Airstream 2000 Series Operation manual

1
AI R S T R E A M GR A I N CO N D I T I O N I N G SY S T E M S
A N D S E R V I C E M A N U A L
DRYER OPERATION
1 9 9 4
PNEG-347
2000 SERIES
TWO MODULE STACK
DRYER MODELS

2

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Warranty.......................................................................................................................4
Safety First...................................................................................................................5
Safety Alert Decals.......................................................................................................6
Safety Precautions.......................................................................................................7
Dryer Control Panel Featuring The Electronic Monitoring Control System.......................8
Safety Circuit Shutdown Messages......................................................................12
Dryer Pre Start Checks...............................................................................................14
Pre Season Inspection..........................................................................................14
Dryer Start Up & Operation..............................................................................................18
Continuous Flow And Continuous Batch Start Up Procedure..............................18
2200 Series Continuous Flow Metering Roll Settings-Full Heat...............................19
2200 Series Continuous Flow Metering Roll Settings-Dry & Cool.............................20
2300 & 2400 Series Continuous Flow Metering Roll Settings-Full Heat..............21
2300 & 2400 Series Continuous Flow Metering Roll Settings-Dry & Cool...........22
Fan & Heater Switch Settings...............................................................................24
2000 Series Staged Auto Batch Timer Settings....................................................26
2000 Series Dryer Service Guide.....................................................................................27
Seasonal Inspection And Service.........................................................................28
Suggested Lubricants..........................................................................................29
Fan Propellor Removal And Installation...............................................................30
Fan Motor Removal And Installation....................................................................31
Heater Parts Removal And Installation................................................................32
Metering Roll Servicing........................................................................................33
How To Determine A Metering Roll Problem........................................................34
2200 Series Wiring Diagrams.......................................................................................35
2300 Series Wiring Diagrams.....................................................................................46
2400 Series Wiring Diagrams.....................................................................................57
Trouble Analysis Procedure...................................................................................68
Quick Reference Guide........................................................................................73
Notes...................................................................................................................74
2000 SERIES DRYER OPERATION AND SERVICE
TABLE OF CONTENTS

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2000 SERIES DRYER OPERATION AND SERVICE
This manual describes the
operation and service for all stan-
dard production 2000 series two
module grain dryers. These
models are available for liquid
Thank you for choosing an Air-
stream Grain Dryer. This dryer is
one of the finest ever built. It is
designed to give excellent perfor-
mance and service for many years.
propane or natural gas fuel sup-
ply, with either single phase 230
volt, or three phase 220 or 440
volt electrical power.
WARRANTY
Grain Systems, Inc. warrants its
products to be free of defects in ma-
terial and workmanship. The only
obligation of the manufacturer is to
repair or replace components which
have been submitted and found to
be defective within 24 months after
installation. If so found to be defec-
tive, the components will be repaired
or replaced without charge, this con-
stituting and entirely fulfilling the
warranty obligation. Grain Systems,
Inc. assumes no liability for ex-
penses incurred without written au-
thorizations; in no event shall liabil-
ity include special or consequential
damages, or exceed the selling price
of the product.
This warranty does not cover
products or parts which have been
damaged by negligent use, misuse,
alteration or accident. Electric mo-
tors, tires, and other components
supplied by outside manufacturers
have separate warranties, from
those suppliers. This warranty is ex-
clusive and in lieu of all other war-
ranties, expressed or implied. Grain
Systems, Inc. reserves the right to
make design or specification
changes at any time, without any
contingent obligations to purchasers
of products already sold.
All instructions shall be con-
strued as recommendation only.
Because of the many variable con-
ditions in actual installation, Grain
Systems, Inc. assumes no liability
for results arising from the use of
such recommendations. Any alter-
ation in design or operation of any
Grain Systems, Inc. product must be
submitted and approved in writing by
Grain Systems, Inc. before the al-
teration is made.
Airstream Service Technician checks the wiring on a dryer control box.

