AGI NECO 04HC24NGV Guide

040714 R01 1
Axial Fan Heater
Assembly, Operations, and Parts Manual
Part Number: 040714 R01
Revised: 2017-12-22
INSTALLATION AND WIRING MUST
BE IN ACCORDANCE WITH CEC,
NEC, AND LOCAL ELECTRICAL
CODES
Read this manual before using product. Failure to
follow instructions and safety precautions can
result in serious injury, death, or property
damage. Keep manual for future reference.

2
Nebraska Engineering Company (NECO) Overview ---
Since 1959, NECO equipment has been proudly designed, manufactured, and supported for
customers here in the USA and around the world. With proper operation and maintenance,
the equipment will provide years of safe and dependable service. NECO is continually testing
and improving our products in order to provide you with the safest, most ef cient, and most
economical grain handling & grain conditioning equipment available. We welcome your questions
or comments and look forward to a continued relationship, ultimately saving you valuable time and
reducing your workload.
About this manual ---
• This manual is provided to help ensure the safety of the equipment
operator, as well as others who come into contact with the equipment.
• Keep a copy of this manual in a safe place for future reference.
• Failure to read, understand, and follow the instructions within
this manual constitute a misuse of the equipment and can affect
personnel safety and the product warranty.
• Additional copies can be viewed or printed from the NECO
website www.necousa.com or contact your local dealer for
assistance.
• Language translations of this manual are made as accurately as
possible. If translation differences do occur, the English text will
prevail.
READ
and
UNDERSTAND
Watch for this symbol - it means DANGER or CAUTION !!
Be alert to the possibility of serious injury or death.
• This symbol is used to call your attention to
instructions concerning personal safety.
• It is your responsibility as an owner, operator,
or supervisor to know what hazards exist and
to make this information known to all persons
working with the equipment or who are in the
area.
Become Alert !!
Product Changes & Improvements ---
• NECO reserves the right to make changes or improvements to its products
without incurring any obligation with respect to previously manufactured products.

3
For a period of one(1) year after shipment of goods by the Buyer to the Buyer’s
customer, NECO will supply, free of charge, FOB per NECO’s factory located
in Omaha, Nebraska, replacement parts for any parts that NECO identifi es to be
defective due to workmanship or material.
• This limited warranty does not extend to parts that wear due to normal operation and need to be
replaced periodically.
• Goods not manufactured by NECO carry only their manufacturer’s warranty.
• This undertaking is in lieu of all other warranties, expressed or implied, including merchantability
and  tness for a particular purpose.
• You must obtain a “Return Authority” form from NECO prior to returning any defective goods.
Those defective goods must be returned, freight-prepaid, to the NECO factory in Omaha,
Nebraska. See the back cover of this manual for complete address information.
• NECO reserves the right to make changes or improvements to products and goods without
incurring any obligation with respect to previously manufactured products.
• Failure to follow the instructions contained in this manual, as well as the existence of any of the
conditions listed below, will cause this Limited Warranty to be null and void:
1. Improper assembly.
2. Improper installation, including power and wiring.
3. Unauthorized alteration of the product or components therein.
4. Operation of the unit when repairs are needed.
5. Use of unauthorized parts.
6. Operation by children or uninstructed personnel.
7. Processing of materials that are abrasive, that do not  ow freely,
or that are otherwise unsuited for processing in farm equipment.
8. Misuse of the equipment or any of its components.
9. Damage due to negligence, abuse, or accidents.
LIMITATION OF LIABILITY
• Buyer agrees that in no event shall NECO have liability for direct damages in excess of the
contract price of the goods for which the claim is made.
• Buyer further agrees that in no event shall NECO have liability for loss of use, loss of pro ts, or
for any indirect, incidental, or consequential damages on any claim of any kind.
***** LIMITED WARRANTY *****

4
Table of Contents
GENERAL STATEMENTS................................................................................................................ 2
WARRANTY ..................................................................................................................................... 3
SAFETY............................................................................................................................................ 5
OPERATOR QUALIFICATIONS ............................................................................................ 5
OPERATING PROCEDURES ............................................................................................... 5
POWER LOCK OUT.............................................................................................................. 6
MACHINE INSPECTION ....................................................................................................... 6
WORK AREA SAFETY .......................................................................................................... 6
AVOID STRUCTURAL DAMAGE .......................................................................................... 7
AVOID FIRE, EXPLOSION, AND ASPHYXIATION HAZARDS ............................................. 7
INSTALLATION DATA AND MOUNTING PAD ................................................................................. 8
INSTALLATION...................................................................................................................... 9
GROUNDING ...................................................................................................................... 10
FUEL SUPPLY..................................................................................................................... 10
PROPANE ...................................................................................................................... 10
NATURAL GAS .............................................................................................................. 13
COMPONENT IDENTIFICATION AND FUNCTION....................................................................... 14
SETTING THE DRYING TEMPERATURE ..................................................................................... 15
PRE-START CHECK...................................................................................................................... 16
INITIAL START-UP USING PROPANE .......................................................................................... 16
HEATER OPERATIONS................................................................................................................. 16
RECOMMENDED DRYING TEMPERATURES ............................................................................. 19
WIRING DIAGRAM NOTICE.......................................................................................................... 20
DRYING PRECAUTIONS............................................................................................................... 21
JOHNSON CONTROLS SERIES V50 FOR SELF-OPERATED MODULATING VALVES............. 22
TROUBLESHOOTING GUIDE....................................................................................................... 24
MAINTENANCE ............................................................................................................................. 28
REPLACEMENT PARTS................................................................................................................ 29

