Sioux Tools S224250 Parts list manual

1
EQM w/Relative Humidity
Sensor Control (S224250)
Owner’s Parts and Instruction Manual
Sioux Steel Company
Sioux Falls, South Dakota 57101
800-557-4689
Manual No. 224252
04-23-2020/KAG
S TEEL COMPAN Y
R

2

3
Contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Fan Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Site Prep Installation………………… . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
EQM Control Instructions
EQM Conditioning Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-18
Components/Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setup and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-26
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electrical Layout/Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
VFD (Vacon) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4
Safety
Read and save these instructions
General Safety Statements
Thank you for choosing a Sioux Steel Company product. It is designed to perform and serve you for many years.
It is the goal of Sioux Steel Company to improve our products whenever it is possible and practical to do so.
Sioux Steel Company reserves the right to change, improve, and modify products at any time without obligation
to make changes, improvements, and modifications on previously sold equipment.
Safety is Sioux Steel Company’s main concern for you and those who are associated with the grain handling
equipment. This manual is written to help you understand safe operating procedures, and some of the problems
that may be encountered by operator or other personnel.
It is your responsibility as owner/operator to know what requirements, hazards, and precautions exist, and to
inform all personnel associated with the equipment. Any alterations to equipment are strictly forbidden. Such
alterations may result in serious injury or death and will void any warranty on product.
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
installation is made.
Carefully review this manual and its safety instructions before installing or operating this unit. Failure to read this
manual and its safety instructions may lead to serious injury or death. If you do not understand any part of this
manual or need assistance, contact your dealer.
Save the manual for future reference by personnel operating or maintaining the unit.
This manual describes the operation of the Equilibrium Moisture and Relative Humidity Controls. This
product is ideal for the conditioning of Corn, Soybeans, and Other Select Grains. Any other use is
considered a misuse of the product.

5
Safety
Recognize the Safety Alert Symbol
The above symbol means “Attention! Be Alert! Your Personal Safety Is Involved!” Note this symbol in instructions for
important issues concerning your personal safety. Read each message carefully to avoid personal injury or death.
Follow Machine Safety Signs & Messages
Observe safe operating practices. Carefully read this manual and all safety signs on your equipment. Safety signs must be
kept in good condition. Replace missing or damaged safety decals or shields. Safety decals and shields are available free of
charge from Sioux Steel Company, 196 ½ E. 6
th
St., Sioux Falls, SD 57101-1265.
Learn how to use controls and operate equipment. Do not let anyone operate unit (especially youth) without thorough training
of basic operating and safety procedures.
Make no unauthorized modifications to equipment. Modifications may endanger function and/or safety of unit. Periodically
check all mechanical and electrical components. Keep unit in good working condition.
Practice Safe Maintenance
Read and understand correct service procedures before operating. Keep area clean and dry to prevent accidents. Machine
should never be lubricated, serviced, or adjusted while it is in operation. Hands, feet and clothing must be kept away from all
moving parts. Keep all parts in good condition and properly installed. Fix any damage immediately. Qualified service
personnel should replace worn or broken parts. Any built-up grease, oil, and debris around machine should be removed.
Emergencies - Know What To Do
A first aid kit should be made readily available.
In the event of fire, a fire extinguisher should be at hand.
Have emergency numbers near your telephone for doctors, emergency medical squad, ambulance service, hospital, and fire
department and also have written directions to your location.
Wear Protective Clothing
•Clothing- Avoid baggy clothes to avoid catching on moving parts.
•Hearing Protection- When high noise levels are encountered, ear plugs or muffs should be used.
•Eye Protection- Safety glasses should be worn at all times to protect eye from debris.
•Gloves- Always wear gloves to protect hands from sharp edges.
•Steel Toe Shoes- Appropriate shoes should be worn to protect toes from falling debris.
•Respirator- In order to prevent breathing toxic fumes or dust, a respirator may be needed.
•Hard Hat- Appropriate headwear should be worn to protect head from falling debris.
•Fall Protection- Appropriate fall protection should be worn when working at elevations greater than six (6)
feet.
Signal Word Color Potential Injury or Damage Likelihood of Occurrence
DANGER Red
Severe
Indicates an imminently hazardous situation which if not
avoided will result in death or serious injury.
WILL Occur
if Warning is ignored
WARNING Orange
Severe
Indicates a hazardous situation which if not avoided will
result in death or serious injury.
COULD Occur
if Warning is ignored
CAUTION Yellow
Minor
Indicates a hazardous situation which if not avoided will
result in minor or moderate injury.
WILL or COULD Occur
if Warning is ignored
NOTICE
Blue
or
Yellow
None
Indicates an important message or instruction not related
to personal injury.
N/A
SAFETY ALERT SIGNAL WORDS

