Farm Fans C-2120A, Руководство оператора, Страница: 25 / 68

23
Test operate the dryer immediately prior to
start-up to make certain that all motors and
controls are functional before loading the
dryer with wet grain.
1. Set controls:
Burner switches OFF
Load Auger switch OFF
Unload Auger switch OFF
Meter Roll Sel. Switch OFF
Load Timer
10 min
Plenum temperature See drying tables
for recommended
settings
2. Turn all circuit breakers in the PSC box ON
and press green START button. Green indica-
tor light should come ON.
3. Reset the Main Safety Gas Shut-off Valve to
OPEN position.
4. Set Load Auger Switch to ON and allow dryer
to fill. Load auger will automatically shut off
when dryer is filled.
5. Using the Drying Time Tables, determine the
approximate drying time required for the type
of grain, drying process used, and required
moisture reduction.
6. Start the lower fan and burner and operate at
the plenum temperature for normal operation
of the upper burner for a period of 3/4 the dry-
ing time determined from the Drying Time
Tables in step (5).
7. Start the upper fan and burner and operate
both upper and lower fans and heaters for a
time period of 1/4 the required drying time.
8. Turn the lower burner off and allow the lower
fan to cool while the upper fan and heater con-
tinue to dry for a period of 1/4 the required dry-
ing time.
9. Turn the Unload Auger to ON, the Meter Roll
Selector Switch to MANUAL, and adjust the %
Unload Rate as indicated in the Unload Rates
of Figs. 5-4 to 5-6 to achieve the required dry-
ing time for DRY/COOL operation.
6. Start the lower fan and burner and operate at
the temperature recommended for the upper
burner for a period of 1/2 the drying time deter-
mined from the Drying Time Tables in step (5).
7. Start the upper fan and burner and operate at
the normal operating temperature for a period
of 1/4 the drying time.
8. Reduce the plenum temperature setting on the
lower burner to its normal operating tempera-
ture.
9. Turn the Unload Auger to ON, the Meter Roll
Selector Switch to MANUAL, and adjust the %
Unload Rate as indicated in the Drying Tables
to achieve the required drying time for FULL
HEAT operation.
NOTE: During initial start-up of a continuous
flow dryer, the grain moistures discharged may
not be of the desired moisture content until the
dryer has been unloading for the time required
to make one grain pass:
time (min.) = [ holding capacity (bu) x 60 ]
unload rate (bph)
10. Observe the typical operating time for the load
auger and set the Load Timer to a longer time
to provide shutdown on wet grain outages. Set
load switch to AUTO to energize this low-grain
shutdown feature.
11. After the dryer has been allowed to operate for
one grain pass, check the grain moisture dis-
charged for the desired drying results and
make unload rate changes as required to
obtain the proper discharge moistures. Allow
another grain pass time and recheck grain
moisture.
12. Set the Moisture Controller temperature and
set Unload Switch to AUTO, referring to the
procedure outlined in Section 3 - Operating
Controls.
13. Make periodic checks of incoming grain mois-
ture, discharged grain moisture, and plenum
temperature to monitor dryer operation. Keep
in mind that grain drying is a very slow process
and that changes in the unload rate made
either by the automatic moisture controller or
manually will require 1/2 to 3 hrs to be mea-
sured in the grain discharge moisture depend-
ing on grain pass time. Do not overreact due
to slow response to an unload speed change
by making a second correction before the first
has been analyzed.
14. If dryer shutdown occurs, check for a shut-
down indicator light. Check the listing of safety
circuit monitors in Sections 3 and 9 for more
information about indicator lights.
D R Y & C O O L
F U L L H E A T
S T A R T - U P P R O C E D U R E
F U L L H E A T & D R Y / C O O L