Airstream PNEG-343 User Manual

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R A I N

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O N D I T I O N I N G

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Y S T E M S

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DRYER OPERATION

A N D S E R V I C E M A N U A L

PNEG-343

1300 SERIES

THREE FAN PORTABLE

DRYER MODELS

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2

1300 SERIES DRYER OPERATION AND SERVICE

TABLE OF CONTENTS

Warranty.......................................................................................................................4

Safety First...................................................................................................................5

Safety Alert Decals.......................................................................................................6

Safety Precautions.......................................................................................................7

Dryer Control Panel Featuring The Electronic Monitoring Control................................8

Safety Circuit Shutdown Messages.....................................................................13

Dryer Pre Start Checks...............................................................................................14

Pre Season Inspection..........................................................................................14

Dryer Start Up & Operation.........................................................................................18

Continuous Flow And Continuous Batch Start Up Procedures............................18

Continuous Flow Metering Roll Settings...............................................................19

Fan & Heater Switch Settings...............................................................................22

Batch Timer Settings............................................................................................23

Staged Auto Batch Timer Settings.......................................................................24

1300 Series Dryer Service Guide.....................................................................................25

Seasonal Inspection And Service.........................................................................26

Suggested Lubricants...........................................................................................27

Fan Propellor Removal And Installation...............................................................28

Fan Motor Removal And Installation.....................................................................29

Heater Parts Removal And Installation................................................................30

Metering Roll Servicing........................................................................................31

How To Determine A Metering Roll Problem.......................................................32

1300 Series Wiring Diagrams.....................................................................................33

Trouble Analysis Procedure........................................................................................44

Quick Reference Guide..............................................................................................49

Notes...........................................................................................................................50

3

1300 SERIES DRYER OPERATION AND SERVICE

Thank you for choosing an Air­stream Grain Dryer. This dryer is
one of the finest ever built. It is
designed to give excellent perfor­mance and service for many years.

Grain Systems, Inc. warrants its
products to be free of defects in ma­terial 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 defec­tive, the components will be repaired
or replaced without charge, this con­stituting and entirely fulfilling the
warranty obligation. Grain Systems,
Inc. assumes no liability for ex­penses incurred without written au­thorizations; in no event shall liabil-

This manual describes the op­eration and service for all standard
production 1300 series three fan
grain dryers. These models are
available for liquid propane

WARRANTY

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 mo­tors, tires, and other components
supplied by outside manufacturers
have separate warranties, from
those suppliers. This warranty is ex­clusive and in lieu of all other war­ranties, expressed or implied. Grain
Systems, Inc. reserves the right to
make design or specification

or natural gas fuel supply, with
either single phase 230 volt, or
three phase 220 or 440 volt elec­trical power.

changes at any time, without any
contingent obligations to purchasers
of products already sold.

All instructions shall be con­strued as recommendation only.
Because of the many variable con­ditions in actual installation, Grain
Systems, Inc. assumes no liability
for results arising from the use of
such recommendations. Any alter­ation in design or operation of any
Grain Systems, Inc. product must be
submitted and approved in writing by
Grain Systems, Inc. before the al­teration is made.

Airstream Service Technician checks the wiring on a single module grain dryer.

4

SAFETY FIRST

Grain Systems, Inc.'s principle con­cern is your safety and the safety of
others associated with grain han­dling equipment. This manual was
written with that thought in mind. We
want to keep you as a customer.
This manual is to help you under-

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 per­sonal injury or death.

stand safe operating proceedures
and some problems which may be
encountered by the operator and
other personnel.

As owner and/or operator, it is
your responsibility to know what re­quirements, hazards and precau-

SAFETY ALERT SYMBOL

WARNING! BE ALERT!

Personnel operating or working around a
dryer should read this manual. This
manual must be delivered with equipment
to its owner. Failure to read this manual
and its safety instructions is a misuse of
the equipment.

tions exist, and to inform all person­nel 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.

Grain Systems, Inc. recommends
that you contact your local power com­pany and have a representative sur­vey your dryer installation so your wir­ing will be compatible with their sys­tem and you will have adequate power
supplied to your unit.

SAFETY ALERT DECALS

A CAREFUL OPERATOR

IS THE BEST INSURANCE

AGAINST AN ACCIDENT

Safety decals should be read and
understood by all people in and
around the dryer area. If the follow­ing safety decals are not displayed
on your dryer, or if they are dam­aged, contact Grain Systems, Inc.
for replacement.

5

SAFETY ALERT DECALS

Three decals displayed on all Airstream Dryers. Belt drives, chain driven meter rolls

and combustible fuels must be treated with caution.

6

SAFETY PRECAUTIONS

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 fur­ther 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
ing procedures. Do not exceed maxi
perature.

7. Keep the dryer clean. Do not allow fine material to accumulate in the ple­num chamber. Also occasionally clean the outside screens of the dryer.

8.

Keep auger drive belts tight

when burner is in operation. See chart for operat-

mum recommended drying tem-

enough to prevent slippage.

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 safeguarded
against, without interfering with effi­cient operation and reasonable ac­cess to components.

Use extreme caution in working
around high speed fans, gas fired
heaters, augers and auxiliary con­veyors, which may start without
warning when the dryer is operating
on automatic control.

KEEP THE DRYER CLEAN

DO NOT ALL OW FINE

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.

READ THESE INSTRUCTIONS

BEFORE OPERA TION AND SERVICE

SA VE FOR FUTURE REFERENCE

MA TERIAL TO ACCUMULATE

IN THE PLENUM CHAMBER

OR SURROUNDING THE

OUTSIDE OF THE DRYER

Continued safe, dependable opera­tion of automatic equipment de­pends, to a great degree, upon the
owner. For a safe and dependable
drying system, follow the recom­mendations within this manual, and
make it a practice to regularly in­spect the operation of the unit for any
developing problems or unsafe con­ditions.

Take special note of the safety
precautions listed above before at­tempting to operate the dryer.

7

DRYER CONTROL PANEL

Figure 1: The grain dryer control panel with the Electronic Monitoring Control System in the upper right panel.

DRYER CONTROL PANEL FEATURING

THE ELECTRONIC MONITORING CONTROL SYSTEM

The control panel provides easy access
to gauges and controls, and the illumi­nated switches provide a quick reference
for every operating function. The patent
pending Electronic Monitoring Con­trol System is a computerized con­trol system that gives instant

8

information regarding dryer operation.

MOISTURE CONTROL

THERMOSTAT

This electronic thermostat controls
the moisture level of discharged
grain by sensing grain column tem­perature.

MOISTURE CONTROL

SWITCH

This switch turns the power on or
off to the moisture control thermo­stat. It lights up when the grain col­umn temperature is below the ther­mostat set point.

DRYER CONTROL PANEL

CONTROL POWER

SWITCH

The power to the Electronic Moni­toring Control System is turned on
or off with this switch.

OUTSIDE LIGHT

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.

DRYING MODE SWITCH

This is used to select staged batch
or continuous flow drying. The
switch will light only after the Elec­tronic Monitoring Control System
has been turned on, the safety cir­cuit is okay and the reset button
on the control panel has been
pressed.

LOAD AUGER SWITCH

This is used to select the opera­tion 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, or 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).

FAN SWITCHES

Each fan is turned on or off with
this switch. The on position oper­ates 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.

HEA TER SWITCHES

Each burner is turned on or off with
this switch. The auto position op­erates the burner in staged batch
during the dry cycle. The on posi­tion will operate the burner only
when the fan is running. The
switch will light up only when the
flame sensor detects the flame.

UNLOAD SWITCH

The unload switch turns the meter­ing rolls and discharge auger on or
off, and selects the operation of the
metering rolls.

• In the 2 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 set­ting depending on the control signal
from the moisture control thermo­stat. The discharge auger will oper­ate continuously.

• In the 1 speed position, if the mois-

ture control switch is on, and the dry
ing mode switch is turned to cont.
flow, the metering roll speed will op­erate at the high speed metering roll
potentiometer setting or turn off de­pending 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 posi­tion. The discharge auger and
metering rolls will only operate
during the unload cycle of the
staged batch operation, and the
speed of the metering rolls is ad­justed using the high speed me­tering roll potentiometer.

