Propeller Inline
Tube Axial Fans
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains the installation, operation and
maintenance procedures for standard units of the ADD,
ADB, EDD, EDB, TID & TIB Tube Axial Fans:
Carefully read this publication and any supplemental documents prior to any installation or
maintenance procedure.
Loren Cook catalog Propeller Inline provides additional
information describing the equipment, fan performance,
available accessories and specification data.
For additional safety information, refer to AMCA publication 410-96, Safety Practices for Users and Installers of
Industrial and Commercial Fans.
All of the publications listed above can be obtained from
Loren Cook Company by phoning (417)869-6474, extension 166; by FAX at (417)832-9431; or by e-mail at
info@lorencook.com.
For information and instructions on special equipment,
contact Loren Cook Company at (417)869-6474.
Receiving and Inspection
Carefully inspect the fan and accessories for any damage
and shortage immediately upon receipt of the fan.
• Turn the propeller by hand to ensure it turns freely and
does not bind.
• Record on the Delivery Receipt any visible sign of damage.
Handling
Lift tube axial fans by placing a sling around the fan hous-
ing or mounting brackets. NOTICE! Never lift by the shaft
or motor.
Storage
If the fan is stored for any length of time prior to installation,
rotate the propeller several revolutions every three to five
days. This keeps a coating of grease on all internal bearing
parts. Block propeller to prevent natural rotation and store it
in its original shipping crate and protect it from dust, debris
and the weather.
Outdoor Storage
To maintain good working condition of the fan when it is
stored outdoors or at a construction site, follow the additional instructions below.
• Coat the shaft and bearings with grease or rust preventative compound to help seal out moisture.
• Periodically rotate the propeller and dampers (if supplied) to keep a coating of grease on all internal bearing
parts.
• Periodically inspect the fan to prevent damaging conditions.
• Block propeller to prevent natural rotation.
• Cover the unit with some type of weather cover to prevent moisture, corrosion, dirt or dust accumulation.
Installation
Motor Installation
To prevent damage to the fan during shipping, motors 5
HP and larger, and extremely heavy motors (cast iron or
severe duty) are shipped loose and must be field mounted
by bolting the motor on the motor mounting plate in the
existing mounting slots.
Rotating Parts & Electrical Shock Hazard:
Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure
the unit cannot be energized while being installed or
serviced.
A disconnect switch should be placed near the fan in
order that the power can be swiftly cut off, in case of
an emergency and in order that maintenance
personnel are provided complete control of the power
source.
Grounding is required. All field-installed wiring must
be completed by qualified personnel. All fieldinstalled wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.
Failure to follow these instructions could result in
death or serious injury.
EDB
Belt and Pulley Installation
1 foot
1/4 inch
If your fan is a direct drive, proceed to Isolator Installation.
Belt tension is determined by the sound of the belts when
the fan is first started. The belts will produce a loud squeal,
which dissipates after the fan is operating at full capacity. If
belt tension is too tight or too loose, lost efficiency and damage can occur.
Figure 1
Do not change the pulley pitch diameter to change tension. The change will result in a different fan speed.
a. Loosen the motor plate adjustment nuts on motor base
and move motor plate in order that the belts can easily
slip into the grooves on the pulleys. Never pry, roll, or
force the belts over the rim of the pulley.
b. Adjust the motor plate until proper tension is reached.
For proper tension, a deflection of approximately 1/4”
per foot of center distance should be obtained by firmly
pressing the belt. Refer to Figure 1.
c. Lock the motor plate adjustment nuts in place.
d. Ensure pulleys are properly aligned. Refer to Figure 2.
Tolerance
Center Distance
Up thru 12” 1/16”
12” up through 48 1/8”
Over 48” 1/4”
Figure 2
Maximum
Gap
OFFSET ANGULAR OFFSET/ANGULAR
A
W
B
CENTER
DISTANCE
(CD)
GAP
X
Y
Z
GAP
Pulley Alignment
Pulley alignment is adjusted by loosening the motor pulley
setscrew and by moving the motor pulley on the motor shaft.
