Grain Systems PNEG-1935 - Manual (Page 28)

5. Operations
28 PNEG-1935 Vision Hybrid for Portable Dryers
The “Select Burner Mode” screen will allow the operator to select the type of burner operation for
each burner. The user has three (3) options: HI/LO, ON/OFF and AUTO modes.
a. HI/LO Mode (Default Setting): The burner will switch from high heat to low heat when the
plenum temperature setpoint has been reached.
b. ON/OFF Mode: The burner will shut OFF when the upper temperature setpoint has been
reached and turn back on when the lower temperature setpoint has been met.
NOTE: Useful for low plenum temperature settings in warm conditions.
c. AUTO Mode: All burners in HI/LO will be started. If the burner stays in “Low-Fire” for 60 seconds
or the plenum temperature exceeds the setpoint plus 20° for 10 seconds, that burner will switch
to ON/OFF operation.
NOTE: Useful in very warm ambient temperature conditions.
To select modes, touch the “Select” button for the fan/heater you wish to change. Touching the
“ALL HI/LO” button will set all burners to HI/LO and the same procedure can be duplicated for the
“ALL ON/OFF” and “ALL AUTO” buttons. Choose the “ACCEPT” button to save any changes and
return to the “Setup Screen” or choose “CANCEL” to return to the “Setup Screen” without saving
any changes.
6. Calibrate Moisture Sensor: There are two (2) moisture/temperature sensors per
dryer - one for incoming grain (wet) and another for outgoing (dry). Each device has one moisture
and one temperature sensor included.
(See Figure 5M.)
Figure 5M
Calibrating moisture: Take several moisture samples of the grain over an extended period of
time, average these values and calibrate the sensors accordingly.
Example: If the dryer’s exiting moisture (dry) is reported at 15.5% on the Vision screen and the
averaged samples yielded a value of 15%, then the calibration screen would be used to enter
-0.5% as the “Dry Moist Offset”.
Calibrating temperature: Take several temperature samples of the grain over an extended
period of time, average these values and calibrate the sensor accordingly.
Example: If the dryer’s incoming temperature (wet) is reported to be 105°F on the Vision screen
and the average samples yield a value of 100°F, adjust the “Dry Temp” to -5.