Loren Cook Propeller Inline Installation Manual

Propeller Inline

Tube Axial Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation

and maintenance procedures for standard units of the

Tube Axial Fans:

• AD

• ED

• TID

• TIB

Carefully read this publication prior to any installa-

tion 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 [phone], exten­sion 166; by FAX at [phone]; or by e-mail at
[e-mail].

For information and instructions on special equipment,
contact Loren Cook Company at [phone].

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 an
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
housing or mounting brackets. 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 sup-

plied) 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.

WARNING

This unit has rotating parts. Safety precautions

should be exercised at all times during installation,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.

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.

Personal Safety

Disconnect switches are recommended. Place
the disconnect switch 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.

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.

Correct

Incorrect Incorrect

Incorrect

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.

Figure 2

Pulley Alignment

Pulley alignment is adjusted by loos­ening the motor pulley setscrew and by
moving the motor pulley on the motor
shaft or by moving the entire motor
along the motor mounting bracket.

Figure 2 illustrates correct and incor­rect pulley alignment. A recommended
method of inspecting the pulley align­ment is shown in Figure 3. With the
shorter leg of a carpenter’s square or

Figure 3

other straight edge lying along the case of the motor, adjust
the position of the motor pulley (or the motor) until the
longer leg of the square is parallel to the belt.

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.

Lock off all power sources before unit is wired to
power source.

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.

Personal Safety

Disconnect switches are recommended. Place the
disconnect switch 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.

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, Rec-

ommended 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.

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.

Recommended Torque for Setscrews/Bolts (IN/LB.)

Setscrews

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

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

Hold Down Bolts

Wrench

Torque

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. (Remember,

if belt tension is correct, a loud squeal occurs as 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 continu-

ous squealing noise).

• Improper motor amperage or voltage.

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.

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