Figure 2 indicates where to measure
the allowable gap for the drive alignment tolerance. All contact points (indicated by WXYZ) are to have a gap less
than the tolerance shown in the table.
When the pulleys are not the same
width, the allowable gap must be
adjusted by half of the difference in
width (As shown in A & B of Figure 2).
Figure 3 illustrates using a carpenter’s
square to adjust the position of the
motor pulley until the belt is parallel to
the longer leg of the square.
Figure 3
Isolator Installation
Floor Mounted Fans
If the fan is being mounted to a metallic base, isolation
pads should be used between the unit and its base to
reduce vibration and noise.
Floor Mounted Rubber-In-Shear (RIS) Isolators
a. Elevate the fan to provide room to insert isolators
between the fan and foundation and block in position.
b. Position isolators under the fan and secure bolts.
c. Remove blocks and allow the fan to rest on floor. Isola-
tors must be installed on a level surface so leveling
should not be required.
d. Secure isolators to mounting surface.
Floor Mounted Rubber-In-Shear Isolator
Ceiling Mounted Fans
The most common method used to mount a ceiling fan to
its support structure is with ceiling mounted spring and rubber-in-shear (RIS) isolators.
a. Elevate the fan to operating height and brace.
b. Attached threaded rod to overhead support structure
directly above each mounting hole. The rod should
extend to within a few feet of the fan.
c. Attach isolator to end of threaded rod using a nut on
each side of the isolator bracket.
d. Insert another section of threaded rod through the fan
mounting hole and isolator.
e. Attach two nuts to threaded rod in isolator.
f. Place adjusting nut and locking nut on threaded rod
near fan mounting bracket.
g. Alternately rotate adjusting nut at each mounting loca-
tion until the fan weight is uniformly transferred to the
isolators. Remove bracing.
h. Turn locking nut and secure firmly in place against
mounting bracket.
Ceiling Mounted Spring Isolator
Rubber-In-Shear Ceiling Isolators
Fan Installation
If your fan is a direct drive, proceed to Wiring Installation
before completing attachment to the duct.
Floor Mounted Units
a. Bolt down the fan.
b. When the fan is secure, attach the duct to the flanges.
c. Drill holes through the flanges to match the duct, then
bolt the duct and flanges together.
2
Ceiling Mounted Units
a. Mount the fan to its support structure.
b. When all the installation supports have been removed
and the fan is supported only by the permanent structure, attach the duct work.
c. Drill holes through the flanges to match the duct, then
bolt the duct and flanges together.
Wiring Installation
All wiring should be in accordance with local ordinances
and the National Electrical Code, NFPA 70. Ensure the
power supply (voltage, frequency, and current carrying
capacity of wires) is in accordance with the motor nameplate. Refer to the Wiring Diagrams, next page.
Leave enough slack in the wiring to allow for motor
movement when adjusting belt tension. Some fractional
motors have to be removed in order to make the connection with the terminal box at the end of the motor.
Follow the wiring diagram in the disconnect
switch and the wiring diagram provided with the
motor. Correctly label the circuit on the main
power box and always identify a closed switch
to promote safety (i.e., red tape over a closed
switch).
Belt Drive Fans
a. Run wire to the fan. Restrain wire to the housing or
motor plate to prevent it from being pulled into the
shaft.
b. Pull the wire into the motor. For final connections, fol-
low the wiring diagram provided on the motor.
Direct Drive Fans
a. Drill a hole through the fan housing at a convenient
location and pull the wire through it or pull the wire
through the intake duct.
b. Pull the wire into the motor wiring box. Restrain the
wire to prevent it from being pulled into the shaft.
c. For final connections, follow the wiring diagram pro-
vided on the motor.
Final Installation Steps
a. Inspect fasteners and setscrews, particularly fan
mounting and bearing fasteners, and tighten according to the recommended torque shown in the table,
Recommended Torque for Setscrews/Bolts.
b. Inspect for correct voltage with voltmeter.
c. Ensure all accessories are installed.
d. Test the fan to be sure the rotation is the same as indi-
cated by the arrow marked Rotation.