6
Safety
Warning: To reduce the risk of fire, electric shock, or injury to persons, observe the following:
1. Use this unit only in the manner intended by the manufacturer. If you have any questions, contact the
manufacturer.
2. Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting
means to prevent power from being switched on accidentally. When the service disconnecting means
cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel.
3. Installation work and electrical wiring must be done by a qualified person(s) in accordance with all
applicable codes and standards, including fire-rated construction.
Warning: To prevent explosion or fire:
1. Carefully review the operator’s manual.
2. Clean under floor, as fines may cause a bin fire.
3. Do not use to exhaust hazardous or explosive material and vapors.
4. Disconnect and lock out all power sources before servicing equipment.
Warning: Keep clear of all moving parts
1. Keep people (ESPECIALLY YOUTH) away from equipment, particularly during operation.
2. Keep away from all moving parts. Entanglement can cause serious injury or death.
3. Keep inlet guard in place and in good working condition.
4. If fan is wired for suction, outlet must be shielded to protect an individual from moving parts.
Failure to follow the above precautions may cause serious injury or death.
Caution: To avoid electrocution, all equipment must be properly wired and grounded according to electrical
codes. Have unit wired by a qualified electrician.
Have your electrician install a main power disconnect switch capable of being locked only in the Off position.
Mark disconnect clearly as to the equipment it operates. Always Lock Out main power disconnect switch
whenever equipment is not in use or when servicing the unit.

7
Safety
Danger: Never enter bin, unless all power is locked off and another person is present. Rotating augers can kill or
dismember!
Danger: Flowing grain may trap and suffocate. If you enter a bin of flowing grain you can be completely
submerged in grain in seconds. Failure to heed may cause serious injury or death.
Warning: Heater must be electrically interlocked with fan. Never operate heater without airflow. Failure to do so
may cause serious injury or death.
Caution: To avoid personal injury, frequently inspect all mechanical and electrical components. Lock Out all
power whenever servicing equipment. Replace and/or repair worn parts. Be sure all electrical wire is in good
condition.
Danger: Disconnect electricity before inspecting or servicing. Lock out all power and have another person
present. Always lock off all power and check with voltage meter before servicing. Failure to do so may cause
serious injury or death.

8
Safety
Safety Decal Locations
Safety decals and shields are mounted whenever possible at factory. Please check that all decals are in place
according to these drawings and in good legible condition. To order replacement decals or shields (NO
CHARGE) contact your dealer or Sioux Steel Company, 196 ½ E. 6
th
St., Sioux Falls, SD 57101-1265. Please
specify serial number.
Important! The following safety decals should be mounted on your equipment as shown below. If suggested
locations are not clearly visible, place safety decals in a more suitable area. Never cover up any existing safety
decals.
Make sure location area for decal is free from grease, oil, and dirt. Remove backing from decal and place in
proper position.
1. Warning- 165232
2. Danger- 169910
(Safe Operation Decal)
(Service Door Decal)
1
2

