Axial Flow Fan

Axial Flow Fan
Owner's & Operator's Manual
Effective Date: Nov 13, 2013
Publication Number:
040713
Rev:
A
Welcome to the growing number of satisfied NECO customers
Since 1959, NECO equipment has been proudly designed, manufactured, and supported for
customers here in the USA and around the world. Occupational safety is one of NECO’s primary
concerns. 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 efficient, 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.
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.
Keep a copy of this manual in a safe place for future reference.
Additional copies can be accessed & printed from the NECO
website www.necousa.com or contact your local dealer for
assistance.
See the “HAVE QUESTIONS or NEED HELP” section and fill out
the required information for correct identification of the equipment
and efficient communication when needed.
Language translations of this manual are made as accurately as
possible.If there is a conflict or difference between the English version
and other translations of this manual, the English text will prevail.
READ
and
UNDERSTAND
ATTENTION -- Become Alert !!
•
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.
It means ATTENTION - Become Alert !!
Be alert to the possibility of serious injury or death.
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.
2
TABLE OF CONTENTS
***** LIMITED WARRANTY *****..................................................4
1. SAFETY........................................................................5
2. WARNING LABELS......................................................7
Warning Label Identification.......................................................7
Label Locations............................................................................9
3. EQUIPMENT OVERVIEW..........................................10
General Design Criteria.............................................................10
Installation Overview................................................................. 11
Electrical Overview....................................................................12
4. INSTALLATION..........................................................13
Determine Equipment Position.................................................13
Position & Cut Bin Opening......................................................14
Caulk and Secure Transition.....................................................14
Mounting Pad Style Installation................................................14
Hanging Style Installation..........................................................14
Power Hookup............................................................................15
Wiring Schematics.....................................................................18
5. OPERATION...............................................................22
Pre-Start Instructions.................................................................22
Normal Operation.......................................................................22
Fan Air Delivery..........................................................................23
6. MAINTENANCE..........................................................24
7. APPENDIX.................................................................25
Troubleshooting Section...........................................................25
Replacement Parts - 12" to 16" Fans........................................26
Replacement Parts - 18" to 28" Fans........................................27
3
***** LIMITED WARRANTY *****
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 identifies 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 fitness 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 flow 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 profits, or
for any indirect, incidental, or consequential damages on any claim of any kind.
4
1. SAFETY
OPERATOR QUALIFICATIONS
READ
and
UNDERSTAND
WORK AREA SAFETY
• Work Area is defined as the area
surrounding grain handling equipment.
• Make sure that no children or unauthorized
persons enter the work area.
• If anyone not involved in the actual
operation DOES enter the work area, the
operator on duty should immediately shut
down the equipment until all unauthorized
persons are safely out of the work area.
• Do not have loose clothing, long hair, etc.
that can be grabbed by rotating equipment.
• Prior to start-up and during operation, make
sure that the work area is clean and free of
any tools and debris. KEEP AREA CLEAN
WEAR PERSONAL
PROTECTIVE EQUIPMENT (PPE)
• •
•
•
Wear protective clothing.
Wear hand protection - leather, etc.
Wear safety glasses / ear plugs / etc.
Use fall protection when climbing.
ANSI and NFPA STANDARDS
• Install all equipment in compliance
with ANSI and NFPA Standards.
• Anyone who has not read or does not
completely understand all operating and
safety instructions contained within this
manual is not qualified to operate the
equipment.
• Only competent and experienced persons
should operate farm equipment. Anyone
operating or working around power
equipment must understand and meet all
legal and contractual requirements.
• The owner / operator must know the
regulations in your own area. For example,
some regulations specify that no one under
the age of 16 may operate power machinery
including farmstead equipment.
• Current OSHA regulations state in part,
“At the time of initial 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. **
• Know and use proper LOCK OUT / TAG
OUT procedures and know the emergency
shut-off locations of any and all utilities
connected to the equipment.
OPERATING PROCEDURES
• Safely follow all operating procedures
outlined within this manual.
• Prior to startup, make sure that all safety
shields and warning decals are in place.
• NEVER leave equipment running without a
qualified operator present.
• Inspect the equipment periodically and be
alert for unusual noises or vibrations.
** Federal Occupational Safety & Health Standards for Agriculture Subpart D, Section 1928.57 (a)(6).
5
EQUIPMENT INSPECTION
• SHUT OFF, LOCK OUT, & TAG OUT all power sources to the equipment prior to any
inspection, adjustment, service, or maintenance.
