Manometer Reading Changed

paulsferg · Post by **paulsferg** » Mon. Feb. 10, 2014 9:13 pm

when I fired up for the season I left the manometer where it was last year.then I noticed was only reading about 2.i adjusted to read about 4 to 4.5.whent down to check on things last night and it was reading over 10.readjusted back to 4.5 and it now sits where it was last year.any ideas why it changed so much in one day?running a 520 efm highboy boiler.

Carbon12 · Post by **Carbon12** » Mon. Feb. 10, 2014 9:22 pm

The oil has been know to evaporate. Did you disconnect the tubing, check for level and re zero? I assume you mean -.04

paulsferg · Post by **paulsferg** » Mon. Feb. 10, 2014 9:39 pm

checked fluid level and zeroed out,level good .seems fine just don't know why the reading changed

Carbon12 · Post by **Carbon12** » Mon. Feb. 10, 2014 9:43 pm

Has the boiler and smoke pipe been cleaned recently? Windy yesterday?

paulsferg · Post by **paulsferg** » Mon. Feb. 10, 2014 9:47 pm

boiler was cleaned prior to start up in october.usually go till spring shutdown before cleaning.never had a problem before.no wind yesterday

paulsferg · Post by **paulsferg** » Mon. Feb. 10, 2014 9:50 pm

baro damper is maxed out now.if the pipe was plugged it would be just the opposite,not enough draft.right?

Carbon12 · Post by **Carbon12** » Mon. Feb. 10, 2014 9:57 pm

Yes, if blocked the reading would move towards zero or positive, depending on where you measure. If Baro is maxed out, the chimney must really be drawing well,...too well! Was it windy when the measurements went wacky?

paulsferg · Post by **paulsferg** » Mon. Feb. 10, 2014 10:04 pm

nope no wind I live on the biggest hill around but yesterday was quiet

Post by **Lightning** » Tue. Feb. 11, 2014 3:15 am

If the baro door opened a significant amount that would indicate a strong draft. It would likely be caused by extreme cold or a steady wind, if it continued for a period of time. A gusting wind would cause it to flop around some.

paulsferg wrote:when I fired up for the season I left the manometer where it was last year.then I noticed was only reading about 2.i adjusted to read about 4 to 4.5.whent down to check on things last night and it was reading over 10.readjusted back to 4.5 and it now sits where it was last year

What are you adjusting? The weight on the baro door??

titleist1 · Post by **titleist1** » Tue. Feb. 11, 2014 6:44 am

What you are describing seems like there could be air getting past a gasket on the stove somewhere. Have you checked all the gaskets?