NOTICE! Do not allow the fan to run in the wrong
direction. This will overheat the motor and cause serious damage. For 3-phase motors, if the fan is running
in the wrong direction, check the control switch. It is
possible to interchange two leads at this location so
that the fan is operating in the correct direction.
Operation
Pre-Start Checks
a. Lock out all the primary and secondary power
sources.
b. Inspect fasteners and setscrews, particularly those
used for mounting the unit, and tighten if necessary.
c. Inspect belt tension and pulley alignment. (Remem-
ber, if belt tension is correct, a loud squeal occurs as
Recommended Torque for Setscrews/Bolts (IN/LB.)
Setscrews
Key Hex
Size
No.10 3/32” 28 33 3/8”-16 240
1/4” 1/8” 66 80 1/2”-13 600
5/16” 5/32” 126 156 5/8”-11 1200
3/8” 3/16” 228 275 3/4”-10 2100
7/16” 7/32” 348 384 7/8”-9 2040
1/2” 1/4” 504 600 1”-8 3000
5/8” 5/16” 1104 1200 1-1/8”-7 4200
3/4” 3/8” 1440 1800 1-1/4”-7 6000
Across
Flats
Recommended
Torque
Min. Max. Size
Hold Down Bolts
Wrench
Torque
the fan increases to full power.)
d. Inspect motor wiring.
e. Ensure the belt touches only the pulleys.
f. Rotate the prop to ensure it does not rub against the
venturi.
g. Ensure fan and ductwork are clean and free of debris.
h. Test the fan to ensure the rotation of the propeller is
the same as indicated by the rotation label.
i. Close and secure all access doors.
j. Restore power to unit.
Start Up
Turn the fan on. In variable speed units, set the fan to its
lowest speed. Inspect for the following:
• Direction of rotation.
• Excessive vibration.
• Unusual noise.
• Bearing noise.
• Improper belt alignment or tension (listen for a continuous squealing noise).
• Improper motor amperage or voltage.
NOTICE! If a problem is discovered, immediately
shut off the fan. Lock out all electrical power and check
for the cause of the trouble. Refer to Troubleshooting,
page 6.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory opera-
tion. During the inspections, stop the fan and inspect as per
directions below.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts.
Adjust and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten as
necessary.
24 Hour Interval
Inspect belt tension. Adjust and tighten as necessary.
3
Wiring Diagrams
Single Speed, Single Phase Motor
Ground A
L
T-1
T-4
Ground B
When ground is required, attach to ground A or B with no. 6 thread forming
Line
L
1
2
Wiring Diagrams
3 Phase, 9 Lead Motor
Y-Connection
Low Voltage
208/230 Volts
4
5
6
3
1
9
728
L2L
L
1
To reverse, interchange any 2 line leads.
3
High Voltage
460 Volts
456
789
3
12
L2L
L
3
1
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage
208/230 Volts
7
6
1
L
1
screw. To reverse, interchange T-1 and T-4.
2 Speed, 2 Winding, Single Phase Motor 2 Speed, 1 Winding, 3 Phase Motor
Ground A
L
T-5
J-10
Link A
Link B
Low Voltage
Ground B
Line
L
1
T-5
J-10
2
Ground B
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-1 and T-4 leads.
Ground A
Link A & B
L
Line
L
High Speed
1
Motor
2
1
Together
2
3
L
4
1
L
5
2
6
Line
L
3
Motor
To reverse, interchange any 2 line leads. Motors require magnetic control.
Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase
8
4
2
L
L
3
2
Low Speed
9
5
3
1
2
3
4
5
6
High Voltage
460 Volts
789
456
3
12
L1L
L
3
2
L
1
L
2
Line
L
3
Open
Ground A
T-1
T-4
Ground B
High Speed
Low Speed
L
1
Line
L
2
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-5 and J-10 leads.