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SAFETY FIRST
SAFETY ALERT DECALS
Grain Systems, Inc.'s principle con-
cern is your safety and the safety of
others associated with grain han-
dling equipment. This manual was
written with that thought in mind. We
want to keep you as a customer by
helping you understand safe
operating proceedures, and some of
the problems that may be encoun-
tered by the dryer operator or other
personnel.
As owner and/or operator, it is
your responsibility to know what re-
quirements, hazards and precau-
tions exist, and to inform all person-
nel associated with the equipment
or who are in the dryer area. Avoid
any alterations to the equipment.
Such alterations may produce a very
dangerous situation, where serious
injury or death may occur.
SAFETY ALERT SYMBOL
WARNING! BE ALERT!
Personnel operating or working around
a dryer should read this manual. This
manual must be delivered with equip-
ment to its owner. Failure to read this
manual and its safety instructions is a
misuse of the equipment.
The symbol shown below is used to
call your attention to instructions
concerning your personal safety.
Watch for this symbol; it points out
important safety precautions. It
means "ATTENTION", "WARNING",
"CAUTION", and "DANGER". Read
the message that follows and be
cautious to the possibility of per-
sonal injury or death.
Safety decals should be read and
understood by all people in and
around the dryer area. If the follow-
ing safety decals are not displayed
on your dryer, or if they are dam-
aged, contact Grain Systems, Inc.
for replacement.
A CAREFUL OPERATOR
IS THE BEST INSURANCE
AGAINST AN ACCIDENT
Grain Systems, Inc. recommends
you contact your local power com-
pany and have a representative sur-
vey your dryer installation, so your wir-
ing will be compatible with their sys-
tem and you will have adequate power
supplied to your unit.

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Three decals displayed on all Airstream Dryers. Belt drives, chain driven meter rolls
and combustible fuels must be treated with caution.
SAFETY ALERT DECALS

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1. Read and understand the operating manual before trying to operate the
dryer.
2. Never operate the dryer while the guards are removed.
3. Power supply should be OFF for service of electrical components.
Use CAUTION in checking voltage or other procedures requiring power
to be ON.
4. Check for gas leaks at all gas pipe connections. If any leaks are
detected, do not operate dryer. Shut down and repair before fur-
ther operation.
5. Never attempt to operate the dryer by jumping or otherwise bypassing
any safety devices on the unit.
6. Set pressure regulator to avoid excessive gas pressure applied to burner
during ignition and when burner is in operation. See chart for operat-
ing procedures. Do not exceed maxi mum recommended drying tem-
perature.
7. Keep the dryer clean. Do not allow fine material to accumulate in
the plenum chamber.
8. Keep auger drive belts tight enough to prevent slippage.
9. Use CAUTION in working around high speed fans, gas burners, augers
and auxiliary conveyors which START AUTOMATICALLY.
10. Do not operate in any area where combustible material will be drawn into
the fan.
11. Before attempting to remove and reinstall any propeller, make certain to
read the recommended procedure listed within the servicing section of
the manual.
12. Be certain that capacities of auxiliary conveyors are matched to dryer
auger capacities.
13. Clean grain is easier to dry. Fine material increases resistance to airflow
and requires removal of extra moisture.
SAFETY PRECAUTIONS
USE CAUTION
IN THE OPERATION
OF THIS EQUIPMENT
The design and manufacture of this
dryer is directed toward operator
safety. However, the very nature of
a grain dryer having a gas burner,
high voltage electrical equipment
and high speed rotating parts, does
present a hazard to personnel,
which can not be completely safe-
guarded against, without interfering
with efficient operation and reason-
able access to components.
Use extreme caution in working
around high speed fans, gas fired
heaters, augers and auxiliary con-
veyors, which may start without
warning when the dryer is operating
on automatic control.
READ THESE INSTRUCTIONS
BEFORE OPERATION AND SERVICE
SAVE FOR FUTURE REFERENCE
Continued safe, dependable opera-
tion of automatic equipment de-
pends, to a great degree, upon the
owner. For a safe and dependable
drying system, follow the recom-
mendations within this manual, and
make it a practice to regularly in-
spect the operation of the unit for any
developing problems or unsafe con-
ditions.
Take special note of the safety
precautions listed above before at-
tempting to operate the dryer.
KEEP THE DRYER CLEAN
DO NOT ALLOW FINE
MATERIAL TO ACCUMULATE
IN THE PLENUM CHAMBER
OR SURROUNDING THE
OUTSIDE OF THE DRYER

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DRYER CONTROL PANEL
Figure 1: The grain dryer control panel with the Electronic Monitoring Control System in the upper right panel.
MOISTURE CONTROL
THERMOSTAT
DRYER CONTROL PANEL FEATURING
THE ELECTRONIC MONITORING CONTROL SYSTEM
This switch turns the power on or
off to the moisture control thermo-
stat. It lights up when the grain col-
umn temperature is below the ther-
mostat set point.
This electronic thermostat controls
the moisture level of discharged
grain by sensing grain column tem-
perature.
information regarding dryer operation.
The control panel provides easy access
to gauges and controls, and the illumi-
nated switches provide a quick reference
for every operating function. The patent
pending Electronic Monitoring Con-
trol System is a computerized con-
trol system that gives instant
MOISTURE CONTROL
SWITCH

