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13
OVEN THEORY OF OPERATION
Switch (S2) on Oven Fan Motor (M1). The IC then starts the trial for ignition. The OMC P11-1
will also send low voltage to the R1 or the Oven Fan Motor Relay (VFD World, Korea, and Aus-
tralia Only). When R1 closes, line voltage is applied from R1-2 to M1. OMC P11-2 will ground
V2 to open the high flame valve. If the oven is used with an XLT Hood the jumper at Molex Con-
nector (MC3) is removed and +24 VDC is sent to the hood. A relay in the hood will control the
oven operation as long as the LUI had the Remote Switch Function turned on.
Part 2:
AL
- The Ignition Alarm is available on the Australian and Korean models. When the Ignition
Control (IC) goes into ignition lockout and pin1 is grounded the alarm will begin flashing and
beeping. The alarm re24 VDC from the TS2-1 on the master control box and if it is a dual
burner TS3-1 on the secondary box. Cycle power on the oven to reset alarm.
CAP
- The Capacitor is physically mounted inside the Control Box but wired to the externally
mounted M1. The M1 is a Permanent Split Capacitor (PSC) motor. PSC means a capacitor motor
in which the starting capacitor and the auxiliary winding remain in the circuit for both starting and
running. The CAP is a 30.0 uF +/- 6% 370VAC/B 50/60 Hz.
CB
- Circuit Breakers are used to protect electrical components. The current value is printed on the
front of all breakers. If a CB is tripped, eliminate the cause and press the front to reset.
CS
- The Current Sensor detects electrical current (AC) in a wire, and generates a signal propor-
tional to it. The generated signal is analog voltage and then sends it to the OMC. This monitors the
condition of the oven fan motor (Non-VFD Ovens Only ).
FLT 1
- This is an inline filter used in world ovens. The filter is placed in series with the line volt-
age being supplied to the oven. The filter is used to reduce Electromagnetic Interference created by
our equipment and back-feeding it into other appliances. The Electromagnetic Compatibility
(EMC) filter in the gas oven uses capacitors to inhibit direct current while permitting alternating
current. The filters also use inductors which redirect high voltages and high frequencies by dissi-
pating them to ground. Filters should always be grounded to the oven.
FS
- The Flame Sensor consists of a plastic housing and a flame sensor mount. The FS utilizes 24
VDC which originates at TS2-5. When the oven is turned on this terminal receives voltage. The
negative line is supplied via the TS2-9. When flame is present, a blue wire sends a 6.75
μ
A signal
from the connector to IC-10. The minimum flame sensitivity signal to maintain operation is 0.7
μ
A. The sensor visually looks at the flicker rate and the UV characteristics of the flame. If either of
these do not appear the sensor will not send current to the IC. The ignition will continue thru its
process until lockout.
