Hi, I’m totally new here and I’ve been trying to search for this information but failing to find it so please if it is available out there sorry I can’t find it. I recently purchased a used American harvest 6500 model pellet furnace. I’m trying to adjust some of these many setting on the control board. I was looking to some advice on the C setting and where they all should kinda be set up at from the factory setting for best burn. Also this is day three of messing with this stove and I seem to be getting a lot of black unburnt pellets filling my fire pot and with an over night burn when I wake up that’s all it is. And it burning throw bags and bags of pellets even on a pellet rate setting of 2. I’m been messing with manual slide damper and also the draft fan setting and it seems the only way I can get it to burn kinda of is if it’s set at 9 and my pellet rate is on 2 and manual damper slid out about an inch. Any info on setting this thing up will be appreciated and once again sorry if this has been discussed Several times I can’t seem to find setting for the 6500 only for the 6100 and other lower models.