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A Sample KN-8828P Program and It’s Roast
SEG.
TEMP. TIME FAN
1 243 3:00 0
2 297 :01 0
3 333 :01 0
4 351 :01 0
5 369 :01 0
6 396 3:00 1
7 414 3:00 2
8 424 3:00 2
Beans Used - - - - - - - - Kenyan AA
Amount of Beans - - - - - - 250 grams
Line Voltage - - - - - - - - 119.8
Voltage with Heating Element On - - - 116.5
For a better understanding on how a Program affects the roast we present this graph of an actual
sample roast and the program that created it.
The Red Line represents the temperature readout as shown on the LCD display during the roast. The
Blue line indicates the programmed time. The total program time was 12:04, and three “Pluses” were
added, with the beans ejected :15 into the last Plus time period, the beans being manually ejected after a
total roast time of 13:15. This roast was ejected about 0:15 into second crack, which was midway through
the last plus time.
Notice that some of the segments were bypassed by programming them for only :01. Notice also that
the higher fan speeds are used later in the roasting process. This is when smoke production increases and
speeding the fan up will help eliminate smoky fl avors in the beans. Keeping the fan off during the earlier
portions of the roast will help shorten the roasting time by allowing the heat to increase as quickly as pos-
sible.
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Time (minutes)
Display Temperature
Program Temperature
Plus Time