Farm Fans C-2125A User manual

,
-2125A, C-2130 ,& C-2140A
GRAIN DRYERS
fAR
fANS
Division of ffi CORPORATION
5900 ELMWOOD AVE .• INDIANAPOLIS, IN 46203
© 1992 ffi CORPORATION Printed in U.S.A.
C21A-01-2
Revised 8-92

READ THESE INSTRUCTIONS BEFORE INSTALLATION AND OPERATION.
SAVE FOR FUTURE REFERENCE.
Thank you for choosing a Farm Fans C-2100A Series grain dryer. These units are among the finest grain
dryers ever built; designed to give you excellent operating performance and reliable service for many
years.
This manual describes the installation and operation for all 1991 and later standard production type
C-2100A Series dryers. These dryers are available for liquid propane or natural
gas fuel supply, with
either 230V or 460V three phase (60Hz) electrical power (single phase 230V available for the C-2125A).
Operating information for the optional Heat Reclaimer equipment available for some models,
is contained
within a separate publication.
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 cannot 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.
Continued safe dependable operation of automatic eqUipment depends, to a great degree, upon the
owner and operator(s}. For a safe and dependable drying system, follow recommendations within the
manual and established safety practices. Also, make it a practice to regularly inspect the operation of the
unit for any developing problems or unsafe conditions.
MAKE CERTAIN
TO THOROUGHLY INSTRUCT ALL OPERATORS IN THE PROPER USE AND
SERVICE
OF THIS EQUIPMENT.
Take special note of the Operating Precautions listed on page
ii before attempting to operate the dryer.
Keep the dryer clean. Do not allow fine material to accumulate in the plenum chamber.
A
CAREFUL OPERATOR IS THE BEST INSURANCE AGAINST AN ACCIDENT.
WARRANTY
ffi Corporation warrants its products to be free of defects in material and workmanship. The only obligation of the manufacturer is to
repair or replace products which have been submitted and found to be defective within 12 months after installation. If so found
defective, the products will be repaired or replaced without charge, this constituting and entirely fulfilling the warranty obligation. IIi
assumes no liability for expenses incurred without written authorization; in no event shall its liability 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. Some
components supplied by manufacturers are warranted separately by those suppliers. This warranty is exclusive and in lieu of all
other warranties, expressed or implied. ffi reserves the right to make design or specification changes at any time, without any
contingent obligation to purchasers of products already sold.
All instructions, with the exception of those concerning safety, shall be construed as recommendations only; because of the many
variable conditions in actual installation, IIi assumes no liability for results arising from the use of such recommendations.
Copyright © 1992 by ffi Corporation. All rights reserved. No part of this publication may be used or reproduced in any form or by any
means without prior permission. Failure to comply with this notice is a violation of United States copyright laws.

CONTENTS
OPERATING PRECAUTIONS ................. ii Dryer Shutdown
............................... 5·2
Operating Instructions Chart
...................... 5·3
Drying Time
Table· C·2125A (Fig. 5·1) .............. 5·3
Drying Time
Table· C·2130A & C·2140A (Fig. 5·2) ..... 5·4
SECTIONONE SREGIHIGA'mI0NS"
Start·up Procedure (Fig. 5·3) ...................... 5·5
C·2125A Continuous Flow Operation (Fig. 5·4)
......... 5·6
General Specs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1·1
Spec Chart ................................. 1·2 C·2130A Continuous Flow Operation (Fig. 5·5)
......... 5·7
C·2140A Continuous Flow Operation (Fig. 5·6)
......... 5·8
Auger Specs
............................... 1·3
SCR Specs
................................ 1·6
SECTlON$lX DRYER 1l.[l.[USTRA'mI0NS
SECTIONlWO mRA'NSR0RmAmI0N & INSTAl.[l.[A'mI0N
TRANSPORTING DRYER ........................ 2·1
SECTIONSEVEN SERYIGE
INSTALLATION ............................... 2·1
FUEL CONNECTION ........................... 2·3 Seasonal Inspection and Service
................... 7·1
ELECTRICAL POWER SUPPLY ................... 2·5 Burner Control Sequence of Operation
............... 7·2
Propane Vaporizer Seasonal Inspection
.............. 7·3
Vaporizer Adjustment
........................... 7·3
Fan Propeller Removal and Installation
.............. 7·4
SECTIONllIREE 0RERAmiNG G0NTR0l.[S. Browning Taper·lock Bushing Bolt Tightening Torques . 7·6
Fan Motor Removal and Installation
................. 7·6
Control Stop/Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3·1
Fan Switches ................................. 3·1
Main/Safety Gas Shut·Off Valve ................... 3·1
Burner Switches ............................... 3·1
Plenum Temperature Controls
..................... 3·2
Load Auger Switch
......... . . . . . . . . . . . . . . . . . . . . 3·3
Load (Top Auger) Timer
......................... 3·3
Unload Auger Switch
........................... 3·3
Heater Parts Removal and Installation
............... 7·7
Grain and Plenum Temperature Sensor Locations
...... 7·8
SCR Drive and Meter Roll Information
............... 7·9
Meter Roll Blockage
............................ 7·9
How To Determine Metering Problem
............ 7·10
To Locate The Jam
......................... 7·10
To Clear Jam From Meter Roll
................. 7·10
SCR Motor Control
............................ 7·10
Meter Roll Controls
............................. 3·4
Meter Roll Selector Switch
...................... 3·4
Manual Unload Control Dial
.................... 3·4 SECTION EIGHT
WIRING DIAGRAMS
% Unload Rate (Meter Roll) Volt Meter ............. 3·4
Vari·Trol Moisture Control
........................ 3·4
Operating with Moisture Control
.................. 3·5
Dryer Operator Light
............................ 3·5
Hour Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
... 3·5
Meter Roll Monitor System
...................... 3·5
Shutdown Indicators
............................ 3·6
Power
Circuit· 230V 141 C·2125A models ............ 8·1
Power Circuit· all 3q, models ...................... 8·2
General Control Circuit (2 pages)
............. 8·3 to 8·4
Safety Shutdown Circuit
......................... 8·5
PL·021 Burner Control Circuit
..................... 8·6
Restarting Dryer after a Shutdown
................ 3·7
Hinged Fast·Trip Cleanout
....................... 3·6
SEC'nONNINE TROUBl.[ESH00TING
SECTION FOUR TEST HIRING
SECTION AVE DRYER ORERATI0N
Drying Temperatures ........................... 5·1
Full Heat Drying ............................... 5·1
Final Moisture Content .......................... 5·1

