COOK Propeller Wall Fans - Manual (Page 4)

4
• 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
Recommended Torque for Setscrews/Bolts
In. - Lb.
Setscrews Hold Down Bolts
Size
Key Hex
Across
Flats
Recommended
Torque
Recommended
Torque
Min. Max. Size
Wrench
Torque
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
Inspection
Inspection of the fan should be conducted at the first
30 minute, 8 hour and 24 hour intervals of satisfactory
operation. 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.
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. Regular
inspections are recommended for fans exhausting
non-contaminated air. It is recommended the following
inspections be conducted twice per year.
• Inspect bolts and setscrews for tightness. Tighten as
necessary.
Shutters
If your fan is supplied with a shutter, follow the direction
below. If your fan is not supplied with a shutter, proceed
to Final Installation Steps.
To ensure long-life, make a weather-proof seal by using
a good quality silicon caulking under the shutter flange.
1. Place the shutter into the wall opening.
2. Mount the shutter to the supporting surface using
Number 12 sheet metal screws on six inch centers
around the perimeter.
3. Manually operate the shutter to ensure the blades
move freely.
Typical Installation
Refer to page 8.
Final Installation Steps
1. Inspect fasteners and setscrews, particularly
fan mounting and bearing fasteners, and tighten
according to the recommended torque shown in
the table on page 4, Recommended Torque for
Setscrews/Bolts.
2. Inspect for correct voltage with voltmeter.
3. Ensure all accessories are installed.
4. Test the fan to be sure the rotation is the same as
indicated by the arrow marked Rotation.
Proper 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.
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power
sources.
2. nspect fasteners and setscrews, particularly
those used for mounting the unit, and tighten if
necessary.
3. Inspect belt tension and pulley alignment.
(Remember, if belt tension is correct, a loud squeal
occurs as the fan increases to full power.)
4. Inspect motor wiring.
5. Ensure the belt touches only the pulleys.
6. Rotate the prop to ensure it does not rub against
the venturi.
7. Ensure fan and ductwork are clean and free of
debris.
8. Test the fan to ensure the rotation of the propeller
is the same as indicated by the rotation label.
9. Close and secure all access doors.
10. 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: