Farm Fans C-2120A, Operator'S Manual, Page: 19 / 68

Before the dryer is filled with grain and placed into
actual drying operation
, thoroughly inspect the unit
and check out the operation as described in the follow-
ing steps.
1. Set controls and switches as follows:
CONTROL TEST FIRING SETTING
Burner Switch OFF
Load Auger switch OFF
Unload Auger Switch OFF
Unloading Switch OFF
Manual Unload Setting Adjust to minimum
Loading Timer 30 minutes
2. Inspect metering rolls and inside of dryer.
Open all metering roll access doors and all hinged fast-
trip clean-out doors and carefully inspect each com-
partment for any bolts, nuts or other foreign hardware
which may have dropped into these areas during dryer
installation and setup. Remove all material present to
prevent possible jamming of the meter rolls or bottom
auger and contamination of dried grain.
Check the inside of air plenum chambers and remove
all foreign materials.
3. Check plumbing for leaks.
Open the main fuel supply valve to allow fuel flow to the
electrically operated Main/Safety Gas Shut-off Valve.
Note: Open the supply valve slowly to prevent acci-
dental closing of the excess-flow valve within supply
system.
Proceed only after all fuel leaks have been corrected.
4. Turn on all circuit breakers located in the PSC power
box.
5. Start dryer control circuit.
Push the control START button. The green light on the
control START button should immediately light, indicat-
ing the safety circuit and control circuit are energized to
allow dryer operation.
6. Check conveyor motors rotation.
A. With the wet grain supply shut off, quickly bump
(jog) the Load Auger Switch to the ON position. The
top auger should rotate clockwise as viewed from the
drive end. Any wet grain auxiliary sup ply conveyors
connected to the dryer power terminals should also
start and rotate in the proper direction.
B. Quickly bump (jog) the Unload Auger Switch to the
ON position. The lower auger should rotate counter-
clockwise as viewed from drive end. Any dry grain aux-
iliary conveyors connected to the dryer power terminals
should also start and rotate in the proper direction.
C. With the Unload Auger Switch ON, set the Meter
Roll Selector Switch to MANUAL position and check
the direction of rotation. The RH metering roll shaft
should rotate clockwise as viewed from rear end of the
dryer. See Fig. 6-14.
7. Check meter roll operation.
With Unloading Auger still operating, rotate the MANU-
AL UNLOADING control to increase meter roll speed
and check the metering roll drive mechanism for prop-
er operation throughout its full speed range. The
UNLOAD RATE should range from approximately 7%
to 100%. Make sure all drive belts and chains are
properly tensioned and that all sections of the meter
rolls rotate properly and smoothly.
8. Check fan motor rotation.
Bump (jog) each fan switch and observe direction of
motor rotation. All fans should turn COUNTER-
CLOCKWISE, as seen when looking into the fan inlet.
NOTE: On three-phase model dryers, if all dryer
motors run backward, they can easily be reversed by
changing the dryer's power supply connection.
Auxiliary conveyors which have been field connected
may have to be reversed individually.
9. Check burner safety lock-out function.
Start the Upper Fan and turn the Upper Burner switch
to the ON position. With the Main/Safety Shutoff valve
kept in the normally closed position for this portion of
the test, the burner control system's PL Safety Circuit
should cause a dryer shutdown after a short interval.
The red Upper Burner LOCKOUT light should indicate
the shutdown.
Turn the Upper Burner OFF, Restart the Control Circuit,
and repeat the test procedure for the Lower Burner.
10. Open the Main/Safety Gas Shut-off valve by using the
handle.
With the control circuit activated (green light ON), man-
ually operate the lever on the Main/Safety Gas Shut-off
valve to turn the fuel ON. Inspect all fuel lines and con-
nections for possible leaks. ANY GAS LEAKS MUST
BE CORRECTED.
11. Starting fan and firing burner.
Individually start Upper and Lower Fans. Observe the
number of seconds for each fan motor to reach FULL
RPM. With proper voltage supply and wire sizing to
dryer, the fan should reach full speed within 7 seconds
and the motor running current should be within accept-
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