OPERATING PRECAUTIONS
1. Read and understand the operation manual 9. Do not operate the dryer if any gas leak is
before attempting to operate the unit. detected. Shut down and repair before
further operation.
2.
Keep ALL guards, safety decals, and safety
devices in place. Never operate dryer while 10. Clean grain is safer and easier to dry. Fine
guards are removed. material can be highly combustible, and it
also increases resistance
to air flow and
3. Keep visitors, children, and untrained personnel requires removal of extra moisture.
away from dryer at
all times. 11. Use CAUTION
in working around high speed
4. Never attempt to operate the dryer by jumping or fans, gas burners, augers, and auxiliary
otherwise bypassing any safety devices on the conveyors which start automatically.
unit. 12. Be certain that capacities of auxiliary
5. Always set the main power supply disconnect conveyors are matched to dryer auger
switch to OFF and lock
it in the OFF position capacities.
using a padlock before performing any service or
maintenance work on the dryer or the auxiliary 13.
Do not operate in an area where
conveyor equipment. combustible material will
be drawn into
the fan.
6. Before attempting to remove and reinstall the
propeller, make certain to read recommended 14. The operating and safety recommendations
procedure listed
in Section 7 -SERVICE. in this manual pertain to the common cereal
grains
as indicated. When drying any other
7.
Keep the dryer and wet holding equipment grain or products, consult the factory for
CLEAN.
Do not allow fine material to additional recommendations.
accumulate. 15. Routinely check for any developing gas
8. Set pressure regulator to avoid excessive gas plumbing leaks. Check to ensure that
pressure applied to a burner during ignition and vaporizer
on LP models does not come into
when burner
is in operation. See Fig. 2-3 for contact with burner vanes.
operating gas pressures.
Do not exceed
maximum recommended drying temperatures.
ii

TYPE:
Continuous flow, single module with two fan-heater
units and two temperature zones provided for
Dry &
Cool or Full Heat dryeration process. The upper
temperature zone and fan-heater
is sized larger
than the lower
to optimize Dry-Cool operation.
GRAIN COLUMNS:
Two 14" galvanized steel grain columns. Solid
column dividers every two feet. Grain movement
through columns
is controlled by the advanced
electronic variable speed Vari-Trol VMD metering
roll drive system designed to precisely control grain
moisture.
FANS:
Two heavy-duty direct driven, quiet, vane axial fans
with full motor overload protection. All fans run
at
1750 RPM, with the exception of the 3500 RPM
cooling fan of the C-2125A. Air Volume, HP and
static pressure are matched to grain volume.
e
0'-8'
15'-2'
HEATERS:
Two high capacity direct-fired, efficient "Star Fire"
burners with full electric ignition. Electronic temper-
ature control for precise drying heat. Stainless
steel burner
on upper fan of C-2140A models.
AUGERS:
Automatically controlled top leveling augers with
power circuit for simultaneous operation of auxiliary
loading conveyor. Bottom auger unloads grain
discharged from metering rolls. Power circuits for
loading and take away conveyors are standard.
Heavy-duty construction.
AUTOMATIC CONTROL:
Automatic 'control of all functions: loading, drying,
cooling, and discharge. Full safety control system;
automatic shutdown on wet grain outage, grain
Hi
Limit, and discharge safety shutoff. Safety circuit
shutdown indicators.
8'-0'
5;::' .. {;; 10
I
D I J U
--,---
-
2'-2'
STD
A
BODY
B
C
.n1~
1 1 J
L 0'-8' REINFORCED
----......,..-4'-10'- CONCRETE FOUNDATION
SUGGESTED FOUNDATION
.. ELECTRICAL SERVICE
III FUEL SERVICE
Fig, 1-1 Dryer dimensions.
MODEL
C-2125A
C-2130A
C-2140A
A B C D
18'-0'
25' 26'
16' MIN.
20'-0' 27' 28'
16' MIN.
26'-0' 33' 34'
16' MIN.
SPECIFICATIONS 1-1
NO. OF APPROX. \.IEIGHT
SUPPORTS
\.1/ TRANSPORT KIT
7
8200
7
9700
9 12600
I ~ 6'-4'j
L 8'-0'
21ADIMI, D~G