(Note: If the unload auxiliary
motor overload relay is being uti­lized in the dryer control panel, this
switch will also control the opera­tion of the auxiliary equipment.)

LOW SPEED METERING

ROLL POTENTIOMETER

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.

9

DRYER CONTROL PANEL

HIGH SPEED METERING

ROLL POTENTIOMETER

This is used to:

• Set the high speed of the metering roll
when the two speed automatic mois­ture control feature of the dryer is uti­lized.

• Set the speed of the metering rolls
when the one speed automatic mois­ture control feature of the dryer is uti­lized.

• 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.

DRYER POWER

START SWITCH

This switch starts and operates the
dryer based on switch settings. If
other switch settings are in the off
position, individual dryer compo­nents can be operated by turning the
drying mode switch to continuous

flow, pressing the dryer power start
button and then turning on the de­sired dryer component.

DRYER POWER

STOP SWITCH

This switch stops all dryer func­tions. If an automatic dryer shut­down occurs, first determine and
correct the cause of the shutdown.
Then, press the dryer power stop
button to reset the dryer before
restarting.

10

The Airstream Dryer Control Panel mounted on the dryer.

DRYER CONTROL PANEL

ELECTRONIC

MONITORING CONTROL

SYSTEM

The Electronic Monitoring Control
System (Figure 2) controls all tim­ing functions and safety circuit
checks. It is designed to simplify
dryer operation by providing printed
messages and warnings on its liq­uid crystal display (LCD).

TURNING ON THE

ELECTRONIC

MONITORING CONTROL

SYSTEM

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.

SETTING THE DRY, COOL,

BATCH AND UNLOAD

TIMERS

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 cur­rent setting on these three timers is dis­played directly above each 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

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 setting if
the reset button is pushed.

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
preset on the timer. When pressed, the
display will show the amount of time left
on the timer and the percentage of time
used by the last load. A second screen
will appear with the timer's setting, and
may be modified as described in the
batch timer section.

Figure 2: The Airstream Electronic Monitoring Control System

11

DRYER CONTROL PANEL

The Airstream Electronic Monitoring Control System showing several different LCD displays.

SETTING THE LOAD AND

UNLOAD DELAYS

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 au­ger runs after the metering rolls stop
to allow for auger cleanout. Both the
load and unload delays are set us­ing the same procedure as the tim­ers. The aux 1 and aux 2 delays are
presently not being used.

UTILIZING THE

BUSHEL COUNTER

When operating the dryer the LCD
display will show the dryer mode of
operation on the first line, the bush­els per hour or the metering roll rpm
on the second line and the total

bushels dried on the third line. By
pressing the bph/rpm/total bu but­ton the second line will alternate
between the metering roll rpm's or
the bushel per hour rate. The to­tal bushels dried reading is the to­tal 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 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 remain­ing 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 dis­played 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 in­formation, hold the reset button in for
five seconds. The procedure for re­viewing the safety circuit shutdown log
will be displayed on the LCD display.

12

DRYER CONTROL PANEL

SAFETY CIRCUIT SHUTDOWN MESSAGES

BURNER 1, 2 OR 3 VAPOR

HIGH TEMPERA TURE

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. This sensor is
set at 200°F and automatically resets
itself when cool. The message will dis­tinguish between burner 1 and 2.

BURNER 1, 2 OR 3 W ARNING

FLAME NOT DETECTED

The flame sensor has failed to de­tect a burner flame indicating that the
burner has failed to light, there is a
problem with the flame sensing cir­cuitry or the dryer is not getting
burner fuel. The message will dis­tinguish between burner 1 and 2.

FAN 1, 2 OR 3 HOUSING

HIGH TEMPERATURE

The temperature high limit located
on the fan/burner housing has
opened, indicating an over tempera­ture condition has occurred towards
the rear of the fan/heater housing.
This control is set at 200°F and must
be manually reset. The message will
distinguish between fan 1 and 2.

BURNER 1, 2 OR 3 SHUT-

DOWN LOSS OF AIRFLOW

The contacts in the air switch have
opened due to insufficient airflow for the
burner to operate. The message will dis­tinguish between burner 1 and 2.

GRAIN DISCHARGE

W ARNING

The lid on the grain discharge box
has opened, indicating that grain is
not being taken away fast enough
at the discharge box.

LOWER ADJUSTABLE

GRAIN HIGH

TEMPERATURE

An over temperature condition has oc­curred in the right side (left and right as
viewed from behind the dryer) grain col­umn causing the control to shut down
the dryer. This control is adjustable
from 80° to 220°F, and automatically
resets itself when cool.

LOWER FIXED GRAIN

HIGH TEMPERATURE

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. This control is set at 210°F and
automatically resets itself when cool.

MOTOR OVERLO AD

One of the thermal overloads on ei­ther the fan, load, unload or auxil­iary motors has opened, indicating
an overcurrent condition. The over­loads must be manually reset.

OUT OF GRAIN WARNING/

UNLOAD CLEANOUT

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 it is
in continuous flow operation.

12 VOLT POWER

SUPPLY WARNING

The right circuit breaker on the input/
output board has tripped.

L1 VOLTAGE LOST

The left circuit breaker located on
the input/output board of the Elec­tronic Monitoring Control System
has tripped, or one of the hardware
timers has shut down the dryer.

METERING ROLL DRIVE

SYSTEM FAILURE

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 turn­ing, or the sensor has been damaged.

LEFT METERING ROLL

FAILURE

The left (as viewed from behind the
dryer) metering roll has stopped turn­ing, or the sensor has been damaged.

PLENUM 1, 2 OR 3 HIGH

TEMPERATURE

An over temperature condition has
occurred inside the dryer plenum.
This control is a 300°F limit and au­tomatically resets itself when cool.
The message will distinguish be­tween plenum 1 and 2.

AUXILIARY SAFETY

SHUTDOWN

A shutdown has occurred due to an
auxiliary installed safety feature.

FAN 1, 2 OR 3 FAILURE

NO AIRFLOW

Contacts in the air switch have opened
due to the fan not turning, or the air switch
may need adjustment. The message will
distinguish between fan 1 and 2.

FAN 1, 2 OR 3 CANNOT

START CHECK AIR SWIT CH

The air switch contacts have closed
prior to the fan starting, indicating a
freewheeling blade or improper set­ting of the air switch. The message
will distinguish between fan 1 and 2.

13

Before the dryer is filled, thoroughly
inspect the unit and check the op­eration of the dryer as follows.

INSPECT THE METERING

ROLLS

Open all metering roll access doors
and inspect each compartment for
any bolts, nuts or other foreign ma­terial, that may cause possible jam­ming of the metering rolls.

BEFORE A TTEMPTING TO

OPERA TE THE DRYER MAKE

DRYER PRE START CHECKS

PRE SEASON INSPECTION

SURE ALL SAFETY SHIELDS

ARE IN PLACE, ALL BOTTOM

CLEANOUT AND REAR

ACCESS DOORS ARE CLOSED

AND ALL PERSONNEL ARE

CLEAR OF THE DRYER

SET CONTROL SWITCHES

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

14

The Maxon safety shut off valve.

ELECTRICAL POWER

Turn on the electrical power supply
to the dryer; set all circuit breakers
to on, including the safety discon­nect handle mounted on front of the
dryer power panel.

CONTROL POWER

SWITCH

Turn the control power switch to on.
The switch will light up. A copyright
message, model number, 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
check. If a fault is found, the cause
will be displayed on the LCD. If all
are found safe, the controller will sup­ply power to the electronic fuel shut­off valve, if so equipped, and the dry­ing mode switch will light up, indicat­ing that the dryer is ready to be started.

POWER START BUTTON

Push the dryer start button, and all
the selector switches on the control
panel will be activated.

FUEL CHECK

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
electronic shut off valve (Maxon
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!

DRYER PRE START CHECKS

iary is wired to the dryer, it should start
and rotate in the proper direction.

MOISTURE CONTROL

THERMOSTAT

To check the moisture control ther­mostat leave the unloading switch
on one speed, and slowly turn down
the moisture control thermostat. As
the setting is decreased, the indica­tor light should come on and the me­tering rolls should stop operating.
The bottom auger will stop after the
30 second clean out delay, provid­ing that the dryer is still being held
by the moisture control thermostat.
Rotate the moisture control thermo­stat 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.

