GSI Outdoors PNEG-552 User Manual
100 Series Dryer
Operation and Service Manual
PNEG-552
Date: 11-02-07
PNEG-552
2 PNEG-552 100 Series Dryer
Table of Contents
Contents
Chapter 1 Safety ..................................................................................................................................................5
Safety Guidelines ............................................................................................................................... 5
Dryer Operation .................................................................................................................................. 6
Emergency Stop ................................................................................................................................. 6
Safety Precautions ............................................................................................................................. 7
Chapter 2 Safety Alert Decals ............................................................................................................................8
Chapter 3 Dryer Control Panel .........................................................................................................................12
Dryer Control Panel Featuring the 100 Series Control System ........................................................ 13
Special Features .............................................................................................................................. 18
Safety Circuit Shut Down Messages ................................................................................................ 18
Chapter 4 Error Conditions ..............................................................................................................................20
Chapter 5 Dryer Pre-Start Checks ...................................................................................................................22
Inspect the Metering Rolls ................................................................................................................ 22
Set Control Switches ........................................................................................................................ 22
Electrical Power ............... .... .......................................................... ... ... ... .... ... ................................... 23
Control Power Switch ....................................................................................................................... 23
Power Start Button ........................................................................................................................... 23
Fuel Check ....................................................................................................................................... 23
Load Auger ................................................ ... .... ... ... .......................................................................... 23
1 Speed Operation ........................... ... .......................................................... ... ... .... ... ...................... 23
Metering Roll Operation ................................................................................................................... 24
Fan Switch ........................................................................................................................................ 24
Burner Safety ................................................................................................................................... 25
Heater Test Fire ............................................................................................................................... 25
Staged Batch Check ......................................................................................................................... 25
Dryer Shut Down .............................................................................................................................. 26
Stopping Dryer Operation ................. ... ... ... ... .... ... ... ... .... ... ... ............................................................. 26
Emergency Stop ............................................................................................................................... 26
Chapter 6 Dryer Start-Up ..................................................................................................................................27
Continuous Flow Operation ....................................... .... ... ... ... .... ... ... ... ............................................. 27
Full Start-Up Check .......................................................................................................................... 27
Filling the Dryer ................................................................................................................................ 27
Staged Batch Operation ................................................................................................................... 28
Starting the Dryer ............................................................................................................................. 30
Adjusting the Temperature ............................................................................................................... 31
Full Heat Continuous Flow Operation .............................................................................................. 32
Adjusting the Moisture Control ......................................................................................................... 33
Chapter 7 Service ..............................................................................................................................................34
Seasonal Inspection and Service ..................................................................................................... 34
Suggested Lubricants....................................................................................................................... 35
Lubrication Procedures ............................................. .... ... ... ... .... ... ... ... ... .... ...................................... 35
Additional Checks ................... .......................................................... ... ... .... ... ... ................................ 35
Fan Propeller Removal and Installation ........................................... ... ............................................. 37
Threaded Bushing Holes ............................................................................................................... ... 37
Clearance Holes ............................................................................................................................... 37
Fan Motor Removal and Installation .......................... ....................... ....................... ......................... 38
Heater Parts Removal and Installation ................ ....................................................... ..................
Metering Roll Servicing .................................................................................................................... 41
How to Determine a Metering Roll Problem ..................................................................................... 42
How to Clear a Jammed Metering Roll .......................................... ...................... ....................... ...... 43
.... 40
PNEG-552 100 Series Dryer 3
Table of Contents
Chapter 8 Wiring Diagrams ..............................................................................................................................44
100 Series Single Fan Wiring to Control Box ................................................................................... 44
100 Series Front Panel External Wiring ........................................................................................... 45
100 Series Front Panel Internal Wiring ............................................................................................. 46
100 Series Lower Back Panel Wiring ... ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... ............... 47
100 Series External Wiring to Dryer ................................................................................................. 48
100 Series Upper Control Box Wiring .......................... ...... ....... ...... ...... ....... ...... .... ...... ...... ....... ........ 49
100 Series Main Power Wiring ......................................................................................................... 50
Chapter 9 Schematic Diagram .........................................................................................................................51
100 Series Control Schematic .......................................................................................................... 51
100 Series 220 Volt 1 Phase Power Schematic .............................................................................. 54
100 Series 220VAC 3 Phase Power Schematic ............................................................................... 55
100 Series 440VAC 3 Phase Power Schematic ............................................................................... 56
Chapter 10 Troubleshooting ............................................................................................................................57
Chapter 11 FAQs ...............................................................................................................................................61
Chapter 12 Warranty .........................................................................................................................................63
4 PNEG-552 100 Series Dryer
1. Safety
Safety Guidelines
This manual contains information that is important for you, the owner/operator, to know and understand.