I FIG. 1-2 DRYER SPECIFICATIONS I
C·2125A C-213OA C·2140A
Basic Construction 1 Module with 2 Zones 1 Module with 2 Zones 1 Module with 2 Zones
Grain Column by Length
lS'
20' 26'
Grain Column Width 14" 14" 14"
Holding Capacity (total) 535 Bu. 595 Bu. 775 Bu.
Holding Capacity (dry and cool) 415 Bu. 460 Bu. 600 Bu.
Transport Length (hitch to dis. auger) 27-1-1/2" 29'-1-1/2" 35'-1-1/2"
Transport Width
S'-O" S'-O" S'-O"
Transport Height 12'-10" 12'-10" 12'-10"
Installed Length 25'-0"
27-0"
33'-0"
Installed Width
S'-O"
S'-O·
S'-O'
Installed Height (above foundation 15'-10· 15'-10" 15'-10"
supports')
Fans Dry
36' Dia, 1750 RPM, 15 HP
39" Dia, 1750 RPM, 20 HP 39" Dia, 1750 RPM. 25 HP
Cool 24"
Dia, 3500 RPM, 10 HP
2S" Dia, 1750 RPM, 13 HP 28" Dia, 1750 RPM, 13 HP
Heaters -Max. Capacity (Millions)
Top Heater 4.6
MM BtuIHour 6.0 MM BtuIHour 7.5 MM Btu/Hour
Btm. Heater (for full heat operation) 2.3
MM Btu/Hour 3.0 MM BtuIHour 3.0 MM Btu/Hour
Top Auger
S" Dia, 5 HP
S' Dia, 7.5 HP S" Dia, 10 HP
Capacity 2800 BU.lHour 2800 Bu.lHour 2800 Bu.!Hour
Bottom Auger
S" Dia, 3 HP
S" Dia, 5 HP S' Dia, 7.5 HP
Capacity -Maximum Rate2 1220 Bu.!Hour 1350 Bu.lHour 1760 BU.!Hour
Meter Roll Drive 3/4 HP, SCR 3/4 HP, SCR 3/4 HP, SCR
Electric Load (fans, top & btm. auger)3
Single Phase 230V 180 Amps NA NA
Three Phase 230V 100 Amps
12S Amps 146 Amps
Three Phase 460V 50 Amps 64 Amps 73 Amps
Drying Capacity -Shelled Corn·
Dry & Cool 25-15% 300
BPH
350 BPH 455 BPH
Dry & Cool 20-15% 505
BPH
595 BPH 774 BPH
Full Heat 25-15%5 515 BPH 600 BPH 780 BPH
Full Heat 20-15%5
S35 BPH
980 BPH
1274 BPH
1. 24" high supports required for heat redaimer installation.
2. Actual discharge rate is controlled by meter roll speed adjustment, at 5% to 100% of maximum rate.
3. Excludes auxiliary load and unload conveyor equipment.
4. Capacities listed are wet bushels at listed input moisture content and are estimates based on drying principles, field results,
and computer simulation. Variances may occur due to physiological grain factors (kernel size, chemical composition, variety,
maturity), excessive fines, adverse weather conditions, etc.
5. Grain discharged hot from the dryer at approximately 17% output moisture should result in a final moisture content of
approximately 15% after cooling (dryeration).
SPECIFICATIONS 1-2

I FIG. 1-3 AUGER DRIVE DATA I
AUGERS MOTOR SPROCKETS SHEAVES
Approx. Drive Driven
Capacity Drive Drive Driven PDlHub PDlHub
Size Bu.lhr.l
HP 3 RPM Belts Chain (Teeth) (Teeth) Bore Bore
Top Auger:
C·2125A 8" 2800 5 1750 BX·120 (2)
---- ----
-_ ....
3.6"/1·1/8" 18.4"/1·1/2"
C·2130A 8" 2800 7.5 1750 BX·120 (2)
----
-_ ....
----
3.6"/1·318" 18.4"/1·1/2"
C·2140A 8" 2800 10 1750 BX·120 (2) --
....
........
----
3.6"/1·318"
18.4"/1-112"
Bottom Auger:
C·2125A 8" 1220 2 3 1750 BX·93 (2) #50 15
48 2.8"/1-118"
10.4"/1·1/4"
C·2130A
8" 1350 2 5 1750 BX·93 (2) #50 15 48 3.6"/1·1/8"
12.4"/1·114"
C·2140A 8" 1760 2 7.5 1750 BX·93 (2) #50 25 48 3.2"/1·3/8" 13.4"/1·1/4"
1.
Dryer auger capacities and power requirements vary with grain moisture content and amount of fine material in
grain.
2.
This BuJHr. listing represents the maximum meter roll discharge rate. The bottom auger capacity exceeds the
maximum meter roll rate.
3.
Standard output auger motors listed.
SPECIFICATIONS 1-3

I FIG. 1-4
seR DRIVE INFORMATION and DATA I
APPROXIMATE DISCHARGE RATE -BU/HR at VARIOUS SETIINGS
Setting 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 80% 90% 100%
C-2125A 122 183 244 305 366 427 488 549 610
671
732 793 854 976 1098 1220
C-2130A 135 202 270 337 405 472 540 607 675 742 810 877 945 1080 1215 1350
C-2140A 176 264 352 440 528 616 704 792 880 968 1056 1144 1232 1408 1584 1760
SCR DRIVE DATA
C-2125A C-2130A C-214OA
SCR
Control· Part No. & Supply
Voltage 415-2302-8. 230V 415-2302-8. 230V 415-2302-8. 230V
DC MOTOR
PART NO. 002-1192-0 002-1192-0 002-1192-0
HORSEPOWER & SET RPM 3/4 hp, 1600 rpm 3/4 hp. 1600 rpm 3/4 hp, 1600 rpm
TYPE
SW SW SW
SET VOLTAGE (ARM) 155 155 155
FULL LOAD AMPS (ARM) 3.9 3.9 3.9
MOTOR SHEAVE
PITCH DIA. 3.0 3.0 3.0
NO. AND BORE AK32H. H·S/8" AK32H. H-5/8 AK32H. H·S/8
GEARBOX· PART NO. & RATIO 017-1393-2.50:1 017-1393-2.50:1 017-1403-9.50:1
GEARBOX DRIVE
INPUT SHEAVE
PITCH DIA. 5.7" 5.7" 5.7"
BORE H-5/8 H·S/8 H-7/8
BELT A26 A26 A26
OUTPUT SPROCKET NO. & BORE H4015-1.
H-1 1/8 H4015-1, H-1 1/8 H40H15, H-1 1/8
CHAIN #40 x 106" #40 x 106" #40 x 106"
METER ROLL
TYPE & MAX. RPM 6 Flute. 8.42 rpm 6 Rute. 8.42 rpm 6 Flute. 16.62 rpm
DRIVE SPROCKET NO. & BORE 40H30,
H-1
40H30, H-1
40H30. H-1
SPECIFICATIONS 1-4