9
Fan Selection
Determine the Right Size Fan for Your Bin Size First
Warning! Determining the correct size fan for the size of the bin, type of grain and needs, is the key to
successful drying. Responsibility for the Grain Condition is Yours!
Warning! Incorrect fan size will cause your EQM Controls to not preform to your expectations. Oversized fans
for a bin will cause as much damage as undersize.
Note: Provide one square foot roof opening per thousand cfm fan capacity.
Site Prep Installation
Danger: Improper installation, operation, or maintenance can create potential danger. Read all
instructions carefully, and obey all cautions and warnings. Failure to do so could result in serious bodily
injury or property damage.
Shipping, Receiving, and Inspection
Review model number, confirming this is the model you ordered. Contact your dealer immediately if otherwise. =
Inspect unit for damage, noting any found on freight bill.
Preparing Site For Installation
Warning! Be sure to review previous pages on warnings. Installation should be performed only by a qualified
dealer, who is experienced and familiar with grain drying equipment, and with local codes, laws, and ordinances
regulation gas and electrical installations. Improper installation could result in serious bodily injury or property
damage.

10
Installation
1. Mount Control Box Mount (224319) to
bottom of Control Box as shown below
utilizing ¼”x 1/2” Hex Bolts (154002)
and ¼” Lock Washers (154060).
a. If mounting to a Centrifugal Fan,
mount Cent Box Mounts (224414)
as shown below utilizing ¼” x ¾”
Hex Bolts (154003), ¼” Washer
(13368), and ¼” Nylock Nut (157388).
2. Install Temperature and Relative Humidity Sensor inside control box (sensor will be found inside box).
Sensor will need to be inserted in small hole found in bottom of box. The Sensor Filter, found at end of
sensor, must be removed prior in insertion and then re-attached. Mount sensor to bottom of box using the
three holes and screw provided.
Remove Sensor Filter Inset Sensor & Reattach Filter Mount Sensor
3. Position Control Box Assembly according to model of fan (Centrifugal or Triumph)
a. Centrifugal Fan Option
i. Position Control Box Assembly as shown and mark location of end of sensor on scroll of
fan housing. Drill 7/8” hole into scroll of housing for sensor. Control Box Assembly will
now be able to mount to top of fan.

11
Installation
ii. Position Control Box Assembly on
top of fan as shown and mount to
top of fan housing utilizing ¼” x
1.25” Drill Screws (157630).
b. Triumph Fan Option
i. Drill (4) 9/32” holes and
7/8” hole on top of fan
where indicated by dimples.
ii. Position Control Box Assembly
on top of fan as shown aligning
mounting holes of control box
base with 9/32” holes drilled
previously. Insert sensor in 7/8”
hole. Secure control box to fan
housing using (4x) 5/16” x ¾”
Self-Forming Screws.

12
Installation
4. Seal Temperature and Relative Humidity Sensor holes with silicone caulk.
5. If the optional Headspace Temperature/Relative Humidity Sensor was provided, install at this time.
a. Sensor will be mounted to the bin roof above where grain is present. To install, this requires
drilling a 7/8” hole for the probe and using 3 small self-drilling sheet metal screws (customer
supplied) to mount to roof. Seal hole in roof with Silicone Caulk.
b. Sensor will need to be wired into heater control box using 3 conductor 18awg shielded wire and
any necessary conduit and fitting (customer supplied). Note: ½” knock out plugged hole in
bottom of control box for Headspace Sensor. See Electrical Schematic on how to connect
Sensor to EQM Board in control box.
6. Connect incoming 120vac power to EQM control power supply according to electrical schematic (page
28). Customer to supply incoming wire and any necessary conduit and fittings.
Note: Control Box must be interlocked to fan starter box or VFD.
7. For operating instructions on how to operate go to pages 13-26sa.