The metering roll access area.

LOAD AUGER

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 cor­rect direction at this time. Turn the
load auger switch to the auto posi­tion. The top auger and wet grain
supply auxiliary should run for one
minute, and then the dryer will shut­down leaving the safety shutdown
message (out of grain warning) dis-

played. Press the dryer power stop
button to reset the panel, then press
the start button.

ONE SPEED OPERATION

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 coun­terclockwise 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-

TWO SPEED OPERATION

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 ther­mostat until the moisture control
switch light comes on. The meter­ing roll speed is now controlled by
the low speed dial. Turning the ther­mostat the other way until the light
goes out leaves the metering rolls con­trolled by the high speed dial.

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 ei­ther knob counterclockwise will de-

15

DRYER PRE START CHECKS

crease the speed. Make sure the
drive chain tension is properly ad­justed and all sections of the meter­ing 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.

FAN SWITCHES

Bump each fan switch and observe
the fan rotation. The fan should run
counterclockwise. Sometimes on
three phase models all motors will
run backwards. They can easily be
reversed by interchanging two of the
three power supply wires. Reverse
the two outside wires, L1 and L3,
and leave the middle one in the
same position.

Note: If the dryer is empty, the
fans or burners will not operate. The
fans cannot create enough static
pressure to engage the air switch.
You will receive a loss of airflow
message.

BURNER SAFETY

To check the burner safety function, first
make sure the main gas valve is off. Turn
the fan switch on and allow the fan to
start. Then, turn the heater switch on
for that fan. The dryer will shut down
after 20 seconds. The safety message,
"Burner 1 warning flame not detected"
will appear. Restart dryer and repeat for
each fan/heater.

purge delay of approximately 10
seconds. Gas pressure should be
shown on the gauge. At this time
adjust the burner hi-lo fire thermo­stat to 200°F, causing the burner to
operate on hi-fire. This 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 notice­able 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-

3

9

4

2

1

fire pressure settings. Use the
pressure regulator for hi-fire and
the ball valve for lo-fire. The ther­mostat 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,

7

5

8

6

BURNER TEST FIRE

Test fire each burner by starting the
fan. Then, turn the burner switch to
on. Turn on the fuel supply, and the
burner should ignite after a short

16

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, 6-fuel supply line, 7-LP solenoid or supply ball valve(NG),

8-air pressure switch and 9-liquid filled gauge.

DRYER PRE START CHECKS

All dryer functions should be checked before operation each season.

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 pres­sure side is adjusted, the low pres­sure side needs to be checked. Re­peat the test for each fan/heater unit.

STAGED BATCH CHECK

To check the staged batch opera­tion, turn the control power switch
to the on position. Turn the drying
mode switch to the staged batch 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 natural gas dryer.

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 se­quentially 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 start­ing, all batch timers will time down
in sequence. When the unload cycle
is complete the timers will automati­cally reset to their original settings,
and start the dry timer again.

DRYER SHUTDOWN

To shut down the dryer, first close
the fuel supply valve at the tank or
valve along the fuel line. If the
burner is operating, let the dryer
run out of fuel, and it will shut down
automatically due to loss of flame.
Close the fuel valve at the dryer,
and press the dryer power stop
button. Turn off the safety discon­nect handle on the front of the
power box, and turn off the main
power to the dryer.

EMERGENCY

In case of emergency push the dryer
power stop button. The fan, burner
and all augers will stop immediately.

17

DRYER START UP

CONTINUOUS FLOW AND CONTINUOUS BATCH START UP PROCEDURE

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 dam­aged 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 sup­ply 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 num­ber, 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 dis­played on the LCD. If all are
found safe the controller will

18

allow the electronic fuel shutoff
valve to be manually opened
(if so equipped), and the dry­ing 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 au­ger 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.

CONTINUOUS FLOW

OPERATION

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 us­ing 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.

6. The dryer should already be
filled with grain. Turn the load
auger switch to the auto posi­tion. 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 the fan switch to on. The
fan will start, and the switch will light
up when airflow is detected.

8. Start the 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.
information concerning
adjustment see the pre start
section of this manual.

9. Operate the heaters to dry grain
6-7 minutes per point of
to be removed with
perature set
Shelled corn
ture and
is to be 15%
ing the all heat dryeration process,
the estimated drying time is 60 min­utes (10 x 6).

10. While operating the dryer adjust the
metering roll dials to the recom­mended settings. See the charts on
page 19 and 20.

the final moisture content

the plenum tem-

at 180°F. Example:

starts with 25% mois-

(10% removal). Us-

For

burner

for

moisture

DRYER START UP & OPERATION

1300 SERIES CONTINUOUS FLOW METERING ROLL SETTINGS

Full Heat

Initial

Moisture

Moisture

Removed

Approx.

Dry Time

1 Speed

2 Speed

Low

2 Speed

High
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%

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 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.

625
476
385
317
270
241
213
196
185
172
161
150
140
132

317
270
241
213
196
185
172
161
150
140
132
123
116
110

875
775
675
575
476
385
317
270
241
213
196
185
172

161
31%
32%
33%
34%
35%

These are approximate starting points.

16 pts.
17 pts.
18 pts.
19 pts.
20 pts.

81 min.
86 min.
91 min.
96 min.

100 min.

123
116
110
104
100

104
100
096
087
082

150

140

132

123

116

19

Initial

Moisture

DRYER START UP & OPERATION

CONTINUOUS FLOW METERING ROLL SETTINGS*

Dry & Cool

Moisture

Removed

Approx.

Dry Time

1 Speed

2 Speed

Low

2 Speed

High
17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%
28%
29%
30%

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.

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.

363
272
218
187
163
145
131
119
109
101
093
087
082
077

187
163
145
131
119
109
101
093
087
082
077
073
069
065

650
550
450
363
272
218
187
163
145
131
119
109
101

093
31%
32%
33%
34%
35%

These are approximate starting points.

16 pts.
17 pts.
18 pts.
19 pts.
20 pts.

90 min.

95 min.
100 min.
105 min.
110 min.

073
069
065
062
059

061
057
053
049
045

087
082
077
073
069

20

DRYER START UP

11. To move grain through the dryer
turn the moisture control switch
to on. The switch will light up.
Note: When the unload switch

is in the 2 speed position, and the
moisture control thermostat switch
is off, the speed of the metering rolls
can be manually adjusted by turn­ing the high speed metering roll dial.
Turning the dial clockwise will in­crease the grain discharge rate,
counterclockwise will decrease the
discharge rate. (The numbers on the
speed dials indicate the percentage
of full speed.)

12. At the end of the startup period,
start the flow of grain out of the
dryer. Turn the unload switch to
the two speed position. The bot­tom auger and metering roll will
immediately start, and the un­load switch will light. If additional
grain handling equipment is uti­lizing the unload auxiliary over
load supplied with the
this equipment will also imme­diately start.

13.

To shut the dryer down,
the fuel supply valve at the fuel
tank or fuel source. Let the dryer
run until the fuel supply lines
drain, and the dryer automati­cally shuts down due to loss of
flame. Close the fuel valve at the
dryer. Press the dryer power
stop button. Turn off the dryer's
safety disconnect handle. Turn off
the main power supply to the dryer.

14. In case of emergency push the
dryer stop button. The fan,

dryer,

close

burner and all augers will stop
immediately.

Note: The Electronic Monitor­ing Control System can be used to
automatically start the dryer. Place
all the control panel selector
switches in the proper position,
and open the electric fuel shut off
valve before pressing the dryer
power start button. The controller
will start all dryer components in
their proper order.

STAGED BATCH

OPERATION

1. Turn the control power switch to on.

2. Make sure the drying mode switch
is turned to staged batch.

3. After the date and time appear,
press the reset button.

4. Open the main fuel supply valve
on the tank if using LP gas, or
the valve in the fuel supply line
if using 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. The dryer should already be
filled with grain. Turn the load
auger switch to auto. In both the
auto and manual position, the
grain level switch will automati­cally keep the dryer full of grain.
In the auto position the dryer will
shut down after the preset time
period on the out of grain timer,
or if the grain flow to the dryer is
interrupted.