% ~
SECmlON mwo mRI'~r5JllmfRm~mlmN IlINlm~Unl~mlmN
TRANSPORTATING DRYER
The dryer is available with an optional Transport Kit for transporting the unit by truck or tractor. Make
certain to observe the following safety precautions:
1. Recommended towing hitch height: 16 to 17
inches.
2. Hitch pin to be not less than 3/4 inch in dia. and
securely fastened so it will not come out in travel.
3. Use a safety chain.
4. Dryer must be towed empty and in accordance
with applicable state or provincial regulations.
5. Recommended tire pressure 55-60 psi (cold).
6. Maximum towing speed: 45 mph
7. After first 50 miles and every 200 miles
thereafter:
a. Check temperature of transport
wheels' hubs and spindles
immediately after stopping.
Temperature should not exceed
150°F. May
be hot to touch, but not
melting lubricant.
b. Check wheel lug bolts; they are factory
torqued at 115
to 120 ftllbs. Retighten,
if required, to approximately 90 ftllbs.
INSTALLA mlON
SYSTEM LAYOUT -Consider the grain handling system and location of storage bins and existing con-
veyors
in selecting the dryer site, to facilitate wet grain supply and dry grain discharge to conveyors.
SITE SELECTION -The dryer
is not to be operated inside a building or in any area not permitted by
electrical codes, fuel installation regulations, or insurance requirements.
Do not operate in an area
where combustible material can be drawn into the fans. Maintain the required minimum distance from
other structures. Refer
to Fig. 1-1 for dryer dimensions.
FILLING POINT -Wet grain must enter the dryer
at the hopper at the rear end of the top auger, since
the top auger moves grain forward, toward the paddle switch controlling the top auger (except for
special build front-loading units).
WET GRAIN SUPPLY - A wet holding bin may be utilized to supply grain
to the dryer, with gravity flow
into the dryer loading conveyor. Also, gravity flow from a wagon or truck into a loading conveyor may
be used to fill the dryer. The top leveling auger will accept grain at any rate up to its maximum
capacity as listed in Fig. 1-2.
In any case, the dryer must have a constant supply of wet grain. Auxilia-
ry loading conveyors should be sized to nearly match the capacity of the top auger, to avoid air loss
problems caused by underfilling during high drying rate operations.
WET GRAIN LOADING -The dryer will automatically start the top auger and any loading conveyor
electrically connected to the power terminal strip on the power panel (see Section 8 - Wiring Diagrams).
At the beginning, dryer will completely fill, requiring approximately its full holding capacity. During
drying, the top auger will start
and stop as required to maintain the dryer full of wet grain.
TRANSP. & INSTALL.
2-1

LOAD TIMER -The unit is equipped with a top auger Load Timer (inside ASC control box), to provide
automatic shutdown on wet grain outage,
if the top auger operates for a time exceeding the timer
setting (field adjustable).
DISCHARGE AUGER EXTENSIONS -Special discharge auger extension kits are available, with an
additional length of 1 to 10 feet (one foot increments) to provide
dry grain discharge points at various
distances from the rear of the dryer, for direct discharge into elevator legs or other conveyors.
Extensions are available with either a solid or perforated tube.
AUXILIARY CONVEYOR OVERLOAD RELAYS -Overload relays for the loading conveyor and take-
away conveyor are factory equipped with heater elements as listed in Figs. 2-4 to 2-6 for motors on
auxiliary conveyors.
If other HP ratings are used, it is necessary to change the heater elements to
provide proper running load protection for the motors.
DRYER FOUNDATION -The wheels are provided only for transportation of the empty dryers to the site
location. Before assembling and installing the dryer, prepare a level, secure foundation, with provisions
for dryer tie-down.
NOTE:
If the dryer is to be equipped with an optional Heat Reclaimer Package, also refer to
instructions included with the Heat Reclaimer. Heat Reclaimers for C-2100A dryers include special
dryer support structures which are intended for a conventional, flat type concrete foundation.
DRYER PREPARATION
1. Remove Parts -Remove hopper and other parts shipped inside dryer.
2. Wet Bin -Fold up the wet bin, assemble the top auger drive and connect fill hopper as described in
bulletin CIWB-01-2.
3. Install Fill Hopper as shown in CIWB-01-2.
4. Connect Electrical and Fuel.
5. Inspection & Testing -Thoroughly inspect dryer to make certain all parts have been properly
installed and tightened. See FUEL CONNECTION and ELECTRICAL POWER SUPPLY headings
in this section for important fuel and electrical requirements. Check that all gas fuel lines are free of
leaks. Also check vaporizer assembly on all liquid propane models to ensure that vaporizer coil
does not contact the burner vanes; see Section 7 - SERVICE, for vaporizer coil inspection details.
After dryer and all systems have been completed, start dryer and check it for proper operation as
outlined in Section 4 - TEST FIRING.
TRANSP. & INSTALL. 2-2