13
EQM Control
EQM Conditioning Principles
1. Shelf Life
Conditioning starts with storage and the desire to keep grain as long as possible without spoilage. Shelf life is
determined by grain moisture and storage temperature. This has been well documented by university research and
verified by field results.
13% 14% 15% 16% 17% 18% 19%
35 4549 2323 1140 566 315 213 165
40 3504 1789 878 436 242 164 127
50 1981 1012 496 246 137 93 72
60 1075 549 269 134 74 50 39
70 619 316 155 77 43 29 22
80 443 226 111 55 31 21 16
90 382 195 96 47 26 18 14
100 266 136 67 33 18 12 10
Temp Moisture Content 13% to 19%
Shelf life of shelled corn based on USDA research at Iowa
State University (0.5% dry matter decomposition
Moisture content
•Between 13% and 16% storage moistures, a 1% decrease in moisture roughly doubles the shelf life
Temperature
•Between 35F and 65F storage temperature, every 10F decrease roughly improves shelf life by 1.8X
Obviously the best combination is cold and dry. However over-dried grain loses money. Since there a possibility
of surface moisture with drying, aeration, and changing ambient conditions it is risky to freeze the grain as
clumping and sticking to the bin walls can occur.
2. Temperature and Humidity Principles
Temperature affects the ability of air to carry water. As the temperature rises, it can hold more water. When the
temperature drops, it can start condensing. The maximum amount air can hold at a given temperature is said to be
100% Relative Humidity, so if air is carrying half of the maximum amount it would be 50% Relative Humidity.
When water is turned to vapor it takes energy away from the surface of what it is leaving. This is just like when
people sweat.

14
EQM Control
EQM Conditioning Principles
These principles are important to understand because it affects how grain is dried, the Drying Front, and
Equilibrium Moisture (EQM).
When water is turned to vapor it takes energy away from the surface of what it is leaving. This is just like when
people sweat.
These principles are important to understand because it affects how grain is dried, the Drying Front, and
Equilibrium Moisture (EQM).
3. Temperature and Humidity Principles
Temperature affects the ability of air to carry water. As the temperature rises, it can hold more water. When the
temperature drops, it can start condensing. The maximum amount air can hold at a given temperature is said to be
100% Relative Humidity, so if air is carrying half of the maximum amount it would be 50% Relative Humidity.
When water is turned to vapor it takes energy away from the surface of what it is leaving. This is just like when
people sweat.
These principles are important to understand because it affects how grain is dried, the Drying Front, and
Equilibrium Moisture (EQM).
4. Equilibrium moisture
Equilibrium Moisture is a pressure balance between the water vapor in the air and the water in the grain.
EQM is the temperature and humidity combination needed to bring or keep grain at a specific moisture.
Aeration with Target EQM air will drive grain to that moisture.
If ambient air is too wet, a small amount of heat can usually bring it to the Target EQM.
If ambient air is too dry, cooling would be required to bring it to the Target EQM.
Temperature and Relative Humidity of the air determine the pressure of the water in the air trying to push water
into the grain.
Grain type and its moisture content determine the available pressure from the water in the grain to push against
the air.

15
EQM Control
EQM Conditioning Principles
The pressure difference drives moisture either into the air or into the kernel:
•When the pressure in the air is greater, the grain gets wetter
•When the pressure in the air is less, the grain gets drier
•When the pressures are the same, it’s called EQM
5. Airflow and EQM
When aeration occurs and water is being removed from the grain, the rate is determined by the airflow and the
temperature and relative humidity of the air.
•The temperature determines how much water each pound of air can carry.
•The relative humidity dictates how much water each pound of air is already carrying and how much more
water is left to be absorbed into that same air.
Relative humidity and temp create vapor pressure in the air
Moisture content and temp create vapor pressure from the kernel