Typical Damper Motor Schematic
Fan
Motor
Transformer**
Damper
Motor*
Transformer**
Second
Damper
Motor
L3
L2
L1
For 3 phase, damper motor voltage should be the same between L1 and
L2. For single phase application, disregard L3. *Damper motors may be
available in 115, 230 and 460 volt models. The damper motor nameplate
voltage should be verified prior to connection. ** A transformer may be provided in some installations to correct the damper motor voltage to the
specified voltage.
Maintenance
Establish a schedule for inspecting all parts of the
fan.The frequency of inspection depends on the operating
conditions and location of the fan.
Inspect fans exhausting corrosive or contaminated air
within the first month of operation. Fans exhausting contaminated air (airborne abrasives) should be inspected every
three months. Clean the propeller and air inlets if material
build-up is excessive. Excessive build-up can cause imbalance and failure of the propeller. Always clean the entire
propeller as partial cleaning will cause imbalance and fan
failure.
Regular inspections are recommended for fans exhausting non-contaminated air.
To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T1 and T2. Both Speeds-interchange any 2
line leads.
It is recommended the following inspections be con-
ducted twice per year.
• Inspect bolts and setscrews for tightness. Tighten as
necessary.
• Inspect belt wear and alignment. Replace worn belts
with new belts and adjust alignment as needed. See
Belt and Pulley Installation, page 1.
• Bearings should be inspected as recommended in the
Conditions Chart, page 5.
• Inspect for cleanliness. Clean exterior surfaces only.
Removing dust and grease on motor housing assures
proper motor cooling.
4
Lubricants
Loren Cook Company uses petroleum lubricant in a lithium base conforming to NLGI grade 2 consistency. Other
grades of grease should not be used unless the bearings
and lines have been flushed clean. If another grade of
grease is used, it should be lithium-based.
A NLGI grade 2 grease is a light viscosity, low-torque,
rust-inhibiting lubricant that is water resistant. Its temperature range is from -30F to +200F and capable of intermittent highs of +250F.
Motor Bearings
Motor bearings are pre-lubricated and sealed. Under normal conditions they will not require further maintenance for
a period of ten years. However, it is advisable to have your
maintenance department remove and disassemble the
motor, and lubricate the bearings after three years of operation in excessive heat and or in a contaminated airstream
consisting of airborne abrasives.
Conditions Chart
RPM Temperature
100 Up to 120°F Clean 6 to 12 months
500 Up to 150°F Clean 2 to 6 months
1000 Up to 210°F Clean 2 weeks to 2 months
1500 Over 210°F Clean Weekly
Any
Speed
Any
Speed
Any
Speed
Any
Speed
Up to 150°F Dirty 1 week to 1 month
Over 150°F Dirty Daily to 2 weeks
Any Temperature Very Dirty Daily to 2 weeks
Any Temperature
Fan
Status
Extreme
Conditions
Greasing
Interval
Daily to 2 weeks
Fan Bearings
Fan bearings are lubricated through a grease connector
and should be lubricated by the schedule, Conditions Chart,
shown above.
For best results, lubricate the bearing while the fan is rotating. Slowly pump grease into the bearing until a slight bead
forms around the bearing seals. Excessive grease can burst
seals thus reduce bearing life.
In the event the bearing cannot be seen, use no more than
three injections with a hand-operated grease gun.
Motor Services
Should the motor prove defective within a one-year
period, contact your local Loren Cook representative or your
nearest authorized electric motor service representative.
Changing Shaft Speed
All belt driven Tube Axial fans with motors up to and
including 5HP are equipped with variable pitch pulleys. To
change the fan speed, perform the following:
a. Loosen setscrew on driver (motor) pulley and remove
key, if equipped.
b. Turn the pulley rim to open or close the groove facing. If
the pulley has multiple grooves, all must be adjusted to
the same width.
c. After adjustment, inspect for proper belt tension.