• Inspect the equipment after assembly, before each use, and at the end of the season.
DRIVES AND LOCKOUTS
• Make sure the power disconnect switch can be locked in the OFF position. This
disconnect switch must be locked whenever work is being performed on the equipment.
• Inspect all power drives before adding power. Chains, belts, etc. should have proper
tension or be adjusted prior to running.
• Electric motors and controls must be installed by a qualified electrician. They must meet
the standards set by the NFPA Std 70 of the National Electrical Code and all local and
state codes.
• Disconnect power before resetting motor overloads.
BIN SAFETY
• Never enter a bin without being monitored by another person.
• Do not enter the grain bin unless all power to equipment has been SHUT OFF, LOCKED
OUT & TAGGED OUT.
• Use a safety harness and life line when inside the bin.
• Avoid walking on grain near the grain outlets. Flowing grain can trap and suffocate.
• Do not enter the bin if the grain has not flowed out of the bin normally. Moisture in the bin
can cause grain to form steep, unstable inclines or bridges.
AVOID STRUCTURAL DAMAGE
• Prior to fan operation, 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.
NOTE: If you experience problems with your equipment, call your dealer first for
assistance. If this does not solve the problem, contact NECO, using the information
located on the back page of this manual.
6
2. WARNING LABELS
Warning Label Overview
• Occupational safety is one of NECO’s primary concerns. Warning labels that conform to
industry standards are provided to identify potential safety hazards that could cause harm
and to INCREASE YOUR AWARENESS OF THE HAZARD.
• It is the Owners & Operators responsibility to ensure that all instructions identified
by warning labels are followed - including any suggested use of personal protective
equipment (PPE).
• This following warning label information identifies:
1. Potential hazards that are identified by a warning label.
2. Warning label header or identification.
3. The NECO part number for that warning label.
4. The location of that warning label.
5. What that warning label looks like - note that label pictorials are not shown full size.
• If the warning labels are missing or become unreadable in any way, use the following
information to determine the required part number and contact NECO Customer Service
at 402-453-6912 or toll free at 800-367-6208 for replacements.
• Replacement Warning Labels will be sent to you FREE OF CHARGE.
• Surfaces must be free of oils, dirt and moisture before applying replacement warning
labels.
Warning Label Identification
WARNING LABEL HEADER
NECO
PART
#
QTY
A
ROTATION ARROW
035643
1
ON FAN HOUSING
B
FAN CAUTION
036724
1
ON FAN HOUSING
C
EXHAUST AIR
F018050
1
ON FAN HOUSING
D
AIR FLOW
F048351
1
ON FAN HOUSING
LABEL
ID
LOCATION
IN ADDITION, THE FOLLOWING WARNING LABELS ARE ON ALL 24" & 28" FANS:
E
WARNING - HIGH VOLTAGE
035691
1
ON CONTROL BOX LID (OUTSIDE)
F
DANGER - HIGH VOLTAGE
036725
1
ON CONTROL BOX LID (INSIDE)
G
NECO LOGO
036775
2
BOTH LOWER SIDES OF THE HOUSING
IN ADDITION, THE FOLLOWING WARNING LABEL IS ON SINGLE-PHASE 24" & 28" FANS:
H
FAN CAPACITOR CAUTION
043127
1
7
ON FRONT OF CONTROL BOX
LABEL ID'S "A" THRU "D" -- INCLUDED ON ALL AXIAL FAN MODELS:
Label ID "A"
Label ID "C"
Label ID "B"
Label ID "D"
LABEL ID'S "E" THRU "H" -- INCLUDED ON 24" & 28" FAN MODELS:
Label ID "E"
Label ID "F"
Label ID "G"
8
LABEL ID "H" -- INCLUDED ON SINGLE PHASE 24" & 28" FAN MODELS:
Label ID "H"
Label Locations
"F"
FAN
IDENTIFICATION
LABEL
CONTROL BOX INNER LID:
"E"
MANUAL
SCHEMATIC
"A"
"H"
"D"
SERIAL # TAG
EXAMPLE SHOWN:
24" AXIAL FAN WITH OPTIONAL
CONTROL BOX & POWERED BY
SINGLE-PHASE MOTOR.
"B"
"C"
"G"
BOTH SIDES
9
3. EQUIPMENT OVERVIEW
General Design Criteria
Figure 1 shows component layout options for a typical in-bin drying installation:
Power
Roof Exhauster
(optional)
Roof Vents
(optional)
Static Pressure
Gauge (optional)
Transition
This Axial Fan is
shown hanging
from the bin.