16
EQM Control
EQM Conditioning Principles
•The airflow (cfm) is simply how many pounds of air are available to remove water. More airflow means
that more pounds of air can carry away more pounds of water per minute.
6. Typical EQM
Since the EQM of the air is critical to whether we are removing or adding moisture of the grain, we need to know
when the air is right to accomplish the desired Target EQM for the grain. This is done with the temperature and
relative humidity sensors. Conventional aeration controllers also do this to determine when the air conditions are
in the zone for aeration. However, conventional controllers cannot change or extend those conditions without the
addition of heat.
Outside air EQM changes during each day. EQM usually:
•increases after sundown and temperatures drop
•decreases when the air is warmed by the sun
•is at its lowest during late afternoon
The above screen shows the temperature (red), relative humidity (turquoise), and EQM (black) over two days
during harvest. There is very little time that the EQM is in a favorable zone for aeration.
Outside air EQM also changes seasonally. EQM usually:
•is rising at harvest time
•is falling in the spring
•Is highest during the winter
•Is lowest during the summer

17
EQM Control
EQM Conditioning Principles
7. Adding heat
Adding a small amount of heat has a dramatic effect on EQM. For example: a typical fall day with 45F
temperature and 75% relative humidity produces an EQM of 17% for corn. Just a 3F temperature rise drops the
relative humidity to 67% and the EQM to 15.3%.
This means that with a very small addition of heat:
•Target EQMs can be easily attained
•Much greater time for aeration can be available
8. Drying Front
Whenever drying occurs there is evaporative cooling which results in condensation and surface moisture on the
cooler grain. Mold can form if air is stagnant and moisture is present. For this reason, aeration is generally not
interrupted even when weather conditions are unfavorable. A small amount of heat can often make those ambient
conditions tolerable and extend the amount of time that Target EQM air can be used. Large amounts of heat that
are typical with conventional heaters result in a more pronounced drying front. More condensation occurs at the
front, in the bin headspace, and on the bin walls. This is particularly important to prevent clumping, freezing, and
sticking to the walls.

18
EQM Control
EQM Conditioning Principles
9. Grain type variances
Grain types absorb moisture differently. The same air that would produce 15% moisture for corn would produce
13% for wheat or soybeans. Also the amount of EQM air required to remove moisture in corn is much less than
what is required to add the same amount of moisture. In other words, it is much harder to add moisture than to
remove moisture for corn. The EQM curves and algorithms for each grain type are different.

19
EQM Control
Components/Functions
1. Power Supply / Breaker
The Power Supply / Breaker is located on a din rail in the control box and is the source for 110VAC and 24VDC
to the EQM Board. The 110VAC will not receive power if the High Limit Thermostat is tripped or if the fan is not
running (Heater power must be interlocked fan control).
2. EQM Board
The EQM board is command central for the EQM system. It is powered by 24VDC from the Power Supply /
Breaker.
The 24VDC circuit on the EQM board provides power to:
•The Temperature and Relative Humidity Sensors
•All the low voltage DC power to the processor circuits
There is also a Modbus connection for VFD control.
The EQM board is also the wireless connection to the user’s phone or tablet through WiFi.
The EQM board is also the storage location for all data taken into the system. These can be downloaded
wirelessly.
3. Temperature and Relative Humidity Sensors
The primary temperature and relative humidity sensor is located in the control box with the sensing tip exposed to
the heated air in the fan itself. This sensor is the basis for the EQM information and is very critical to successful
operation.
An optional additional identical sensor should be located in the bin headspace to monitor the air coming off the
grain before it exits the bin. This sensor is used to determine the amount of water removed and when drying is
complete.

20
EQM Control
Setup and Operation
1. Connecting to your mobile device
a. EQM Board
The EQM board is equipped with a WiFi dongle that provides access to the EQM computing and database with a
mobile device or laptop computer. When power is present on the EQM board the WiFi boots up (up to 2 min) and
is then accessible.
b. Mobile Device or Laptop connecting
Your mobile device or laptop has a settings menu that will show the available WiFi connections. There will be a
connection labeled EQMT followed by a number. This will correspond to the number shown on the label on the
EQM board.
•Select this WiFi connection.
•Enter the password “vfdautomation” (don’t use “”)
•Go to your browser and type in “192.168.8.1” (don’t use “”)
•The dashboard should appear