Speed Reduction
Open the pulley in order that the belt rides deeper in the
groove (smaller pitch diameter).
Speed Increase
Close the pulley in order that the belt rides higher in the
groove (larger pitch diameter). Ensure that the RPM limits
of the fan and the horsepower limits of the motor are maintained.
Pulley and Belt Replacement
a. Clean the motor and fan shafts.
b. Loosen the motor plate mounting bolts to relieve the
belt tension. Remove the belt.
c. Loosen the pulley setscrews and remove the pulleys
from the shaft.
If excessive force is required to remove the pulleys, a three-jaw puller can be used. This tool,
however, can easily warp a pulley. If the puller is
used, inspect the trueness of the pulley after it is
removed from the shaft. The pulley will need
replacement if it is more than 0.020 inch out of
true.
d. Clean the bores of the pulleys and place a light coat of
oil on the bores.
e. Remove grease, rust and burrs from the shaft.
f. Place fan pulley on the fan shaft and the motor pulley
on the motor shaft. Damage to the pulleys can occur
when excessive force is used in placing the pulleys on
their respective shafts.
g. After the pulleys have been correctly placed back onto
their shafts, tighten the pulley setscrews.
h. Install the belts on the pulleys. Align and adjust the
belts to the proper tension as described in Belt and Pul-
ley Installation, page 1.
Bearing Replacement
The fan bearings are pillow block ball bearings.
a. Loosen the motor plate mounting bolts and remove the
drive belts.
b. Gain access to the interior of the fan. Remove duct
work and/or guards as necessary.
c. Remove the propeller from the shaft.
d. Remove the bearing cover from the bearing plate.
e. Remove the four bearing hold-down bolts and then
remove the shaft, bearings, and driven sheave from
the unit as an assembly.
f. Mark the location of the bearings and sheave on the
shaft. This will aid the reassembly.
g. Remove the anti-corrosion coating from the shaft with a
suitable degreaser and then remove the pulley from the
shaft.
h. Remove the bearings from the shaft using a bearing
puller.
i. Clean the shaft and bearing bores thoroughly.
j. Place the bearings into position making sure they are
not on a worn section of the shaft. Tapping the inner
ring face with a soft driver may be required.
NOTICE! Do not hammer on the housing. This my
cause damage to the bearings.
5
k. Install the pulley in the correct location on the shaft.
Secure the bearing hold-down bolts, but do not fully
tighten.
l. Align the setscrews on the top bearing with those on
the lower bearing. Tighten one of the setscrews on
each bearing.
m. Rotate the shaft to allow the bearing outer rings to find
their center of free movement. If your fan is supplied
with a lube line, attach it to the grease connection.
n. Install the propeller on the shaft and adjust bearing
position to center the propeller in the opening.
o. Tighten hold-down bolts to proper torque. Refer to the
torque chart on page 3.
p. Turn the shaft by hand. Resistance should be the same
as it was before hold-down bolts were fully tightened.
r. Re-assembly the fan.
After 24 hours of continuous operation, tighten the setscrews to the appropriate torque. This assures the full locking of the inner race to the shaft. Ensure the socket key or
driver is in good condition with no rounded corners. The key
should be fully engaged in the setscrew and held squarely
to prevent the rounding out of the setscrew socket when
applying maximum torque.
Propeller and Shaft Replacement Precautions
• If the shaft is dropped and bent, it may cause unbalanced operation of the fan.
• When handling the propeller separately from the shaft,
place a support through the hub for lifting, making sure
not to injure the finished bore of the propeller.
• Never allow the propeller to rest its entire weight on the
blades. The propeller and shaft can be lifted by slings
around the shaft on each side of the propeller so the
propeller is supported by its hub.
• If using a chain to lift the propeller, make sure there is
sufficient padding on the shaft and propeller. This prevents the scoring of the shaft or injury to the propeller.
The chain or cable should be spread with timbers, or
braced by some other method to prevent damage to the
propeller side plates.
