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ELECTRIC COMBI OVEN - ELECTRICAL OPERATION
Page 42 of 68
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)
KM1 + KM2 + KM6 + KM7 ..... (10 & 20 level)
Convection mode, half power and half speed cavity fan(s) = KM1 + KM6 ........................... (6 level)
KM1 + KM7 ........................... (10 level)
KM1 + KM6 + KM7 ................ (20 level)
Steam mode, full power and full speed cavity fan(s) = KM1 + KM2 + KM3 ................ (6 & 10 level)
KM1 + KM2 + KM3 + KM5 ..... (20 level)
Steam mode, half power and half speed cavity fan(s) = KM1 + KM3 ........................... (6 & 10 level)
KM1 + KM5 ........................... (20 level)
Heating Regulation
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.