Vulcan-Hart 126172, Service Manual

Page: 52 / 68

ELECTRIC COMBI OVEN - ELECTRICAL OPERATION
Page 52 of 68
1) Drain cool down solenoid energized.
NOTE: Whenever steam generator
heating elements are on, the drain cool
down solenoid is energized.
G. Cavity fan motor(s) energized.
3. Press the temp key to set the operating
temperature (the last temperature that was set
is displayed; adjustable range is 35 to 518°F).
The temperature symbol (°F or °C) will flash in
the temperature display to indicate the cavity
set point temperature can be adjusted.
A. Rotate the adjustment knob clockwise or
counterclockwise to adjust the setting
(temperature symbol stops flashing).
1) If a pause of 5 seconds is made
during or at the end of the
adjustment, the temperature symbol
will begin to flash. When the
temperature symbol stops flashing,
the temperature can no longer be
adjusted and the cavity set point
temperature is displayed.
NOTE: To display the actual cavity
temperature for 5 seconds, press and hold the
temperature key.
4. Oven control monitors cavity temperature and
cycles the convection heating elements as
necessary, to maintain set point temperature.
Steam generator heating elements cycle as
described in “COMBI MODE” under “STEAM
REGULATION”.
A. The operating temperature remains as
entered unless the operating temperature
is changed.
Add the steps outlined in the two cooking methods
below to the heating mode sequence (convection,
steam or combi) for time and temperature probe
operation.
TIME METHOD
NOTE: Assume heating mode and operational
temperature already selected.
NOTE: Timed method can not be used in
conjunction with temperature probe method.
NOTE: Timed method does not affect oven
operation. i.e. contactors, heaters, cavity fans etc.
1. Press the time key.
A. Time LED and dashes ( - -:- - ) flash in the
time display.
2. Rotate the adjustment knob clockwise or
counterclockwise to the desired cooking time.
Time display will be continuous but the time
LED will continue to flash.
A. Once the time is set, it will flash in the
time display for 5 seconds then display the
selected time.
3. Press the Start key to begin the “timed” cooking
cycle.
A. Start LED on.
B. Timer counts down.
NOTE: As the cooking time counts down, the
colon between hours and minutes in the time
display will flash.
NOTE: Time can be adjusted throughout the
cooking cycle by pressing the time key and
rotating the adjustment knob. The adjusted
time is retained in memory and is displayed
when the time key is pressed.
4. Cooking time expires, time display flashes and
buzzer sounds.
A. Press the Start key to silence buzzer.
1) Start LED off.
5. The cooking time remains as entered and is
displayed in the time display.
TEMPERATURE PROBE METHOD (DELUXE
MANUAL CONTROL ONLY)
Refer to the Installation & Operation manual for an
explanation of temperature probe cooking.
NOTE: Assume heating mode already selected.
NOTE: Temperature probe method can not be used
in conjunction with timed method.
NOTE: Timed method does not affect oven
operation. i.e. contactors, heaters, cavity fans etc.
1. Press the probe key.
A. Time LED off.
B. Probe LED and dashes ( - -:- - F ) flash in
the time display.
C. Probe set point temperature is displayed in
the time display (the last temperature that
was set). Default is 140°F; range is 70-
210°F.
NOTE: Probe temperature will display a maximum
of 210°F or 2°F lower than the cavity temperature.
NOTE: If the probe temperature is not displayed,
see “TROUBLESHOOTING” section for details.
2. Rotate the adjustment knob clockwise or
counterclockwise to adjust the setting
(temperature display will not flash).
A. Once the adjustment is made, the
temperature display flashes for 5 seconds
then displays the selected set point
temperature.