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DRYER CONTROL PANEL
CONTROL POWER
SWITCH
The power to the Electronic Moni-
toring Control System is turned on
or off with this switch.
The dryer service light is turned on
or off here. It also may be set on
auto, which turns the light on while
the dryer is running, and off if a
shutdown occurs.
OUTSIDE LIGHT
LOAD AUGER SWITCH
FAN SWITCHES
Each fan is turned on or off with
this switch. The on position oper-
ates the fan continuously during
staged batch and continuous flow
modes. The auto position operates
the fan in staged batch during the
dry and cool cycle. The switch will
light up whenever the airflow
switch is sensing airflow and the
dryer is full of grain.
HEATER SWITCHES
Each heater switch is used to turn
the burner on or off. The auto po-
sition operates the burner in
staged batch during the dry cycle.
The on position will operate the
burner only when the fan is run-
ning. The switch will light up when
the flame sensor detects the flame.
UNLOAD SWITCH
The unload switch turns the meter-
ing rolls and discharge auger on or
off, and selects the operation of the
metering rolls.
Inthe2 speed position if the moisture
control switch is on, and the drying
mode switch is turned to cont. flow,
the metering roll speed will alternate
between the high speed metering roll
potentiometer setting and the low
speed metering roll potentiometer set-
ting depending on the control signal
from the moisture control thermo-
stat. The discharge auger will oper-
ate continuously.
 In the 1 speed position, if the mois-
LOW SPEED METERING
ROLL POTENTIOMETER
This is used to select the opera-
tion of the fill auger. In both the
auto and manual position the load
auger will operate if the dryer is low
on grain and will automatically shut
off when the dryer is full. In the auto
position only, the dryer will shut
down after a preset period of time
set on the out of grain timer if grain
flow is interrupted to the dryer. The
switch will light whenever the load
auger is operating.
Note: If the load auxiliary motor
overload relay is being utilized in
the dryer control panel, this switch
will also control the operation of the
auxiliary equipment.
ture control switch is on, and the dry
ing mode switch is turned to cont.
flow, the metering roll speed will op-
erate at the high speed metering roll
potentiometer setting or turn off de-
pending on the control signal from
the moisture control thermostat. The
discharge auger will operate when
ever the metering rolls are operating.
 In both the 1 speed or the 2 speed
position, if the moisture control switch
is off, and the drying mode switch is
turned to cont. flow, the metering roll
speed can be manually controlled by
adjusting the high speed metering roll
potentiometer. The discharge auger
will operate continuously.
 If the drying mode switch is turned
to staged batch, the unload switch
should be set to the 1 speed posi-
tion. The discharge auger and me-
tering rolls will only operate dur-
ing the unload cycle of the staged
batch operation, and the speed of
the metering rolls is adjusted us-
ing the high speed metering roll
potentiometer.
Note: If the unload auxiliary
motor overload relay is being uti-
lized in the dryer control panel,
this switch will also control the
operation of the auxiliary equip-
ment.
This is used to adjust the low speed
of the metering roll when the 2 speed
automatic moisture control feature
of the dryer is in use.
DRYING MODE SWITCH
This is used to select staged batch
or continuous flow drying. The
switch will light only after the Elec-
tronic Monitoring Control System
has been turned on, the safety cir-
cuit is okay and the reset button
on the control panel has been
pressed.

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DRYER CONTROL PANEL
This switch stops all dryer func-
tions. If an automatic dryer shut-
down occurs, first determine and
correct the cause of the shutdown.
Then, press the dryer power stop
button to reset the dryer before
restarting.
This switch starts and operates the
dryer based on switch settings. If
other switch settings are in the off
position, individual dryer compo-
nents can be operated by turning the
drying mode switch to continuous
This is used to:
 Set the high speed of the metering roll
when the two speed automatic mois-
ture control feature of the dryer is uti-
lized.
 Set the speed of the metering rolls
when the one speed automatic mois-
ture control feature of the dryer is uti-
lized.
 Set the speed of the metering rolls
during continuous flow operation
when the moisture control is not used.
 Set the rate of grain discharge from
the dryer during the unload cycle of
staged batch dryer operation.
flow, pressing the dryer power start
button and then turning on the de-
sired dryer component.
HIGH SPEED METERING
ROLL POTENTIOMETER
DRYER POWER
START SWITCH
DRYER POWER
STOP SWITCH
The Airstream Dryer Control Panel.

