Grain Systems PNEG-1350 - Manual

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.
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.
PNEG-1350
Network Series Air Switch Adjustment
With power now applied to the dryer flip one of the fan switches to the on
position and watch for the light to illuminate the fan switch knob. If the light
illuminates when the fan reaches half its full speed, then no adjustment is re-
quired. 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, then 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).
1.
2.
3a.
Upper Air Switch.
If the light 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 sensi-
tive. 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 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 adjust-
ment on the air switch 1/4 turn at a time and each time restart the fan and watch to see when the
light illuminates.
Air Switch locations.
Lower Air Switch.
Fan Switches
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. 4.