FUEL CONNECTION
LIQUID PROPANE (LP) DRYERS WITH INTERNAL VAPORIZERS
LIQUID DRAW -The dryer is designed to operate on liquid propane, with liquid draw from the supply tank.
A piping system is provided on the dryer, including strainer, pressure relief valve, and manual shut-off
valve; a pressure regulator
is provided on each fan-heater unit, between the vaporizer and burner.
AMMONIA TANKS -
Do not use propane supply tanks which have previously contained ammonia or
fertilizer solutions. These substances are extremely corrosive and damaging to fuel supply and burner
parts.
OIL OR WATER
IN TANKS -With liquid draw from the supply tank, any water present in the tank may
freeze in the piping and controls
in cold weather. To ensure that tanks are free of moisture, the usual
precaution
is to purge with methanol. Avoid tanks which may contain an accumulation of oil or heavy
hydrocarbons from long use on a vapor withdrawal system.
NATURAL GAS (NG)
GAS VOLUME AND PRESSURE -The dryer is designed to operate on natural gas having a heat value
of about 1,000 BTU per cubic foot. The dryer
is equipped with a natural gas supply pipe system connected
to the heater solenoid valves. A regulated pressure of 8 to 10 PSI must be provided at the connection to
the dryer, with gas available in sufficient volume to maintain operating pressure.
CONNECTION TO LIQUID
MANIFOLD ON DRYER
USE A FLEXIBLE CONNECTION
HOSE DESIGNED FOR LP GAS.
seE FIG. 2-3 FOR
RECOMMENDED LINE SIZE.
FUEL SUPPLY SYSTEM SHOULD
CONFORM WITH NATIONAL FIRE
PROTECTION ASSOCIATION STANDARDS.
CONSULT PROPANE SUPPLIER FOR
PROPER FITIINGS, CONNECTION
HOSE, AND SAFETY CONTROLS
REaUIRED TO MEET STANDARDS.
DO NOT USE A PRESSURE
REGULATOR AT THE SUPPLY TANK.
OPEN LP SHUT ~FF VALVES SLOWLY
TO PREVENT ACCIDENTAL CLOSING
OF EXCESS FLOW VALVES.
Fig. 2-1 Liquid propane (LP) fuel supply.
TRANSP. & INSTALL. 2-3
PROPANE SUPPLY TANK.
RECOMMENDED MINIMUM
OF 1,000 GALLONS CONNECTED
FOR LlaUID DRAW.

CONNECTION TO NATURAL
GAS MANIFOLD ON DRYER
SEE FIG. 2·3 FOR
RECOMMENDED LINE SIZE.
Fig. 2-2 Natural gas (N) fuel supply.
NATURAL GAS METER AND REGULATOR.
SEE FIG. 2·3 FOR REQUIRED PRESSURE
AND TYPICAL MAXIMUM FUEL FLOW RATES.
FIG. 2-3 FUEL SYSTEM SPECIFICATIONS and RECOMMENDATIONS
C·2125A C·2130A C·2140A
Top Btm. Top Btm. Top
Btm.
Maximum Heat Capacity (Million Btu.lHr.) 4.6 2.3 6.0 3.0 7.5 3.0
Total Max Fuel
Flow· *GaI.lHr. 75 98 114
Liquid Recommended Liquid Line Size
1/2"
1/2" 1/2"
Propane
(LP) Heater Orifice Drill Size .281" .218" .344" .250" .500" .250"
Operating Pressure Range (PSI) 5·22 5·22 3·8 5·22
(Heater Pressure Gauge)
Total Max Fuel Flow * (Thou. 4.6 2.3 6.0 3.0 7.5 3.0
Cubic Ft.lHr.)
Minimum Pressure at Connection 8 8 8
to Dryer,
PSI
Natural
Gas Recommended Minimum Line
Size·
2" 2" 2.5"
(N) 100' Dist.
Heater Orifice Drill Size .438" .312" .500" .375" .625" .375·
Operating Pressure Range (PSI) 3·8 3·8 3·8
(Heater Pressure Gauge)
• Maximum fuel flow rates listed assume full heat output for gas line sizing purposes.
In normal operation the flow rates would be considerably lower than indicated, due
to
actual pressure setting used and cycling of burner.
TRANSP. & INSTALL. 2A

ELECTRICAL POWER SUPPLY
POWER SUPPLY - An adequate power supply and proper wiring are important factors for maximum
performance and long life of the dryer. Electrical service must
be of adequate size to prevent low volt-
age damage to motors and control circuits.
All dryers should be field provided with a dependable
equipment ground. Electrical power supply should conform to local, state, or provincial requirements.
POWER SUPPLY DISCONNECT -
All dryers should be equipped with a power disconnect switch
external to the ASC Control Box
to permit total power shutdown before opening ASC dead front, as
required for inspection and service. The power disconnect switch should be located close to the dryer
for quick shutdown.
TRANSFORMERS WIRING VOLTAGE DROP -Contact the service representative of the power
supplier,
to advise of the additional load to be placed on the line. Check on KVA rating of transformers,
considering total horsepower load. The power supply wiring, main switch equipment, and transformers
must
be capable of providing adequate motor starting and operating voltage. Voltage drop during
motor starting should not exceed 14% of normal voltage, and running voltage (after motor
is at full
speed) should be within 8% of normal voltage.
ELECTRICAL LOAD -Figs. 2-4
to 2-6 indicate the electrical load in horsepower and full load current,
for motors on the dryer, and for auxiliary loading and take-away conveyors which can
be directly
connected
to the power circuits in the dryer control panel.
OVERLOAD RELAYS -Most overload relays are adjustable from 85% to 115% of normal load in
amperes by
an adjustment knob in each relay (see Overload Relay Heater specs in Figs. 2-4 to 2-6).
Dryers are shipped with overload relay heater elements installed for the auxilliary conveyor motor sizes
as listed in Figs. 2-4 to 2-6. If different motors are used, the heater elements must be changed to
provide adequate motor overload protection.
CONNECTING AUXILIARY CONVEYORS
The maximum sizes of auxiliary conveyor motors which can be powered directly from the dryer's power
terminals are listed
in Figs. 2-4 to 2-6. See appropriate power circuit wiring diagram for terminal
connection numbers.
To connect auxiliary auger motors which are LARGER than the maximum, refer to the following
information.
A. Motors that must be powered from a source outside the dryer must use a separate contactor and
overload protection device for each motor.
B. For automatic operation with 230V 3-phase dryers: use 230V contactor coils and connect LOADING
coil
to POWER TERMINALS 7 and 9. Connect UNLOADING coil to POWER TERMINALS 13 and 15.
C. For automatic operation with 460V 3-phase dryers: either use a control stepdown transformer to
power 230V contactor coil,
or use 460V contactor coils and connect them as described in item B above.
D. When conveyor motors are powered from an external source and they are connected for automatic
operation, their overload protective switches should
be connected in series and then connected into the
dryer safety circuit. For recommended connections, refer to motor overload protection connections
shown
in the SAFETY CIRCUIT wiring diagram in Section 8.
TRANSP. & INSTALL. 2-5