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DRYER CONTROL PANEL
TURNING ON THE
ELECTRONIC
MONITORING CONTROL
SYSTEM
SETTING THE DRY, COOL
AND UNLOAD BATCH
TIMERS
Turn the control power switch to on. The
monitor will display a copyright message
and model number, total running time in
hours and minutes and the current time
and date. To activate the controller press
the reset button.
if the dryer is stopped, these times
are saved by the controller. When
the dryer is restarted the timers will
continue timing down. The timers
will return to their initial settings by
pressing the reset button.
SETTING THE OUT OF
GRAIN TIMER
If the dryer runs out of grain while the
load auger switch is in the auto position,
the out of grain timer automatically shuts
off the dryer after the period of time pre-
set on the timer. When pressed the dis-
play will show the amount of time left on
the timer and the percentage of time the
last load used. A second screen will
appear showing the timer's setting and
will allow the operator to modify it as de-
scribed for setting the batch timers.
The Electronic Monitoring Control
System (Figure 2) controls all tim-
ing functions and safety circuit
checks. It is designed to simplify
dryer operation by providing printed
messages and warnings on its liq-
uid crystal display (LCD).
ELECTRONIC
MONITORING CONTROL
SYSTEM
Figure 2: The Aistream Electronic Monitoring Control System
These switches are used to set the cycle
times in the staged batch drying mode
only. The drying mode switch must be
in the staged batch position. The cur-
rent settings on these three timers is dis-
played directly above their timer button.
To change the setting of these timers
follow these instructions:
1. Press the dry, cool or unload
timer button.
2. Press the modify button.
3. Press the increase or decrease
button to adjust the settings.
4. Press the enter button.
During operation the remaining
time on each timer is displayed on
the screen. If the power goes out or

12
DRYER CONTROL PANEL
SETTING THE LOAD AND
UNLOAD DELAYS
UTILIZING THE
BUSHEL COUNTER
bushels dried on the third line. By
pressing the bph/rpm/total bu but-
ton the second line will alternate
between the metering roll rpm's or
the bushel per hour rate. The to-
tal bushels dried reading is the to-
tal since the bushel counter was
last reset. To reset the bushel
counter, press and hold the reset
button for five seconds. Press the
enter button through the date and
time settings and then follow the
instructions displayed on the LCD
for resetting the counter.
In the batch mode the first line
of the LCD display tells which timer
is being used, and the second line
switches between total batches,
unload RPM or total bushels. The
third line indicates total dry time
and the fourth line is time remain-
ing on the timers.
DRYER SAFETY CIRCUIT
The Electronic Monitoring Control
System continuously checks all
safety circuits on the dryer, and will
automatically shut the dryer down
should a problem occur. The cause
of the dryer shutdown will be dis-
played on the LCD display, and a
beeper will sound on the controller.
To restart the dryer after a safety
shutdown, first correct the reason for
the shutdown, and then press the
dryer power stop button to reset the
circuit. Press the start button.
The Electronic Monitoring Control
System stores in its memory the time,
date and cause for the last 25 dryer
safety shutdowns. To review this in-
formation hold the reset button in for
five seconds. The procedure for re-
viewing the safety circuit shutdown log
will be displayed on the LCD display.
The load delay is used to delay the
starting of the load auger when the
dryer is unloading to prevent the load
auger from starting and stopping.
The unload delay is used to control
the amount of time the unload au-
ger runs after the metering rolls stop
to allow for auger cleanout. Both the
load and unload delays are set us-
ing the same procedure as the tim-
ers. The aux 1 and aux 2 delays are
presently not being used.
When operating the dryer the LCD
display will show the dryer mode of
operation on the first line, the bush-
els per hour or the metering roll rpm
on the second line and the total
SAFETY CIRCUIT SHUTDOWN MESSAGES
12 VOLT POWER
SUPPLY WARNING
The right circuit breaker on the input/
output board has tripped.
has tripped, or one of the hardware
timers has shut down the dryer.
BURNER 1, 2, 3 OR 4
WARNING FLAME NOT
DETECTED
The flame sensor has failed to de-
tect a burner flame indicating that the
burner has failed to light, there is a
problem with the flame sensing cir-
cuitry or the dryer is not getting
burner fuel. The lowest burner is
number one, and the top burner
would be number four on a four fan
dryer.
L1 VOLTAGE LOST
BURNER 1, 2, 3 OR 4
VAPOR HIGH
TEMPERATURE
The temperature high limit located
on the fan/burner housing has
opened, indicating an over tempera-
ture condition has occurred towards
the rear of the fan/heater housing.
The lowest fan/burner is number
one, and the top fan/burner would
be number four on a four fan dryer.
This control is set at 200°F and must
be manually reset.
FAN 1, 2, 3 OR 4
HOUSING HIGH
TEMPERATURE
The LP gas vapor temperature
sensor located in the gas pipe train
downstream from the vaporizer,
has opened indicating that the
vaporizor is running too hot and
must be readjusted. The lowest
burner is number one, and the top
burner would be number four on a
four fan dryer. This sensor is set
at 200°F and automatically resets
itself when cool.
The left circuit breaker located on
the input/output board of the Elec-
tronic Monitoring Control System

