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I finally got around to clocking my gas meter for my new boiler, by timing the 1/2 ft dial for 2 revolutions. I came up with 78,127. The boiler is a Burnham ESC4, with an input rating of 91k on the sticker.
The formula I used was:
3600 / 47 (seconds) x 1020 (btu content) = 78,127.
I know the meter is pretty old (25 years at least), and the needle was a little jerky going around, but to be at 91k it would have to make the 2 revolutions in 40 seconds flat.
It would not shock me to find out that the installer didn't verify the manifold pressure per the install manual.
I don't believe it's piping related, as it's a 12 foot straight run to the boiler, 3/4" for 8 feet and 1/2" for the last 4 feet, with 1 elbow and 1 tee along the way. We have a power vented water heater as well (only have 2 gas appliances total).
It seems to fire and heat the house fine, but I'd just assume have it running as designed.
Does it hurt anything to have it under fired in this way, or am I destroying my one year old boiler?
Thanks for any opinions.
Ford Master Technician, "Tinkerer of Terror"
Police & Fire Equipment Lead Mechanic, NW WI
Lover of Old Homes & Gravity Hot Water Systems