COOK ACSC - Manual (Page 3)

Setscrews
Hold Down Bolts
Size
Key Hex
Across
Flats
Recommended
Torque Inch-lbs.
Min. Max. Size
Wrench
Torque (inch-
lbs)
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
3
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power
sources.
2. Inspect and tighten fasteners and setscrews, particu-
larly fan mounting and bearing fasteners Refer to
Torque chart.
3. Inspect belt tension and pulley alignment. Refer to
Belt and Pulley Installation, page 3.
d. Inspect motor wiring. Refer to Wiring Installation.
4. Ensure belt touches only the pulleys.
5. Rotate the wheel to ensure it rotates freely.
6. Ensure fan and ductwork are clean and free of debris.
7. Close and secure all access doors.
8. Restore power to fan.
Start-up
Turn on the fan. 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 squeal-
ing)
• Improper motor amperage or voltage
If a problem is discovered, immediately shut the fan
off. Lock out all electrical power and check for the
cause of the trouble. Refer to Troubleshooting on
page 5.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory oper-
ation. During the inspections, stop the fan and inspect as
instructed.
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
Fan Bearings
Recommended Torque for Setscrews/Bolts (IN/LB)
NOTICE! The fan bearings are provided
prelubricated. Any specialized lubrication instructions
on fan labels supersedes information provided herein.
Bearing grease is a petroleum lubricant in a lithium
base conforming to a NLGI #2 consistency. If user
desires to utilize another type of lubricant, they take
responsibility for flushing bearings and lines, and
maintaining a lubricant that is compatible with the
installation.
A NLGI #2 grease is a light viscosity, low-torque, rust-
inhibiting lubricant that is water resistant. Its temperature
range is from -30°F to 200°F and capable of intermittent
highs of 250°F.
Bearings should be relubricated in accordance with the
condition chart above.
For best results, lubricate the bearing while the fan is in
operation. Pump grease in slowly until a slight bead forms
around the bearing seals. Excessive grease can damage
seal and reduce life through excess contamination and/or
loss of lubricant.
In the event that the bearing cannot be seen, use no
more than three injections with a hand operated grease
gun.
Motor Bearings
Motors are provided with prelubricated bearings. Any
lubrication instructions shown on the motor nameplate
supersede instructions below.
Motor bearings without provisions for relubrication will
operate up to 10 years under normal conditions with no
maintenance. In severe applications, high temperatures or
excessive contaminates, it is advisable to have the
maintenance department disassemble and lubricate the
bearings after 3 years of operation to prevent interruption
of service. For motors with provisions for relubrication,
follow intervals of the table below.
NOTICE! Motors are provided with a polyurea
mineral oil NGLI #2 grease. All additions to the motor
bearings are to be with a compatible grease such as
Exxon Mobil Polyrex EM and Chevron SRI.
The above intervals should be reduced to half for vertical
shaft installations.
Conditions Chart
For moist or otherwise contaminated installations; divide the interval by
a factor of 3. For vertical shaft installations divide the interval by a factor
of 2.
RPM Temp °F Greasing Interval
Up to 1000
-30 to 120 6 months
120 to 200 2 months
1000 to 3000
-30 to 120 3 months
120 to 200 1 month
Over 3000
-30 to 120 1 month
120 to 200 2 weeks
Any Speed < -30 Consult Factory
Any Speed > 200 1 week
Relubrication Intervals
Service
Conditions
NEMA Frame Size
Up to and
including 184T
213T-365T 404T and larger
1800 RPM
and less
Over 1800
RPM
1800 RPM
and less
Over 1800
RPM
1800 RPM
and less
Over 1800
RPM
Standard 3 yrs. 6 months 2 yrs. 6 months 1 yr. 3 months
Severe 1 yr. 3 months 1 yr. 3 months 6 months 1 months