Farm Fans C-21100B, Руководство пользователя, Страница: 13 / 66

PRIMARY COMPONENTS
POWER DISCONNECT
The dryer is equipped with a power disconnect lever on
the front of the PSC control box. Note that a power
supply disconnect external to the dryer is also recom-
mended, as described under the Electrical Power
Supply heading in Section 2.
CONTROL START/STOP
With all dryer circuit breakers turned ON, the Main
Control circuit can be energized by first rotating the red
Stop switch clockwise until the button pops out to
enable the control circuit, and then pushing the green
START button. The green light on the START button
indicates that the control circuit is ON and that all safe-
ty switches are reset.
Push the red STOP button to stop the dryer control cir-
cuit. Note that this button remains locked in the OFF
position until rotated to enable the control start.
A warning HORN will sound when the STOP button is
enabled (pulled out), until the START button is pushed
and the safety circuit is energized to allow dryer opera-
tion.
FAN START/STOP
The Fan can be started by pushing the green START
FAN button. When the Fan is up to speed and air pres-
sure is proven, the green light on the START button will
glow. When this light is on, the purge cycle timer will
start.
Push the red STOP FAN button to stop Fan.
BURNER ON/OFF
Turning the Burner On/Off switch ON merely enables
burner ignition. Actual burner ignition requires proven
airflow, a purge time, and the Main/Safety Shutoff Valve
to be in the OPEN position. A purge time of approxi-
mately 15 seconds begins after the fan air pressure is
proven as indicated by the illumination of the Fan Start
button.
With BURNER switch ON and the purge cycle com-
pleted, the green BURNER ENABLED light will light for
5 to 15 seconds. During this time, the burner can be
ignited by opening the Main/Safety Gas Shutoff
Valve(s) (both valves must be opened on natural gas
units). Should the BURNER ENABLED light go off
before ignition takes place, the burner will lock out as
indicated by the red burner Lockout Indicator. The fire
protection timer can be reset after a short cool-off time
by pushing the green button on the Flame Safeguard
Control located inside the ASC control box. Ignition
can then be retried.
When ignition is completed, the green BURNER
ENABLED light will remain ON as long as a fire is
sensed. If the flame is lost, the red Burner Lockout
Light will come on and the FLAME SAFEGUARD con-
trol must be manually reset to reignite burner.
MAIN/SAFETY GAS SHUTOFF VALVE
VALVE OPERATION - This is an electrically energized,
manual reset type valve. The valve is equipped with an
electric solenoid which is energized only when the
dryer Burner Switch is turned ON.
The valve has a "free handle" lever which will not open
the valve to allow gas flow to the dryer until the Burner
Switch is turned ON. Only then will the lever engage to
allow the handle to be manually raised to the latched
position, thereby opening the valve. The valve will trip
closed instantly when its solenoid is de-energized; gas
flow will also stop when the lever is rotated to the
closed position.
An "open" and "shut" indicator is provided on the side
of the Main/Safety Shutoff valve. (An orange indicating
bar aligns itself with the words "open" or "shut.")
Note: For the burner to fire, the Main/Safety Gas
Shutoff Valve must be manually reset to OPEN and the
fan must be ON.
LOAD AUGER
The LOAD AUGER switch has three positions: ON,
OFF, and AUTO.
The ON position is recommended when initially filling
an empty dryer. With switch ON, the top auger will
operate, but the Load Timer is de-energized.
With the switch in either AUTO or ON, the top auger
automatically starts and stops, as required, to keep the
dryer full of grain.
The AUTO switch position is the normal setting and is
used to automatically stop the dryer when the wet grain
supply is exhausted. With switch in the AUTO position,
the Load Timer will be energized whenever the load
auger is operating. If the load auger and timer operate
continuously for a period longer than the timer setting,
the timer will automatically shut down the dryer and the
LOW GRAIN light will come on.
LOAD (Top Auger) TIMER
FUNCTION - The top auger loads the wet bin inter-
mittently, depending on when the paddle switch calls
for more grain. The Load Timer checks that the load
auger doesn't run beyond the normal time to fill the wet
grain holding bin. If, due to inadequate wet grain sup-
ply, the load auger runs longer than a normal refill time,
the Load Timer causes a dryer shutdown.
The Load Timer, located within the ASC control box, is
an automatic reset type timer. The amber LOW GRAIN
shutdown indicator will light whenever a shutdown is
caused by the Load Timer.
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