6. Turn the fan switch to auto. The
fan will start, and the switch will
light up when airflow is detected.

7. Start the burner by turning the
heater switch to auto. After purg­ing for approximately 10 sec­onds the burner will fire, and the
heater switch will light up indi­cating that the flame sensing
circuit is sensing burner flame.
For information concerning
burner adjustment see the pre­start section of this manual.

8. To properly set the correct dry,
cool and unload time for various
moisture content grains. See the
charts on page 23 and 24.

9. If the dryer is being operated in
all heat, turn the fan switch to
on. In this position the fan will
run continuously during the dry,
cool and unload stages of the
staged batch operation. If the
dryer is being operated in the
dry and cool mode, the preferred
position for the fan switch is the
on position, so the fan will run con­tinuously. If desired, the fan can
be turned off during the unload
cycle of the dry-cool-unload se­quence by turning the fan switch
to auto.

10. If the dryer is being operated in
all heat, turn the heater switch
to on. The burner will operate
whenever the fan is operating.
If the dryer is being used in dry
and cool, turn the heater switch
to auto and the burner will auto-

21

DRYER START UP & OPERATION

matically shut down during the
cooling and unloading cycles.

11. Turn the unload switch to the
one speed position. The bottom
auger and metering rolls will
start automatically during the
unload cycle of the dry-cool-un­load mode, along with any grain
handling equipment that is wired
to the dryer. The speed at which
the metering rolls operate during the
unload cycle is adjusted by using
the high speed metering roll knob.
Turning the dial clockwise will in­crease the grain discharge rate, and
counterclockwise will decrease the
discharge rate.

12. To control the length of the dry
cycle using only the dry time

setting programmed into the
system, turn the moisture con­trol setting to off. To use the au­tomatic moisture control so that
the dry time is determined, not
only by the dry time setting, but
also by the moisture content of
the drying grain, turn the mois­ture control switch to on, and set
dial to a beginning setting of 135°F.

13. To start the drying operation
push the dryer power start but­ton. The controller will start all
the dryer components in their
proper order. If any of the se­lected switches are improperly
positioned for staged batch dry
ing, the display will indicate the
proper switch position, and will not
allow the dryer to operate until

the position of the switch is cor­rected.

14. To shutdown the dryer, close the
fuel supply valve at the fuel tank
or fuel source. If the burners are
operating, let the dryer run out
of fuel causing an automatic
shutdown due to a loss of flame.
Close the fuel valve at the dryer,
and press the dryer power stop
button. Turn off the dryer's main
circuit breaker located on the
front of the power panel. Turn
off the main power supply to the
dryer.

15. In case of an emergency, press
the dryer power stop button. The
burners, fans and all augers will
stop immediately.

STAGED BATCH FAN & HEATER SWITCH SETTINGS

Fan Setting

Auto

Auto

On
On

At the end of the dry cycle in staged batch, the fans and heaters will continue running if in the Auto-Auto setting, until the

Heater Setting

Auto

On

On

Auto

preset temperature on the moisture control thermostat is reached.

Fans stay on during dry and cool

Fans stay on during dry and cool

Fan Function

cycle only

cycle only
Fans are on continuously
Fans are on continuously

Burners stay on during dry timer cycle

Burners stay on during dry and cool

Burners shut down at the end of the

Heater Function

only

Burners are on continuously

dry cycle

22

DRYER START UP & OPERATION

1300 SERIES BATCH TIMER SETTINGS

Initial

Moisture

17%
18%
19%
20%
21%
22%
23%
24%
25%
26%
27%

Moisture

Removed

2 pts.
3 pts.
4 pts.
5 pts.
6 pts.
7 pts.
8 pts.

9 pts.
10 pts.
11 pts.
12 pts.

Full Heat

Fan & Burner Switche(s) on Manual

Approx.

Dry Time

16 min.
21 min.

26 min

31.5 min.
37 min.

41.5 min.
47 min.
51 min.
54 min.
58 min.
62 min.

Dry

6 min.

11 min.

16 min

21.5 min.
27 min.

31.5 min.
37 min.
47 min.
44 min.
48 min.
52 min.

Cool

Dry & Cool

Fan(s) on Manual Burner(s) on Auto

Approx.

Unload*
0
0
0
0
0
0
0
0
0
0
0

10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.

Dry Time

18 min.
24 min.

30 min
35 min.
40 min.
45 min.
50 min.
55 min.
60 min.
65 min.
70 min.

Dry
18 min.
24 min.

30 min
35 min.
40 min.
45 min.
50 min.
55 min.
60 min.
65 min.
70 min.

Cool
18 min.
18 min.

18 min
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.

Unload*

10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.

10 min.
28%
29%
30%
31%
32%
33%
34%
35%

These are approximate starting points.
*Set unload meter roll high speed setting to 999. If unload equipment cannot adequately keep up, lower the speed setting
and add time to the unload timer setting to completely unload the batch. In full heat mode, the time added to the unload
timer will need to be substracted from the dry timer. If fan is on auto and does not run during unload, set cool timer to 25
minutes.

New unload time calculation = present unload time " new dial setting

13 pts.
14 pts.
15 pts.
16 pts.
17 pts.
18 pts.
19 pts.
20 pts.

Example

66.5 min.

71.5 min.
76 min.
81 min.
86 min.
91 min.
96 min.

100 min.

13.75 = 11 ÷ 800

56.5 min.

61.5 min.
66 min.
71 min.
76 min.
81 min.
86 min.
90 min.

1000

0
0
0
0
0
0
0
0

1000

10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.

75 min.
80 min.
85 min.
90 min.

95 min.
100 min.
105 min.
110 min.

75 min.
80 min.
85 min.
90 min.

95 min.
100 min.
105 min.
110 min.

18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.

10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.
10 min.

23

DRYER START UP & OPERATION

1300 SERIES STAGED BATCH TIMER SETTINGS

Initial

Moisture

17%
18%
19%
20%
21%

22%
23%
24%
25%

Moisture

Removed

2 pts.
3 pts.
4 pts.
5 pts.
6 pts.

7 pts.
8 pts.
9 pts.

10 pts.

Full Heat

Fan & Burner Switch(s) on Manual

Approx.

Dry Time

16 min.
21 min.

26 min

31.5 min.
37 min.

41.5 min.
47 min.
51 min.
54 min.

Dry

2 min.

3.5 min.

5.5 min
7 min.
9 min.

same

10.5 min.

12.5 min.

13.5 min.

14.5 min.

Cool

0
0
0
0
0

0
0
0
0

Unload*

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

Dry & Cool

#2 Fan on Manual #2 Burner on Auto

#1 Fan on Manual #1 Burner on Off

Approx.

Dry Time

18 min.
24 min.

30 min
35 min.
40 min.

#2 Fan on Manual #2 Burner on Manual

#1 Fan on Auto #1 Burner on Auto

45 min.
50 min.
55 min.
60 min.

Dry

9 min.
12 min.
15 min.

17.5 min.
20 min.

.5 min.

2.5 min.
4 min.

5.5 min.

Cool
3 min.
3 min.

3 min
3 min.
3 min.

18 min.
18 min.
18 min.
18 min.

Unload*

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.
26%
27%
28%
29%
30%
31%
32%
33%
34%
35%

These are approximate starting points.
*Set unload meter roll high speed setting to 999. If unload equipment cannot adequately keep up, lower the speed setting
and add time to the unload timer setting to completely unload the batch. In full heat mode, the time added to the unload
timer will need to be substracted from the dry timer. For additional cooling, set #1 fan switch on manual. If you need more
time between dumps use batch mode.

New unload time calculation = present unload time " new dial setting

11 pts.
12 pts.
13 pts.
14 pts.
15 pts.
16 pts.
17 pts.
18 pts.
19 pts.
20 pts.

58 min.
62 min.

66.5 min.

71.5 min.
76 min.
81 min.
86 min.
91 min.
96 min.

100 min.

Example

13.75 = 11 ÷ 800

16 min.

17.5 min.

18.5 min.

