Air Switch Adjustment | Portable Dryer Troubleshooting | |
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Competitor Air Switch Adjustment
Air Switch location.
Air Switch assembly.
IMPORTANT: To adjust the air switch the grain columns need to be full of grain so that the plenum can build up air pressure and close the air switch.
1.With the Load Auger, Fan, Heater, and Unload switches in the off position turn on the Control power then push the Dryer Power Start switch.
2.With power now applied to the dryer flip the fan switch to the on position and watch the light right above that switch. If the light illuminates when the fan reaches half its full speed, then no adjustment is required. However, if the light does not illuminate until the fan is running at full speed or the light does not illuminate at all and the dryer shuts down the air switch is adjusted too high (skip to step 3a). If the light illuminates before the fan reaches half its full speed the air switch is adjusted too low (skip to step 3b).
3a. If the light above the fan switch illuminates after the fan reaches full speed or did not illuminate at all and the dryer shut down then the air switch needs to be made more sensitive. Turn adjustment screw in the more sensitive direction (counter clock- wise). Make this adjustment on the air switch 1/4 turn at a time and each time restart the fan and watch to see when the light illuminates.
3b. If the light above the fan switch illuminates before the fan reaches half its full speed then the air switch needs to be less sensitive. Turn adjustment screw in the less sensitive direction (clockwise). Make this adjustment on the air switch 1/4 turn at a time and each time restart the fan and watch to see when the light illuminates.
4.Flip the fan switch to the off position and watch the light. Now it should go out when the fan is about half its full speed. Adjust the air switch if necessary. Remember that less sensitive (clockwise adjustment) will require a higher fan speed to close the air switch, and more sensitive (counter clockwise adjustment), the switch can close at a slower fan speed.
FAN
OFF
AUTOO N
98