FIG. 2-4 C-212SA ELECTRICAL LOAD, OVERLOAD
RELAYS, & CIRCUIT BREAKERS
Top Bottom Auxiliary
Voltage
Fan Motor Auger Auger Conveyor1
Horsepower 1-PH -230V Top 10/16 5 3 7.5 (two)
Btm 10
3-PH -230V Top 10/16 5 3 7.5 (two)
Btm
10
3-PH -460V Top 10/16 5 3 7.5 (two)
Btm 10
Full Load 1-PH -230V Top 83
22 16 34
Current (amps) Btm 58
3-PH -230V Top
41
13 8.6 20
Btm 34
3-PH -460V Top 20.5 6.5 4.3 10
Btm 17
Max Running 1-PH -230V 179
Load (dryer 3-PH -230V
96
only, amps) 3-PH -460V 48
Overload Relay 1-PH -230V Top F84.8 C22.8 C15.1 C30.3
Heater Element Btm F65.8
Spec. 3-PH -230V Top C44 C16.3 C11.3 C22.8
Btm C33.0
3-PH -460V Top C25 C8.67 C5.92 C13.7
Btm C18.0
Circuit Breaker 1-PH -230V Top 100 80
80
---
2
Rating -amps Btm 80
3-PH -230V Top 90 60
60
---
2
Btm 60
3-PH -460V Top 50 30 30
---
2
Btm 50
1.
The motor current and maximum dryer running loads listed are based upon 7.5
HP auxiliary conveyor motors. The maximum size motor which can be powered
directly through the dryer ASC control is 10 HP (3-Phase, 230V). All larger than
maximum auxiliary conveyor motors require separate contactors and overload
protectors with coil circuits connected to the dryer for automatic operation.
IMPORTANT:
All standard Model C-2125A dryers are factory equipped with
overload relay heater elements sized for 7.5 HP auxiliary motors.
If the actual
auxiliary motors used are of a different size, the elements must
be changed.
2.
Auxiliary motors are controlled by the top and bottom auger circuit breakers.
TRANSP.&INSTALL. 2~

FIG. 2-5 C-2130A ELECTRICAL LOAD, OVERLOAD
RELAYS, & CIRCUIT BREAKERS
Top Bottom Auxiliary
Voltage Fan Motor Auger Auger Conveyor 1
Horsepower
3·PH·230V Top 20 7.5 5 10 (two)
Btm 13
3·PH . 460V Top 20 7.5 5
10 (two)
Btm 13
Full Load 3·PH • 230V Top 50 20 13 26
Current (amps) . Btm 34
3·PH • 460V Top 25 10 6.5
13
Btm 17
Max Running 3·PH • 230V 117
Load (dryer
only, amps) 3·PH • 460V
59
Overload Relay 3·PH • 230V Top
E76
C22.S C16.3 C30.3
Heater Element
Btm C36.6
Spec. 3·PH • 460V Top 27.3 C13.7 CS.67 C16.3
Btm 21.4
Circuit Breaker 3·PH • 230V Top 100 90 90 ...2
Rating • amps Btm 60
3·PH • 460V Top 50 50 50 ...2
Btm 50
1.
The motor current and maximum dryer running loads listed are based upon 10 HP
auxiliary conveyor motors. The maximum size motor which c~n be powered
directly through the dryer ASC control is
15 HP (3·Phase, 230V). All larger than
maximum auxiliary conveyor motors require separate contactors
and overload
protectors with coil circuits connected to the dryer for automatic operation.
IMPORTANT:
All standard Model C·2130A dryers are factory equipped with
overload relay heater elements sized for 10 HP auxiliary motors.
If the actual
auxiliary motors used are of a different size, the elements must
be changed.
2.
Auxiliary motors are controlled by the top and bottom auger circuit breakers.
TRANSP. & INSTALL. 2·7

FIG. 2-6 C-2140A ELECTRICAL LOAD, OVERLOAD
RELAYS, & CIRCUIT BREAKERS
Top Bottom Auxiliary
Voltage Fan Motor Auger Auger Conveyor 1
Horsepower 3-PH -230V Top 25 10 7.5 10 (two)
Btm
13
3-PH -460V Top 30 10 7.5 10 (two)
Btm 13
Full Load 3-PH -230V Top 66 26 20 26
Current (amps) Btm 34
3-PH -460V Top
33
13 10 13
Btm 17
Max Running 3-PH -230V 146
Load (dryer
only, amps) 3-PH -460V 73
Overload Relay 3-PH -230V Top
E78 C30.3 C22.8 C30.3
Heater Element Btm C36.6
Spec. 3-PH -460V Top
E69 C16.3 C13.7 C16.3
Btm C21.4
Circuit Breaker 3-PH -230V Top 100 90
90
---
2
Rating -amps Btm 60
3-PH -460V Top
50
50 50
---
2
Btm 50
1. The motor current and maximum dryer running loads listed are based upon 10
HP auxiliary conveyor motors. The maximum size motor which can be
powered directly through the dryer ASC control is
15 HP (3-Phase, 230V). All
larger than maximum auxiliary conveyor motors require separate contactors
and overload protectors with coil circuits connected to the dryer for automatic
operation.
IMPORTANT:
All standard Model C-2140A dryers are factory equipped
with overload relay heater elements sized for
10 HP auxiliary motors. If
the actual auxiliary motors used are of a different size, the elements must
be changed.
2. Auxiliary motors are controlled by the top and bottom auger circuit breakers.
TRANSP. & INSTALL. 2-8