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DRYER CONTROL PANEL
AUXILIARY SAFETY
SHUTDOWN
A shutdown has occurred due to an
auxiliary installed safety feature.
BURNER 1, 2, 3 OR 4
SHUTDOWN
LOSS OF AIRFLOW
LOWER OR UPPER
ADJUSTABLE GRAIN HIGH
TEMPERATURE
The contacts in the air switch have
opened due to insufficient airflow for
the burner to operate. The lowest
burner is number one, and the top
burner would be number four on a
four fan dryer.
FAN 1, 2, 3 OR 4
CANNOT START
CHECK AIR SWITCH
The air switch contacts have
closed prior to the fan starting, in-
dicating a freewheeling blade or
improper setting of the air switch.
The lowest fan is number one, and
the top fan would be number four
on a four fan dryer.
GRAIN DISCHARGE
WARNING
The lid on the grain discharge box
has opened, indicating that grain is
not being taken away fast enough
at the discharge box.
PLENUM 1, 2, 3 OR 4
HIGH TEMPERATURE
An over temperature condition has
occurred inside the dryer plenum.
The message indicates by number
where the problem is located. Each
fan has a plenum chamber. The bot-
tom plenum chamber is number one,
and the top plenum would be num-
ber four on a four fan dryer. This
control is a 300°F limit and automati-
cally resets itself when cool.
The metering roll drive system has
failed to turn. A broken chain or
jammed metering roll is a possibility.
RIGHT METERING ROLL
FAILURE
The right (as viewed from behind the
dryer) metering roll has stopped turn-
ing, or the sensor has been damaged.
LEFT METERING ROLL
FAILURE
The left (as viewed from behind the
dryer) metering roll has stopped turn-
ing, or the sensor has been damaged.
MOTOR OVERLOAD
One of the thermal overloads on ei-
ther the fan, load, unload or auxil-
iary motors has opened, indicating
an overcurrent condition. The over-
loads must be manually reset.
The dryer has run low on grain, and
the out of grain timer has timed out,
shutting the dryer down. The unload
auger will clean out the dryer if in
continuous flow operation.
The Airstream Electronic
Monitoring Control Sys-
tem showing different
LCD displays.
An over temperature condition has
occurred in the right side (left and
right as viewed from behind the
dryer) grain column causing the con-
trol to shut down the dryer. The mes-
sage indicates whether the problem
is in the lower or upper module. This
control is adjustable from 80°to
220°F, and automatically resets it-
self when cool.
OUT OF GRAIN
WARNING/UNLOAD
CLEANOUT
An over temperature condition has
occurred in the left side (left and right
as viewed from behind the dryer)
grain column causing the control to
shutdown the dryer. The message
indicates whether the problem is in
the lower or upper module. This con-
trol is set at 210°F and automatically
resets itself when cool.
The contacts in the air switch have
opened due to the fan not turning,
or the air switch may need adjust-
ment. The lowest fan is number one,
and the top fan would be number
four on a four fan dryer.
METERING ROLL DRIVE
SYSTEM FAILURE
LOWER OR UPPER
FIXED GRAIN HIGH
TEMPERATURE
FAN 1, 2, 3 OR 4 FAILURE
NO AIRFLOW