Troubleshooting
Problem and Potential Cause
Low Capacity or Pressure
•Incorrect direction of rotation. Make sure the fan rotates in same direction
as the arrows on the motor or belt drive assembly.
•Poor fan inlet conditions. There should be a straight clear duct at the in-
let.
•Improper propeller alignment.
Excessive Vibration and Noise
•Damaged or unbalanced propeller.
•Belts too loose; worn or oily belts.
•Speed too high.
•Incorrect direction of rotation. Make sure the fan rotates in same direction
as the arrows on the motor or belt drive assembly.
•Bearings need lubrication or replacement.
•Fan surge.
Overheated Motor
•Motor improperly wired.
•Incorrect direction of rotation. Make sure the fan rotates in same direction
as the arrows on the motor or belt drive assembly.
•Cooling air diverted or blocked.
•Improper inlet clearance.
•Incorrect fan RPMs.
•Incorrect voltage.
Overheated Bearings
•Improper bearing lubrication
•Excessive belt tension.
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2
3
4
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2
3
4
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2
3
4
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ADD, EDD, and TID Parts List
ADD
TID
EDD
Part
No.
ADD Sizes 12-24 EDD Sizes 24-48 TID Sizes 20-60
1 Motor (as required) Motor (as required) Motor (as required)
Cast Aluminum Pro-
2
3
4 Motor Plate Motor Plate Motor Plate
peller
Housing/Power
Assembly
Description
Extruded Aluminum
Propeller
Housing/Power
Assembly
Welded Steel Pro-
peller
Housing/Power
Assembly
7
1
2
3
4
6
5
7
8
10
9
11
12
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1
2
3
4
5
7
8
9
10
11
12
6
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ADB, EDB, and TIB Parts List
1
2
3
4
5
6
8
7
11
10
9
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12
10
ADB
12
11
EDB
Parts
No.
ADB 16-48 EDB 24-60 TIB 20-72
Description
1 Motor Motor Motor
2 Motor Plate Motor Plate Motor Plate
3 Motor Plate Studs (4) Motor Plate Studs (4) Motor Plate Studs (4)
4 Shaft Shaft Shaft
5
6
Weather Cover
(optional)
Cast Aluminum
Propeller
Weather Cover
(optional)
Extruded Aluminum
Propeller
Weather Cover
(optional)
Welded Steel
Propeller
7 Bearings Bearings Bearings
8
Housing/Power
Assembly
Housing/Power
Assembly
Housing/Power
Assembly
9 Bearing Cover Bearing Cover Bearing Cover
10 Driven Sheave Driven Sheave Driven Sheave
11 Belt Set Belt Set Belt Set
12 Driver Sheave Driver Sheave Driver Sheave
TIB
Limited Warranty
Loren Cook Company warrants that your Loren Cook fan was manufactured free of defects in materials and workmanship, to the extent stated herein. For a period of one (1)
year after date of shipment, we will replace any parts found to be defective without charge, except for shipping costs which will be paid by you.
This warranty is granted only to the original purchaser placing the fan in service.
This warranty is void if the fan or any part thereof has been altered or modified from its original design or has been abused, misused, damaged or is in worn condition or if the
fan has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear.
To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining in writing, in detail, your complaint
and referring to the specific model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notified, within thirty (30) days of
our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warranty relief, a warranty adjustment will be completed within
sixty (60) business days of the receipt of your written complaint by Loren Cook Company.
This warranty gives only the original purchaser placing the fan in service specifically the right. You may have other legal rights which vary from state to state.
For fans provided with motors, the motor manufacturer warrants motors for a designated period stated in the manufacturer’s warranty. Warranty periods vary from manufacturer
to manufacturer. Should motors furnished by Loren Cook Company prove defective during the designated period, they should be returned to the nearest authorized motor service station. Loren Cook Company will not be responsible for any removal or installation costs.
Airflow
Corporate Offices: 2015 E. Dale Street Springfield, MO 65803 417.869.6474
lorencook.com
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Propeller Inline IOM - Feb 2014
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