Transitions should fit under the
floor and be unobstructed for
maximum airflow.
Shutters
(optional)
Downstream Heater
(optional)
Note: A quarter of the bin has been cut away to show airflow and perforated
floors. Perforated floors are shown incomplete. Only fan and heater-related
in-bin drying equipment is shown. Stirring, loading, and unloading systems
are not shown. Perforated floors are shown with galvanized floor supports
only as a reference.
Figure 1 - Typical In-Bin Drying Components
10
Axial Fan
MODEL # KEY :
Example Model #: 04A C 810 3
04A – Axial Fan
MODEL #
F – Without Controls
C – With Controls
208 – 12” Diameter, 0.75hp
410 – 14” Diameter, 1.0hp
450 – 24” Diameter, 5-7hp
475 – 24” Diameter, 7.5-10hp
615 – 16” Diameter, 1.5hp
830 – 18” Diameter, 3hp
810 – 28” Diameter, 10-15hp
MODEL # & SERIAL #
METAL ID TAG
1 – Single-Phase
3 – Three-Phase (230V with Controls)
A – Three-Phase with 460V Controls
SERIAL #
Installation Overview
As shipped, the fan is basically a complete and ready to operate unit. The following
installation functions will need to be completed :
TRANSITIONING
The fan must be attached to the bin wall beneath the drying floor through a transition and
entrance collar arrangement. These components are available from NECO although other
designs can be used successfully. Be sure that minimum air leakage is present in the
transitioning arrangement to preserve airflow to the grain bed. Transitioning should provide
the same OR GREATER cross sectional flow area as the fan outlet to prevent excessive
static pressure buildup.
MOUNTING NEEDS TO BE SECURE, LEVEL, AND VIBRATION FREE
Either a mounting pad installation or hanging installation is possible for this unit - either
way, ensure that the entire system is mounted level. Vibration can cause various types of
equipment failure, such as noise, premature fan motor bearing wear, and impeller damage.
11
The following information outlines the two typical methods of mounting -MOUNTING PAD INSTALLATION
It is very important that your fan be mounted on a solid surface - typically, a poured
concrete slab is one of the most common methods of installation. All leveling legs must be
firmly on the pad and adjusted such that the system is secure and level.
HANGING INSTALLATION
Fans can also be hung off the side of the grain bin with cables. If properly done, hanging
installations can avoid pads and the cost and problems associated with them. Make certain
the units are secured to prevent sideways motion due to wind, etc.
Electrical Overview
WARNING
All electrical service must be installed by a certified electrician per the "National
Electrical Code" and local codes where applicable.
The customer is responsible for supplying materials and labor to install:
1. A properly-sized lock-out type disconnect box with fuse or breaker protection for EACH
fan & add-on heater.
2. Properly-sized service line.
3. Proper grounding protection.
4. (OPTIONAL) If a heater is used in conjunction with the fan, the heater MUST be wired
into the fan control box so that the interlock will prevent the heater from operating without
the fan ON. The heater must NEVER be wired into a separate power feed !!
12
4. INSTALLATION
Determine Equipment Position
Figure 2 shows dimensions of an Axial Fan, based on the fan tube diameter.
Optional control box dimensions are listed with an asterisk (*)
* Control Box Dimensions
N/A = Not Applicable
Figure 2 - Axial Fan Dimensions
When installing the fan, consider:
1. Elevation - Fan and heater mounting plane is the same as your grain bin.
Note: On MFS 4" corrugated grain bin with a rolled in base angle, the fan and heater
mounting plane needs to be 1-1/2" lower.
2. Horizontal placement - Attaching the transition first will assist with proper location
of the drying units and mounting pad.
13
Position & Cut Bin Opening
• At the required position(s) and using the dimensions provided, cut the transition opening
and any required mounting holes.
Caulk and Secure Transition
• Place the transition over the cutout area and align the mounting holes.
• Mark around the perimeter of the flange and re-position the transition to the side so
that caulking can be applied throughout the area between the cutout and the marked
perimeter.
• Replace the transition into final position and secure.
• Remove any excess caulk.
Mounting Pad Style Installation
• The surface dimension of the concrete slab should be about one foot wider all around
than the mounting flanges and the slab should be about 6 inches thick.
• 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 the average frost depth.
• Make sure the fan is mounted level - any binding will twist the housings and cause
future problems.
Hanging Style Installation
• NECO premium axial fans and axial heaters 24" and greater are equipped with cable
attachments - located on the lower side braces (See below).
