Thermcraft XOV-21-21-19.5-1A-2-SL - Manual (Page 8)

OPERATION
6.1 Connection to Power Supply: Assure that the electrical power supply is properly
configured and rated for the oven and plug the unit cord into the receptacle.
6.2 Push the main power switch to the On position. The digital temperature display will indicate
a temperature value. Turn the Overtemperature Safety Thermostat to its maximum position,
clockwise using a coin or flat head screwdriver.
6.3 Set The Main Temperature Control: To enter the desired set point temperature, press
either the UP or DOWN arrow pad one time on the SET/TEMPERATURE digital display.
The display will start to blink from bright to dim. While blinking, the display is showing the
temperature set point which can be changed by pushing the UP or DOWN arrow pads to
raise or lower the value. If the arrow pads are not pushed within five (5) seconds, the
display will stop blinking and return to read the chamber temperature. Allow several hours
for the temperature to stabilize.
6.4 Calibrate The Main Temperature Control: It is recommended that display is calibrated
once the unit is installed in its working environment and has been stabile at set point for
several hours. Place a reference thermometer through the damper tube at the top of the
unit adjacent to the exhaust port. Be certain the thermometer does not touch any shelving.
Allow again for the temperature to stabilize until five (5) consecutive readings at one minute
intervals show no temperature change. Compare the reading on the reference thermometer
with the digital display. If there is an unacceptable difference, put the display in calibrate
mode by pressing the UP and DOWN arrow pads at the same time until the decimal points
blink on and off. While blinking, the display can be changed to match the reference
thermometer by pushing the UP or DOWN arrow pads to raise or lower the temperature until
the display reads the correct value. If no arrow pads are pressed within five (5) seconds the
display will revert to displaying the temperature within the chamber.
NOTE: Temperature accuracy should be checked at least monthly or after the unit has been turned
off for an extended period of time.
6.5 Set The Overtemperature Safety Thermostat: The Overtemperature Safety should be
initially set to its maximum position when stabilizing the set point temperature. Once the
oven is stabile at the desired set point, turn the Overtemperature Safety counterclockwise
(using a coin or flat-head screwdriver) until the OTP light comes on. Next turn the Safety
clockwise just until the OTP light goes off. Then turn the Safety clockwise two (2) minor
increments on its scale past the point where the light went out. This sets the
Overtemperature Safety Control at approximately 10

C above the Main Temperature set
point.
6.6 Set Timer Display: Turn the timer switch to the ON position. The SET/TIMER display
digits will light with no lighted decimals showing (See Figure 2). Note that, if during any of
the following steps, several seconds elapse with no arrow pad or reset pad activity, the timer
will default to the present displayed setting and it will be necessary to restart all functions
over again. The values must be programmed in a consecutive manner with no delays
between settings or the default will occur.
A. Hour Function: Press and hold the RESET pad until the digits start blinking and a
blinking decimal shows between digits 2 and 3. In this mode, pressing the UP or
DOWN arrow pads increases or decreases the whole hour value from 0 to 99
(digits 1 and 2).
Section
6