20.5 min.
22 min.

23.5 min.

25.5 min.
27 min.

28.5 min.
30 min.

1000

0
0
0
0
0
0
0
0
0
0

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

1000

65 min.
70 min.
75 min.
80 min.
85 min.
90 min.

95 min.
100 min.
105 min.
110 min.

7.5 min.
9 min.

10.5 min.

12.5 min.
14 min.

15.5 min.

17.5 min.
19 min.

20.5 min.

22.5 min.

18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.
18 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

3.5 min.

24

1300 SERIES SERVICE GUIDE

25

SERVICE

SEASONAL INSPECTION AND SERVICE

The dryer is made of weather resis­tant material, and is designed to re­quire a minimum of service. How­ever, each season we recommend
the following items be checked be­fore the unit is used, and any dam­aged or questionable parts replaced.
These checks will help eliminate
possible failures, and assure de­pendable operation of the equip­ment.

1. Shut off electrical power. Open
power box and control box, and in­spect for moisture, rodent damage
or accumulated foreign material.
Remove any foreign material
present. Inspect and tighten any
loose terminal connections. Re­place any damaged or deteriorated
wiring.

2. Check each propellor for freedom
of rotation and uniform tip clear­ance. They should also be in­spected for dirt and grain dust, es­pecially inside the hub. Any addi-

tional weight can seriously effect
the balance, and result in harmful
vibrations and a short bearing life.

3. Check each propellor for free play.
Any side play is an indication of
defective motor bearings, which
should be replaced to prevent a
complete motor failure. Make
sure motor mount bolts are tight.

4. Motor bearings should be lubricated
periodically, depending on operat­ing conditions. Under normal usage
it is desirable to have the motor
cleaned, checked and bearings re­packed by an authorized service
station every two to three seasons.
If the unit is operated continu­ously through most of the year,
this service should be performed
each year.
Note: If on site bearing

relubrication is to be performed, see
lubrication instructions for ball bear­ing motors. To keep motor bearings
properly lubricated, and dispel any

accumulation of moisture within the
windings, the fan and auger motors
should be operated for 15 to 30 min­utes each month.

LUBE PROCEDURES

If the motors are equipped with an
alemite fitting, clean the tip of the fit­ting and grease with a grease gun.
Use 1 or 2 full strokes on motors in
NEMA 215 frame and smaller. Use
2 to 3 strokes on NEMA 254 through
NEMA 365 frame. Use 3 to 4 strokes
on NEMA 404 frames and larger. On
motors having drain plugs, remove
drain plug and operate motor for 20
minutes before replacing drain plug.
On motors equipped with slotted
head grease screw, remove screw
and apply grease tube to hole. In­sert 2 to 3 inch length of grease
string into each hole on motors in
NEMA frame and smaller. Insert 3
to 5 inch length on larger motors. On
motors having grease drain plugs,
remove plug and operate motor for 20
minutes before replacing drain plug.

LUBRICATION INSTRUCTIONS FOR BALL BEARING MOTORS

SUGGESTED LUBRICATION INTERVALS*

Hours of Service per Year

5000

Continuous Normal Applications

Seasonal Service (motor is idle for 6

months or more)

Continuous high ambient tempera­tures, dirty or moist locations, high

vibrations or when shaft end gets hot

* The bearings have been lubricated at the factory, thus no lubrication should be added before start up.
26

H. P. Range

1/8 to 7 1/2

10 to 40

50 to 150

1/8 to 7 1/2

10 to 40

50 to 150

All

1/8 to 40

50 to 150

Suggested Lube Interval

5 years
3 years

1 year
1 year

3 years

9 months

1 year-beginning of season

6 months
3 months

SERVICE

SUGGESTED LUBRICANTS

Insulation Class

A & B
A & B
F & H

Consistency

Medium
Medium
Medium

Note: All of the auger and me­tering roll bearings are lifetime lu­bricated and do not require service
relubrication.

1. Remove and clean the gas line

strainers. Make certain gas valves

are closed and that gas is purged

from the system before attempting

disassembly.

2. Inspect the collector plate at the

top of the burner casting and

the burner cup for any accumu-

lation of foreign material. Clean

if required. Foreign material in

the burner cup or casting will not

burn out and will impair burner

operation.

3. If required, inspect ignitor plug and

clean the electrodes. Use an igni-

tion point file to remove carbon and

rust between the electrode sur-

faces. Ignitor gap should be about

1/8 inch.

Type

Polyurea
Polyurea
Polyurea

4. Inspect flame sensors for pos­sible damage or poor connec­tions. Flame sensor wires must
be in good condition.

5. Inspect and manually rotate the top
auger paddle assembly. The paddle
unit must rotate freely without any
indication of sticking or binding.

6. Inspect the top auger and bottom
auger drive lines for proper adjust­ment and condition. Readjust line
tension as required.
Note: All of the auger and me-

tering roll bearings are lifetime lu­bricated and do not require service
relubrication.

7. Operate dryer clean out levers,
and check cleanout hatch mecha­nism for proper operation. With
hatch open, inspect and remove
anyaccumulation of dirt, fines
and foreign material from the
bottom auger trough area.

Grease

Shell Dolium R
Shell Dolium R
Shell Dolium R

Frame Type

215T & Smaller

254 & Larger

Note: Do not allow high mois­ture material to collect within the
trough area. It may adversely affect
metal parts.

8. Inspect entire dryer for loose, worn

or damaged parts. Include check of

auger flighting, metering rolls and

other internal parts. Check that tem-

perature sensors within air ple-

num chamber are secured within

insulated clamps, and do not

chafe on other metal parts.

9. Make sure all dryer guards and

warning decals are securely in-

stalled. Make certain guards do not

interfere with moving parts. If guards

or warning decals are missing, con-

tact your dealer for a free replace-

ment.

10. Test fire the dryer several weeks

ahead of the drying season. Check

for possible gas leaks. See page

16 for burner test fire.

All

Bottom Auger Drive

27

SERVICE

FAN PROPELLOR REMOVAL AND INSTALLATION

The fan propellor is secured to the
motor shaft by the use of a taper­lock bushing, motor shaft key and
three cap screws.

CAUTION: Although the taper-lock
method of retaining the propellor
onto the motor shaft is simple, it is
essential that the following points be
read carefully and fully understood.
Improper installation can cause a
loose flying propellor, and result in
serious injury or death.

THREADED BUSHING

HOLES

The threaded holes within the bush­ing are provided for disassembly
purposes only. Do not attempt to use
these holes for reassembly. They
will not allow the parts to lock onto
the shaft thereby causing a hazard­ous operating condition.

CLEARANCE HOLES

When reassembling parts, the cap
screws must be installed through the
untapped clearance holes as shown.
This will cause the propellor to be
pulled forward onto the tapered
bushing, thus locking the parts se­curely onto the motor shaft.

When fan servicing requires re­moval and installation of the
propellor, make sure the propellor
is removed and reinstalled properly.

Key

2. Remove the three cap screws
from the clearance holes in the
taper-lock bushing.

3. Install two grade 5 cap screws
intothe threaded holes in bush­ing, and turn them by hand until
they bottom against the front
surface of the propellor.

4. Block propellor to prevent it from
turning, and gradually turn the cap
screws (up to 1/4 turn at a time) until
the propellor breaks loose from the
bushing and motor shaft. Carefully

Capscrews installed
through threaded
holes of bushing

Fan Hub

Split Taper Bushing

Fan blade

installation

remove bushing and propellor. With
the propellor free from the bushing,
a wheel can be used to pull the
bushing off of the motor shaft. Re­attach bushing onto propellor to pre­vent the loss of parts.

Note: During manufacture the
propellor and bushing are balanced
together and are marked with two
small dots to identify their original
alignment position. Check the bush­ing and propellor to make sure they
have alignment marks. Mark the
alignment of the propellor and bush­ing, if necessary.

Capscrews installed
through threaded
holes of bushing

Fan Hub

1. Lock out the fan power supply,
and remove the fan guard and
the venturi, as required on some
models.

28

Split Taper Bushing

Fan blade

removal

SERVICE

FAN MOTOR REMOVAL AND INSTALLATION

In the event of motor failure, remove
the motor as described, and take it
to the nearest service station. An
authorized service station is the only
place that can provide possible mo­tor warranty. Motor service and re­pair at other places will be at own­ers expense.

