SM-26
Jade Range LLC
– A Middleby Company
Titan
TM
Series Heavy Duty Range
Model Series JTRH, JMRH & JTRHE
REVIEW COPY
7
5. Turn thermostat dial back to 325°F and allow
5 minutes for temperature to stabilize.
6. If temperature is less than 20°F different from
the dial setting, calibration is not necessary.
If temperature is more than 20°F different from
the dial setting, calibrate according to the
following steps:
1. Remove dial.
2. Loosen the calibration plate screws until the
calibration plate moves freely. Gently attach
dial and turn until the dial setting matches the
actual oven temperature.
3. Hold calibration plate in place to prevent
movement.
4. Gently remove dial and tighten calibration
plate mounting screws.
5. Replace dial and increase temperature 50°F.
Allow 10 minutes and recheck the temperature.
6. If the temperature is within 20°F of dial setting,
apply adhesive material to the calibration plate
screws.
7. If temperature is still more than 20°F different
from the dial setting, the thermostat may need
to be replaced.
GRIDDLE THERMOSTAT TEST
AND CALIBRATION
NOTE:
Temperature accuracy of the BJWA
thermostat is ±25°F.
The griddle thermostat is a BJWA modulation type.
When first turned on, the flame comes on full. As the
temperature approaches the set point, the flame
slowly reduces in size. When the set temperature is
achieved, the flame should be in bypass.
Bypass flame for griddles should only be big
enough to keep the burner lit all the way around
with little blue dots of flame. This type of thermostat
will allow the temperature to creep if the griddle is
left idling (no product on the griddle), a minimum
of 50°F an hour. Therefore it is imperative that the
bypass flame be set correctly.
CAUTION
If the bypass flame is not correct, the
temperature will creep 100°F to 200°F an hour.
NOTE:
Although the BJWA thermostat is a basic
thermostat, it is somewhat difficult to calibrate
because once the bypass is set, it must be
regarded as in full bypass at the time the
temperature reading is taken. Also, if the
temperature reading is not taken as soon as the
thermostat is in full bypass, the temperature will
begin creeping up and a true temperature reading
will not be possible.
NOTE:
Before attempting re-calibration on the
BJWA thermostat, a temperature check must be
performed from a cold start, before the griddle has
been idling and the temperature has had a chance
to creep up. All temperature readings and/or
calibrations must be performed from a cold start.
Attempting to calibrate the BJWA griddle
thermostat from other than a cold start is extremely
difficult as well as time consuming and can cause
the temperature to be incorrect at a later time.
Figure 32: Griddle BJWA Thermostat
1. Clean the griddle plate to ensure there is no
carbon buildup on the cooking surface. Carbon
buildup will cause a false temperature reading.
2. Remove the temperature dials and manifold
cover as described in PANELS and COVERS.
3. Locate temperature sensor probes under
griddles. Temperature readings can only be
taken directly over the sensor probes.
4. Using a screwdriver from the back of the dial,
push out the center chrome cap of the dial.
Place dial back onto the thermostat.
5. Turn the dial to 300°F. The flame should be
approximately 3/4" to 1" tall. Allow about 15
minutes for plate to heat up.