• Use a minimum 3/16" galvanized or stainless wire rope with the proper fittings.
• Make certain the units are installed to prevent any sideways motion, such as caused by
wind.
NOTE: Do NOT allow the fan to be
hung so that the axial housing tube
is cantilevered. This will cause fan
distortion and vibration.
CORRECT
HANGING
CONNECTION
Figure 3 - DO NOT "cantilever" the fan / heater
14
Power Hookup
• The following tables for electrical service to your fan and add-on heaters are presented
for reference only. The transformer sizes listed are the recommended minimum
requirements of the unit. The fuse requirements are sized for approximately 25%
overload capacity. Install these for your protection.
Recommended Electrical Service
230 VOLT - SINGLE PHASE MOTOR
Single phase installation must be three-wire with grounded neutral.
Motor hp
Range
rpm
1/3 - 1/2
1/2 - 3/4
1
1-1/2
3-4
5-7
7-9
10 -13
3450
3450
3450
3450
3450
3450
3450
3450
Table 1
Maximum Transformer
Fusetron
Amperage KVA Size Time-Delay Fuse
1.5
2
2
3
5
10
15
15
5
7
8
10
18
35
44
55
6.25
10
10
15
25
50
60
70
230 Volt - Single Phase Motor
230 or 460 VOLT - THREE PHASE MOTOR
Three-phase installation must be 4-wire with grounded neutral.
Motor hp
Range
rpm
1/3 - 1/2
1/2 - 3/4
1
1-1/2
3-4
5-7
7-9
10 -13
3450
3450
3450
3450
3450
3450
3450
3450
Table 2
Maximum Transformer
Fusetron
Amperage KVA Size Time-Delay Fuse
230 460 230 460
230 460
2
3
4
6
10
18
24
36
5
9
12
18
.5
.75
1.0
1.5
3.0
5.0
7.5
7.5
1.5
3.0
3.0
5.0
2.5
4
5
8
15
25
30
40
6.25
15
15
20
230 Volt or 460 Volt - Three Phase Motor
15
MIN Wire Size - Per LOAD (Amps) & RUN (Feet)
LOAD
IN
AMPS
LENGTH OF RUN IN FEET
40'
50'
60'
70'
80'
90'
100'
125'
150'
175'
200'
5
6
7
8
9
10
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
14
12
14
14
14
14
12
12
14
14
14
12
12
12
14
12
12
12
12
10
12
12
12
12
10
10
12
12
12
10
10
10
12
14
16
18
20
14
14
12
12
12
14
14
12
12
12
14
14
12
12
12
14
12
12
12
12
12
12
12
12
10
12
12
12
10
10
12
12
10
10
10
10
10
10
10
8
10
10
8
8
8
10
8
8
8
8
8
8
8
6
6
25
30
35
40
45
50
10
10
10
8
8
8
10
10
8
8
8
8
10
10
8
8
8
8
10
8
8
8
8
8
10
8
8
8
8
6
10
8
8
6
6
6
8
8
8
6
6
6
8
6
6
6
6
4
6
6
6
4
4
4
6
6
4
4
4
4
6
4
4
4
4
2
60
70
80
90
100
6
6
6
4
2
6
6
6
4
2
6
6
6
4
2
6
6
6
4
2
6
6
4
4
2
6
4
4
4
2
4
4
4
4
2
4
4
2
2
2
2
2
2
2
1
2
2
2
1
1
2
2
1
1
0
115
130
145
160
180
200
1
1
0
00
000
000
1
1
0
00
000
000
1
1
0
00
000
000
1
1
0
00
00
00
1
1
0
00
000
000
1
1
0
00
000
000
1
1
0
00
000
000
1
0
00
00
000
0000
0
0
00
000
0000
0000
0
0
00
000
0000
0000
00
00
00
000
0000
0000
225
250
275
300
0000
250
300
350
0000
250
300
350
0000
250
300
350
0000
250
300
350
0000
250
300
350
0000
250
300
350
0000
250
300
350
0000
250
300
400
250
300
350
400
250
300
350
400
250
300
350
400
325
350
375
400
400
500
500
600
400
500
500
600
400
500
500
600
400
500
500
600
400
500
500
600
400
500
500
600
400
500
500
600
400
600
600
700
500
600
600
700
500
600
600
700
500
600
600
700
Table 3. Minimum Wire Size Requirements
16
DISCONNECT
A properly sized, separate, lock out type disconnect for each fan should be mounted on
the main power panel, especially if the fan unit is not entirely visible from the main power
panel.