This information relates to protecting personal safety and preventing equipment problems. It is the
responsibility of the owner/operator to inform anyone operating or working in the area of this equipment
of these safety guidelines. To help you recognize this information, we use the symbols that are defined
below. Please read the manual and pay attention to these sections. Failure to read this manual and its
safety instructions is a misuse of the equipment and may lead to serious injury or death.
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may result
in property damage.
NOTE indicates information about the equipment that you should
pay special attention.
WARNING! BE ALERT!
Personnel operating or working around electric fans should read this manual. This
manual must be delivered with the equipment to its owner. Failure to read this manual
and its safety instructions is a misuse of the equipment.
PNEG-552 100 Series Dryer 5
1. Safety
Dryer Operation
Thank you for choosing a GSI product. It is designed to give excellent performance and service for
many years.
This manual describes the operation and service for all standard 100 Series single fan grain dryers.
These models are available for liquid propane or natural gas fuel supply, with either single phase
230 volt, or three phase 220 or 440 volt electrical power.
Our foremost concern is your safety and the safety of others associated with this equipment. We want
to keep you as a customer. This manual is to help you understand safe operating procedures 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 requ irements, hazards and p recautions
exist, and to inform all personnel associated with the equipment or in the area . Safety precautions may
be required from the personnel. Avoid any alterations to the equipment. Such alterations may produce
a very dangerous situation where SERIOUS INJURY or DEATH may occur.
This equipment shall be installed in accordance with the current installation codes and applicable
regulations which should be carefully followed in all cases. Authorities having jurisdiction should be
consulted before installations are made.
Emergency Stop
The emergency stop switch is located on the upper control box on the door. Pushing the emergency st op
switch will interrupt the control power and stop all dryer functions.
Pushing the emergency stop switch does not interrupt the main power to the
upper control box panel.
6 PNEG-552 100 Series Dryer
1. Safety
Safety Precautions
READ THESE INSTRUCTIONS BEFORE OPERATION AND SERVICE
SAVE FOR FUTURE REFERENCE
1. Read and understand the operating manual before attempting 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 the power to be ON.
4. Check for gas leaks at all gas pipe connections. If any leaks are de tected, DO NOT operate dryer.
Shut down and repair before further operation.
5.
NEVER
6. Set pressure regulator to avoid excessive gas pressure applied to the burner during ignition and
when the burner is in operation. See Chart on Page 25 for operating procedures. DO NOT e xceed
maximum recommended drying temperature.
attempt to operate the dryer by jumping or otherwise bypassing any safety devices on the unit.
7. Keep the dryer clean.
is easier to dry. Fine material increases resistance to airflow and requires removal of extra moisture.
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 can START AUTOMATICALLY.
10. Keep area around air inlet to the fan clear of any obstacles and combustible materials.
11. BEFORE attempting to remove and reinstall any propeller, make sure to read the recommended
procedure listed in the Service section of the manual.
12. Make sure that capacities of auxiliary conveyors are matched to dryer auger capacities.
DO NOT
allow fine material to accumulate in the plenum chamber. Clean grain
Use Caution in the Operation of this Equipment
This dryer is designed and manufactured with operator safety in mind. However, the very nature of a
grain dryer having a gas burner, high voltage electrical equipment and high speed rotating parts,
presents hazards to personnel which can not be completely safeguarded against without interfering with
the efficient operation of the dryer and reasonable access to its 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 allow fine material 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 the O wner’s Manual
and make it a practice to regularly inspect the unit for any developing problems or unsafe conditions.
Take special note of the Safety Precautions before attempting to operate the dryer.
PNEG-552 100 Series Dryer 7
2. Safety Alert Decals
GSI Group recommends contacting the local power company and, having a representative survey the
installation so that wiring is compatible with their system, and adequate power is supplied to your unit.
Safety decals should be read and understood by all people in the grain handling area.
If a decal is damaged or is missing, contact:
GSI Decals
1004 E. Illinois St.
Assumption, IL 62510
Phone: 217-226-4421
A free replacement will be sent to you.
Decal: DC-1224
Decal DC-1224 is located in two places on the fan/heater control box.
One is located on the lid and another one is on the front of the fan
heater control box. An additional location for this decal is inside the
upper control box for the dryer.
Decal: DC-889
Decal DC-889 has two locations. One is located
inside the fan/heater control box and another one
is on the dryer upper control box door next to the
main power disconnect.
8 PNEG-552 100 Series Dryer
WARNING!
Moving parts can crush
and cut. Keep hands
clear. Do not operate
without guards in place.
Failure to do so could
result in serious injury.
DC-972
2. Safety Alert Decals
Decal: DC-972
Decal DC-972 is located on the bottom auger belt guard and the front bearing plate
(which is visible when the bottom auger belt guard is removed). An alternate
location would be at the rear of the dryer for portable dryers equipped with the
Front Discharge Option.
WARNING!
Automatically controlled
belt drive can start at
anytime. Keep hands
clear. Failure to do so
could result in serious
injury.
DC-971
Decal: DC-971
Decal DC-971 is located on the bottom auger belt guard and the front bearing
plate (which is visible when the bottom auger belt guard is removed). An
alternate location would be at the rear of the dryer for portable dryers equipped
with the Front Discharge Option.
An additional location for decal DC-971 is the top auger belt guard (one on the belt
guard cover and another one is on the inside belt guard body visible when the belt
guard cover is removed).
Decal: DC-974
Decal DC-974 has several different locations. Two are located on the front end panel
below the fan/heater. Two are located on the rear end panel below the rear access
door. Two are located on the auger discharge box (one on the outside top and one on
the inside of the flapper lid next to the discharge mercury switch). One more of these
decals is located inside the plenum on the rear plenum closure door just inside the
rear access door.
Rotating auger will crush
and cut. Auto equipment
can start at anytime. Do not
enter until electric power is
locked in off position. Failure
to do so will result in serious
injury or death.
DC-974
PNEG-552 100 Series Dryer 9
2. Safety Alert Decals
Decal: DC-1227
Decal DC-1227 is located on the
fan/heater access door.
DC-1227
Decal: DC-1225
WARNING
Stay clear of rotating
blade. Blade could start
automatically. Can cause
serious injury. Disconnect
power before servicing.
DC-1225
WARNING
Rotating metering roll.
Equipment can start
automatically. Keep hands
clear. Can cause serious
injury. Disconnect power
before servicing.
DC-1229
Decal DC-1225 is located on the
fan/heater access door.
Decal: DC-1229
Decal DC-1229 is located on each
of the meter roll access doors.
10 PNEG-552 100 Series Dryer
Automatic equipment can
start at anytime. Do not
enter until fuel is shut off
and electrical power is
locked in off position.
Failure to do so will result
in serious injury or death.
DC-973
2. Safety Alert Decals
Decal: DC-973
Decal DC-973 is located on the rear plenum access
door (inside and outside).
3/4" MINIMUM
BOLT DIAMETER
HUB TEMPERATURE
NO GREATER THAN 150°F
150°
16-17"
TIGHTEN TO
90FT-LBS.
Hitch pin must be
securely fastened and
no less than 3/4" in
diameter. Failure to
follow installation
instructions may result
in property damage.
Dryer must be
towed empty and
in accordance
Decal: DC-338
Decal DC-388 is located on the
hitch tongue.
DC-388
Decal: DC-1249
Decal DC-1249 is located on
the hitch tongue.
55-60 PSI
COLD
with state and
provincial
050
CHECK AFTER 50 MILES AND EVERY 200 MILES
100
150
200 250
PNEG-552 100 Series Dryer 11
regulations.
DC-1294
3. Dryer Control Panel
Figure 3A Grain Dryer Control Panel
12 PNEG-552 10 0 Series Dryer
3. Dryer Control Panel
Dryer Control Panel Featuring the 100 Series Control System
The control panel provides easy access to gauges and controls. The Competitor Series 2000 Control
System is a computerized control system that gives instant information regarding dryer operation.
Moisture Control
The Series 2000 Dryer has a built in moisture control. It co ntrols the moisture level o f d ischarge d g r ain
by sensing grain column temperature.
Moisture Control Switch
This switch turns the power ON or OFF to the moisture control. The light beside the switch is illuminated
when the grain column temperature is below the moisture control setpoint.
Control Power Switch
The power to the Competitor 2000 Control System is turned ON or OFF with this switch.
Outside Light
The dryer outside light is turned ON or OFF here.
Drying Mode Switch
This is used to select staged batch or continuous flow drying.
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.
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 Switch
The 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 is used in batch mode only and allows the
fan to shut down during the unloading operation if desired. The light comes ON only when air pressure
is sensed.
Heater Switch
This switch is used to turn the burner ON or OFF. The ON position will operate the burner continuously,
but only when the fan is running. The AUTO position is used in batch mode only and allows the heater
to be turned OFF to cool the grain and during the unloading operation. The b urner light comes ON only
when flame is detected.
PNEG-552 100 Series Dryer 13
3. Dryer Control Panel
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 mod e switch
is turned to continuous 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 MOISTURE CONTROL switch is ON, and the drying mod e switch
is turned to continuous 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 whenever the metering rolls are operating.
• In both the 1 Speed and the 2 Speed position, if the MOISTURE CONTROL switch is OFF, and
the drying mode switch is turned to continuous 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, the same
switch will also control the operation of the auxiliary equipment.
Low Speed Metering Roll Potentiometer
Use this to adjust the low speed of the metering roll when the 2 Speed automatic moisture control feature
of the dryer is in use.
High Speed Metering Roll Potentiometer
Use this to:
• Set the high speed of the metering roll when the 2 Speed automatic moisture control feature of
the dryer is utilized.
• Set the speed of the metering rolls when the 1 Speed automatic moisture control feature of the
dryer is utilized.
• Set the speed of the metering rolls during continuous flow operation when the moist ure 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 oth er 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.
14 PNEG-552 100 Series Dryer
3. Dryer Control Panel
Dryer Power Stop Switch
This switch stops all dryer functions. If an automatic dryer shut down occurs, first determine and correct
the cause of the shut down. Press the dryer power stop button to reset the dryer before restarting.
100 Series Control System
The 100 Series System controls all timing functions and safety circuit checks. It is designed to simplify
dryer operation by providing messages and warnings on its Liquid Crystal Display (LCD).
Turning ON the 100 Series Control System
Turn the CONTROL POWER switch to ON. The monitor will display “GSI” and the current software
version number.
Figure 3B 100 Series Dryer Control Panel
PNEG-552 100 Series Dryer 15
3. Dryer Control Panel
Setting the Dry, Cool, Unload and Out of Grain Timers
These switches are used to set the drying cycle times in the staged batch drying mode only. The drying
mode switch must be in the staged batch position. Out of grain sets the length of time the dryer will run
before shutting down when the load switch is in the AUTO position. To change the setting of these
timers, follow these instructions:
1. Press the PROGRAM (TIMERS) button until the “carrot” (See Figure 3C) is above the timer you
want to modify.
2. Use the UP and DOWN arrow keys to change from the present time to the desired setting. The new
time is automatically accepted.
3. Keep pressing the PROGRAM (TIMERS) button until the carrot disappears or press the mode
select button once to exit.
During the 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 settings by pressing and ho lding the “stop”
button for 5 seconds.
“CARROT”
Figure 3C Dryer LCD Display
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 too often. The unload delay is used to control the amount of time
the unload auger runs after the metering rolls stop to allow for auger clean-out.
1. Press the PROGRAM (DELAYS) button until the carrot is under the time delay to be changed.
2. Use the UP and DOWN arrow keys to change from the present time to the new one. T he new time
is automatically entered.
3. Keep pressing the PROGRAM (DELAYS) button until the carrot disappears or press the mode
select button once to exit.
16 PNEG-552 100 Series Dryer
3. Dryer Control Panel
Setting the Moisture Control and Plenum Setpoint
1. Press the PROGRAM (TEMPERATURES) button until the carrot is under the temperature setting
to be changed.
2. Use the UP and DOWN arrow keys to change from the present temperature to the new one. The
new time is automatically entered.
3. Keep pressing the PROGRAM (TEMPERATURES) button until the carrot disappears or press the
mode select button once to exit.
Dryer Safety Circuit
The Competitor Series 2000 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 shut down will be
shown on the LCD display. To restart the dryer after a safety shut down, first correct the reason for the
shut down, and then press the dryer power stop button to reset the circuit. Press the start button.
Figure 3D 100 Series Control System
Monitoring Grain Temperatures, Plenum Temperature or Timers
Use the mode select to decide which of the modes you want to view.
