In this HVAC school short, experts Jim Davis and Jim Bergmann debate the necessity of clocking the gas meter when doing combustion analysis. Jim Davis explains why he doesn't always include it in his protocols, while Jim Bergmann makes the case that meter clocking is vital to account for fluctuations in heat content. Tune in to hear both sides on this key but often overlooked step. Whether you clock the meter or not, this short is sure to provide some helpful perspective.
#hvac #combustion #combustionanalysis #heating
#hvac #combustion #combustionanalysis #heating
We check gas pressure. but yeah, clocking meters is because, uh, it doesn't equate to everything out there if a protocol covers all the equipment fine, but if it's only specific to one, we don't usually include it. I Have a feeling: uh Jim Bergman's going to have a different take I Just want to know if you never clocked them meter Jim How do you know they're off by 10% G Company I'm on the other side of the fence on that because single set of instruction you get from any manufacturer will tell you that you need to clock the meter. Now there's a couple nuances to it.
Jim's right. about a lot of the things he's talking about is you don't know the heat content in any one minute. Which is exactly why you need to clock the meter because if you're tuning it with a combustion analyzer and you don't know whether the heat contents high or the heat contents low if the heat content is low in the gas and you tweak the oxygen and get it on the threshold, now the heat content goes. High The whole combustion can change.
We set a appliance up for average heat content. If you go to the EG website, they'll tell you the average heat content of gas over the year probably stays within about 5% but it it does fluctuate, if literally minute to minute.
Clocking the gas meter is in my opinion not worth the amount of time it takes to perform the task, not feasible in many applications and it takes away from the time spent performing other more more valuable tasks.