If the service station determines
motor failure is caused by faulty ma­terial or workmanship within the
warranty period, repair will be cov­ered under the warranty. Motor fail­ure caused by external sources will
result in a charge to the owner for
repair.

1. Make certain power is shut off

and locked out. Remove fan

guard and propellor.

2. Remove cover from fan/heater con-

trol box, and disconnect the motor
lead wires from within the box.
Note: Tag or otherwise identify

wires for ease of reassembly.

3. Remove motor mount bolts. If
there are shims between the
motor and its base, note their
location so they can be properly
installed during reassembly.

4. Disconnect the upper end of the
motor conduit, then carefully pull the
wires through the hole in the fan/
heater housing. Remove motor
from the fan/heater unit with the
conduit still attached. If motor re­quires service, take it to an autho­rized service station.

5. To reinstall motor, slide onto mo­tor base plate and replace shims,

if required, between motor base
and plate. Reinstall motor mount
bolts and washer, but do not fully
tighten at this time.

6. Reinstall conduit and wires through
hole in fan/heater housing and care­fully connect all electrical wiring.

7. Adjust position of motor by tempo­rarily mounting fan blade on motor
shaft. Rotate fan blade by hand,
making the necessary adjustments,
so the tip clearance between
blade and housing is uniform. If re­quired, remove the fan blade and
fully tighten all four motor mount
bolts.
Note: Make sure to install and

tighten the propellor in accordance
with previous instructions.

The position of the fan motor provides easy access for service.

29

SERVICE

HEATER PARTS REMOVAL AND INSTALLATION

Most of the heater parts can be re­moved by simply identifying any at­tached wiring, and then disconnect­ing the obvious mounting parts.

1. Flame sensor: Disconnect the
wire connector, and unscrew the
flame sensor out of its mount­ing bracket.

2. Gas Solenoid valve coil(s):
Unsnap either the plastic cap,
or the metal clip on the gas valve,
and slide the housing and coil
off the valve stem and body. Do
not energize the coil when it is
removed, as the coil may be
come damaged due to exces­sive current flow.

b. Disconnect gas solenoid valve
coils. Be sure to mark which one
goes where.

c. Lift pipe (with orifice, solenoid
valve and other parts attached),
straight up and remove from fan/
heater housing. Orifice and other
parts can now be removed from
pipe train, if desired.

5. Reassemble: To reassemble
parts, reverse the disassembly pro­cedure and check the following:

a. Make sure all parts are thoroughly
cleaned and open.

b. Use a dependable brand of
high temperature pipe caulking
compound when assembling gas
connections. Apply only a light
coating onto male threaded end
of fittings.

c. Solenoid valves and gas regula­tors are directional and must be
properly installed. Do not attempt
to connect gas solenoid valve by
applying force to the valve core
stem as it may ruin the unit.

d. Make sure all electrical wires are
properly connected. Refer to wiring
diagrams.

3. Regulator and gas solenoid
valve(s): The gas regulator and so­lenoid valve(s) are directional and
must be connected as indicated by
the markings near the port open­ings. Make sure gas is shut off and
purged from the system before re­moving parts.
Note: When installing a liquid

gas solenoid valve on LP models,
do not over tighten the connection
into the inlet side, as the inlet orifice
may become partially blocked.

4. Main Gas Orifice: With fuel shut
off and gas purged from system,
proceed as follows:

a. Disconnect the plumbing sup­portbrackets from the pipe train.

30

1

3

2

3

This view of the dryer heater shows 1-high pressure gas solenoid, 2-low

pressure gas solenoid, 3-gas solenoid valves, 4-gas regulator and 5-

vaporizer adjustment bracket

5

4

The speed reducer gear box.

This dryer is equipped with SCR
metering roll drive assembly. The
metering rolls are driven by a
separate DC type electric motor.
The speed of the motor is vari­able, and is controlled by an
electric SCR (silicon controlled
rectifier) control within the main
control box.

MAIN CONTROLS

1. SCR speed control: The meter-
ing roll speed pots on the front
of the control box regulate the
speed of the DC motor which
drives the metering rolls.

The markings on the scale from
0 to 999 represent the flow of
grain past the metering rolls as
a percent of the maximum grain

SERVICE

METERING ROLL SERVICING

discharge rate for the dryer. The
maximum setting of 999 provides
a maximum 100% discharge of
1960 BPH for 1314, 2520 BPH for
1318, 3080 BPH for 1322 model
dryers.

Note: When the control is set
to the maximum discharge rate
(999), the metering roll speed
should be 17.5 RPM for 8" dis­charge auger.

2. DC electric motor: The direct

current (DC) motor provides

the drive for the metering roll,

and is located on the front left

hand side of standard model

dryers. The output shaft of the

motor is connected directly to

the gear box assembly.The DC

motor requires no operational

adjustment as it is completely
controlled from the control box.

3. Speed reducer gear box: The
direct drive gear box provides
the required speed reduction,
and transmits power to the me­tering rolls through a drive chain
arrangement. The gear box does
not require adjustment. The drive
chain should also be periodically
lubricated and retensioned as
necessary.

4. Unload auger time delay: The
delay controls the bottom auger
system and causes the unload
auger (and any connected aux­iliary unloading conveyors) to
continue operating for the pro­grammed amount of time, even
after the metering rolls stop.
This feature permits the cleanout
of grain within the unloading
equipment at the end of all dis­charge cycles.

5. If a foreign object becomes lodged
in the metering rolls and jams
the system, the unloading auger
will stay in motion. However,
the metering roll drive will stop
and the DC motor should stall
out. The Electronic Monitoring
Control System will shut down
the dryer after a two minute
period. If any one metering roll
or sensor should malfunction
the control will display a left or
right metering roll failure warn­ing.

31

HOW TO DETERMINE A METERING ROLL PROBLEM

To determine if the metering prob­lem is from blockage, perform the
following test with the power off.

Remove the drive chain by loos­ening the motor mounting bolts.
Refer to photo, and place a pipe
wrench on the hub of the roller chain
sprocket, on the left hand metering
roll at the drive end of the dryer.
Apply up to 100 ft. lbs. of force, and
attempt to rotate the roll toward the
inside of the dryer. If the metering
roll will turn, then repeat for right
hand side. If the metering roll will
turn, it can be assumed that no
blockage exists, and the problem is
from some other cause. Check for a
break in the power train, chain, drive
key, pin, etc.

CAUTION: Keep hands away from
sprocket teeth to avoid injury
from chain backlash, as a result
of torsion build up in the system
caused by the jam.

SERVICE

The metering roll drive.

HOW TO CLEAR A JAMMED METERING ROLL

Place a pipe wrench on the hub of
the sprocket of the jammed meter­ing roll and turn the roll. First, back­ward, and then, forward several times
in an attempt to dislodge the object,
and clear it through the roll. If this is
not successful, have an assistant
turn the metering roll, and attempt to
locate the jam by sound. Shut down
the fan/heater, and eliminate any other

noise when making this check. Once
the location is determined, the roll can
be reached from the outside by open­ing the access door to remove the for­eign object causing the jam (before
opening doors see below). The ser­vice tool must be inserted before open­ing doors. First, swing open the ple­num bottom closure panel. Insert the
service tool above the metering roll.

The auger discharge switch.

32

SERVICE TOOL

This column cutoff damper is designed to insert through the grain column
(from the inside of the dryer) immediately above the metering roll. This
permits opening of the metering roll access door. For service or inspec­tion without unloading the dryer, the plenum bottom closure panel and
metering roll adjust damper must be removed prior to using service tool.

