dchartt wrote:I would like to know if there is anyone out there who ran there s130 in milder weather like 40 to 60 degrees without having large amounts of unburnt and partially burnt coal?
Since lowering the SV on the thermo ash controller to 120 in warmer weather I have had essentially no unburnt or partially burnt coal and the puff backs stopped also.
I think that maintaining the correct thickness of the fire bed is critical to correct operation of the AHS boiler--too thick a fire (too thin a bed of ash under the fire) and the puff backs occur.
I also think--based on the varied experience posted on this board--that there must be significant sample to sample variation between different AHS boilers and the SV of the thermo grate controller that yields a satisfactory thickness of the fire. I found that I needed to go down to the minimum value allowed (120) with the standardard AHS programming of the controller to stop the puff backs while I note others post satisfactory performance with a SV of 130 or even higher.