Checking the Hour Meter
Press the UP arrow key and the total hours on the machine are displayed along with the batch count
and minutes since the last shut down in five (5) successive screens. The screens appear in the following
order: Hours X 100, balance of hours, balance of minutes, batch count, and minutes since last shut
down. For example, five (5) screens displaying 5 | 23 | 12 | 144 | 188 would be: 523 Hours, 12 minutes
on the Hour Meter, Batch Count at 144 and 188 minutes since the last shut down.
PNEG-552 100 Series Dryer 17
3. Dryer Control Panel
Special Features
Dual Batch Drying Temperature Mode
To greatly improve quality in b atch mode, redu ce the plenum temperatu re at the end of the
drying cycle. This will reduce peak temperature that the grain on the inside of the column
attains and thereby reduce over-drying.
Enter dual batch drying temperature mode by switching ON dip switch number four (4), the
fourth switch from the bottom, on the dip switches located inside the control box on the
back of the computer control board. This enables two plenum and two grain temperature
settings, high and low. Set these parameters the same way the single plenum and grain
temperature settings are made. The first of each temperatures being set will be the low
setting and will be indicated by the word “Low” on the screen. The second setting will be
identified by “High” on the display screen.
Typically, the plenum settings would be 170 for low and 230 for high and the low grain
temperature setting would be 10° to 20° below the normal moisture control temperature
setting which becomes the new high setting.
Both capacity and quality will improve using this feature while operating in batch dry and
cool or all heat modes.
Emergency Cooling Mode
To enter an emergency cooling mode, switch ON switch number seven (#7), which is the
second switch from the top on the dip switch inside of the control box on the back of the
computer control board. This initiates a mode in which only the drye r fan runs, in case there
is a plenum temperature or grain high-limit warning. When either of these safeties shuts
down the dryer, run the fan to help cool the grain and/or plenum high-limit back down to a
safe level. After flipping the switch, press the Start button and only the fan will run for
approximately five minutes.
Burner ON/OFF Operation
Due to changing fuel conditions and to aid in drying wheat and other low temperature grains in hot
weather, an ON/OFF burner has been developed in recent years.
By moving the third switch, number six (#6), on the dip switch located inside the control box on the back
of the computer control board to ON, the burner can be changed from a high-low burner to an ON/OFF
burner. The burner will operate exactly the same as the high-low burner, howe ver, when the setpoint is
reached, the burner cycles OFF instead of switching to a lower pressure. The vap orizer cools much more
quickly and allows a closer tolerance on the setpoint and to operate at lower temperature rises.
Safety Circuit Shut Down Messages
Vapor High Temperature
This shut down message indicates that the LP gas vapor temperature sensor, located in the gas pipe
train downstream from the vaporizer has opened. This indicates that the vaporizer is running too hot and
must be readjusted. This sensor is set at 200°F and automatically resets itself when cool.
18 PNEG-552 100 Series Dryer
3. Dryer Control Panel
Loss of Flame
The flame sensor 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 burner switch light
will be lit any time flame has been sensed by the burner controls.
Housing High Temperature
The temperature high-limit, located on the fan/heater housing has opened, indicating an over
temperature condition has occurred toward the rear of the fan/heater housing in an oblong covered
electrical box. This control is set at 200°F and MUST BE MANUALLY RESET.
Rear 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.
Motor Overload
One of the thermal overloads on either the fan, load, unload or auxiliary motors has opened, indicating
an over current condition. The overloads MUST BE MANUALLY RESET.
Grain High Temperature
An over temperature condition has occurred in one of the grain columns, causing the control to shut
down the dryer. This control is set at 210°F and automatically resets itself when cool.
Out of Grain
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.
Plenum 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. See Emergency Cooling Mode on Page 18.
No Airflow
The contacts in the air switch have opened due to insufficient airflow for the burner to operate. The
contacts in the air switch have opened due to the fan not turning, or the air switch may need adjusting.
Air
The air switch contacts have closed prior to the fan starting, indicating a free wheeling blade or improper
setting of the air switch.
Grain and Plenum High Temperature (Both at Same Time)
If both of these warnings appear on the screen at the same time, one of the two mech anical high-limits,
located in each of the two grain columns, has been tripped due to heat exceeding their 200° setpoint or
one or both have failed. They will automatically reset when the temperature returns below 200°.
NOTE: The emergency cooling feature will not function if either or both of these mechanical sensors
are tripped.
PNEG-552 100 Series Dryer 19
4. Error Conditions
Figure 4A
20 PNEG-552 100 Series Dryer
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