the oil burner

Ironman

Is the wood boiler pressurized? If not, are you using a heat exchanger?

lchmb

you should have a water to water heat exchanger. This should be fed to your water heater first then boiler second. This way if something happens with your wood boiler your house system can take over. You cannot tie the wood boiler directly into your oil system.

dlaprad1014

Yes I have a heat exchanger. Sorry I did not specify that. So the feed and return lines from the heat exchanger to my existing oil boiler will flow thru the boiler? I will only need to turn down the temperature on the boiler.

hot_rod

The best piping is parallel. You really don't want to heat the wood fired unit with the fossil fueled boiler. Some good piping drawings and concepts here.

https://www.caleffi.com/sites/default/files/coll_attach_file/idronics_10_0.pdf

dlaprad1014

Here’s a picture of what I’m trying to explain. I have my supply and return coming off my oil boiler. I also have my supply and return from the heat exchanger. I’m the picture the blue line is my cold return to oil boiler. Red lines is the hot supply line. I have 2 zones in my house plus the hot water tank. Now I’m tying into those 2 manifold lines with the heat exchanger. Now do I use the existing oil furnace as part of the system, so the water continues to travel thru the furnace. And I just turn down the temperature on it so it won’t fire?

Ironman

I'll send you a diagram this afternoon.

Ironman

@dlaprad1014
I sent you a p/m.