Dunkirk Steam Boiler Main vent question

Stewy_2

that Im about to install and it says put the main vent 15" back form the vertical pipe that meets the wet return on the dry return. Is this the best way to do a vent? I thought that 15" back from the end of the main was optimum?

Also if anyone has any suggestions on how to get the best from the system, I'll take em' (ie dropped header, 3" instead of 2.5" etc.)

Jim Franklin

I think they're talking about the same thing. That's how I read it.

I also have a Dunkirk, an Empire. You can't do much better than following the manufacturer's instructions. A drop header is nice and will improve steam quality, but isn't necessary. Proper venting and pipe insulation is better than a drop header in my opinion, but if you're starting from scratch and have the scratch, go ahead and do the drop, it isn't much more in $ or labor (and depending on your perversions, could be fun). The header should be greater than or equal to the mains in size. I went with 3" header on 2" mains and risers.

jim

Steamhead (in transit)

The manufacturer's diagram

shows the minimum pipe sizes and configuration that will work. Going to a higher level, such as increasing the header size and dropping it, will make the system work much better.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Unknown

Questions on the Drawing

I'm new to steam heating and after I looked over these installation drawings some questions came to mind. While obviously one should follow the manufacturers instruction I'd really appreciate the steam expert's design thoughts.

1.On this drawing on the Hartford loop they specify 6 inches below the water line to where the return joins.. on most others I notice it is only 2 inches below the waterline ...Thoughts?

2.On the drawing the fresh water feed is located close to the return port on the boiler... on others I've noticed that this line is located on the return pipe before it enters the hartford loop...thoughts? It would appear`to me that there would be less chance of thermal shock locating the cold water feed farther away from boiler?

3. Insulation - how far down from the header on the equalizer pipe is it advantageous to place insulation?
Thanks for you help