14
ELECTRICAL POWER
Turn on the electrical power supply
to the dryer, set all circuit breakers
to on, including the safety discon-
nect handle mounted on front of the
dryer's power panel.
CONTROL POWER
SWITCH
POWER START BUTTON
Push the dryer start button, and all
the selector switches on the control
panel will be activated.
FUEL CHECK
Turn the control power switch to on.
The switch will light up. A copyright
message, model number, total run-
ning time in hours and minutes, cur-
rent date and time will appear. At this
point the controller will lock out all
other dryer functions. Once the date
and time appear, press reset and the
dryer will perform its safety circuit
check. If a fault is found, the cause
will be displayed on the LCD. If all
are found safe, the controller will sup-
ply power to the electronic fuel shut-
off valve, if so equipped, and the dry-
ing mode switch will light up, indicat-
ing that the dryer is ready to be started.
If using LP gas, make sure the tank
has plenty of fuel and that the tank
does not have a regulator mounted
to it. If using natural gas, make sure
an adequate supply is available.
If using LP gas, slowly open the
main fuel supply valve at the tank.
If using natural, gas turn on the valve
along the supply line. Then, open the
Maxon electronic shut off valve, if
so equipped, or open the manual
shut off valve on the dryer to allow
fuel flow to the dryer. Inspect all gas
lines and connections for possible
leaks.
Any gas leaks must be fixed
immediately!
Moisture Control Switch-ON
Moisture Control Thermostat-MAXI-
MUM TEMPERATURE
Load Switch-OFF
Unload Switch-OFF
Fan Switches-OFF
Burner Switches-OFF
Out of Grain Timer-8 MINUTE
Load Delay-30 SECONDS
Unload Delay-30 SECONDS
Metering Roll Speed-LOW AND
HIGH SPEED SETTINGS PUT
ON ZERO
Dry Timer-60 MINUTE
Cool timer-20 MINUTE
Unload timer-10 SECONDS
Mode Switch-CONTINUOUS FLOW
The Maxon safety shut off valve.
DRYER PRE START CHECKS
PRE SEASON INSPECTION
INSPECT THE METERING
ROLLS
Open all metering roll access doors
and inspect each compartment for
any bolts, nuts or other foreign ma-
terial, that may cause possible jam-
ming of the metering rolls.
Before the dryer is filled, thoroughly
inspect the unit and check the op-
eration of the dryer as follows.
SET CONTROL SWITCHES
BEFORE ATTEMPTING TO
OPERATE THE DRYER MAKE
SURE ALL SAFETY SHIELDS
ARE IN PLACE, ALL BOTTOM
CLEANOUT AND REAR
ACCESS DOORS ARE CLOSED
AND ALL PERSONNEL ARE
CLEAR OF THE DRYER

15
DRYER PRE START CHECKS
iary is wired to the dryer, it should start
and rotate in the proper direction.
played. Press the dryer power stop
button to reset the panel, then press
the start button.
LOAD AUGER
ONE SPEED OPERATION
MOISTURE CONTROL
THERMOSTAT
To check the moisture control ther-
mostat leave the unloading switch
on one speed, and slowly turn down
the moisture control thermostat. As
the setting is decreased, the indica-
tor light should come on and the me-
tering rolls should stop operating.
The bottom auger will stop after the
30 second clean out delay, provid-
ing that the dryer is still being held
by the moisture control thermostat.
Rotate the moisture control thermo-
stat up to its maximum setting. The
light should go off, and the metering
rolls should restart along with the
bottom auger if it has stopped.
METERING ROLL
OPERATION
To check the metering roll operation
turn either the low speed or high speed
knob clockwise, and the metering roll
speed should increase. Turning ei-
ther knob counterclockwise will de-
With the grain supply shut off,
quickly bump the load auger switch
to manual, and see if the load auger
rotates clockwise as viewed from the
drive end, or counterclockwise if the
dryer is a front load model. If the wet
grain supply auxiliary is wired to the
dryer it should also rotate in the cor-
rect direction at this time. Turn the
load auger switch to the auto posi-
tion. The top auger and wet grain
supply auxiliary should run for one
minute, and then the dryer will shut-
down leaving the safety shutdown
message (out of grain warning) dis-
To check one speed operation
place the unload switch in the one
speed setting. Turn up the high
speed metering roll dial until the
metering rolls start rotating. The
bottom auger should rotate coun-
terclockwise as viewed from the
drive end. The metering roll drive
motor should rotate clockwise as
viewed from the drive end of the gear
box. If the dry grain take away auxil-
To check two speed operation move
the switch to the two speed position,
set low speed on 200 and high
speed on 600. Slowly turn the ther-
mostat until the moisture control
switch light comes on. The meter-
ing roll speed is now controlled by
the low speed dial. Turning the ther-
mostat the other way until the light
goes out leaves the metering rolls con-
trolled by the high speed dial.
The metering roll access area.
TWO SPEED OPERATION

