Manometer Troubles

Was wondering if anyone can offer any insight to some manometer issues I've been having. Yesterday I hooked up a new to me Hitzer 82-fa. Mano was working fine until furnace started huffing back thru the Baro (operator error which was corrected). Since that, my Mano is all over the place. Unhooked it reads zero. Hooked it goes from reading nothing all the way up to 1.0. Ive checked for blockages and found nothing. Is it possibles that the Mano is broke? Pretty simple device so I'm not sure if that's possible.

Huh..... wish I could help. Maybe you should drain it completely and refill it. I dunno if that would help or not.

Smoke test the baro and all the exhaust pipes to see if you have a draw first. Is C.O. detector working with new battery? Do you have an m.p.d.? Cover baro and check manometer. Do you have Make up air for the furnace room? Try opening a window when appliances are running. Are the 2 appliances hooked to the same chimney? Many questions I know but safety is key! More pic's of the pipes may help us.

Covered Mano with zero change. It is single appliance set up and it's in the basement which is far from air tight. Smoke test did show some draw but Mano worked fine until huffing. Suppose I should drain it and start from scratch.

First pull the tubes and blow thru them to be sure they are clear. Be careful not to force any saliva thru the tube.

I would get rid of the loop in the tubing which acts as a trap.

I think I fixed it. Took the tube out to the shop and blew thru it with compressed air. Hooked back up and working!

philthy wrote:I think I fixed it. Took the tube out to the shop and blew thru it with compressed air. Hooked back up and working!

Cool, I've had mine get clogged in the past when I tried some bituminous coal lol

Thanks for the help guys!