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5. Dryer Pre-Start Checks
Burner Safety
To check the burner safety function, make sure the main gas valve is OFF. Turn the FAN switch ON and allow the fan to start. Then, turn the HEATER switch ON. The dryer will shut down after 20 seconds. The safety message, “loss of flame” will appear.
Heater Test Fire
The following test should be done with grain in the dryer. If no grain is present, set approximate pressure settings and fine tune when grain arrives. Test fire the burner by starting the fan, and then turn the burner switch to ON with the fuel supply turned on. The heater should ignite after a short purge delay of approximately 10 seconds. Gas pressure should be shown on the gauge. At this time, set the
Approximate settings should be:
LP Gas | Natural Gas |
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If the burner remains on
Staged Batch Check
The following test must be done with grain in the dryer or with the air switch turned OFF as noted in the FAN switch Section on Page 24. To check the staged batch operation, turn the CONTROL POWER switch to the ON position. Open the main fuel supply valve at the tank on an LP dryer or open the valve in the fuel supply line on a natural gas dryer. Turn the drying mode switch to the staged batch position. Turn ON the electric shut off valve to allow fuel flow to the dryer. Turn the load switch to AUTO, the unload switch to 1 Speed and the fan and burner to ON. Push the dryer power start button and the controller will sequentially start all dryer components in their proper order. If any switches are not in their correct position for staged batch operation, the dryer will indicate improper switch position, and will not start until the switches are in the proper position. After starting, all batch timers will time down in sequence. When the unload cycle is complete, the timers will automatically reset to their original settings, and start the dryer timer again.
NOTE: If the dryer is empty, the burner does not operate. The fans cannot create enough static pressure to engage the air switch. You will receive a “no airflow” message. To start the dryer when it is low on grain, the airflow switches must be turned OFF. Switching Dip Switch number eight (#8), on the back of the computer control board, to ON turns the Air Switch OFF.
Dip switch number eight (#8) must be turned back to the OFF position after this test is complete or no air testing will occur.
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