16
DRYER PRE START CHECKS
FAN SWITCHES
purge delay of approximately 10
seconds. Gas pressure should be
shown on the gauge. At this time
adjust the burner hi-lo fire thermo-
stat to 200°F, causing the burner to
operate on hi-fire. The thermostat
is located on the front left side of the
dryer. Observe the gas pressure on
gauge, and turn the thermostat to its
minimum setting, causing the burner
to cycle into lo-fire. As the burner
thermostat is turned down the gas
pressure should also show a notice-
able drop, indicating that the hi-fire
solenoid is closed and the burner is
being supplied with less gas
through the low fire control valve.
At this time set the hi-fire and lo-
crease the speed. Make sure the
drive chain tension is properly ad-
justed and all sections of the meter-
ing rolls rotate. Turn the unload switch
off after these checks are complete.
The bottom auger will continue to run
for 30 seconds after the switch is
turned off to allow for cleanout.
Bump each fan switch, and observe
fan rotation. The fan should run
counterclockwise. Sometimes on
three phase models all motors will
run backwards. They can easily be
reversed by interchanging the two
of three power supply wires. Re-
verse the two outside wires, L1 and
L3, and leave the middle one in the
same position.
Note: If the dryer is empty, the
burners will not operate. The fans
cannot create enough static pres-
sure to engage the air switch. You
will receive a loss of airflow mes-
sage.
The dryer fan and heater controls featuring: 1-pressure regulator, 2-lo-fire
control valve, 3-high pressure solenoid, 4-low pressure solenoid, 5-hi-lo fire
thermostat (assembly includes thermometer), 6-fuel supply line, 7-LP
solenoid or supply ball valve(NG) and 8-air pressure switch.
fire pressure settings. Use the
pressure regulator for hi-fire and
the ball valve for lo-fire. The ther-
mostat should cycle between high
and low, approximately 4 to 5 times
per minute.
Approximate settings should be:
LP Gas Hi-Fire 6-15 lbs.
Lo-Fire 2-6 lbs.
Natural Gas Hi-Fire 6-10 lbs.
Lo-Fire 1-3 lbs.
If the burner remains on hi-fire
and does not cycle, increase the
regulator setting on the propane
models, or the supply valve on the
natural gas models in order to reach
the thermostat setting. If the burner
remains in lo-fire and does not cycle,
Test fire each burner by starting the
fan, and then turn the burner switch
to on. Turn on the fuel supply, and
the burner should ignite after a short
BURNER TEST FIRE
3
421
7
5
8
6
BURNER SAFETY
To check the burner safety function,
first make sure the main gas valve
is off. Turn the fan switch on and al-
low the fan to start. Then, turn the
heater switch on. The dryer will shut
down after 20 seconds. The safety
message, "Burner 1 warning flame
not detected" will appear. Repeat
test for each fan/heater unit.

17
DRYER PRE START CHECKS
In case of emergency push the dryer
power stop button. The fan, burner
and all augers will stop immediately.
To check the staged batch opera-
tion, turn the control power switch
to the on position. Press the reset
button, open the main fuel supply
valve at the tank on an LP dryer or
valve in the fuel supply line on a natu-
ral gas dryer. Turn the drying mode
switch to the staged batch position.
EMERGENCY
STAGED BATCH CHECK
All dryer functions should be checked before operation each season.
Turn on the electric shut off valve to
allow fuel flow to the dryer, if so
equipped. Turn the load switch to
auto and unload switch to one
speed. Push the dryer power start
button and the controller will sequen-
tially start all dryer components in
their proper order. If any switches
are not in their correct position for
staged batch operation, the dryer will
indicate improper switch position,
and will not start until the switches
are in the proper position. After start-
ing, all batch timers will time down
in sequence. When the unload cycle
is complete the timers will automati-
cally reset to their original settings,
and start the dry timer again.
slightly decease gas pressure with
the lo-fire control valve. If the gas
pressure is decreased too much a
popping or fluttering sound will be
heard. Also, anytime the high pres-
sure side is adjusted the low pres-
sure side needs to be checked. Re-
peat the test for each fan/heater unit.
DRYER SHUTDOWN
To shut down the dryer, first close
the fuel supply valve at the tank or
valve along the fuel line. If the
burners are operating, let the dryer
run out of fuel, and it will shutdown
automatically due to loss of flame.
Close the fuel valve at the dryer,
and press the dryer power stop
button. Turn off the safety discon-
nect handle on the front of the
power box, and turn off the main
power to the dryer.