5
OPERATOR QUALIFICATIONS
Operation of this farm equipment shall be limited to competent and experienced
persons. In addition, anyone who will operate or work around power equipment
must use good common sense. In order to be qualied, operator must also know
and meet all other requirements, such as:
1. Some regulations specify that no one under the age of 16 may operate power machin-
ery. This includes farm equipment, It is your responsiblity to know what these regula-
tions are in your own area or situation.
2. Current OSHA regulations state in part: "At the time of intial assignment and at least
annually thereafter, the employer shall instruct every employee in the safe operation
and servicing of all equipment with which the employee is, or will be involved."*
3. Unqualied persons are to stay out of the work area. The "Work Area" is dened as the
area surrounding the grain handling equipment.
4. A person who has not read and understood all operation and safety instructions is NOT
qualied to operate the machine.
* Federal Occupational Safety & Health Standards for Agriculture Subpart D,
Section 1928.57 (a) (6).
OPERATING PROCEDURES
During the operation of your farm equipment, one person shall be designated to monitor the
machinery. It is also good practice for all qualied persons involved to visually inspect the
equipment periodically during any actual operation. You should be alert for any unusual vi-
brations, noises, and loosening of any fasteners.
1. Observe work area restrictions.
2. Keep all safety shields and devices in place.
3. Make certain everyone is safely clear before operating or
moving farm equipment.
4. Keep hands, feet, and loose clothing away from moving parts.
5. Always disconnect power before servicing equipment!
CAUTION:
NOTE: Foreign customers are responsible for knowing and applying their local safety regulations.
SAFETY

6
POWER LOCK OUT
It is essential to inspect your fan and heater before turning on the power. Know how to shut
down the fan anf heater power in an emergency! Prior to any servicing or adjusting of your
equipment, make certain to shut down the power and lock it out.
1. Electric motors and controls shall be installed by a qualied electrician.
Installation must meet standards set by the National Electrical Code and all local and state
codes.
2. Always disconnect and lock out power before servicing the fan and heater.
3. Reset and motor starting controls must be located so that the operator has a full view of the
entire operation. Always keep children away from unit!
4. Make certain that all fan guards are reinstalled after servicing.
A main power disconnect switch capable of being locked only in the OFF position shall be in-
stalled. This shall be locked out whenever the equipment is being serviced.
After delivery of your new fan/heater and/or completion of assembly and before each use, in-
spection of the equipment is mandatory. This inspection should include but not be limited to:
1. Check to see that all guards listed in the assembly instructions are secured
in place and are functional.
2. Check that all fasteners are tight.
3. Before starting fan, be sure that fan interior and inlet is clear of any debris.
4. Make certain that impeller rotates freely.
5. Open roof hatches before use.
6. Inspect all electrical and gas connections. Check for leaks with soapy water.
7. Are all safety decals clean and readable?
8. Before starting heater read start-up procedures.
MACHINE INSPECTION
People not involved in the operation should not be allowed into the work area.
It shall be the duty of all operators to see that children and/or any other unqualied per-
sons stay out of the work area. Trespassing into the work area by anyone not involved in the
actual operation, or trespassing into a hazardous area by anyone, shall result in an immediate
shut down by the operator.
It is highly recommended to wear hearing protection when standing near operating fan.
Prior to start up and during operation, it shall be the responsibility of all operators to see
that the work area is clear. It must be clean and free of any debris and misplaced tools which
could cause accidental tripping and/or falling.
WORK AREA SAFETY

