ELECTRIC COMBI OVEN - ELECTRICAL OPERATION
SEQUENCE OF OPERATION
The convection and steam heating theory outlined below, covers the programable and manual oven controls unless otherwise stated.
Heating Mode and Cavity Fan Speeds
KM1 = 1/2 power and full speed cavity fan(s).
KM2 = 1/2 power and half speed cavity fan(s).
KM1 + KM2 = Full power and full speed cavity fan(s).
KM3 and KM5 = Steam mode regulation (KM5 on 20 level only).
KM6 and KM7 = Convection mode regulation.
Convection mode, full power and full speed cavity fan(s) | = | KM1 + KM2 + KM6 | (6 level) |
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| KM1 + KM2 + KM6 + KM7 | (10 & 20 level) |
Convection mode, half power and half speed cavity fan(s) | = | KM1 + KM6 | (6 level) |
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| KM1 + KM7 | (10 level) |
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| KM1 + KM6 + KM7 | (20 level) |
Steam mode, full power and full speed cavity fan(s) | = | KM1 + KM2 + KM3 | (6 & 10 level) |
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| KM1 + KM2 + KM3 + KM5 | (20 level) |
Steam mode, half power and half speed cavity fan(s) | = | KM1 + KM3 | (6 & 10 level) |
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| KM1 + KM5 | (20 level) |
Heating Regulation |
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When the oven begins heating, the convection elements are on at full power until the cavity temperature reaches 18°F below set point temperature. If the cavity temperature is rising at 3.6°F per second or greater, the heating elements will turn off. If the cavity temperature does not reach set point or drops more than 18°F below set point, the heating elements turn back on at full power until reaching the actual cavity set point temperature then turn off. When the cavity temperature drops 0.9°F below set point, the heating elements turn on at 1/4 power (one element - 3 sec on, 4 sec off) until cavity temperature returns to the actual set point then turn off. The oven continues to operate (cycle) at 1/4 power as long as the set point temperature can be maintained. If the cavity temperature drops 2.7°F below the set point, the heating elements turn on at 1/2 power (one element on) until cavity temperature returns to the actual set point then turn off. If the cavity temperature drops more than 5.4°F below the set point, the heating elements turn back on at full power until cavity temperature reaches 1.8°F below set point. At 1.8°F below set point, the heating elements turn on at 1/4 power (one element - 3 sec on, 4 sec off) until cavity temperature returns to the actual set point then turn off.
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