1300 SERIES WIRING DIAGRAMS

33

1300 SERIES WIRING DIAGRAMS

INPUT/OUTPUT BOARD TERMINAL IDENTIFICATION

34

1300 SERIES WIRING DIAGRAMS

1300 SERIES WIRING TO CONTROL BOX

35

1300 SERIES WIRING DIAGRAMS

1300 SERIES CONTROL WIRING

36

1300 SERIES WIRING DIAGRAMS

1300 SERIES SAFETY WIRING DIAGRAM

37

1300 SERIES WIRING DIAGRAMS

1300 SERIES FRONT PANEL INTERNAL WIRING

38

1300 SERIES WIRING DIAGRAMS

1300 SERIES FRONT PANEL EXTERNAL WIRING

39

1300 SERIES WIRING DIAGRAMS

DRYER FAN CAN CONTROL WIRING

40

1300 SERIES WIRING DIAGRAMS

1300 SERIES 220 VOLT SINGLE PHASE CONTROL WIRING

41

1300 SERIES WIRING DIAGRAMS

1300 SERIES 220 VOLT 3 PHASE POWER WIRING

42

1300 SERIES WIRING DIAGRAMS

1300 SERIES 440 VOLT 3 PHASE POWER WIRING

43

TROUBLE ANALYSIS PROCEDURE

A multimeter is required for some of
the following checkout procedures.
Before performing any tests, check
if the dryer power supply is 1 phase,
230 volt, or 3 phase, 230 or 460 volt.

• The burner circuit is 120 volts AC

on all standard U. S. production
models.

• The control circuit to the motor

starters is 120 AC volts.

Problem

Control power switch light off.

• The safety circuit is 12 volts DC

• When checking these circuits,
measure voltage between the cir
cuit test location and to ground.

• DC circuits should be measured
between the test location and its
respective DC ground.

Refer to wiring diagrams and the
parts list for identification of parts
and the electrical terminals.

1. Check that main power and circuit breakers are
turned on. Check for tripped breaker.

2. Check for blown 5 amp fuses.

3. Monitor relay is defective.

4. Defective transformer or wiring.

5. Check for a defective power switch.

6. Check wiring between fuses and input/output board.
Refer to wiring diagram for test locations.

CAUTION: When making high volt­age tests with "live" circuits, be ex­tremely careful. Follow established
safety practices. Turn power on for
testing only. Do not attempt to make
the dryer operate by using a jumper
wire to bypass a defective safety
component.

Possible Cause

Control power light is on, reset button has been pressed,

drying mode light off.

This indicates control power is present at input/output

board, but no power is being transferred through the I/O

board.

No display on LCD screen.

Control power light is on, drying mode light is on--load

auger, fan, heater, unload auger will not operate.

Display shows "L1 VOLTAGE LOST" message.

Display shows "12 VOLT POWER SUPPLY WARNING"

message.

1. Power interruption: Incoming power to the dryer has
been interrupted. The display screen will show the date
and time if this has occured, once power has returned.

2. Display not finished initial setup: The monitor will
display a copyright message and model number, total
running time in hours and minutes and then the current
date and time. To activate the controller press the reset
button.

3. Input/output board: The input/output board has devel­oped a problem that requires its replacement.

1. Check for a defective power switch.

2. Check wiring between fuses and input/output board.

3. Check for 120 volts AC between points J9-3 and AC-1.

4. The display may have a malfunction requiring its replacement.

1. Press the dryer power start button.

2. Refer to the problem listed for load auger, fan heater and
unload auger in the following sections.

The left circuit breaker located on the input/output board of the
Electronic Monitoring Control System has tripped, or one of the
hardware timers on the Electronic Monitoring Control System has
shut down the dryer.

The right circuit breaker located on the input/output board of the
Electronic Monitoring Control System has tripped.

Display shows "MOTOR OVERLOAD" message.

44

The thermal overload on the fan motor, load motor, unload
motor or an auxiliary motor has opened indicating an
overloaded motor. (The overloads must be manually reset).

TROUBLE ANALYSIS PROCEDURE

Problem

Display shows "BURNER 1, 2 OR 3 VAPOR HIGH

TEMPERATURE" message.*

Display shows "BURNER 1, 2 OR 3 WARNING FLAME

NOT DETECTED" message.*

Display shows "FAN 1, 2 OR 3 HOUSING HIGH

TEMPERATURE" message.*

Display shows "GRAIN DISCHARGE WARNING" message.

Display shows "LOWER ADJ. GRAIN HIGH

TEMPERATURE" message.

Display shows "LOWER FIXED GRAIN HIGH

TEMPERATURE" message.

Possible Cause

The LP gas vapor temperature sensor located in the gas
train downstream from the vaporizor has opened, indicating
that the vaporizer is running too hot and must be read­justed. (This control is a 200°F limit which automatically
resets when it cools).

The flame sensor has failed to detect a burner flame,
indicating that the burner has failed to light, there is a
problem with the flame sensing circuitry or the dryer is not
getting burner fuel.

The temperature high limit located on the fan/burner
housing has opened, indicating an over temperature
condition has occurred towards the rear of the fan/heater
housing. (This control is a 200°F limit control that must be
manually reset).

The cover on the grain discharge box has opened, indicat­ing that grain is backing up into the discharge box.

An over temperature condition has occurred inside the left
side grain column. (This control is a 210°F limit which
automatically resets when it cools).

An over temperature condition has occurred inside the right
side grain column. (This control is a 210°F limit which
automatically resets when it cools).

Display shows "OUT OF GRAIN" message.

Display shows "OUT OF GRAIN-UNLOAD CLEANOUT.."

message.

Display shows "PLENUM 1, 2 OR 3 HIGH TEMPERATURE"

message.*

Display shows "METER ROLL DRIVE SYSTEM FAILURE"

message.

Display shows "RIGHT METERING ROLL FAILURE"

message.

Display shows "LEFT METERING ROLL FAILURE"

message.

Display shows "AUXILIARY SAFETY SHUTDOWN"

message.

Display shows "BURNER 1, 2 OR 3 SHUTDOWN LOSS OF

AIRFLOW" message.*

The dryer has run low on grain, and the out of grain timer
has timed out shutting the dryer down. The unload auger
will then clean out the dryer, if the unload switch is on
during continuous flow operation. Check the out of grain
timer setting, and if necessary adjust. Also, before restart­ing, inspect load equipment for possible damage or
adjustment.

An over temperature condition has occurred inside the
dryer plenum. (This control is a 300°F limit which automati­cally resets when it cools).

The metering roll drive system has failed to turn within two
minutes. A faulty D. C. motor, broken chain or jammed roll
is a possible cause of this message.

The right metering roll has stopped rotating, or the sensor
has been damaged.

The left metering roll has stopped rotating, or the sensor
has been damaged.

A shutdown has occurred due to a user installed safety
feature. This circuit is located between J5-8 and J1-20
terminals on the input/output board.

The air switch contacts have opened, indicating insufficient
airflow for burner to operate.

* The number in the warning message designates the fan, burner or plenum where the problem is located. All areas are

numbered from the bottom up. For example, the bottom fan is number 1, and the top fan is number 3.

45

TROUBLE ANALYSIS PROCEDURE

Problem

Display shows "FAN 1, 2 OR 3 FAILURE-NO AIRFLOW"

message.*

Display shows "FAN 1, 2 OR 3 CANNOT START-CHECK

AIR SWITCH" message.*

Fan motor will not start.

Top auger will not start.

Possible Cause

The air switch contacts have opened, indicating the fan
may not be turning. The air switch may need adjustment.

The air switch contacts have closed prior to the fan
starting, indicating a freewheeling blade or improper setting
of air switch.

1. Check that the fan circuit breaker and the fan switch are
on. Also, check for defective switch or bad wiring connections.

2. If lighted switch does not light, the air switch needs
adjustment, or the bulb may be burned out.

3. Verify closing of fan motor contactor. Check voltage on
load side of contactor. See appropriate power wiring
circuit diagram for terminal numbers. Inspect contactor
for defective points or a burned out coil.

4. Inspect connections, and check voltage applied to the
motor leads in the fan heater box to determine if the
motor is defective.

5. Check capacitors on single phase motors, and replace if
defective. If motor starts slowly, check for low voltage
during starting due to excessive voltage drop in power
supply wiring.

1. Check that the top auger circuit breaker and the load
auger switch are turned on.

2. If lighted switch does not light, the output power to the
contactor is missing. Check connections, or if the bulb is
burned out.

3. Check position of the upper auger paddle switch. It
must be down to start auger.

4. Inspect for secure mounting and wiring of mercury
switch in the terminal box on the top auger paddle
switch shaft. Include check for a defective mercury switch.