7
FAILURE TO HEED THESE INSTRUCTIONS
CAN RESULT IN PERSONAL INJURY OR DEATH!
BE EXTREMELY CAREFUL OF THE HIGH VOLTAGE
PRODUCED BY THE IGNITION UNIT.
NOTE: IF YOU EXPERIENCE PROBLEMS WITH YOUR HEATER, CONTACT
YOUR DEALER FIRST. IF THEY ARE UNABLE TO HELP, CALL THE SERVICE MANAGER AT
NECO. THE PHONE NUMBER IS 1-800-367-6208 OR [phone].
AVOID FIRE, EXPLOSION, AND ASPHYXIATION HAZARDS
NECO Heaters are designed for drying crop output in grain bins. They provide heated air via
grain bin plenums (found underneath full-oor bins) or via in-oor ductwork.
Consult the NECO factory before attempting to use heaters for EZEE-DRY applications.
Never use NECO heaters to heat buildings, sheds, barns, etc. because of hazards posed by
the ame and by the output of carbon monoxide.
Never install or use NECO heaters where a high concentration of grain dust or ammable
liquids or vapors exists because explosions could result. A common grain bin lled with grain
such as shelled corn, beans, or wheat is not considered an explosive (volitile) environment. A
metal or concrete silo lled with nely milled grain dust, however, does consitute an explosive
environment.
Never allow anyone to enter the grain bin when a fan and heater is operating! Gasses given off
by the burner (including carbon monoxide and carbon dioxide) could cause death.
When installing the heater make sure that the plenum area is clean of any ammable debris
especially within 10 ft. of the heater transition entrance. At the end of each season clean the
transition, heater entrance, and plenum. Good housekeeping is essential to prevent bin res.
Before loading the bin with grain, make certain that the plenum oor or ductwork is not dam-
aged or plugged. Also, check the operation of the aeration fan to make certain that the roof
vents are unobstructed.
Avoid Structural Damage to your Bin
Ensure that all roof vents are open and unobstructed.
Ensure adequate ventilation. NECO recommends a minimum of 1 square foot (929
cm2) of vent area per every 1000 cfm (21 m3/min) fan air input.
Make certain that all fans are installed for positive pressure aeration (push system).
Roof exhausters should be interlocked with aeration fans so that roof exhausters can
run only when the aeration fans are running.
Never operate your bin aeration system when icing of the roof vent is possible. Roof
vent icing can occur when the ambient air temperature is below 35° F (2° C) and
the relative humidity of the air is 90% or greater. Check with your local weather
bureau.
AVOID STRUCTURAL DAMAGE

8
Fan
Heater
HEATER
SINGLE HEATING UNIT
TWO HEATING UNITS
BURNER CONTROL
FOR SECOND
(THERMOSTAT/
Unload System
HUMIDISTAT)
Bin
Heater
Fan
Unloading
System
Bin
1 1/2 SHEETS MIN.
INSTALLATION DATA
and MOUNTING PAD
When installing your heater unit, plan the sys-
tem such that proper consideration is given to:
1. For even heat distribution. Install the heater
inline with the unloading auger (see Figure 1).
For more than one heating unit, install the
second heater a minimum of 1-1/2 bin sheets
apart. The thermostat or other controlling de-
vice should be installed between the two heat-
ers. All heaters are equipped with a terminal
strip where the customer supplied ther-
mostat, humidistat, or combination unit for
controlling the heater output must be wired.
A control is not required on units equipped
with a modulating valve. To install a modulat-
ing valve cut a 1¼" hole 3 ' from the side of
the transition below the drying oor. Attach the
bracket on the probe over the hole with screws
shown in Figure 2. When not using a control
device with a modulating valve heater, the two
terminals on the terminal strip in the heater
control box normally used for the control de-
vice must be jumped together to operate. For
safety purposes though, a burner control
device is ALWAYS recommended.
2. Minimize airow resistance by running oor-
ing at right angles to the unload auger. Floor
supports should be parallel to the unload auger.
IMPORTANT
3.During initial operation, with grain in bin, drill 6
to 8 evenly spaced holes in lower bin sheet un-
der drying oor around the bin. Check for even
temperature making necessary adjustments as
required. This will allow for uniform drying and
may prevent a potential re hazard.
Figure. 1 Heater Positioning
NOTE: When using two or more fans on the
same bin, be sure to provide devices that will
prevent reverse rotation of fans that are not run-
ning. This is to prevent damage to the fan mo-
tors. Examples of devices are: a) Simultaneous
starting, b) Sequential starting (at 30 second
intervals), c) Cover plates, and d) Shutters.
Figure. 2 Modulating Valve Installation
Keep under
bin oor.
DUEL HEATING UNIT
Spacing from 4' to within
45° of each other.
Modulating
Probe
Duel Burner
Control
(Thermostat/
Humidistat)
Unless otherwise noted [ ] indicates length
measurement in millimeters.
NECO highly recommends that you install
at least two or three thermometers equally
spaced along the circumference of the
grain bin plenum. Monitor the drying heat
to avoid excessive temperatures.