CONTROL STOP/START
The Main Control circuit is energized by pushing the green START button. The green light on the
START button indicates the control circuit
is ON and that all the safety switches are reset.
Push the red STOP button
to stop the dryer control circuit.
FAN SWITCHES
The group of FAN switches controls the UPPER and LOWER fan motors. The green START button
will light when the fan motor contactor has been energized.
MAIN/SAFETY GAS SHUT-OFF VALVE
VALVE OPERATION -This valve is an electrically energized, manual reset type valve. The valve's
electric solenoid is energized only when the dryer CONTROL CIRCUIT
is turned ON. See Figs. 6-1
and 6-2 for valve location.
The valve has a
'1ree handle" lever that cannot allow gas flow to the dryer until the dryer control circuit
is energized. Only then does the lever engage to allow the handle to be manually raised to the latched
position, thereby opening the valve. The valve will trip closed instantly when its solenoid
is
de-energized or when the lever is rotated to the closed position.
An "open" and "shut" indicator is provided on the side of the Main/Safety Shut-off valve. (An orange
indicating
bar aligns itseH with the words "open" or "shut.") See Fig. 6-2.
BURNER SWITCHES
The group of BURNER switches controls the UPPER and LOWER burners. Each burner switch has a
red light to indicate a LOCKOUT condition.
Each burner
is ignited by turning the appropriate burner switch ON. Ignition should take place after a
short purge time.
NOTE:
In order to light the burner, the Main/Safety Gas Shut-off Valve must be manually reset to
OPEN and the appropriate fan must be ON.
Both burner switches should be ON for FULL HEAT drying. The lower burner switch should be OFF for
DRY/COOL drying. Tum the burner selector switch OFF to stop each burner.
A dryer shutdown will occur and the appropriate burner LOCKOUT light will be energized
if the bumer
fails to ignite or the burner flame
is not sensed for a period of approximately 60 seconds. Several
minutes may be required to allow the lockout
to automatically reset itseH before ignition may again be
attempted.
OPERATING CONTROLS
3-1

PLENUM TEMPERATURE CONTROLS
PLENUM CONTROLLER OPERATION -Drying temperatures are controlled by the Electronic
Temperature (ET) plenum controllers located
on the ASC control panel. Each fan-heater is controlled
by a separate controller (see Fig. 6-9).
The controller senses the air plenum temperature and cycles the burner from Hi-Fire
to Lo-Fire
operation to maintain the desired drying temperature
AS INDICATED BY THE PLENUM
TEMPERATURE INDICATOR ON THE ASC PANEL.
C~ECKING AND ADJUSTING PLENUM TEMPERATURE - To determine drying temperature within the
air plenum chamber(s), depress the appropriate CHECK SWITCH (labeled "HOLD TO READ") and
observe temperature indicated on the meter.
To reset the plenum drying temperature, simply rotate the
proper adjustment knob
to the desired temperature setting. The ET system will automatically cycle the
burner
to maintain the set temperature (see Fig. 6-9).
ADJUSTING THE
HVLO FIRE PRESSURE
HI-FIRE
-- LO-FIRE -When a heater is operating on Hi-Fire, its burner is supplied with a relatively
large flow of gas from both the Hi-Fire gas solenoid valve
and the Flow Control valve. When a heater
is operating on Lo-Fire, only the Flow Control valve supplies gas flow to its burner.
PROPANE HI-FIRE -On propane models, the Hi-Fire gas pressure for the burner
is controlled by the
Gas Pressure Regulator. For maximum heat capacity, the regulator should be adjusted WHILE
OPERATING
ON HI-FIRE to provide maximum burner pressure, as shown by the pressure gauge on
the unit. For max. pressure, see
Fig. 2-3 -Fuel System Specifications (maximum listing for LP "Oper-
ating Pressure Range").
NATURAL GAS HI-FIRE -For natural gas models, the Hi-Fire gas pressure
is controlled by adjusting
the large Manual Shut-off valve within the line which supplies the fan-heater. For maximum heat, set
the shut-off valve to provide approx. 8
PSI of pressure WHILE BURNER IS OPERATING ON HI-FIRE.
For max. pressure, see Fig. 2-3 -Fuel System SpeCifications (maximum listing for Natural Gas "Oper-
ating Pressure Range").
LO-FIRE -The Lo-Fire gas pressure
is controlled by the Flow Control valve (see Fig. 6-4).
PROPANE LO-FIRE -On propane models, set the Lo-Fire gas pressure to the lowest setting listed
in
the LP "Operating Pressure Range" in Fig. 2-3, by rotating the knob on the Flow Control valve. Lock
setting with
an Allen wrench after making this adjustment. Burner must be operating on Lo-Fire when
making this adjustment.
NATURAL GAS LO-FIRE -For natural gas models, turn the Flow Control valve handle to provide the
lowest pressure listed for (N) "Operating Pressure Range"
in Fig. 2-3, while the burner is operating on
Lo-Fire (see Fig. 6-4).
BURNER CYCLE -When burner
is operating properly, it should automatically cycle at regular intervals
from Hi-Fire
to Lo-Fire, as indicated by the corresponding pressure change on the gas pressure gauge.
It is not necessary for burner to cycle with short 5 to 10 second intervals, BUT IT IS IMPORTANT
THAT THE BURNER DOES CYCLE OCCASIONALLY.
If the burner remains
in Hi-Fire and does not cycle, increase Gas Regulator pressure setting on
propane models, or the Manual Shut-off valve pressure on natural gas models (see Fig. 6-5), in order
to satisfy the thermostat setting.
DO NOT EXCEED THE MAXIMUM OPERATING PRESSURE
RANGE LISTED
IN FIG. 2-3.
If the burner remains in Lo-Fire and does not cycle, decrease the Lo-Fire gas pressure slightly by
readjusting the Flow Control valve. DO NOT DECREASE THE VALVE SETIING TO THE EXTENT
OPERATING CONTROLS 3-2

