SM-25
Jade Range LLC
– A Middleby Company
Titan
TM
Series Heavy Duty Range
Model Series JTRH, JMRH & JTRHE
REVIEW COPY
7
1. Remove kick plate as described in COVERS
and PANELS.
2. Loosen the screw on the air shutter.
3. Light the oven and observe the quality of the
flame.
4. Adjust the air shutter as per AIR SHUTTER
ADJUSTMENT.
5. Tighten screw on air shutter.
6. Install kick plate.
OVEN THERMOSTAT
ADJUSTMENT
Adjustment is very seldom necessary on new
equipment, but older thermostats may require
adjustment. Adjustment should only be considered
when cooking results indicate the thermostat is not
maintaining the set temperature. Before adjusting,
check the temperature with a reliable thermometer.
CAUTION
Only qualified service personnel should perform
thermostat calibrations.
CAUTION
Warranty does not cover thermostats that have
b e e n r e n d e r e d i n o p e r a t i v e b y i m p r o p e r
adjustments and/or calibrations, or by work
performed by unqualified personnel.
NOTE:
If a thermostat has to be replaced, use
extreme care when handling and installing the
sensor probe. Do not kink or severely bend the
probe. Do not allow flame to contact the probe or
the capillary line. Any excess capillary line should
be gently coiled up in an area that is away from
direct flame and/or working or cleaning areas.
Oven Thermostat Test and Calibration
Figure 31: Oven Thermostat
Test and Calibration
A. Calibration Plate Screws
B. Calibration Plate
C. Bypass Screw
NOTE:
Temperature accuracy of the FDO
thermostat is ±25°F.
Both the standard and convection model ovens
use an FDO type, modulating thermostat.
When first turned on, the oven burner flame comes
on full speed approximately 1-1/4" to 1-1/2" tall.
As the temperature approaches the set point, the
flame slowly reduces in size. When the temperature
set point is achieved, the flame should be in
bypass, approximately 1/8" tall. The bypass flame
will keep the oven temperature constant unless
the door is opened and heat is lost.
When the oven needs to recover heat loss, the
thermostat will allow the flame to increase in size
until the temperature is again at the set point.
Usually the thermostat does not require calibration,
but it may need to have the bypass flame set at the
time of installation. The temperature accuracy of
this thermostat is ±25°F.
1. Place the test instrument sensor or
thermometer in the center of the oven cavity
and close the door.
2. Turn the oven on, set the thermostat dial to
300°F and allow the oven to cycle several
times (at least 20 minutes).
3. Turn the thermostat dial back to the lowest
temperature setting.
4. Check the bypass flame; it should be 1/8" tall
and adjust bypass as necessary.