9
Figure 3.
INSTALLATION
AREA= 56 X 11 = 616 SQ IN.
[3974 sq. cm.]
TRANSITION DISCHARGE OPENING
FAN DISCHARGE
AREA = 616 SQ. IN.
[3974 sq. cm.]
4. Fan and add-on heater mounting plane is
the same as your grain bin.*
*On MFS corrugated grain bins with a rolled in
base angle, the fan and heater mounting needs
to be 1½" lower.
Place the fan and heater on a mounting pad
or hang them off the side of the grain bin with
cables. Hanging installations can prevent the
costs and maintenance issues associated
with poured concrete pads. NECO premium
axial fans and axial heaters 24" and greater
are equipped with cable attachment brackets
(located at the handles). Use at a minimum a
3/16" galvanized steel (or stainless steel) wire
rope with appropriate ttings. Make certain the
units are secured to prevent any wind-induced
sideways motion. Centrifugal fans and heaters
can also be hung by cables, but due to their
weight and size the installations usually require
angle brackets and heavier wire rope. Speak to
your dealer or local millwright before attempting
cable installations.
It's very important that the unit is securely
mounted. If you choose a poured concrete slab
to mount your fan and heater on, it is recom-
mended that the slab be approximately 6 inches
thick [152] and 12" [305] wider on each side of
the fan/heater.
TIP: In order to reduce the chances of frost
heave, the pad can be poured on top of several
metal or concrete pilings which extend lower
than average frost depth.
5. Make sure the bin transition discharge is of
an equal area to your fan outlet. (See Figure 3.)
1. Using the appropriate caulk (caulking rated
at 200°F) caulk the Fan/Heater anges. Con-
nect the fan to the heater using nuts, bolts etc.
Hand tighten these fasteners only.
Note: use the appropriate adapter plates to
connect Fans/Heaters and transitions. Do not
weld onto transitions! Welding will cause
distortions which could lead to vibrations
during operation.
2. Place fan and heater on mounting pad.
Make sure the units sit level.
Any bending of the units will twist
the housing and cause future
problems.
Note: Frost heave can cause Fan/Transition
distortion and even vibration.
3. Wrench tighten the fan mounting bolts/nuts,
followed by wrench tightening of the heater
mounting nuts/bolts.
Make sure heater/fan mountings
are secure. A loose fan mounting
will cause the fan to vibrate. Vi-
bration can cause excessive wear
on the fan motor bearings.
4. Wrench tighten all ange fasteners.

10
GROUNDING
Connect your fan/heater to a ground rod
that's no more than 8' [2.4 m] away. Connect
the ground rod to the fan control panel with a
minimum 6 AWG solid bare copper wire that's
copper-clad and measures 5/8”diameter x 8 ft.
long. Install the rod two feet from the fan/heater
and/or bin foundation, and in accordance with
local requirements. The ground rod-to-fan con-
nection provides additional safety in the event
of a short or lightning strike. It also provides the
necessary grounding for operation and long life
of control circuits in the fan and heater.
Contact an electrical parts supplier to purchase
ground rods and wires. ENCO recommends the
rod not be driven in to dry ground. Follow the
steps below to ensure proper rod installation.
1. Dig a ditch and ll it with 1-2 gallons [3.8-7.6
Liters] of water.
3. Push a rod through the water and into the
ground.
4. Jab the rod up & down allowing the water to
work its way down the hole thus promoting
a conductive bond with the surrounding soil.
Drive the rod completely down.
5. Connect one end of the ground wire to the
rod with an appropriate ground clamp.
6. Connect the other end to a ground lug con-
nector inside the fan control box. Ground
wires should have no splices or breaks.
Don't use insulated wire for grounding.
NECO recommends that previously installed
units be checked for proper grounding.
Figure 4.
Vapor Valve Liquid Valve
Tee
Tank
Oil and Contaminants
Liquid
To Vaporizer
FUEL SUPPLY
Gas suppliers will provide a tank, rst stage
regulator, and the connection to the dryer. He
should test the connections for leaks. Storage
tanks must be located at least 25 feet from all
structures, depending on local codes. Check
with your gas supplier for code specications.
Route the supply line in so line breakage from
moving machinery is least likely. Line sizing
charts have been included in this manual to
assist in selecting the proper size pipe for the
supply line. See charts on the next page.
Propane
The inside of the supply tank must be free of
all contaminants. Raise one end of the liquid
propane supply tank as shown in Figure 4.
DO NOT USE supply tanks for propane if
they've previously been used for anhydrous
ammonia. Anhydrous ammonia residue will
rapidly corrode the brass components. Fuel
contaminants can also cause sooting and lead
to ignition problems.
NOTE: WARRANTY IS VOID IF FUEL
SUPPLY CONTAINS ANYHYDROUS
AMMONIA OR OTHER CONTAMINENTS.