WHERE A NOTICEABLE BURNER FLUTTER OR POPPING NOISE CAN BE HEARD, AS CAUSED
BY FLAME BACKFIRE INTO THE BURNER CUP.
LOAD AUGER SWITCH (Top Auger)
The LOAD AUGER switch has three positions: ON, OFF, and AUTO.
The
ON position is recommended when initially filling an empty dryer. With switch ON, the top auger
will operate, but the Load Timer will
be de-energized.
With the switch in either AUTO or ON, the top auger automatically starts and stops,
as required, to
keep the dryer full of grain.
The AUTO switch position
is the normal setting and is used to automatically stop the dryer when the
wet grain supply is exhausted. With switch in the AUTO position, the Load Timer will be energized
whenever the load auger
is operating. If the load auger and timer operate continuously for a period
longer than the timer setting, the timer will automatically shut down the dryer.
LOAD (Top Auger) TIMER
FUNCTION -The top auger loads the wet bin intermittently, depending on when the paddle switch
calls for more grain. The Load Timer checks that the load auger doesn't run beyond the normal time
to
fill the wet grain holding bin. If, due to inadequate wet grain supply, the load auger runs longer than a
normal refill time, the Load Timer causes a dryer shutdown.
The Load Timer, located within the
ASC control box, is an automatic reset type timer. The _ LOW
GRAIN shutdown indicator will light whenever a shutdown
is caused by the Load Timer.
TIMER
SETIING -To set the Load Timer, observe the normal time required to fill the wet bin, then
rotate the front dial
to set timer to the average refill time plus several additional minutes.
NOTE: The Load Timer can
be set to several time ranges of operation. The timer is factory set in
the 60-minute range mode. With this arrangement, the no. 1 mark on the dial face equals 1/6 of
the 60-minute range or
10 minutes.
UNLOAD AUGER SWITCH
The UNLOAD AUGER switch has two positions: OFF or AUTO.
With switch in the AUTO position, the auger runs continuously and the meter rolls are controlled by the
Meter Roll Selector Switch position
(manuaVoff/auto).
With switch in the OFF position, the meter rolls and auger are stopped.
The UNLOAD AUGER switch will energize the meter roll safety circuit monitor. This monitor will cause
a dryer shutdown
if meter roll rotation is not sensed for a period longer than (3) minutes and the
METER ROLL shutdown indicator will
be energized.
OPERATING CONTROLS 3-3

METER ROLL CONTROLS
METER ROLL SELECTOR SWITCH
Switch has three positions: MANUAL, OFF, and AUTO. The UNLOAD AUGER switch must
be ON in
order to operate meter rolls. With switch in the MANUAL position, the meter roll speed
is controlled by
the MANUAL CONTROL dial on the ASC panel (see Fig. 6-9).
With switch in the AUTO position, meter rolls are controlled automatically by the Moisture Controller.
With the Meter Roll Selector set to Manual, the Moisture Controller can only display grain temperature,
but cannot control anything. With Meter Roll Selector set to OFF, the Moisture Controller display
is
also off.
MANUAL UNLOAD CONTROL DIAL
The Manual Control dial sets meter roll speed to a constant unload rate. Set the desired % unload rate
by watching the % Unload Rate
voH meter as the Manual Control dial is adjusted. See Dryer Tables in
Figs. 6-4 to 6-6 for suggested start-up settings.
% UNLOAD RATE (METER ROLL) VOLT METER
The % UNLOAD RATE
voH meter monitors the DC ARMATURE VOLTAGE on the SCR MOTOR
driving the meter rolls. This
voHage represents the % UNLOAD RATE of the dryer and should range
from 7% to 100% as the unload speed
is changed. Be sure to use the % Unload Rate volt meter as
the primary indicator of the % unload rate, as the Manual Control Dial setting will be close to but not as
accurate as the voH meter readng.
VARITROL MOISTURE CONTROL
The Vari-Trol Moisture Control works on the principle that grain moisture and grain temperature are
closely related. Monitoring grain temperature, combined with manual testing of the grain's final
moisture content, will allow the operator to determine the proper temperature/moisture relationship.
Using the digital-display temperature control assembly on the ASC panel, the operator can view the
current grain temperature and set the desired grain temperature (setpoint), in the manner described
as
follows.
NOTE:
As previously stated, with the Meter Roll Selector set to Manual, the Moisture Controller can
only display grain temperature, but cannot control meter roll speed. With Meter Roll Selector set to
OFF, the Moisture Controller display
is also off.
SETIING TEMP
a. Push DISP. (display) button once and current setpoint
will be displayed as indicated by the letters SP
(setpoint) in the lower
LH corner.
b. Raise or lower Setpoint to desired temperature by pu-
shing the triangle buttons to increase or to decrease.
Set
Point
Indicator
Honeywell
r--------,
Aim
18
Grain
Temp
Indicator
c. Push RESET to return to measured temperature. SP
will not be displayed.
If display is inactive for 60
seconds, it will automatically return to measured tem-
perature display. If mOisture control
is turned off while
in the
SP mode, the newly entered setpoint will be
canceled.
Display
Button
-tt--t--:J>
~-i-~ Reset
Button
Increase/
Decrease i1=::::=;;;.......<,",-===rx::
Buttons 0
Vari- Trol Digital Control Assembly
OPERATING CONTROLS 3-4