Lightning wrote:I assume you are using the Dwyer Mark II model 25 right? CoalKirk is right. We set these up "backwards" so that negative pressure is read on the positive side of the scale.. That way there is more available scale to read since it goes higher than we'll ever need.
I have the baro hooked up with 1/4" copper tubeing to about 2 ft from the meter on the wall behind it. I reversed it like yours. With a good fire going this morning..(35 deg's out here) It is reading at the blue arrow in your picture. The Fields control is open about 2 inches. If I force it open all the way the red oil goes up the tube to 7 or 8 the most.
What do you think? Harman says to be -.06 to -.08 at the flue. Wouldn't that be above the blue arrow and if so I should adjust the baro to open more ? Or maybe it's time to try closeing the combustion flap a little.