18
DRYER START UP & OPERATION
At the beginning of each harvest and
before filling the dryer with grain
make sure to inspect the dryer for
rodent damage, proper belt and
chain tension and missing or dam-
aged safety shields. Test operate
the dryer using the prestart check
procedures located on pages 14-17.
1. Before attempting to operate the
dryer make sure that all safety
shields are in place, all plenum
bottom closure panel doors are
closed, all rear access doors are
closed and all personnel are
clear of the grain dryer and grain
handling machinery.
2. Turn all selector switches on the
control panel to the off position.
3. Turn on the electric power sup-
ply to the dryer, and move the
safety disconnect handle mounted
on the dryer's upper power box
to on.
4. Turn the control power switch to
on. The switch will light up. A
copyright message, model num-
ber, total running time in hours
and minutes, current date and
time will appear. At this point the
controller will lock out all other
dryer functions. Once the date
and time appear, press reset,
and the dryer will perform its
safety circuit checks. If a fault
is found the cause will be dis-
played on the LCD. If all are
found safe the controller will
1. Turn the control power switch to on.
2. After the date and time appear
on screen, press the reset button.
3. Push the dryer power start switch.
4. Open the main fuel supply valve
on the tank if using LP gas, or
open the fuel supply line if us-
ing natural gas. Turn on the
Maxon electric shut off valve,
if so equipped, or open the manual
shut off valve to allow fuel flow to
the dryer.
5. Turn the drying mode switch to
continuous flow.
CONTINUOUS FLOW
OPERATION
allow the electronic fuel shutoff
valve to be manually opened
(if so equipped), and the dry-
ing mode switch will light up,
indicating that the dryer is ready
to be started.
5. Move the load auger switch to
manual, and push the dryer
power start switch. The top au-
ger will immediately start, and
the load auger switch will light
up. If additional grain handling
equipment is wired to the dryer
it will also start immediately.
6. When the dryer is full of grain the
top auger will stop automatically,
and any grain handling equipment
wired to the dryer will also stop.
6. The dryer should already be
filled with grain. Turn the load
auger switch to the auto posi-
tion. In both the auto and manual
positions the dryer grain level
switch will automatically keep
the dryer full of grain. In the auto
position the dryer will shut down
after a preset time period on the
out of grain timer.
7. Turn each fan switch to on.* The
fan will start, and the switch will
light up when airflow is detected.
8. Start each burner by turning
the heater switch to on.* After
purging for approximately 10
seconds the burner will fire, and
the heater switch will light up.
This indicates that the flame
sensing circuit is sensing burner
flame. For information concerning
burner adjustment see the pre start
section of this manual.
9. Operate the heaters to dry grain for
6-7 minutes per point of moisture
to be removed with the plenum tem-
perature set at 180°F. Example:
Shelled corn starts with 25% mois-
ture and the final moisture content
is to be 15% (10% removal). Us-
ing the all heat dryeration process,
the estimated drying time is 60 min-
utes (10 x 6).
CONTINUOUS FLOW AND CONTINUOUS BATCH START UP PROCEDURE
*For all heat operation, all fans and burners
are on. For dry and cool operation, the bot-
tom burner is usually off. Depending on
grain and/or weather conditions, it may be
necessary to turn the bottom two burners
off to provide adequate grain cooling. Al-
though the moisture control changes auto-
matically, it may need some adjustment.

19
DRYER START UP & OPERATION
2200 SERIES CONTINUOUS FLOW METERING ROLL SETTINGS
Initial
Moisture
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%
31%
32%
33%
34%
35%
2 Speed
High
999
999
999
999
923
746
615
524
467
412
380
359
334
313
292
271
255
239
225
Approx.
Dry Time
Moisture
Removed
Full Heat
2 pts.
3 pts.
4 pts.
5 pts.
6 pts.
7 pts.
8 pts.
9 pts.
10 pts.
11 pts.
12 pts.
13 pts.
14 pts.
15 pts.
16 pts.
17 pts.
18 pts.
19 pts.
20 pts.
1 Speed
999
923
746
615
524
467
412
380
359
334
313
292
271
255
239
225
213
202
194
2 Speed
Low
615
524
467
412
380
359
334
313
292
271
255
239
225
213
202
194
186
178
170
16 min.
21 min.
26 min.
31.5 min.
37 min.
41.5 min.
47 min.
51 min.
54 min.
58 min.
62 min.
66.5 min.
71.5 min.
76 min.
81 min.
86 min.
91 min.
96 min.
100 min.

20
DRYER START UP & OPERATION
2200 SERIES CONTINUOUS FLOW METERING ROLL SETTINGS
Initial
Moisture
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%
31%
32%
33%
34%
35%
2 Speed
High
850
750
650
560
420
336
288
252
224
201
183
168
155
144
134
126
119
112
106
Approx.
Dry Time
Moisture
Removed
Dry & Cool
2 pts.
3 pts.
4 pts.
5 pts.
6 pts.
7 pts.
8 pts.
9 pts.
10 pts.
11 pts.
12 pts.
13 pts.
14 pts.
15 pts.
16 pts.
17 pts.
18 pts.
19 pts.
20 pts.
1 Speed
560
420
336
288
252
224
201
183
168
155
144
134
126
119
112
106
101
096
092
2 Speed
Low
288
252
224
201
183
168
155
144
134
126
119
112
106
101
096
092
088
084
080
18 min.
24 min.
30 min.
35 min.
40 min.
45 min.
50 min.
55 min.
60 min.
65 min.
70 min.
75 min.
80 min.
85 min.
90 min.
95 min.
100 min.
105 min.
110 min.