coalnewbie wrote:Hey, have an idea get an AA boiler and put it on top of a foolproof fire system - I think I will patent the idea. Oh that's right LL make one now.
Rob R. wrote:Maybe I haven't talked to enough AA owners, but my impression is that the Axeman Anderson units don't have nearly the amount of problems with puff-backs as the Coal Guns.
Rob R. wrote:Maybe it's just me, but there is seems to be a lot of variability in the settings required for boom-free operation of the S130 and S260.
lsayre wrote:I was told by my coal supplier that Harmony coal has a bunch more volatiles in it than does Blaschak (and I have no means whereby to verify or refute this), so now that I'm burning straight Harmony I will see if that changes anything. I've been on straight Harmony since September 29th, post my boiler clean-out and re-firing.
lsayre wrote:lsayre wrote:I was told by my coal supplier that Harmony coal has a bunch more volatiles in it than does Blaschak (and I have no means whereby to verify or refute this), so now that I'm burning straight Harmony I will see if that changes anything. I've been on straight Harmony since September 29th, post my boiler clean-out and re-firing.
I've noticed that the intensity of the mild "whoomps" which I've heard almost immediately after the fan motor cuts off has increased, and I've observed that this is not anything related to poor draft, as the manometer indicated that the draft was holding fairly steady at between 0.03" and 0.04" when I most recently observed the phenomenon from a close proximity. I'm now getting more convinced that the reported higher volatile content of the Harmony pea might indeed be a contributing factor, as this is clearly different from what I experienced all last season with Blaschak pea and/or a blend of Blaschak and Stockton pea.
I just opened the sliding cover on the small "air over the fire" window (the small circular opening that resides within the larger oval flapping fire tube port cover) nearly half way (it having been open only a sliver prior to this change), and I've also set back my ashing SV temp from 130 to 120 degrees F.
lsayre wrote:I stood by and watched this morning as the boiler cycled on due to a thermostat call. After it recovered to 180 degrees and the fan cut off there was no hint of a whoomp! All I heard was the soothing crackling of coal, and there was a nice hot and toasty glowing fire visible through the fire tubes view port flapper (whereas yesterday morning after I observed the whoomp sound under similar circumstances all I could see through the flapper was a scant few glowing coals among a sea of black nuggets). One test does not lead to certainty, but it seems that the changes I made may have tamed the Harmony beast, or are at least changes in the right direction.
The only difference between yesterday mornings observed heat cycle and this mornings observation was that yesterday the boiler ashed throughout most of the firing cycle, whereas this morning it only hit its ashing temp. of 110 degrees (10 degrees below the SV set-point of 120) about 2 seconds before achieving 180 degrees and shutting down, so it did not ash.