hi co reading

ed wallace

I replaced a 75 gallon gas waterheater today after turning it on i noticed back pressuere at the draft hood due to partailly plugged chimney after clearing chimney blockage the co readings went up to 200ppm when the boiler runs no problems vent for waterheater is lower then the boiler vent 1 side of the chimney is on an outside wall any suggestions other then rerouting vent so its higher then the boiler vent

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Brian_24

Where are reading this at? Also what about stack temperature, draft and 02 readings? You may have an air curtain effect going on.
Brian

Ray Landry

In Mass it's code to vent your water heater before your boiler.. almost sounds like maybe the chimney liner is shot, or oversized, and when only the water heater is firing the stack can't get up to temp and causes down drafts... does the chimney ever condense?

ed wallace

hi co

will be going back tomorrow to inspect the chmney during the day was hard to see if it was lined old waterheater had worked for 10 yrs no problem

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lchmb

huh?

It's mass code to vent below the boiler vent going into a chimney?

Mark Hunt

Agree with Brian


What were your other readings AND what was the draft AFTER you cleared the blockage?

Where in the flue were you testing?

When you go back, check those things and let us know. We can fix this together!

AND MOST IMPORTANT.................THANKS FOR TESTING!!!!!!!!!

All the best my friend!

Mark H

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Steamhead

Check the input rate too

it may be a bit high and only producing CO under certain draft conditions.

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ed wallace

high CO readings

did a test using a testo combustion effiency tester 1 st test with boiler off the readings are stack temp 506 degrees 02 6.5 eff 80.4 CO2 8.1 draft 0.00 test 2 with boiler running stack temp 520.7 02 7.0 eff 79.0 CO2 7.8 0.02 chimney is not blocked

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ed wallace

high CO

anyone have any other ideas

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Mark Hunt

Is this a gas boiler Ed?



Mark H

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ed wallace

high CO readings

mark its a bradford white 75 gallon gas water heater

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Mark Hunt

Check your e-mail Ed. (nm)


Mark H

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