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Homeroasters - Home Roasting Coffee Community » ALL ABOUT ROASTERS » HotTop Roaster

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Hottop KN-8828P-2K - Roasting Profiles
annguyen20	#1 Posted on 02/06/2023 1:57 PM
Newbie Posts: 2 Joined: February 06, 2023	Hi all, I just picked up a Hottop KN-8828P-2K locally and would love any help I can get. Unfortunately, it seems like the B manual would've been the better model, but I'll make do with what was available and deal with adjusting post-roast. It also doesn't look like there's too much information going around for the P model, due to the fact that it was more expensive in the manual and only featured 7 extra preset profiles, which no one uses anyway. While waiting for my green beans to arrive, I wanted to prepare myself for my first roast ever. I have 5 lbs of Bali, Costa Rica, 3 lbs of Ethiopian, and 2 Colombian. Thinking about starting with the Costa Rican since it was less than $5/lb at HappyMug (6.25/lb average for all with shipping). Do we like HappyMug here for the price, or is there another green bean supplier that is better? Lastly, do we know what grade beans HappyMug uses, vs SM? Anywho, it looks like Hottop has the following guide for a full city roast/city+. I'm sure I'll likely be more full city+ at the start, but can dial it in and drop it based on timing after the first couple of roasts. I believe 242.6f is the highest it'll go before the next segment begins. Full City Roast - 297 charge 1m0s at 242.6f, 0 fan 2m0s at 297f, 0 fan - add beans here 1m0s at 311, 0 fan 1m30s at 311f, 1 fan 1m30s at 340f, 1 fan 2m0s at 370f, 2 fan 2m30s at 394f, 3 fan 2m0s at 401f, 4 fan Manually eject immediately right before 2nd crack, which sounds like it's easier said than done. Seeing this setting, I've played around with another profile to try and hit the recommended drop of 335, essentially extending the drying period at 297f. Full City(?) Roast - 335 charge 30s at 242.6f, 0 fan 1m0s at 335f, 0 fan, add beans here 3m0s at 297f, 0 fan 1m15s at 311f, 1 fan 1m30s at 340f, 1 fan 1m30s at 370f, 2 fan 1m30s at 390f, 3 fan 2m0s at 401f, 4 fan I fully admit this is totally experimental and may completely fail, but figured my first roast should be at the manufacturer's recommended setting and then go to the other extreme and adjust from there. Overall, how's the profile look for a Costa Rican? Any glaring issues?


renatoa	#2 Posted on 02/07/2023 1:09 AM
Administrator Posts: 2744 Joined: September 30, 2016	From what I seen to other people, you could be more lucky if charging to the maximum you can get, i.e. 400F/200C, and have a minimal fan, like 1 from the start. Not personal experience, though, but for any design I am inclined to favor even minimal convection roasting more than the so called "contact" roasting, i.e. no fan at all.


annguyen20	#3 Posted on 02/08/2023 2:32 PM
Newbie Posts: 2 Joined: February 06, 2023	Quote renatoa wrote: From what I seen to other people, you could be more lucky if charging to the maximum you can get, i.e. 400F/200C, and have a minimal fan, like 1 from the start. Not personal experience, though, but for any design I am inclined to favor even minimal convection roasting more than the so called "contact" roasting, i.e. no fan at all. Appreciate the response! I'll try the standard profile, and then try to charge to the max as the other extreme and test it out. Is the profile pretty good after that? Try to keep it at 297 for 3-4 minutes at 0 fan?

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