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Lochinvar Noise
bethbrownlow
Member Posts: 2
in Gas Heating
My Lochinvar boiler makes a foghorn noise when heating up. Is there a part which requires cleaning to prevent the vibration-generated noise?
0
Comments
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What model Lochinvar is it?
Some of their high efficiency models will make that noise if the combustion is not correctly tuned."If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
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My Lochinvar Model number is WHN155.0
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Again, a QUALIFIED tech with a digital combustion analyzer. The throttle needs to be adjusted to allow the highest Co2 level allowed in the manufacturer's instructions.
If there's CSST (flex) running to the boiler, that will also cause it.
Try having the combustion adjusted as outlined above. If that doesn't fix it, have the CSST replaced with the next largest size or re-piped from the boiler back with black iron for 10 feet.
The CSST causes a harmonic issue with negative pressure gas burners like yours. I've post previously in detail about this.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.1 -
I've also heard the foghorn, caused when the exhaust pipe is not sloped properly and water collects in the flue. Check your slope and make sure all the piping slopes back to the boiler.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
@bethbrownlow did you get your issue fixed?DIY'er ... ripped out a perfectly good forced-air furnace and replaced it with hot water & radiators.0
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