Service manual

10
R-1855A
: AIR FLOW
: AIR FLOW
: AIR FLOW
the relays to the power transformer and fan motor. The
LSI also stops counting down and closes the damper
door so that no fresh air will enter the oven cavity.
3. Once the fire sensor feature has shut the unit down, the
programmed cooking cycle may be resumed by pressing
the "START" pad or the unit may be reset by pressing the
"CLEAR" pad.
IMPORTANT:
During sensor cooking operation, the fire sensing
operation sequence will not begin until the AH sensor
has detected vapors and initiated a sensor cooking
cycle. This is because the operation of the convection
fan would interfere with the AH sensor's vapor detec-
tion.
CONVECTION
MOTOR
THERMISTOR
Sensing
Voltage
ON
OFF
ON
OFF
ON
OFF
0 2 24 30 64 (sec.)
3 sec.
Sensing the voltage across the temperature measurement circuit.
6 sec.
3
32 (sec.)
VENTILATION METHODS HOT AIR EXHAUST
1. VERTICAL VENTING
For this venting method, hot air rising from the
conventional range below is drawn in by the hood fan
motor through the grease filters at the right and left sides
of the base cover, up through the right and left side intake
ducts, then discharged vertically at rear center top of the
oven, into the customer's vent system.
2. HORIZONTAL VENTING
The air handing is same as VERTICAL VENTING except
that the final air discharge is directed horizontally out
from the top rear of the oven into the customer's vent
system.
3. RE-CIRCULATION (INSIDE VENTING)
The air handing is same as VERTICAL VENTING except
that the final air discharge is directed horizontally
through the upper front of the oven into the kitchen. IN
this case, the accessory charcoal filter lit RK-220 must
be provided to filter the air before it leaves the oven.
GREASE
FILTER
HOOD
INTAKE
DUCT R
HOOD FAN MOTOR
TO DUCTTO DUCT
GREASE
FILTER
HOOD
INTAKE
DUCT R
HOOD FAN MOTOR
TO DUCT
HOOD
INTAKE
DUCT R
HOOD EXHAUST
LOUVER
HOOD FAN MOTOR
CHARCOAL
FILTER