Southbend X560DD S536A - Manual (Page 28)

S ERVICE 500 S ERIES R ESTAURANT R ANGES
P AGE 28 OF 48 O WNER ’ S M ANUAL 1188716 (09/07)
C
ALIBRATION OF
O
VEN
T
HERMOSTAT
The oven thermostat control is carefully calibrated at the factory so that its dial settings closely match actual oven
temperatures. Field recalibration is seldom necessary, and should not be resorted to unless considerable experience
with unexpected cooking results definitely proves that the control is not maintaining the temperatures to which the dial is
set.
When checking the oven temperature, use a test instrument or a reliable mercury thermometer positioned in the center
of the oven. The oven bottom must be in place. For convection ovens, the blower baffle must be in place.
Proceed as follows (see Figure 13 on page 29):
1. Turn the Bypass Screw clockwise all the way in to the OFF position (a very small bypass flame may be visible.)
2. Check that the thermostat knob is in the OFF position.
3. Place a thermocouple (temperature probe) in the center of the top rack.
4. With the oven empty (other than the rack and thermocouple), light the oven pilot and turn the thermostat to the
350°F (175°C) setting.
5. Allow the oven to heat until its temperature stabilizes. (Make sure the bypass flame is off or very low at this time.)
6. If the temperature of the thermocouple is not within 15°F (8°C) of the set point (350°F or 175°C), remove the
knob and turn the screw in the center of the thermostat in very small increments. Turn the screw clockwise to
lower the temperature, or counterclockwise to raise the temperature.
7. Allow the oven temperature to stabilize again.
8. Repeat Step 6 as necessary until the calibration is within 15°F (8°C) of the set point (350°F or 175°C).
9. Reinstall the thermostat knob.
10. Turn the thermostat knob down until the set point is between the first two marks after the OFF position.
11. Turn the Bypass Screw counter clockwise until the bypass flame is about 3/4 inch (19 mm) high. (The flames on
both sides of the burner should be starting to touch above the burner.)
Note: The high bypass on Southbend cafe ranges will not allow the range temperature to run away.
A DJUSTMENT OF T HERMOSTATIC G RIDDLE B YPASS F LAME L EVEL
When the griddle reaches the temperature at which the dial is set, the control cuts down the flow of gas to the amount
required to keep the griddle at that temperature. Always, however, the control must bypass enough gas to keep the
entire burner lighted. To maintain this minimum flame, the bypass must be set carefully and accurately, as follows (see
Figure 13 on page 29):
1. Light the burner, then turn dial FULL ON.
2. After 5 minutes, turn dial clockwise to point slightly beyond first mark on dial.
3. Remove dial and bezel.
4. With a screwdriver, turn Bypass Adjustor (counterclockwise to increase the flame, clockwise to decrease it) until
there is a minimum flame over the entire burner.
5. Replace bezel and dial, turning the dial clockwise until it locks in the OFF position.
C ALIBRATION OF T HERMOSTATIC G RIDDLE T HERMOSTAT
The griddle temperature control is carefully calibrated at the factory—that is, it is so adjusted that dial settings match
actual temperatures. Field recalibration is seldom necessary, and should not be resorted to unless considerable
experience with cooking results definitely proves that the control is not maintaining the temperatures to which the dial is
set.
Recalibration should not be undertaken, however, until the griddle bypass flame has been adjusted (see previous
subsection).
To check temperatures when recalibrating, use a test instrument with a DISC type thermocouple for surface temperature
checking. Drop a couple of drops of oil on griddle surface plate and place thermocouple disc flat into the oil.
Proceed as follows (see Figure 13 below):
1. Remove dial and push out metal insert.