INCOMING POWER SUPPLY
The incoming power supply must be connected to the bottom of the fan starter (if so
equipped) in an approved manner. Power leads must be run above or below ground
in approved weather tight conduit. The leads should be connected in order to provide
counterclockwise wheel rotation when viewed from air inlet side of the fan. Be sure to check
for low line voltages especially when connecting single phase motors. The recommended
incoming phase, voltage, and frequency are located on the metal motor nameplate.
GROUNDING
NECO recommends that grain bin electrical devices be connected to a ground rod that is
no further than 8 feet away. The ground rod should be connected with a minimum 6 AWG
solid, bare copper wire. The ground rod must be copper-clad and 5/8” diameter x 8 feet long.
Install the rod 2 feet away from the fan and/or bin foundation and in accordance with local
requirements.
The ground rod-to-bin connection provides additional safety in the event of a short or
lightning strike. It also provides the necessary grounding for operation and helps provide for
a long life of control circuits.
NECO does not supply or sell ground rods and wires. Please contact your local electrical
parts supplier. NECO recommends that the rod not be driven into dry ground.
NOTE: The following is considered to be reference only for a typical ground rod installation:
1. Dig a ditch large enough to hold 1 to 2 gallons of water.
2. Fill the ditch with water.
3. Push the rod into the water and jab it into the ground - repeatedly, to allow the water to
work its way into the hole. Drive the rod completely into the ground.
5. Connect one end of the ground wire to the rod with an appropriate ground clamp.
6. Connect the other end of the wire to a ground lug connector inside the fan control
box. The ground wire should not have any splices or breaks. Insulated wire is not
recommended for grounding purposes.
HEATER INTERLOCK (IF SO EQUIPPED)
If the fan unit is equipped with a factory supplied motor control unit, then an optional heater
must be powered by this unit. This will prevent the heater from starting if the fan is not
running.
WARNING
NEVER plug the heater into a separate power source - make absolutely certain that it
is connected to the fan motor control box so that the fan interlock will operate.
17
Wiring Schematics
SHOCK
HAZARD
See Figures 4,5,6,7,8,9, & 10 wiring schematics
for the various fan motor sizes & possible add-on
heater combinations. All work should be done by a
qualified electrician.
NOTE: These schematics are shown for reference only - check the motor
nameplate for wiring diagram specifics and verification.
Figure 4 shows a wiring diagram for an 18", 3hp, single-phase fan starter. This wiring
diagram represents NECO catalog number 04AS8301.
Figure 4
18
Figure 5 shows a wiring diagram for an 18", 3hp, 230V & 460V, three-phase fan starters.
This wiring diagram represents NECO catalog numbers 04AS8303 & 04AS830A.
Figure 5
Figure 6 shows a wiring diagram for a 24", 5-7hp, single-phase fan starter. This wiring
diagram represents NECO catalog number 04AC4501.
Figure 6
19
Figure 7 shows a wiring diagram for a 24", 7.5-10hp, single-phase fan starter. This wiring
diagram represents NECO catalog numbers 04AC4751.
Figure 7
Figure 8 shows a wiring diagram for a 28", 10-15hp, single-phase fan starter. This wiring
diagram represents NECO catalog number 04AC8101.
Figure 8
20
Figure 9 shows a wiring diagram for 24" & 28", 5-7,7.5-10, & 10-15hp, 230V, three-phase fan
starters. This wiring diagram represents NECO catalog numbers 04AC4503, 04AC4753, and
04AC8103.
Figure 9
Figure 10 shows a wiring diagram for 24" & 28", 5-7,7.5-10, & 10-15hp, 460V, three-phase
fan starters. This wiring diagram represents NECO catalog numbers 04AC450A, 04AC475A,
and 04AC810A.
Figure 10
21
5. OPERATION
Pre-Start Instructions
• With the power supply disconnected and locked out, make certain that the fan / heater
are free of debris.
• Rotate the fan impeller to make sure that it revolves easily and does not rub against the
housing.
• Make certain the fan guard is securely in place.
• Inspect ALL fasteners to make sure they are tight. If any are loose, check for proper
clearance and retighten.
• Be sure that the disconnect switch and the fan / heater are properly grounded.
Ensure Proper Motor Rotation
ATTENTION: Prior to testing or running the newly installed fan, ensure there is sufficient air
that can ENTER the bin - open access doors, exhaust fans turned ON, etc.
• The first time the fan is started, run it briefly to ensure rotation is in the proper direction
and that air is flowing out of the bin.
