B.
If 120 VAC is present, component is
functioning properly.
5.
Reassemble oven and check for proper
operation.
COMPUTER CONTROL
CALIBRATION (SG4C/SG6C)
Certain procedures in this section require
electrical test or measurements while power is
applied to the machine. Exercise extreme caution
at all times. If test points are not easily accessible,
discern power, attach test equipment and reapply
power to test.
Calibration Steps
1.
Place a thermocouple in the geometric center of
the oven cavity.
2.
Set the ON-OFF-COOL DOWN switch to ON.
A.
If the set point temperature is 350°F,
proceed to step 4.
B.
If the set point temperature is other than
350°F, proceed to step 3 to change the
temperature.
3.
Press the set key then temperature key to enter
the temperature set mode.
A.
The display will alternate between the term
StPt (set point) and the current oven
temperature setting.
B.
Press the UP or DOWN arrows to make the
proper selection.
C.
Press the set key again to save the change,
then exit the temperature set mode.
4.
Allow the oven temperature to stabilize (normally
three cycles).
5.
Compare the controls set point temperature to
the thermocouple meter reading when the heat
light goes out.
A.
A temperature variance more than 5°F
indicates an adjustment is needed.
1)
To make the adjustment, proceed to
step 6.
2)
If temperature variances is less than
5°F, then the computer control is
functioning properly.
6.
Enter the setup mode as outline in Setup Mode
under Computer Control (SG4C/SG6C).
A.
Advance through the menu until CAL1
(calibration offset) appears.
1)
If the thermocouple reading is higher
than set point temperature, press the
down arrow key and enter a negative
offset value that is equal to the number
of degrees above the 5°F tolerance.
2)
If the thermocouple reading is lower
than set point temperature, press the
UP arrow and enter a positive offset
value that is equal to the number of
degrees below the 5°F tolerance.
3)
Exit the setup mode.
7.
Allow the oven to cycle at least two times
between adjustments.
A.
If the temperature variance still differs more
than 5°F from the set point, verify the correct
calibration offset value was entered and
retained.
1)
Adjust the calibration offset value as
outlined in step 6, until the cycling
temperature is within tolerance.
B.
If the above adjustment cannot be obtained,
replace the computer control and check for
proper operation.
GAS PRESSURE ADJUSTMENT
Certain procedures in this section require
electrical test or measurements while power is
applied to the machine. Exercise extreme caution
at all times. If test points are not easily accessible,
discern power, attach test equipment and reapply
power to test.
Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.
Accurate gas pressure adjustments can only be made
with the gas on and the burner lit. If the incoming line
pressure to the valve is less than the minimum stated,
then the manifold pressure cannot be set correctly.
1.
Turn gas supply off at manual shutoff valve.
2.
Remove the right side panel as outlined under
Covers and Panels in Removal and
Replacement of Parts.
SG4 & SG6 Series Full Size Gas Convection Ovens - SERVICE PROCEDURES AND ADJUSTMENTS
F35626 Rev. B (1118)
Page 30 of 56