5. Verify closing of the top auger contactor. Check voltage on
load side of contactor. Inspect contactor for defective
points, or a burned out coil.

6. Inspect connections, and check voltage applied to motor
leads in motor junction box to determine if motor is defective.

7. Check that the mercury switch box is in the proper position.

Bottom auger will not start.

Grain not moving through columns.

* The number in the warning message designates the fan, burner or plenum where the problem is located. All areas are

numbered from the bottom up. For example, the bottom fan is number 1, and the top fan is number 3.

46

1. Check that the bottom auger circuit breaker is on.

2. If the lighted switch does not light, the output power to
the contractor is missing. Check connections, and
check to see if the bulb is burned out.

3. Check that the unload switch is on (1 or 2 speed).

4. Verify closing of bottom auger contactor; check voltage
on load side of contactor.

5. If using the moisture control, check for proper setting, or
defective operation of the control.

6. Check for any loose wire connections in unload auger
and moisture control thermostat circuits.

1. Check the dryer for fine material buildup inside the
columns.

2. Avoid leaving the dryer columns full for long periods at a
time (2-3 days) while not operating the dryer, or during
rainy weather.

TROUBLE ANALYSIS PROCEDURE

Problem

Grain not moving through columns.

Uneven drying-Some kernels appear brown while others

are under dried.

Uneven heat exiting from dryer columns.

Burner will not fire with fan operating.

Heater switch light and gas solenoids go on and off

erratically-The light blinks on and off while the solenoids

"chatter".

Possible Cause

1. Check the dryer for fine material buildup inside the
columns.

2. Avoid leaving the dryer columns full for long periods at a
time (2-3 days) while not operating the dryer or during
rainy weather.

3. Empty the dryer. Keep the dryer clean! Do not allow
fine material to gather in the plenum chamber.

4. It may be necessary to open the strike off plates in the
affected columns in half inch intervals.

1. Check plenum thermostat temperature setting. Some
varieties of grain are more sensitive to higher operating
temperatures. It may be necessary to lower the plenum
operating temperature to accommodate this.

2. Check for proper burner alignment (side to side).
Vibration during shipment may have caused misalignment.

1. Burner switch must be on.

2. Check for power to ignition board.

1. The blinking light indicates the flame sensor is not
detecting flame.

2. The "chattering" solenoids are caused by the loss of
flame detection, and the thermostat and Fenwal ignition
board trying to reestablish a flame. Check for loose
wires on flame sensor; replace or repair wires or sensor.

Burner will not fire-No gas pressure with fan operating at
least 15 seconds (gas supply or fan heater malfunction).

Burner will not fire-But gauge shows gas pressure.

Burner maintains desired drying temperature-but cycles

from hi-fire to off (without going to lo-fire).

1. Check gas supply. Also, check gas filter and gas line for
possible obstruction or closed valves. Refill tank;
replace or repair parts, as required.

2. Inspect gas solenoid valves (including liquid valve on
LP units) for defective coils or improper wiring. Replace
valve or coil if valve will not open with proper voltage
applied (120 volts).

3. Check for proper voltage. 120 volts across L1 and L2
incoming voltage to the Fenwal Ignition Board, and 115
volts outgoing across V1 and V2 to the solenoids.

1. Fenwal Ignition Board: Check board for spark by
removing ignition wire from board, and holding aninsu­lated screwdriver against the output terminal and 1/4"
away from the control box casing. There should be a
strong spark. Check board wire connections. Replace
the Fenwal board, if necessary.

2. Ignitor: Check that the ignitor is properly gapped to 1/8"
and that it has a strong spark. Inspect the porcelain and
electrodes for damage or cracking. Replace or clean if
necessary.

1. Make sure the low flow control valve is not completely
closed. Valve must be adjusted open to provide the
proper lo-fire gas pressure listed in this manual.

2. Check lo-fire solenoid valve for proper operation.

47

TROUBLE ANALYSIS PROCEDURE

Problem

Burner operates-But will not cycle from hi-fire to lo-fire.

Burner operates-But will not cycle from lo-fire to hi-fire.

Possible Cause

1. Check the gas pressure reading on the gauge. Problem
may be due to insufficient gas regulator setting. Tempo­rarily decrease the hi-lo fire thermostat setting to verify
that the thermostat will function and cause the burner to
cycle. If burner will cycle at the reduced thermostat
setting, it indicates that the problem was due to insuffi­cient heat to satisfy the original setting. Increase the
gas regulator setting for additional heat output. Do not
exceed the maximum pressure listed in this manual.

2. Hi-lo fire thermostat control may be defective. If the
burner still will not cycle to lo-fire after decreasing the
thermostat, the problem may be due to a broken or
kinked thermostat sensor tube. Observe reading on the
thermometer. Replace control assembly if it cannot be
set to cause its switch to go to the open circuit position
with normally hot air plenum temperatures.

3. If the burner continues to operate on hi-fire, check the
hi-fire gas solenoid valve for a stuck or blocked open
condition, or for reversed gas pipe connections. The
solenoid valve must not allow gas flow when its coil is
not energized.

1. Check for an excessive lo-fire gas pressure setting.
Observe pressure setting shown on gauge, and
compare reading with recommended low pressure
settings listed in this manual. Readjust lo-fire setting on
flow control valve, if necessary.

2. Check for improperly adjusted or defective hi-lo fire
thermostat control. Temporarily increase the tempera­ture setting. If the heater will still not cycle, check for
problem in the control wire connections. The control
wires should be connected to terminals R and B of the
thermostat, so the switch will open upon temperature
rise. If the burner will cycle with these two wires
connected together, the thermostat is faulty.

3. Check for improperly connected or faulty hi-fire gas
vapor solenoid valve. Correct any poor connections or
defective wiring. If wiring appears proper, problem may
be caused by a burned out valve coil or defective valve.
Replace hi-fire solenoid valve, or its coil, if defective.

48

QUICK REFERENCE GUIDE

ELECTRONIC MONITORING CONTROL SYSTEM

Important! To activate the controller
after turning on the control power,
press the reset button.

Setting the dry, cool, unload and out
of grain timers:

• Press the dry, cool, unload or
out of grain button

• Press the modify button

• Press the increase or decrease
button to get desired setting

• Press the enter button when
desired setting is reached

Setting the load and unload delays:

• Press the load or unload button

• Press the modify button

• Press increase or decrease
button to get desired setting

• Press the enter button when
desired setting is reached

Pressing the increase and decrease
buttons simultaneously will access
the following programming features:

• Safety circuit shutdown log

• Dryer model number

• Fan delay

• BPH factor

• Metering roll monitor disabling
feature

• Air switch disabling feature

These features are accessed se­quentially as listed above. Press the
increase or decrease buttons to
change a setting. Press the enter
button to move from feature to fea­ture.

Pressing and holding the reset but­ton for five seconds will access the
following programming features:

• Calendar year setting

• Calendar month setting

• Calendar day setting

• Clock hour setting

• Clock minute setting

• Bushel counter reset

• Batch counter reset

These features are accessed sequen­tially as listed above. Press the in-
crease or decrease buttons to
change a setting. Press the enter but­ton to move from feature to feature.

Change the marquee on the LCD dis­play:

• Press and hold the modify button
while turning on the control power

• To change a character press the
increase or decrease button

• To move the cursor to the right
press the unload button

• To move the cursor to the left
press the dry button

• To delete a character press the
cool button.

• Press enter when the desired
marquee is displayed

To reset the computer to the original
default setting, turn off the computer,
press and hold the green AUX 1 but-
ton and turn on the computer.
NOVRAM will appear on the LCD dis­play. The year, date, time and min­utes may be changed now, and the
shutdown history may also be
cleared.

Note: If the history is cleared the

dryer model number must be reset
or only the bottom fan will operate.

Dryer owner and Airstream associates check the Electronic Monitoring Control System.

49

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51

I R S T R E A M

A

R A I N

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O N D I T I O N I N G

C

Y S T E M S

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52

1004 E. Illinois St., Box 20
Assumption, IL 62510-0020
phone: [phone]
fax: [phone]