• If air is flowing in the wrong direction, instruct your electrician to reverse the the motor
connections and re-check to ensure proper rotation and air flow.
Normal Operation
NOTE: The fan SHOULD BE RUN AT LEAST 30 CONTINUOUS MINUTES EVERY 3
WEEKS to eliminate damaging moisture buildup in the motor.
• Ensure the unit always runs in conjunction with exhaust fans, etc.
• Single-phase motors may encounter problems during the initial starting surge. The
initial starting amperage surge is usually about 5 times the nameplate rating. The total
voltage drop should not be below 190 volts on starting surge nor should it be lower
than the NEMA-specified 10% of line voltage during continuous motor operation. If the
voltage drops below 190 volts during the starting surge, the capacitors may burn out. If
line voltage remains low during operation, the motor is likely to overheat in which case a
nuisance shutoff or burnout is likely to occur.
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Fan Air Delivery
23
6. MAINTENANCE
WARNING
Follow all safety procedures as outlined in the SAFETY section of this manual.
Use Lock-Out / TagOut procedures when required and ensure all guards are in place.
NECO takes pride in choosing quality vendors and products in association with the design
and manufacture of our products:
• OEM products have a service life related to operating conditions and usage.
• Contact the OEM product manufacturer for service, replacement, or warranty concerns.
Prior to each season or usage:
• Complete the “OPERATION - Pre Start” instructions and verify completion for each step.
During regular usage - based on overall conditions and amount of usage:
• Run the fan AT LEAST 30 CONTINUOUS MINUTES EVERY 3 WEEKS to eliminate
damaging moisture buildup in the motor - MAKE SURE EXHAUST IS ADEQUATE.
• Keep the outlet guard free of debris - motor will eventually overheat and shut down if
debris are allowed to accumulate. Debris are also one of the main causes of abnormal
vibrations and excessive moisture buildup.
• Check for impeller damage and replace if needed. Damage usually results in an out-ofbalance situation, which causes vibration.
• Inspect and immediately replace any damaged fan guards.
• Check for proper lubrication.
Lubrication Requirements
On greaseable sealed bearings, apply grease ONLY until a thin bead of new grease is
visible along the seal edge. Applying excessive grease may force out the seals, causing
contamination and rapid bearing wear.
• Motor bearings are double-sealed and require little or no servicing. Any servicing should
be performed by an authorized motor service center.
Fan Motor
Motors used in fan units are standard NEMA* frame motors. These motors are designed for
use in crop drying and are protected either by built-in thermal overloads or by an overload
heater on the starter unit.
* National Electrical Manufacturers Association (USA)
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7. APPENDIX
Troubleshooting Section
Problem
Reason
No power
Fails to start
Bad coil
The reset switch on the
overload relay is out
No ground
Low amps and low voltage
Fails to come up
to speed within 10
seconds
Blows fuses or trips
circuit breakers
Excessive vibration
Quits after operating a
few hours
Bad starter capacitor
Bad centrifugal switch
(if equipped)
The fuse and/or the circuit
breaker have inadquate
capacity
There's a short in either the
fan controls or motor
Cover on fan inlet
Blade is out of balance
Debris is on the blade
Unit is not tightened down
Unit is not level
Weak coil (magnetic starter)
High amps
Control box is in the sun on a
very hot day
Severe vibration is causing
contactor to drop out
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Solution
Replace the fuse (main power
supply)
Replace coil on the contactor
Reset the switch and set for
automatic
Establish a good ground
connection
Check amperage with amp
probe and consult with power
supplier
Replace starter capacitor
Replace switch or replace motor
Use FRN Fusetron or larger
circuit breaker
Check for hot wires
Remove cover
Balance or replace blade
Remove debris from the blade
Tighten fasteners
Level and secure unit
Replace the coil
Check the heater strip size and
amperage draw (check voltage)
Shade the control box and/or
provide vent to help cool it
Eliminate the vibration
Replacement Parts - 12" to 16" Fans
Figure 11 - 12" to 16" Axial Fan Replacement Parts
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Replacement Parts - 18" to 28" Fans
Figure 12 - 18" to 28" Axial Fan Replacement Parts
27
MANUFACTURED BY
NECO
A Division of GLOBAL Industries, Inc.
9364 North 45th Street
Omaha, Nebraska 68152
TEL: 402-453-6912
FAX: 402-453-0471
Toll-free (within Nebraska): 1-800-367-6210
Toll-free (outside Nebraska): 1-800-367-6208
www.necousa.com